[PATCH v3 0/5] Update ROCKCHIP DSI driver that uses dw-mipi-dsi bridge

[PATCH v3 0/5] Update ROCKCHIP DSI driver that uses dw-mipi-dsi bridge

[Nickey Yang]

We now have a generic dw-mipi-dsi bridge driver.So we send
this patchs to moving rockchip dw-mipi-dsi driver to that
in order to add new features(dual mipi support).
Update ROCKCHIP DSI controller driver that uses the Synopsys
DesignWare MIPI DSI host controller bridge.

ChangeLog:
v2:
   add err_pllref、remove unnecessary encoder.enable & disable
   correct spelling mistakes
v3:
   add Brian's patch "drm/bridge/synopsys: stop clobbering drvdata"
   (Link:https://patchwork.kernel.org/patch/10078493/)
   adjust drm/stm/dsi code for above
   drm/rockchip: Add ROCKCHIP DW MIPI DSI controller driver:
       call dw_mipi_dsi_unbind() in dw_mipi_dsi_rockchip_unbind()
       fix typo, use of_device_get_match_data(),
       change some ‘bind()’ logic into 'probe()'
       add 'dev_set_drvdata()'

Nickey Yang (5):
  drm/bridge/synopsys: stop clobbering drvdata
  drm/stm: dsi: Adjust dw_mipi_dsi_probe and remove
  dt-bindings: display: rockchip: update DSI controller
  drm/rockchip: Add ROCKCHIP DW MIPI DSI controller driver
  arm64: dts: rockchip: update mipi node for RK3399

 .../display/rockchip/dw_mipi_dsi_rockchip.txt      |   23 +-
 arch/arm64/boot/dts/rockchip/rk3399.dtsi           |    8 +-
 drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c      |   36 +-
 drivers/gpu/drm/rockchip/Kconfig                   |    2 +-
 drivers/gpu/drm/rockchip/Makefile                  |    2 +-
 drivers/gpu/drm/rockchip/dw-mipi-dsi.c             | 1349 --------------------
 drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c    |  764 +++++++++++
 drivers/gpu/drm/rockchip/rockchip_drm_drv.c        |    2 +-
 drivers/gpu/drm/rockchip/rockchip_drm_drv.h        |    2 +-
 drivers/gpu/drm/stm/dw_mipi_dsi-stm.c              |    8 +-
 include/drm/bridge/dw_mipi_dsi.h                   |   17 +-
 11 files changed, 821 insertions(+), 1392 deletions(-)
 delete mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi.c
 create mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c

-- 
1.9.1

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[PATCH v3 1/5] drm/bridge/synopsys: stop clobbering drvdata

[Nickey Yang]

Bridge drivers/helpers shouldn't be clobbering the drvdata, since a
parent driver might need to own this. Instead, let's return our
'dw_mipi_dsi' object and have callers pass that back to us for removal.

Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Acked-by: Philippe Cornu <philippe.cornu@st.com>
Link:https://patchwork.kernel.org/patch/10078493/
---
 drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 36 ++++++++++-----------------
 include/drm/bridge/dw_mipi_dsi.h              | 17 ++++++++-----
 2 files changed, 24 insertions(+), 29 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index d9cca4f..c39c7dc 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -922,8 +922,6 @@ static int dw_mipi_dsi_bridge_attach(struct drm_bridge *bridge)
 	dsi->bridge.of_node = pdev->dev.of_node;
 #endif
 
-	dev_set_drvdata(dev, dsi);
-
 	return dsi;
 }
 
@@ -935,23 +933,16 @@ static void __dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi)
 /*
  * Probe/remove API, used from platforms based on the DRM bridge API.
  */
-int dw_mipi_dsi_probe(struct platform_device *pdev,
-		      const struct dw_mipi_dsi_plat_data *plat_data)
+struct dw_mipi_dsi *
+dw_mipi_dsi_probe(struct platform_device *pdev,
+		  const struct dw_mipi_dsi_plat_data *plat_data)
 {
-	struct dw_mipi_dsi *dsi;
-
-	dsi = __dw_mipi_dsi_probe(pdev, plat_data);
-	if (IS_ERR(dsi))
-		return PTR_ERR(dsi);
-
-	return 0;
+	return __dw_mipi_dsi_probe(pdev, plat_data);
 }
 EXPORT_SYMBOL_GPL(dw_mipi_dsi_probe);
 
-void dw_mipi_dsi_remove(struct platform_device *pdev)
+void dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi)
 {
-	struct dw_mipi_dsi *dsi = platform_get_drvdata(pdev);
-
 	mipi_dsi_host_unregister(&dsi->dsi_host);
 
 	__dw_mipi_dsi_remove(dsi);
@@ -961,31 +952,30 @@ void dw_mipi_dsi_remove(struct platform_device *pdev)
 /*
  * Bind/unbind API, used from platforms based on the component framework.
  */
-int dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
-		     const struct dw_mipi_dsi_plat_data *plat_data)
+struct dw_mipi_dsi *
+dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
+		 const struct dw_mipi_dsi_plat_data *plat_data)
 {
 	struct dw_mipi_dsi *dsi;
 	int ret;
 
 	dsi = __dw_mipi_dsi_probe(pdev, plat_data);
 	if (IS_ERR(dsi))
-		return PTR_ERR(dsi);
+		return dsi;
 
 	ret = drm_bridge_attach(encoder, &dsi->bridge, NULL);
 	if (ret) {
-		dw_mipi_dsi_remove(pdev);
+		dw_mipi_dsi_remove(dsi);
 		DRM_ERROR("Failed to initialize bridge with drm\n");
-		return ret;
+		return ERR_PTR(ret);
 	}
 
-	return 0;
+	return dsi;
 }
 EXPORT_SYMBOL_GPL(dw_mipi_dsi_bind);
 
-void dw_mipi_dsi_unbind(struct device *dev)
+void dw_mipi_dsi_unbind(struct dw_mipi_dsi *dsi)
 {
-	struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
-
 	__dw_mipi_dsi_remove(dsi);
 }
 EXPORT_SYMBOL_GPL(dw_mipi_dsi_unbind);
diff --git a/include/drm/bridge/dw_mipi_dsi.h b/include/drm/bridge/dw_mipi_dsi.h
index 9b30fec..d9c6d54 100644
--- a/include/drm/bridge/dw_mipi_dsi.h
+++ b/include/drm/bridge/dw_mipi_dsi.h
@@ -10,6 +10,8 @@
 #ifndef __DW_MIPI_DSI__
 #define __DW_MIPI_DSI__
 
+struct dw_mipi_dsi;
+
 struct dw_mipi_dsi_phy_ops {
 	int (*init)(void *priv_data);
 	int (*get_lane_mbps)(void *priv_data, struct drm_display_mode *mode,
@@ -29,11 +31,14 @@ struct dw_mipi_dsi_plat_data {
 	void *priv_data;
 };
 
-int dw_mipi_dsi_probe(struct platform_device *pdev,
-		      const struct dw_mipi_dsi_plat_data *plat_data);
-void dw_mipi_dsi_remove(struct platform_device *pdev);
-int dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
-		     const struct dw_mipi_dsi_plat_data *plat_data);
-void dw_mipi_dsi_unbind(struct device *dev);
+struct dw_mipi_dsi *dw_mipi_dsi_probe(struct platform_device *pdev,
+				      const struct dw_mipi_dsi_plat_data
+				      *plat_data);
+void dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi);
+struct dw_mipi_dsi *dw_mipi_dsi_bind(struct platform_device *pdev,
+				     struct drm_encoder *encoder,
+				     const struct dw_mipi_dsi_plat_data
+				     *plat_data);
+void dw_mipi_dsi_unbind(struct dw_mipi_dsi *dsi);
 
 #endif /* __DW_MIPI_DSI__ */
-- 
1.9.1

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Re: [PATCH v3 1/5] drm/bridge/synopsys: stop clobbering drvdata

[Sean Paul]

On Tue, Nov 28, 2017 at 07:20:02PM +0800, Nickey Yang wrote:

Looks like you paved the author. This should be From: Brian.

Sean

> Bridge drivers/helpers shouldn't be clobbering the drvdata, since a
> parent driver might need to own this. Instead, let's return our
> 'dw_mipi_dsi' object and have callers pass that back to us for removal.
> 
> Signed-off-by: Brian Norris <briannorris@chromium.org>
> Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
> Reviewed-by: Archit Taneja <architt@codeaurora.org>
> Acked-by: Philippe Cornu <philippe.cornu@st.com>
> Link:https://patchwork.kernel.org/patch/10078493/
> ---
>  drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 36 ++++++++++-----------------
>  include/drm/bridge/dw_mipi_dsi.h              | 17 ++++++++-----
>  2 files changed, 24 insertions(+), 29 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> index d9cca4f..c39c7dc 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> @@ -922,8 +922,6 @@ static int dw_mipi_dsi_bridge_attach(struct drm_bridge *bridge)
>  	dsi->bridge.of_node = pdev->dev.of_node;
>  #endif
>  
> -	dev_set_drvdata(dev, dsi);
> -
>  	return dsi;
>  }
>  
> @@ -935,23 +933,16 @@ static void __dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi)
>  /*
>   * Probe/remove API, used from platforms based on the DRM bridge API.
>   */
> -int dw_mipi_dsi_probe(struct platform_device *pdev,
> -		      const struct dw_mipi_dsi_plat_data *plat_data)
> +struct dw_mipi_dsi *
> +dw_mipi_dsi_probe(struct platform_device *pdev,
> +		  const struct dw_mipi_dsi_plat_data *plat_data)
>  {
> -	struct dw_mipi_dsi *dsi;
> -
> -	dsi = __dw_mipi_dsi_probe(pdev, plat_data);
> -	if (IS_ERR(dsi))
> -		return PTR_ERR(dsi);
> -
> -	return 0;
> +	return __dw_mipi_dsi_probe(pdev, plat_data);
>  }
>  EXPORT_SYMBOL_GPL(dw_mipi_dsi_probe);
>  
> -void dw_mipi_dsi_remove(struct platform_device *pdev)
> +void dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi)
>  {
> -	struct dw_mipi_dsi *dsi = platform_get_drvdata(pdev);
> -
>  	mipi_dsi_host_unregister(&dsi->dsi_host);
>  
>  	__dw_mipi_dsi_remove(dsi);
> @@ -961,31 +952,30 @@ void dw_mipi_dsi_remove(struct platform_device *pdev)
>  /*
>   * Bind/unbind API, used from platforms based on the component framework.
>   */
> -int dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
> -		     const struct dw_mipi_dsi_plat_data *plat_data)
> +struct dw_mipi_dsi *
> +dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
> +		 const struct dw_mipi_dsi_plat_data *plat_data)
>  {
>  	struct dw_mipi_dsi *dsi;
>  	int ret;
>  
>  	dsi = __dw_mipi_dsi_probe(pdev, plat_data);
>  	if (IS_ERR(dsi))
> -		return PTR_ERR(dsi);
> +		return dsi;
>  
>  	ret = drm_bridge_attach(encoder, &dsi->bridge, NULL);
>  	if (ret) {
> -		dw_mipi_dsi_remove(pdev);
> +		dw_mipi_dsi_remove(dsi);
>  		DRM_ERROR("Failed to initialize bridge with drm\n");
> -		return ret;
> +		return ERR_PTR(ret);
>  	}
>  
> -	return 0;
> +	return dsi;
>  }
>  EXPORT_SYMBOL_GPL(dw_mipi_dsi_bind);
>  
> -void dw_mipi_dsi_unbind(struct device *dev)
> +void dw_mipi_dsi_unbind(struct dw_mipi_dsi *dsi)
>  {
> -	struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
> -
>  	__dw_mipi_dsi_remove(dsi);
>  }
>  EXPORT_SYMBOL_GPL(dw_mipi_dsi_unbind);
> diff --git a/include/drm/bridge/dw_mipi_dsi.h b/include/drm/bridge/dw_mipi_dsi.h
> index 9b30fec..d9c6d54 100644
> --- a/include/drm/bridge/dw_mipi_dsi.h
> +++ b/include/drm/bridge/dw_mipi_dsi.h
> @@ -10,6 +10,8 @@
>  #ifndef __DW_MIPI_DSI__
>  #define __DW_MIPI_DSI__
>  
> +struct dw_mipi_dsi;
> +
>  struct dw_mipi_dsi_phy_ops {
>  	int (*init)(void *priv_data);
>  	int (*get_lane_mbps)(void *priv_data, struct drm_display_mode *mode,
> @@ -29,11 +31,14 @@ struct dw_mipi_dsi_plat_data {
>  	void *priv_data;
>  };
>  
> -int dw_mipi_dsi_probe(struct platform_device *pdev,
> -		      const struct dw_mipi_dsi_plat_data *plat_data);
> -void dw_mipi_dsi_remove(struct platform_device *pdev);
> -int dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
> -		     const struct dw_mipi_dsi_plat_data *plat_data);
> -void dw_mipi_dsi_unbind(struct device *dev);
> +struct dw_mipi_dsi *dw_mipi_dsi_probe(struct platform_device *pdev,
> +				      const struct dw_mipi_dsi_plat_data
> +				      *plat_data);
> +void dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi);
> +struct dw_mipi_dsi *dw_mipi_dsi_bind(struct platform_device *pdev,
> +				     struct drm_encoder *encoder,
> +				     const struct dw_mipi_dsi_plat_data
> +				     *plat_data);
> +void dw_mipi_dsi_unbind(struct dw_mipi_dsi *dsi);
>  
>  #endif /* __DW_MIPI_DSI__ */
> -- 
> 1.9.1
> 

-- 
Sean Paul, Software Engineer, Google / Chromium OS
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Re: [PATCH v3 1/5] drm/bridge/synopsys: stop clobbering drvdata

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 6259 bytes --]

Hi Nickey,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on drm/drm-next]
[also build test ERROR on v4.15-rc1 next-20171201]
[cannot apply to rockchip/for-next]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Nickey-Yang/Update-ROCKCHIP-DSI-driver-that-uses-dw-mipi-dsi-bridge/20171201-125654
base:   git://people.freedesktop.org/~airlied/linux.git drm-next
config: arm-allmodconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

Note: the linux-review/Nickey-Yang/Update-ROCKCHIP-DSI-driver-that-uses-dw-mipi-dsi-bridge/20171201-125654 HEAD f1eee2e077700ada27d5585bae6dedf4ac671bb5 builds fine.
      It only hurts bisectibility.

All error/warnings (new ones prefixed by >>):

   drivers/gpu/drm/stm/dw_mipi_dsi-stm.c: In function 'dw_mipi_dsi_stm_probe':
>> drivers/gpu/drm/stm/dw_mipi_dsi-stm.c:321:6: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
     ret = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data);
         ^
   drivers/gpu/drm/stm/dw_mipi_dsi-stm.c: In function 'dw_mipi_dsi_stm_remove':
>> drivers/gpu/drm/stm/dw_mipi_dsi-stm.c:335:21: error: passing argument 1 of 'dw_mipi_dsi_remove' from incompatible pointer type [-Werror=incompatible-pointer-types]
     dw_mipi_dsi_remove(pdev);
                        ^~~~
   In file included from drivers/gpu/drm/stm/dw_mipi_dsi-stm.c:15:0:
   include/drm/bridge/dw_mipi_dsi.h:37:6: note: expected 'struct dw_mipi_dsi *' but argument is of type 'struct platform_device *'
    void dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi);
         ^~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/dw_mipi_dsi_remove +335 drivers/gpu/drm/stm/dw_mipi_dsi-stm.c

c1c026db Philippe CORNU 2017-07-17  281  
c1c026db Philippe CORNU 2017-07-17  282  static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
c1c026db Philippe CORNU 2017-07-17  283  {
c1c026db Philippe CORNU 2017-07-17  284  	struct device *dev = &pdev->dev;
c1c026db Philippe CORNU 2017-07-17  285  	struct dw_mipi_dsi_stm *dsi;
c1c026db Philippe CORNU 2017-07-17  286  	struct resource *res;
c1c026db Philippe CORNU 2017-07-17  287  	int ret;
c1c026db Philippe CORNU 2017-07-17  288  
c1c026db Philippe CORNU 2017-07-17  289  	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
c1c026db Philippe CORNU 2017-07-17  290  	if (!dsi)
c1c026db Philippe CORNU 2017-07-17  291  		return -ENOMEM;
c1c026db Philippe CORNU 2017-07-17  292  
c1c026db Philippe CORNU 2017-07-17  293  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
c1c026db Philippe CORNU 2017-07-17  294  	if (!res) {
c1c026db Philippe CORNU 2017-07-17  295  		DRM_ERROR("Unable to get resource\n");
c1c026db Philippe CORNU 2017-07-17  296  		return -ENODEV;
c1c026db Philippe CORNU 2017-07-17  297  	}
c1c026db Philippe CORNU 2017-07-17  298  
c1c026db Philippe CORNU 2017-07-17  299  	dsi->base = devm_ioremap_resource(dev, res);
c1c026db Philippe CORNU 2017-07-17  300  	if (IS_ERR(dsi->base)) {
c1c026db Philippe CORNU 2017-07-17  301  		DRM_ERROR("Unable to get dsi registers\n");
c1c026db Philippe CORNU 2017-07-17  302  		return PTR_ERR(dsi->base);
c1c026db Philippe CORNU 2017-07-17  303  	}
c1c026db Philippe CORNU 2017-07-17  304  
c1c026db Philippe CORNU 2017-07-17  305  	dsi->pllref_clk = devm_clk_get(dev, "ref");
c1c026db Philippe CORNU 2017-07-17  306  	if (IS_ERR(dsi->pllref_clk)) {
c1c026db Philippe CORNU 2017-07-17  307  		ret = PTR_ERR(dsi->pllref_clk);
c1c026db Philippe CORNU 2017-07-17  308  		dev_err(dev, "Unable to get pll reference clock: %d\n", ret);
c1c026db Philippe CORNU 2017-07-17  309  		return ret;
c1c026db Philippe CORNU 2017-07-17  310  	}
c1c026db Philippe CORNU 2017-07-17  311  
c1c026db Philippe CORNU 2017-07-17  312  	ret = clk_prepare_enable(dsi->pllref_clk);
c1c026db Philippe CORNU 2017-07-17  313  	if (ret) {
c1c026db Philippe CORNU 2017-07-17  314  		dev_err(dev, "%s: Failed to enable pllref_clk\n", __func__);
c1c026db Philippe CORNU 2017-07-17  315  		return ret;
c1c026db Philippe CORNU 2017-07-17  316  	}
c1c026db Philippe CORNU 2017-07-17  317  
c1c026db Philippe CORNU 2017-07-17  318  	dw_mipi_dsi_stm_plat_data.base = dsi->base;
c1c026db Philippe CORNU 2017-07-17  319  	dw_mipi_dsi_stm_plat_data.priv_data = dsi;
c1c026db Philippe CORNU 2017-07-17  320  
c1c026db Philippe CORNU 2017-07-17 @321  	ret = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data);
c1c026db Philippe CORNU 2017-07-17  322  	if (ret) {
c1c026db Philippe CORNU 2017-07-17  323  		DRM_ERROR("Failed to initialize mipi dsi host\n");
c1c026db Philippe CORNU 2017-07-17  324  		clk_disable_unprepare(dsi->pllref_clk);
c1c026db Philippe CORNU 2017-07-17  325  	}
c1c026db Philippe CORNU 2017-07-17  326  
c1c026db Philippe CORNU 2017-07-17  327  	return ret;
c1c026db Philippe CORNU 2017-07-17  328  }
c1c026db Philippe CORNU 2017-07-17  329  
c1c026db Philippe CORNU 2017-07-17  330  static int dw_mipi_dsi_stm_remove(struct platform_device *pdev)
c1c026db Philippe CORNU 2017-07-17  331  {
c1c026db Philippe CORNU 2017-07-17  332  	struct dw_mipi_dsi_stm *dsi = dw_mipi_dsi_stm_plat_data.priv_data;
c1c026db Philippe CORNU 2017-07-17  333  
c1c026db Philippe CORNU 2017-07-17  334  	clk_disable_unprepare(dsi->pllref_clk);
c1c026db Philippe CORNU 2017-07-17 @335  	dw_mipi_dsi_remove(pdev);
c1c026db Philippe CORNU 2017-07-17  336  
c1c026db Philippe CORNU 2017-07-17  337  	return 0;
c1c026db Philippe CORNU 2017-07-17  338  }
c1c026db Philippe CORNU 2017-07-17  339  

:::::: The code at line 335 was first introduced by commit
:::::: c1c026dbc183497379502496316d5e2a22876b7e drm/stm: Add STM32 DSI controller driver

:::::: TO: Philippe CORNU <philippe.cornu@st.com>
:::::: CC: Benjamin Gaignard <benjamin.gaignard@linaro.org>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 64146 bytes --]

[PATCH v3 2/5] drm/stm: dsi: Adjust dw_mipi_dsi_probe and remove

[Nickey Yang]

Bridge drivers/helpers shouldn't be clobbering the drvdata, since a
parent driver might need to own this. Instead, let's return our
'dw_mipi_dsi' object and have callers pass that back to us for removal.
So adjust it.

Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
---
 drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
index e5b6310..80f9950 100644
--- a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
+++ b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
@@ -66,6 +66,7 @@ enum dsi_color {
 struct dw_mipi_dsi_stm {
 	void __iomem *base;
 	struct clk *pllref_clk;
+	struct dw_mipi_dsi *dmd;
 };
 
 static inline void dsi_write(struct dw_mipi_dsi_stm *dsi, u32 reg, u32 val)
@@ -318,10 +319,11 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
 	dw_mipi_dsi_stm_plat_data.base = dsi->base;
 	dw_mipi_dsi_stm_plat_data.priv_data = dsi;
 
-	ret = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data);
-	if (ret) {
+	dsi->dmd = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data);
+	if (IS_ERR(dsi->dmd)) {
 		DRM_ERROR("Failed to initialize mipi dsi host\n");
 		clk_disable_unprepare(dsi->pllref_clk);
+		return PTR_ERR(dsi->dmd);
 	}
 
 	return ret;
@@ -332,7 +334,7 @@ static int dw_mipi_dsi_stm_remove(struct platform_device *pdev)
 	struct dw_mipi_dsi_stm *dsi = dw_mipi_dsi_stm_plat_data.priv_data;
 
 	clk_disable_unprepare(dsi->pllref_clk);
-	dw_mipi_dsi_remove(pdev);
+	dw_mipi_dsi_remove(dsi->dmd);
 
 	return 0;
 }
-- 
1.9.1

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Re: [PATCH v3 2/5] drm/stm: dsi: Adjust dw_mipi_dsi_probe and remove

[Brian Norris]

Hi Nickey,

On Tue, Nov 28, 2017 at 07:20:03PM +0800, Nickey Yang wrote:
> Bridge drivers/helpers shouldn't be clobbering the drvdata, since a
> parent driver might need to own this. Instead, let's return our

Other reviews have suggested this might be described as "SoC glue
driver", not "parent driver". Also, the subject probably should include
either "mipi" or "dw-mipi-dsi".

> 'dw_mipi_dsi' object and have callers pass that back to us for removal.
> So adjust it.
> 
> Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
> ---
>  drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)

So, you've split my patch in 2 and called it your own (see patch 1,
which still has the 'From' (i.e., author) line as "Nickey Yang", not
"Brian Norris"). You need to keep the author accurate. (It's good to add
an additional 'Signed-off-by' of your own, but keep the author.)

When developing in your local git tree, make sure that the 'Author' line
is accurate in 'git log'. Then 'git format-patch + git send-email' will
format things correctly, such that your email headers will say "From:
Nickey Yang", but then git-send-email will make sure there's an
additional line within the body of the email to attribute the author.

For example, see how this patch was sent by Doug in a later series, but has my
authorship:

https://patchwork.kernel.org/patch/9188419/

The email header says:

From: Douglas Anderson <dianders@chromium.org>

but the body of the mail includes:

From: Brian Norris <briannorris@chromium.org>

This ends up correctly-attributed in the mainline git tree:

commit 36b5d460261f16563f9196c49c936b3e17d237e3
Author: Brian Norris <briannorris@chromium.org>
Date:   Mon Jun 20 10:56:42 2016 -0700

    phy: rockchip-emmc: configure default output tap delay
...
    Signed-off-by: Brian Norris <briannorris@chromium.org>
    Signed-off-by: Douglas Anderson <dianders@chromium.org>


But more importantly: you can't split my patch in 2, because it makes
the series non-bisectable. As you split it, patch 1 is making an API
change, but it doesn't update the drivers that use that API. So the STM
DSI driver doesn't compile if you apply only patch 1. That's discouraged
within the Linux kernel.

So, let's make sure to keep this patch in 1 piece.

Brian

> 
> diff --git a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> index e5b6310..80f9950 100644
> --- a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> +++ b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> @@ -66,6 +66,7 @@ enum dsi_color {
>  struct dw_mipi_dsi_stm {
>  	void __iomem *base;
>  	struct clk *pllref_clk;
> +	struct dw_mipi_dsi *dmd;
>  };
>  
>  static inline void dsi_write(struct dw_mipi_dsi_stm *dsi, u32 reg, u32 val)
> @@ -318,10 +319,11 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
>  	dw_mipi_dsi_stm_plat_data.base = dsi->base;
>  	dw_mipi_dsi_stm_plat_data.priv_data = dsi;
>  
> -	ret = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data);
> -	if (ret) {
> +	dsi->dmd = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data);
> +	if (IS_ERR(dsi->dmd)) {
>  		DRM_ERROR("Failed to initialize mipi dsi host\n");
>  		clk_disable_unprepare(dsi->pllref_clk);
> +		return PTR_ERR(dsi->dmd);
>  	}
>  
>  	return ret;
> @@ -332,7 +334,7 @@ static int dw_mipi_dsi_stm_remove(struct platform_device *pdev)
>  	struct dw_mipi_dsi_stm *dsi = dw_mipi_dsi_stm_plat_data.priv_data;
>  
>  	clk_disable_unprepare(dsi->pllref_clk);
> -	dw_mipi_dsi_remove(pdev);
> +	dw_mipi_dsi_remove(dsi->dmd);
>  
>  	return 0;
>  }
> -- 
> 1.9.1
> 
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Re: [PATCH v3 2/5] drm/stm: dsi: Adjust dw_mipi_dsi_probe and remove

[Sean Paul]

On Tue, Nov 28, 2017 at 10:41:29AM -0800, Brian Norris wrote:
> Hi Nickey,
> 
> On Tue, Nov 28, 2017 at 07:20:03PM +0800, Nickey Yang wrote:
> > Bridge drivers/helpers shouldn't be clobbering the drvdata, since a
> > parent driver might need to own this. Instead, let's return our
> 
> Other reviews have suggested this might be described as "SoC glue
> driver", not "parent driver". Also, the subject probably should include
> either "mipi" or "dw-mipi-dsi".
> 
> > 'dw_mipi_dsi' object and have callers pass that back to us for removal.
> > So adjust it.
> > 
> > Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
> > ---
> >  drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 8 +++++---
> >  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> So, you've split my patch in 2 and called it your own (see patch 1,
> which still has the 'From' (i.e., author) line as "Nickey Yang", not
> "Brian Norris"). You need to keep the author accurate. (It's good to add
> an additional 'Signed-off-by' of your own, but keep the author.)
> 

Also cc everyone who commented on the previous version of the patch so they
can review the new version. Laurent had questions about the patch, and was
not cc'd here.

Sean

> When developing in your local git tree, make sure that the 'Author' line
> is accurate in 'git log'. Then 'git format-patch + git send-email' will
> format things correctly, such that your email headers will say "From:
> Nickey Yang", but then git-send-email will make sure there's an
> additional line within the body of the email to attribute the author.
> 
> For example, see how this patch was sent by Doug in a later series, but has my
> authorship:
> 
> https://patchwork.kernel.org/patch/9188419/
> 
> The email header says:
> 
> From: Douglas Anderson <dianders@chromium.org>
> 
> but the body of the mail includes:
> 
> From: Brian Norris <briannorris@chromium.org>
> 
> This ends up correctly-attributed in the mainline git tree:
> 
> commit 36b5d460261f16563f9196c49c936b3e17d237e3
> Author: Brian Norris <briannorris@chromium.org>
> Date:   Mon Jun 20 10:56:42 2016 -0700
> 
>     phy: rockchip-emmc: configure default output tap delay
> ...
>     Signed-off-by: Brian Norris <briannorris@chromium.org>
>     Signed-off-by: Douglas Anderson <dianders@chromium.org>
> 
> 
> But more importantly: you can't split my patch in 2, because it makes
> the series non-bisectable. As you split it, patch 1 is making an API
> change, but it doesn't update the drivers that use that API. So the STM
> DSI driver doesn't compile if you apply only patch 1. That's discouraged
> within the Linux kernel.
> 
> So, let's make sure to keep this patch in 1 piece.
> 
> Brian
> 
> > 
> > diff --git a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> > index e5b6310..80f9950 100644
> > --- a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> > +++ b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> > @@ -66,6 +66,7 @@ enum dsi_color {
> >  struct dw_mipi_dsi_stm {
> >  	void __iomem *base;
> >  	struct clk *pllref_clk;
> > +	struct dw_mipi_dsi *dmd;
> >  };
> >  
> >  static inline void dsi_write(struct dw_mipi_dsi_stm *dsi, u32 reg, u32 val)
> > @@ -318,10 +319,11 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
> >  	dw_mipi_dsi_stm_plat_data.base = dsi->base;
> >  	dw_mipi_dsi_stm_plat_data.priv_data = dsi;
> >  
> > -	ret = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data);
> > -	if (ret) {
> > +	dsi->dmd = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data);
> > +	if (IS_ERR(dsi->dmd)) {
> >  		DRM_ERROR("Failed to initialize mipi dsi host\n");
> >  		clk_disable_unprepare(dsi->pllref_clk);
> > +		return PTR_ERR(dsi->dmd);
> >  	}
> >  
> >  	return ret;
> > @@ -332,7 +334,7 @@ static int dw_mipi_dsi_stm_remove(struct platform_device *pdev)
> >  	struct dw_mipi_dsi_stm *dsi = dw_mipi_dsi_stm_plat_data.priv_data;
> >  
> >  	clk_disable_unprepare(dsi->pllref_clk);
> > -	dw_mipi_dsi_remove(pdev);
> > +	dw_mipi_dsi_remove(dsi->dmd);
> >  
> >  	return 0;
> >  }
> > -- 
> > 1.9.1
> > 

-- 
Sean Paul, Software Engineer, Google / Chromium OS

[PATCH v3 3/5] dt-bindings: display: rockchip: update DSI controller

[Nickey Yang]

This patch update documentation of device tree bindings for the rockchip
DSI controller based on the Synopsys DesignWare MIPI DSI host controller.

Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
---
 .../display/rockchip/dw_mipi_dsi_rockchip.txt      | 23 ++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt b/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
index 6bb59ab..336909d 100644
--- a/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
+++ b/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
@@ -14,6 +14,8 @@ Required properties:
 - rockchip,grf: this soc should set GRF regs to mux vopl/vopb.
 - ports: contain a port node with endpoint definitions as defined in [2].
   For vopb,set the reg = <0> and set the reg = <1> for vopl.
+- video port 0 for the VOP input, the remote endpoint maybe vopb or vopl
+- video port 1 for either a panel or subsequent encoder
 
 Optional properties:
 - power-domains: a phandle to mipi dsi power domain node.
@@ -40,11 +42,10 @@ Example:
 		ports {
 			#address-cells = <1>;
 			#size-cells = <0>;
-			reg = <1>;
 
-			mipi_in: port {
-				#address-cells = <1>;
-				#size-cells = <0>;
+			mipi_in: port@0 {
+				reg = <0>;
+
 				mipi_in_vopb: endpoint@0 {
 					reg = <0>;
 					remote-endpoint = <&vopb_out_mipi>;
@@ -54,6 +55,14 @@ Example:
 					remote-endpoint = <&vopl_out_mipi>;
 				};
 			};
+
+			mipi_out: port@1 {
+				reg = <1>;
+
+				mipi_out_panel: endpoint {
+					remote-endpoint = <&panel_in_mipi>;
+				};
+			};
 		};
 
 		panel {
@@ -64,5 +73,11 @@ Example:
 			pinctrl-names = "default";
 			pinctrl-0 = <&lcd_en>;
 			backlight = <&backlight>;
+
+			port {
+				panel_in_mipi: endpoint {
+					remote-endpoint = <&mipi_out_panel>;
+				};
+			};
 		};
 	};
-- 
1.9.1

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Re: [PATCH v3 3/5] dt-bindings: display: rockchip: update DSI controller

[Brian Norris]

On Tue, Nov 28, 2017 at 07:20:04PM +0800, Nickey Yang wrote:
> This patch update documentation of device tree bindings for the rockchip
> DSI controller based on the Synopsys DesignWare MIPI DSI host controller.

It might help to describe why you're doing this. Just saying "update" is
pretty vague. In this case, it's something like "describe panel/port
links, including unit addresses".

> 
> Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
> ---
>  .../display/rockchip/dw_mipi_dsi_rockchip.txt      | 23 ++++++++++++++++++----
>  1 file changed, 19 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt b/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
> index 6bb59ab..336909d 100644
> --- a/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
> +++ b/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
> @@ -14,6 +14,8 @@ Required properties:
>  - rockchip,grf: this soc should set GRF regs to mux vopl/vopb.
>  - ports: contain a port node with endpoint definitions as defined in [2].
>    For vopb,set the reg = <0> and set the reg = <1> for vopl.
> +- video port 0 for the VOP input, the remote endpoint maybe vopb or vopl
> +- video port 1 for either a panel or subsequent encoder
>  
>  Optional properties:
>  - power-domains: a phandle to mipi dsi power domain node.
> @@ -40,11 +42,10 @@ Example:
>  		ports {
>  			#address-cells = <1>;
>  			#size-cells = <0>;
> -			reg = <1>;
>  
> -			mipi_in: port {
> -				#address-cells = <1>;
> -				#size-cells = <0>;

^^ You're removing #{address,size}-cells here, but then port@0 will
still have subnodes that have 'reg' properties, so I think you need to
keep the -cells properties.

Brian

> +			mipi_in: port@0 {
> +				reg = <0>;
> +
>  				mipi_in_vopb: endpoint@0 {
>  					reg = <0>;
>  					remote-endpoint = <&vopb_out_mipi>;
> @@ -54,6 +55,14 @@ Example:
>  					remote-endpoint = <&vopl_out_mipi>;
>  				};
>  			};
> +
> +			mipi_out: port@1 {
> +				reg = <1>;
> +
> +				mipi_out_panel: endpoint {
> +					remote-endpoint = <&panel_in_mipi>;
> +				};
> +			};
>  		};
>  
>  		panel {
> @@ -64,5 +73,11 @@ Example:
>  			pinctrl-names = "default";
>  			pinctrl-0 = <&lcd_en>;
>  			backlight = <&backlight>;
> +
> +			port {
> +				panel_in_mipi: endpoint {
> +					remote-endpoint = <&mipi_out_panel>;
> +				};
> +			};
>  		};
>  	};
> -- 
> 1.9.1
> 
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[PATCH v3 4/5] drm/rockchip: Add ROCKCHIP DW MIPI DSI controller driver

[Nickey Yang]

Add the ROCKCHIP DSI controller driver that uses the Synopsys DesignWare
MIPI DSI host controller bridge.

v2:
   add err_pllref, remove unnecessary encoder.enable & disable
   correct spelling mistakes
v3:
   call dw_mipi_dsi_unbind() in dw_mipi_dsi_rockchip_unbind()
   fix typo, use of_device_get_match_data(),
   change some ‘bind()’ logic into 'probe()'
   add 'dev_set_drvdata()'

Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
---
 drivers/gpu/drm/rockchip/Kconfig                |    2 +-
 drivers/gpu/drm/rockchip/Makefile               |    2 +-
 drivers/gpu/drm/rockchip/dw-mipi-dsi.c          | 1349 -----------------------
 drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c |  764 +++++++++++++
 drivers/gpu/drm/rockchip/rockchip_drm_drv.c     |    2 +-
 drivers/gpu/drm/rockchip/rockchip_drm_drv.h     |    2 +-
 6 files changed, 768 insertions(+), 1353 deletions(-)
 delete mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi.c
 create mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c

diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
index 0ccc762..9eb4795 100644
--- a/drivers/gpu/drm/rockchip/Kconfig
+++ b/drivers/gpu/drm/rockchip/Kconfig
@@ -7,7 +7,7 @@ config DRM_ROCKCHIP
 	select VIDEOMODE_HELPERS
 	select DRM_ANALOGIX_DP if ROCKCHIP_ANALOGIX_DP
 	select DRM_DW_HDMI if ROCKCHIP_DW_HDMI
-	select DRM_MIPI_DSI if ROCKCHIP_DW_MIPI_DSI
+	select DRM_DW_MIPI_DSI if ROCKCHIP_DW_MIPI_DSI
 	select SND_SOC_HDMI_CODEC if ROCKCHIP_CDN_DP && SND_SOC
 	help
 	  Choose this option if you have a Rockchip soc chipset.
diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile
index a314e21..c05fe47 100644
--- a/drivers/gpu/drm/rockchip/Makefile
+++ b/drivers/gpu/drm/rockchip/Makefile
@@ -11,7 +11,7 @@ rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o
 rockchipdrm-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o
 rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o
 rockchipdrm-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o
-rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi.o
+rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi_rockchip.o
 rockchipdrm-$(CONFIG_ROCKCHIP_INNO_HDMI) += inno_hdmi.o
 rockchipdrm-$(CONFIG_ROCKCHIP_LVDS) += rockchip_lvds.o
 
diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
deleted file mode 100644
index b15755b..0000000
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ /dev/null
@@ -1,1349 +0,0 @@
-/*
- * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-#include <linux/clk.h>
-#include <linux/component.h>
-#include <linux/iopoll.h>
-#include <linux/math64.h>
-#include <linux/module.h>
-#include <linux/of_device.h>
-#include <linux/pm_runtime.h>
-#include <linux/regmap.h>
-#include <linux/reset.h>
-#include <linux/mfd/syscon.h>
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_crtc.h>
-#include <drm/drm_crtc_helper.h>
-#include <drm/drm_mipi_dsi.h>
-#include <drm/drm_of.h>
-#include <drm/drm_panel.h>
-#include <drm/drmP.h>
-#include <video/mipi_display.h>
-
-#include "rockchip_drm_drv.h"
-#include "rockchip_drm_vop.h"
-
-#define DRIVER_NAME    "dw-mipi-dsi"
-
-#define RK3288_GRF_SOC_CON6		0x025c
-#define RK3288_DSI0_SEL_VOP_LIT		BIT(6)
-#define RK3288_DSI1_SEL_VOP_LIT		BIT(9)
-
-#define RK3399_GRF_SOC_CON20		0x6250
-#define RK3399_DSI0_SEL_VOP_LIT		BIT(0)
-#define RK3399_DSI1_SEL_VOP_LIT		BIT(4)
-
-/* disable turnrequest, turndisable, forcetxstopmode, forcerxmode */
-#define RK3399_GRF_SOC_CON22		0x6258
-#define RK3399_GRF_DSI_MODE		0xffff0000
-
-#define DSI_VERSION			0x00
-#define DSI_PWR_UP			0x04
-#define RESET				0
-#define POWERUP				BIT(0)
-
-#define DSI_CLKMGR_CFG			0x08
-#define TO_CLK_DIVIDSION(div)		(((div) & 0xff) << 8)
-#define TX_ESC_CLK_DIVIDSION(div)	(((div) & 0xff) << 0)
-
-#define DSI_DPI_VCID			0x0c
-#define DPI_VID(vid)			(((vid) & 0x3) << 0)
-
-#define DSI_DPI_COLOR_CODING		0x10
-#define EN18_LOOSELY			BIT(8)
-#define DPI_COLOR_CODING_16BIT_1	0x0
-#define DPI_COLOR_CODING_16BIT_2	0x1
-#define DPI_COLOR_CODING_16BIT_3	0x2
-#define DPI_COLOR_CODING_18BIT_1	0x3
-#define DPI_COLOR_CODING_18BIT_2	0x4
-#define DPI_COLOR_CODING_24BIT		0x5
-
-#define DSI_DPI_CFG_POL			0x14
-#define COLORM_ACTIVE_LOW		BIT(4)
-#define SHUTD_ACTIVE_LOW		BIT(3)
-#define HSYNC_ACTIVE_LOW		BIT(2)
-#define VSYNC_ACTIVE_LOW		BIT(1)
-#define DATAEN_ACTIVE_LOW		BIT(0)
-
-#define DSI_DPI_LP_CMD_TIM		0x18
-#define OUTVACT_LPCMD_TIME(p)		(((p) & 0xff) << 16)
-#define INVACT_LPCMD_TIME(p)		((p) & 0xff)
-
-#define DSI_DBI_CFG			0x20
-#define DSI_DBI_CMDSIZE			0x28
-
-#define DSI_PCKHDL_CFG			0x2c
-#define EN_CRC_RX			BIT(4)
-#define EN_ECC_RX			BIT(3)
-#define EN_BTA				BIT(2)
-#define EN_EOTP_RX			BIT(1)
-#define EN_EOTP_TX			BIT(0)
-
-#define DSI_MODE_CFG			0x34
-#define ENABLE_VIDEO_MODE		0
-#define ENABLE_CMD_MODE			BIT(0)
-
-#define DSI_VID_MODE_CFG		0x38
-#define FRAME_BTA_ACK			BIT(14)
-#define ENABLE_LOW_POWER		(0x3f << 8)
-#define ENABLE_LOW_POWER_MASK		(0x3f << 8)
-#define VID_MODE_TYPE_NON_BURST_SYNC_PULSES	0x0
-#define VID_MODE_TYPE_NON_BURST_SYNC_EVENTS	0x1
-#define VID_MODE_TYPE_BURST			0x2
-#define VID_MODE_TYPE_MASK			0x3
-
-#define DSI_VID_PKT_SIZE		0x3c
-#define VID_PKT_SIZE(p)			(((p) & 0x3fff) << 0)
-#define VID_PKT_MAX_SIZE		0x3fff
-
-#define DSI_VID_HSA_TIME		0x48
-#define DSI_VID_HBP_TIME		0x4c
-#define DSI_VID_HLINE_TIME		0x50
-#define DSI_VID_VSA_LINES		0x54
-#define DSI_VID_VBP_LINES		0x58
-#define DSI_VID_VFP_LINES		0x5c
-#define DSI_VID_VACTIVE_LINES		0x60
-#define DSI_CMD_MODE_CFG		0x68
-#define MAX_RD_PKT_SIZE_LP		BIT(24)
-#define DCS_LW_TX_LP			BIT(19)
-#define DCS_SR_0P_TX_LP			BIT(18)
-#define DCS_SW_1P_TX_LP			BIT(17)
-#define DCS_SW_0P_TX_LP			BIT(16)
-#define GEN_LW_TX_LP			BIT(14)
-#define GEN_SR_2P_TX_LP			BIT(13)
-#define GEN_SR_1P_TX_LP			BIT(12)
-#define GEN_SR_0P_TX_LP			BIT(11)
-#define GEN_SW_2P_TX_LP			BIT(10)
-#define GEN_SW_1P_TX_LP			BIT(9)
-#define GEN_SW_0P_TX_LP			BIT(8)
-#define EN_ACK_RQST			BIT(1)
-#define EN_TEAR_FX			BIT(0)
-
-#define CMD_MODE_ALL_LP			(MAX_RD_PKT_SIZE_LP | \
-					 DCS_LW_TX_LP | \
-					 DCS_SR_0P_TX_LP | \
-					 DCS_SW_1P_TX_LP | \
-					 DCS_SW_0P_TX_LP | \
-					 GEN_LW_TX_LP | \
-					 GEN_SR_2P_TX_LP | \
-					 GEN_SR_1P_TX_LP | \
-					 GEN_SR_0P_TX_LP | \
-					 GEN_SW_2P_TX_LP | \
-					 GEN_SW_1P_TX_LP | \
-					 GEN_SW_0P_TX_LP)
-
-#define DSI_GEN_HDR			0x6c
-#define GEN_HDATA(data)			(((data) & 0xffff) << 8)
-#define GEN_HDATA_MASK			(0xffff << 8)
-#define GEN_HTYPE(type)			(((type) & 0xff) << 0)
-#define GEN_HTYPE_MASK			0xff
-
-#define DSI_GEN_PLD_DATA		0x70
-
-#define DSI_CMD_PKT_STATUS		0x74
-#define GEN_CMD_EMPTY			BIT(0)
-#define GEN_CMD_FULL			BIT(1)
-#define GEN_PLD_W_EMPTY			BIT(2)
-#define GEN_PLD_W_FULL			BIT(3)
-#define GEN_PLD_R_EMPTY			BIT(4)
-#define GEN_PLD_R_FULL			BIT(5)
-#define GEN_RD_CMD_BUSY			BIT(6)
-
-#define DSI_TO_CNT_CFG			0x78
-#define HSTX_TO_CNT(p)			(((p) & 0xffff) << 16)
-#define LPRX_TO_CNT(p)			((p) & 0xffff)
-
-#define DSI_BTA_TO_CNT			0x8c
-#define DSI_LPCLK_CTRL			0x94
-#define AUTO_CLKLANE_CTRL		BIT(1)
-#define PHY_TXREQUESTCLKHS		BIT(0)
-
-#define DSI_PHY_TMR_LPCLK_CFG		0x98
-#define PHY_CLKHS2LP_TIME(lbcc)		(((lbcc) & 0x3ff) << 16)
-#define PHY_CLKLP2HS_TIME(lbcc)		((lbcc) & 0x3ff)
-
-#define DSI_PHY_TMR_CFG			0x9c
-#define PHY_HS2LP_TIME(lbcc)		(((lbcc) & 0xff) << 24)
-#define PHY_LP2HS_TIME(lbcc)		(((lbcc) & 0xff) << 16)
-#define MAX_RD_TIME(lbcc)		((lbcc) & 0x7fff)
-
-#define DSI_PHY_RSTZ			0xa0
-#define PHY_DISFORCEPLL			0
-#define PHY_ENFORCEPLL			BIT(3)
-#define PHY_DISABLECLK			0
-#define PHY_ENABLECLK			BIT(2)
-#define PHY_RSTZ			0
-#define PHY_UNRSTZ			BIT(1)
-#define PHY_SHUTDOWNZ			0
-#define PHY_UNSHUTDOWNZ			BIT(0)
-
-#define DSI_PHY_IF_CFG			0xa4
-#define N_LANES(n)			((((n) - 1) & 0x3) << 0)
-#define PHY_STOP_WAIT_TIME(cycle)	(((cycle) & 0xff) << 8)
-
-#define DSI_PHY_STATUS			0xb0
-#define LOCK				BIT(0)
-#define STOP_STATE_CLK_LANE		BIT(2)
-
-#define DSI_PHY_TST_CTRL0		0xb4
-#define PHY_TESTCLK			BIT(1)
-#define PHY_UNTESTCLK			0
-#define PHY_TESTCLR			BIT(0)
-#define PHY_UNTESTCLR			0
-
-#define DSI_PHY_TST_CTRL1		0xb8
-#define PHY_TESTEN			BIT(16)
-#define PHY_UNTESTEN			0
-#define PHY_TESTDOUT(n)			(((n) & 0xff) << 8)
-#define PHY_TESTDIN(n)			(((n) & 0xff) << 0)
-
-#define DSI_INT_ST0			0xbc
-#define DSI_INT_ST1			0xc0
-#define DSI_INT_MSK0			0xc4
-#define DSI_INT_MSK1			0xc8
-
-#define PHY_STATUS_TIMEOUT_US		10000
-#define CMD_PKT_STATUS_TIMEOUT_US	20000
-
-#define BYPASS_VCO_RANGE	BIT(7)
-#define VCO_RANGE_CON_SEL(val)	(((val) & 0x7) << 3)
-#define VCO_IN_CAP_CON_DEFAULT	(0x0 << 1)
-#define VCO_IN_CAP_CON_LOW	(0x1 << 1)
-#define VCO_IN_CAP_CON_HIGH	(0x2 << 1)
-#define REF_BIAS_CUR_SEL	BIT(0)
-
-#define CP_CURRENT_3MA		BIT(3)
-#define CP_PROGRAM_EN		BIT(7)
-#define LPF_PROGRAM_EN		BIT(6)
-#define LPF_RESISTORS_20_KOHM	0
-
-#define HSFREQRANGE_SEL(val)	(((val) & 0x3f) << 1)
-
-#define INPUT_DIVIDER(val)	(((val) - 1) & 0x7f)
-#define LOW_PROGRAM_EN		0
-#define HIGH_PROGRAM_EN		BIT(7)
-#define LOOP_DIV_LOW_SEL(val)	(((val) - 1) & 0x1f)
-#define LOOP_DIV_HIGH_SEL(val)	((((val) - 1) >> 5) & 0x1f)
-#define PLL_LOOP_DIV_EN		BIT(5)
-#define PLL_INPUT_DIV_EN	BIT(4)
-
-#define POWER_CONTROL		BIT(6)
-#define INTERNAL_REG_CURRENT	BIT(3)
-#define BIAS_BLOCK_ON		BIT(2)
-#define BANDGAP_ON		BIT(0)
-
-#define TER_RESISTOR_HIGH	BIT(7)
-#define	TER_RESISTOR_LOW	0
-#define LEVEL_SHIFTERS_ON	BIT(6)
-#define TER_CAL_DONE		BIT(5)
-#define SETRD_MAX		(0x7 << 2)
-#define POWER_MANAGE		BIT(1)
-#define TER_RESISTORS_ON	BIT(0)
-
-#define BIASEXTR_SEL(val)	((val) & 0x7)
-#define BANDGAP_SEL(val)	((val) & 0x7)
-#define TLP_PROGRAM_EN		BIT(7)
-#define THS_PRE_PROGRAM_EN	BIT(7)
-#define THS_ZERO_PROGRAM_EN	BIT(6)
-
-#define DW_MIPI_NEEDS_PHY_CFG_CLK	BIT(0)
-#define DW_MIPI_NEEDS_GRF_CLK		BIT(1)
-
-enum {
-	BANDGAP_97_07,
-	BANDGAP_98_05,
-	BANDGAP_99_02,
-	BANDGAP_100_00,
-	BANDGAP_93_17,
-	BANDGAP_94_15,
-	BANDGAP_95_12,
-	BANDGAP_96_10,
-};
-
-enum {
-	BIASEXTR_87_1,
-	BIASEXTR_91_5,
-	BIASEXTR_95_9,
-	BIASEXTR_100,
-	BIASEXTR_105_94,
-	BIASEXTR_111_88,
-	BIASEXTR_118_8,
-	BIASEXTR_127_7,
-};
-
-struct dw_mipi_dsi_plat_data {
-	u32 dsi0_en_bit;
-	u32 dsi1_en_bit;
-	u32 grf_switch_reg;
-	u32 grf_dsi0_mode;
-	u32 grf_dsi0_mode_reg;
-	unsigned int flags;
-	unsigned int max_data_lanes;
-};
-
-struct dw_mipi_dsi {
-	struct drm_encoder encoder;
-	struct drm_connector connector;
-	struct mipi_dsi_host dsi_host;
-	struct drm_panel *panel;
-	struct device *dev;
-	struct regmap *grf_regmap;
-	void __iomem *base;
-
-	struct clk *grf_clk;
-	struct clk *pllref_clk;
-	struct clk *pclk;
-	struct clk *phy_cfg_clk;
-
-	int dpms_mode;
-	unsigned int lane_mbps; /* per lane */
-	u32 channel;
-	u32 lanes;
-	u32 format;
-	u16 input_div;
-	u16 feedback_div;
-	unsigned long mode_flags;
-
-	const struct dw_mipi_dsi_plat_data *pdata;
-};
-
-enum dw_mipi_dsi_mode {
-	DW_MIPI_DSI_CMD_MODE,
-	DW_MIPI_DSI_VID_MODE,
-};
-
-struct dphy_pll_testdin_map {
-	unsigned int max_mbps;
-	u8 testdin;
-};
-
-/* The table is based on 27MHz DPHY pll reference clock. */
-static const struct dphy_pll_testdin_map dptdin_map[] = {
-	{  90, 0x00}, { 100, 0x10}, { 110, 0x20}, { 130, 0x01},
-	{ 140, 0x11}, { 150, 0x21}, { 170, 0x02}, { 180, 0x12},
-	{ 200, 0x22}, { 220, 0x03}, { 240, 0x13}, { 250, 0x23},
-	{ 270, 0x04}, { 300, 0x14}, { 330, 0x05}, { 360, 0x15},
-	{ 400, 0x25}, { 450, 0x06}, { 500, 0x16}, { 550, 0x07},
-	{ 600, 0x17}, { 650, 0x08}, { 700, 0x18}, { 750, 0x09},
-	{ 800, 0x19}, { 850, 0x29}, { 900, 0x39}, { 950, 0x0a},
-	{1000, 0x1a}, {1050, 0x2a}, {1100, 0x3a}, {1150, 0x0b},
-	{1200, 0x1b}, {1250, 0x2b}, {1300, 0x3b}, {1350, 0x0c},
-	{1400, 0x1c}, {1450, 0x2c}, {1500, 0x3c}
-};
-
-static int max_mbps_to_testdin(unsigned int max_mbps)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(dptdin_map); i++)
-		if (dptdin_map[i].max_mbps > max_mbps)
-			return dptdin_map[i].testdin;
-
-	return -EINVAL;
-}
-
-/*
- * The controller should generate 2 frames before
- * preparing the peripheral.
- */
-static void dw_mipi_dsi_wait_for_two_frames(struct drm_display_mode *mode)
-{
-	int refresh, two_frames;
-
-	refresh = drm_mode_vrefresh(mode);
-	two_frames = DIV_ROUND_UP(MSEC_PER_SEC, refresh) * 2;
-	msleep(two_frames);
-}
-
-static inline struct dw_mipi_dsi *host_to_dsi(struct mipi_dsi_host *host)
-{
-	return container_of(host, struct dw_mipi_dsi, dsi_host);
-}
-
-static inline struct dw_mipi_dsi *con_to_dsi(struct drm_connector *con)
-{
-	return container_of(con, struct dw_mipi_dsi, connector);
-}
-
-static inline struct dw_mipi_dsi *encoder_to_dsi(struct drm_encoder *encoder)
-{
-	return container_of(encoder, struct dw_mipi_dsi, encoder);
-}
-
-static inline void dsi_write(struct dw_mipi_dsi *dsi, u32 reg, u32 val)
-{
-	writel(val, dsi->base + reg);
-}
-
-static inline u32 dsi_read(struct dw_mipi_dsi *dsi, u32 reg)
-{
-	return readl(dsi->base + reg);
-}
-
-static void dw_mipi_dsi_phy_write(struct dw_mipi_dsi *dsi, u8 test_code,
-				  u8 test_data)
-{
-	/*
-	 * With the falling edge on TESTCLK, the TESTDIN[7:0] signal content
-	 * is latched internally as the current test code. Test data is
-	 * programmed internally by rising edge on TESTCLK.
-	 */
-	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
-
-	dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_TESTEN | PHY_TESTDOUT(0) |
-					  PHY_TESTDIN(test_code));
-
-	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLK | PHY_UNTESTCLR);
-
-	dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_UNTESTEN | PHY_TESTDOUT(0) |
-					  PHY_TESTDIN(test_data));
-
-	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
-}
-
-/**
- * ns2bc - Nanoseconds to byte clock cycles
- */
-static inline unsigned int ns2bc(struct dw_mipi_dsi *dsi, int ns)
-{
-	return DIV_ROUND_UP(ns * dsi->lane_mbps / 8, 1000);
-}
-
-/**
- * ns2ui - Nanoseconds to UI time periods
- */
-static inline unsigned int ns2ui(struct dw_mipi_dsi *dsi, int ns)
-{
-	return DIV_ROUND_UP(ns * dsi->lane_mbps, 1000);
-}
-
-static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
-{
-	int ret, testdin, vco, val;
-
-	vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;
-
-	testdin = max_mbps_to_testdin(dsi->lane_mbps);
-	if (testdin < 0) {
-		DRM_DEV_ERROR(dsi->dev,
-			      "failed to get testdin for %dmbps lane clock\n",
-			      dsi->lane_mbps);
-		return testdin;
-	}
-
-	/* Start by clearing PHY state */
-	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
-	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLR);
-	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
-
-	ret = clk_prepare_enable(dsi->phy_cfg_clk);
-	if (ret) {
-		DRM_DEV_ERROR(dsi->dev, "Failed to enable phy_cfg_clk\n");
-		return ret;
-	}
-
-	dw_mipi_dsi_phy_write(dsi, 0x10, BYPASS_VCO_RANGE |
-					 VCO_RANGE_CON_SEL(vco) |
-					 VCO_IN_CAP_CON_LOW |
-					 REF_BIAS_CUR_SEL);
-
-	dw_mipi_dsi_phy_write(dsi, 0x11, CP_CURRENT_3MA);
-	dw_mipi_dsi_phy_write(dsi, 0x12, CP_PROGRAM_EN | LPF_PROGRAM_EN |
-					 LPF_RESISTORS_20_KOHM);
-
-	dw_mipi_dsi_phy_write(dsi, 0x44, HSFREQRANGE_SEL(testdin));
-
-	dw_mipi_dsi_phy_write(dsi, 0x17, INPUT_DIVIDER(dsi->input_div));
-	dw_mipi_dsi_phy_write(dsi, 0x18, LOOP_DIV_LOW_SEL(dsi->feedback_div) |
-					 LOW_PROGRAM_EN);
-	dw_mipi_dsi_phy_write(dsi, 0x18, LOOP_DIV_HIGH_SEL(dsi->feedback_div) |
-					 HIGH_PROGRAM_EN);
-	dw_mipi_dsi_phy_write(dsi, 0x19, PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
-
-	dw_mipi_dsi_phy_write(dsi, 0x22, LOW_PROGRAM_EN |
-					 BIASEXTR_SEL(BIASEXTR_127_7));
-	dw_mipi_dsi_phy_write(dsi, 0x22, HIGH_PROGRAM_EN |
-					 BANDGAP_SEL(BANDGAP_96_10));
-
-	dw_mipi_dsi_phy_write(dsi, 0x20, POWER_CONTROL | INTERNAL_REG_CURRENT |
-					 BIAS_BLOCK_ON | BANDGAP_ON);
-
-	dw_mipi_dsi_phy_write(dsi, 0x21, TER_RESISTOR_LOW | TER_CAL_DONE |
-					 SETRD_MAX | TER_RESISTORS_ON);
-	dw_mipi_dsi_phy_write(dsi, 0x21, TER_RESISTOR_HIGH | LEVEL_SHIFTERS_ON |
-					 SETRD_MAX | POWER_MANAGE |
-					 TER_RESISTORS_ON);
-
-	dw_mipi_dsi_phy_write(dsi, 0x60, TLP_PROGRAM_EN | ns2bc(dsi, 500));
-	dw_mipi_dsi_phy_write(dsi, 0x61, THS_PRE_PROGRAM_EN | ns2ui(dsi, 40));
-	dw_mipi_dsi_phy_write(dsi, 0x62, THS_ZERO_PROGRAM_EN | ns2bc(dsi, 300));
-	dw_mipi_dsi_phy_write(dsi, 0x63, THS_PRE_PROGRAM_EN | ns2ui(dsi, 100));
-	dw_mipi_dsi_phy_write(dsi, 0x64, BIT(5) | ns2bc(dsi, 100));
-	dw_mipi_dsi_phy_write(dsi, 0x65, BIT(5) | (ns2bc(dsi, 60) + 7));
-
-	dw_mipi_dsi_phy_write(dsi, 0x70, TLP_PROGRAM_EN | ns2bc(dsi, 500));
-	dw_mipi_dsi_phy_write(dsi, 0x71,
-			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 50) + 5));
-	dw_mipi_dsi_phy_write(dsi, 0x72,
-			      THS_ZERO_PROGRAM_EN | (ns2bc(dsi, 140) + 2));
-	dw_mipi_dsi_phy_write(dsi, 0x73,
-			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 60) + 8));
-	dw_mipi_dsi_phy_write(dsi, 0x74, BIT(5) | ns2bc(dsi, 100));
-
-	dsi_write(dsi, DSI_PHY_RSTZ, PHY_ENFORCEPLL | PHY_ENABLECLK |
-				     PHY_UNRSTZ | PHY_UNSHUTDOWNZ);
-
-	ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
-				 val, val & LOCK, 1000, PHY_STATUS_TIMEOUT_US);
-	if (ret < 0) {
-		DRM_DEV_ERROR(dsi->dev, "failed to wait for phy lock state\n");
-		goto phy_init_end;
-	}
-
-	ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
-				 val, val & STOP_STATE_CLK_LANE, 1000,
-				 PHY_STATUS_TIMEOUT_US);
-	if (ret < 0)
-		DRM_DEV_ERROR(dsi->dev,
-			      "failed to wait for phy clk lane stop state\n");
-
-phy_init_end:
-	clk_disable_unprepare(dsi->phy_cfg_clk);
-
-	return ret;
-}
-
-static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi,
-				    struct drm_display_mode *mode)
-{
-	unsigned int i, pre;
-	unsigned long mpclk, pllref, tmp;
-	unsigned int m = 1, n = 1, target_mbps = 1000;
-	unsigned int max_mbps = dptdin_map[ARRAY_SIZE(dptdin_map) - 1].max_mbps;
-	int bpp;
-
-	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
-	if (bpp < 0) {
-		DRM_DEV_ERROR(dsi->dev,
-			      "failed to get bpp for pixel format %d\n",
-			      dsi->format);
-		return bpp;
-	}
-
-	mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC);
-	if (mpclk) {
-		/* take 1 / 0.8, since mbps must big than bandwidth of RGB */
-		tmp = mpclk * (bpp / dsi->lanes) * 10 / 8;
-		if (tmp < max_mbps)
-			target_mbps = tmp;
-		else
-			DRM_DEV_ERROR(dsi->dev,
-				      "DPHY clock frequency is out of range\n");
-	}
-
-	pllref = DIV_ROUND_UP(clk_get_rate(dsi->pllref_clk), USEC_PER_SEC);
-	tmp = pllref;
-
-	/*
-	 * The limits on the PLL divisor are:
-	 *
-	 *	5MHz <= (pllref / n) <= 40MHz
-	 *
-	 * we walk over these values in descreasing order so that if we hit
-	 * an exact match for target_mbps it is more likely that "m" will be
-	 * even.
-	 *
-	 * TODO: ensure that "m" is even after this loop.
-	 */
-	for (i = pllref / 5; i > (pllref / 40); i--) {
-		pre = pllref / i;
-		if ((tmp > (target_mbps % pre)) && (target_mbps / pre < 512)) {
-			tmp = target_mbps % pre;
-			n = i;
-			m = target_mbps / pre;
-		}
-		if (tmp == 0)
-			break;
-	}
-
-	dsi->lane_mbps = pllref / n * m;
-	dsi->input_div = n;
-	dsi->feedback_div = m;
-
-	return 0;
-}
-
-static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
-				   struct mipi_dsi_device *device)
-{
-	struct dw_mipi_dsi *dsi = host_to_dsi(host);
-
-	if (device->lanes > dsi->pdata->max_data_lanes) {
-		DRM_DEV_ERROR(dsi->dev,
-			      "the number of data lanes(%u) is too many\n",
-			      device->lanes);
-		return -EINVAL;
-	}
-
-	dsi->lanes = device->lanes;
-	dsi->channel = device->channel;
-	dsi->format = device->format;
-	dsi->mode_flags = device->mode_flags;
-	dsi->panel = of_drm_find_panel(device->dev.of_node);
-	if (dsi->panel)
-		return drm_panel_attach(dsi->panel, &dsi->connector);
-
-	return -EINVAL;
-}
-
-static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host,
-				   struct mipi_dsi_device *device)
-{
-	struct dw_mipi_dsi *dsi = host_to_dsi(host);
-
-	drm_panel_detach(dsi->panel);
-
-	return 0;
-}
-
-static void dw_mipi_message_config(struct dw_mipi_dsi *dsi,
-				   const struct mipi_dsi_msg *msg)
-{
-	bool lpm = msg->flags & MIPI_DSI_MSG_USE_LPM;
-	u32 val = 0;
-
-	if (msg->flags & MIPI_DSI_MSG_REQ_ACK)
-		val |= EN_ACK_RQST;
-	if (lpm)
-		val |= CMD_MODE_ALL_LP;
-
-	dsi_write(dsi, DSI_LPCLK_CTRL, lpm ? 0 : PHY_TXREQUESTCLKHS);
-	dsi_write(dsi, DSI_CMD_MODE_CFG, val);
-}
-
-static int dw_mipi_dsi_gen_pkt_hdr_write(struct dw_mipi_dsi *dsi, u32 hdr_val)
-{
-	int ret;
-	u32 val, mask;
-
-	ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
-				 val, !(val & GEN_CMD_FULL), 1000,
-				 CMD_PKT_STATUS_TIMEOUT_US);
-	if (ret < 0) {
-		DRM_DEV_ERROR(dsi->dev,
-			      "failed to get available command FIFO\n");
-		return ret;
-	}
-
-	dsi_write(dsi, DSI_GEN_HDR, hdr_val);
-
-	mask = GEN_CMD_EMPTY | GEN_PLD_W_EMPTY;
-	ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
-				 val, (val & mask) == mask,
-				 1000, CMD_PKT_STATUS_TIMEOUT_US);
-	if (ret < 0) {
-		DRM_DEV_ERROR(dsi->dev, "failed to write command FIFO\n");
-		return ret;
-	}
-
-	return 0;
-}
-
-static int dw_mipi_dsi_dcs_short_write(struct dw_mipi_dsi *dsi,
-				       const struct mipi_dsi_msg *msg)
-{
-	const u8 *tx_buf = msg->tx_buf;
-	u16 data = 0;
-	u32 val;
-
-	if (msg->tx_len > 0)
-		data |= tx_buf[0];
-	if (msg->tx_len > 1)
-		data |= tx_buf[1] << 8;
-
-	if (msg->tx_len > 2) {
-		DRM_DEV_ERROR(dsi->dev,
-			      "too long tx buf length %zu for short write\n",
-			      msg->tx_len);
-		return -EINVAL;
-	}
-
-	val = GEN_HDATA(data) | GEN_HTYPE(msg->type);
-	return dw_mipi_dsi_gen_pkt_hdr_write(dsi, val);
-}
-
-static int dw_mipi_dsi_dcs_long_write(struct dw_mipi_dsi *dsi,
-				      const struct mipi_dsi_msg *msg)
-{
-	const u8 *tx_buf = msg->tx_buf;
-	int len = msg->tx_len, pld_data_bytes = sizeof(u32), ret;
-	u32 hdr_val = GEN_HDATA(msg->tx_len) | GEN_HTYPE(msg->type);
-	u32 remainder;
-	u32 val;
-
-	if (msg->tx_len < 3) {
-		DRM_DEV_ERROR(dsi->dev,
-			      "wrong tx buf length %zu for long write\n",
-			      msg->tx_len);
-		return -EINVAL;
-	}
-
-	while (DIV_ROUND_UP(len, pld_data_bytes)) {
-		if (len < pld_data_bytes) {
-			remainder = 0;
-			memcpy(&remainder, tx_buf, len);
-			dsi_write(dsi, DSI_GEN_PLD_DATA, remainder);
-			len = 0;
-		} else {
-			memcpy(&remainder, tx_buf, pld_data_bytes);
-			dsi_write(dsi, DSI_GEN_PLD_DATA, remainder);
-			tx_buf += pld_data_bytes;
-			len -= pld_data_bytes;
-		}
-
-		ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
-					 val, !(val & GEN_PLD_W_FULL), 1000,
-					 CMD_PKT_STATUS_TIMEOUT_US);
-		if (ret < 0) {
-			DRM_DEV_ERROR(dsi->dev,
-				      "failed to get available write payload FIFO\n");
-			return ret;
-		}
-	}
-
-	return dw_mipi_dsi_gen_pkt_hdr_write(dsi, hdr_val);
-}
-
-static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host,
-					 const struct mipi_dsi_msg *msg)
-{
-	struct dw_mipi_dsi *dsi = host_to_dsi(host);
-	int ret;
-
-	dw_mipi_message_config(dsi, msg);
-
-	switch (msg->type) {
-	case MIPI_DSI_DCS_SHORT_WRITE:
-	case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
-	case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE:
-		ret = dw_mipi_dsi_dcs_short_write(dsi, msg);
-		break;
-	case MIPI_DSI_DCS_LONG_WRITE:
-		ret = dw_mipi_dsi_dcs_long_write(dsi, msg);
-		break;
-	default:
-		DRM_DEV_ERROR(dsi->dev, "unsupported message type 0x%02x\n",
-			      msg->type);
-		ret = -EINVAL;
-	}
-
-	return ret;
-}
-
-static const struct mipi_dsi_host_ops dw_mipi_dsi_host_ops = {
-	.attach = dw_mipi_dsi_host_attach,
-	.detach = dw_mipi_dsi_host_detach,
-	.transfer = dw_mipi_dsi_host_transfer,
-};
-
-static void dw_mipi_dsi_video_mode_config(struct dw_mipi_dsi *dsi)
-{
-	u32 val;
-
-	val = ENABLE_LOW_POWER;
-
-	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
-		val |= VID_MODE_TYPE_BURST;
-	else if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
-		val |= VID_MODE_TYPE_NON_BURST_SYNC_PULSES;
-	else
-		val |= VID_MODE_TYPE_NON_BURST_SYNC_EVENTS;
-
-	dsi_write(dsi, DSI_VID_MODE_CFG, val);
-}
-
-static void dw_mipi_dsi_set_mode(struct dw_mipi_dsi *dsi,
-				 enum dw_mipi_dsi_mode mode)
-{
-	if (mode == DW_MIPI_DSI_CMD_MODE) {
-		dsi_write(dsi, DSI_PWR_UP, RESET);
-		dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE);
-		dsi_write(dsi, DSI_PWR_UP, POWERUP);
-	} else {
-		dsi_write(dsi, DSI_PWR_UP, RESET);
-		dsi_write(dsi, DSI_MODE_CFG, ENABLE_VIDEO_MODE);
-		dw_mipi_dsi_video_mode_config(dsi);
-		dsi_write(dsi, DSI_LPCLK_CTRL, PHY_TXREQUESTCLKHS);
-		dsi_write(dsi, DSI_PWR_UP, POWERUP);
-	}
-}
-
-static void dw_mipi_dsi_disable(struct dw_mipi_dsi *dsi)
-{
-	dsi_write(dsi, DSI_PWR_UP, RESET);
-	dsi_write(dsi, DSI_PHY_RSTZ, PHY_RSTZ);
-}
-
-static void dw_mipi_dsi_init(struct dw_mipi_dsi *dsi)
-{
-	/*
-	 * The maximum permitted escape clock is 20MHz and it is derived from
-	 * lanebyteclk, which is running at "lane_mbps / 8".  Thus we want:
-	 *
-	 *     (lane_mbps >> 3) / esc_clk_division < 20
-	 * which is:
-	 *     (lane_mbps >> 3) / 20 > esc_clk_division
-	 */
-	u32 esc_clk_division = (dsi->lane_mbps >> 3) / 20 + 1;
-
-	dsi_write(dsi, DSI_PWR_UP, RESET);
-	dsi_write(dsi, DSI_PHY_RSTZ, PHY_DISFORCEPLL | PHY_DISABLECLK
-		  | PHY_RSTZ | PHY_SHUTDOWNZ);
-	dsi_write(dsi, DSI_CLKMGR_CFG, TO_CLK_DIVIDSION(10) |
-		  TX_ESC_CLK_DIVIDSION(esc_clk_division));
-}
-
-static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi,
-				   struct drm_display_mode *mode)
-{
-	u32 val = 0, color = 0;
-
-	switch (dsi->format) {
-	case MIPI_DSI_FMT_RGB888:
-		color = DPI_COLOR_CODING_24BIT;
-		break;
-	case MIPI_DSI_FMT_RGB666:
-		color = DPI_COLOR_CODING_18BIT_2 | EN18_LOOSELY;
-		break;
-	case MIPI_DSI_FMT_RGB666_PACKED:
-		color = DPI_COLOR_CODING_18BIT_1;
-		break;
-	case MIPI_DSI_FMT_RGB565:
-		color = DPI_COLOR_CODING_16BIT_1;
-		break;
-	}
-
-	if (mode->flags & DRM_MODE_FLAG_NVSYNC)
-		val |= VSYNC_ACTIVE_LOW;
-	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
-		val |= HSYNC_ACTIVE_LOW;
-
-	dsi_write(dsi, DSI_DPI_VCID, DPI_VID(dsi->channel));
-	dsi_write(dsi, DSI_DPI_COLOR_CODING, color);
-	dsi_write(dsi, DSI_DPI_CFG_POL, val);
-	dsi_write(dsi, DSI_DPI_LP_CMD_TIM, OUTVACT_LPCMD_TIME(4)
-		  | INVACT_LPCMD_TIME(4));
-}
-
-static void dw_mipi_dsi_packet_handler_config(struct dw_mipi_dsi *dsi)
-{
-	dsi_write(dsi, DSI_PCKHDL_CFG, EN_CRC_RX | EN_ECC_RX | EN_BTA);
-}
-
-static void dw_mipi_dsi_video_packet_config(struct dw_mipi_dsi *dsi,
-					    struct drm_display_mode *mode)
-{
-	dsi_write(dsi, DSI_VID_PKT_SIZE, VID_PKT_SIZE(mode->hdisplay));
-}
-
-static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi)
-{
-	dsi_write(dsi, DSI_TO_CNT_CFG, HSTX_TO_CNT(1000) | LPRX_TO_CNT(1000));
-	dsi_write(dsi, DSI_BTA_TO_CNT, 0xd00);
-	dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE);
-}
-
-/* Get lane byte clock cycles. */
-static u32 dw_mipi_dsi_get_hcomponent_lbcc(struct dw_mipi_dsi *dsi,
-					   struct drm_display_mode *mode,
-					   u32 hcomponent)
-{
-	u32 frac, lbcc;
-
-	lbcc = hcomponent * dsi->lane_mbps * MSEC_PER_SEC / 8;
-
-	frac = lbcc % mode->clock;
-	lbcc = lbcc / mode->clock;
-	if (frac)
-		lbcc++;
-
-	return lbcc;
-}
-
-static void dw_mipi_dsi_line_timer_config(struct dw_mipi_dsi *dsi,
-					  struct drm_display_mode *mode)
-{
-	u32 htotal, hsa, hbp, lbcc;
-
-	htotal = mode->htotal;
-	hsa = mode->hsync_end - mode->hsync_start;
-	hbp = mode->htotal - mode->hsync_end;
-
-	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, htotal);
-	dsi_write(dsi, DSI_VID_HLINE_TIME, lbcc);
-
-	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, hsa);
-	dsi_write(dsi, DSI_VID_HSA_TIME, lbcc);
-
-	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, hbp);
-	dsi_write(dsi, DSI_VID_HBP_TIME, lbcc);
-}
-
-static void dw_mipi_dsi_vertical_timing_config(struct dw_mipi_dsi *dsi,
-					       struct drm_display_mode *mode)
-{
-	u32 vactive, vsa, vfp, vbp;
-
-	vactive = mode->vdisplay;
-	vsa = mode->vsync_end - mode->vsync_start;
-	vfp = mode->vsync_start - mode->vdisplay;
-	vbp = mode->vtotal - mode->vsync_end;
-
-	dsi_write(dsi, DSI_VID_VACTIVE_LINES, vactive);
-	dsi_write(dsi, DSI_VID_VSA_LINES, vsa);
-	dsi_write(dsi, DSI_VID_VFP_LINES, vfp);
-	dsi_write(dsi, DSI_VID_VBP_LINES, vbp);
-}
-
-static void dw_mipi_dsi_dphy_timing_config(struct dw_mipi_dsi *dsi)
-{
-	dsi_write(dsi, DSI_PHY_TMR_CFG, PHY_HS2LP_TIME(0x40)
-		  | PHY_LP2HS_TIME(0x40) | MAX_RD_TIME(10000));
-
-	dsi_write(dsi, DSI_PHY_TMR_LPCLK_CFG, PHY_CLKHS2LP_TIME(0x40)
-		  | PHY_CLKLP2HS_TIME(0x40));
-}
-
-static void dw_mipi_dsi_dphy_interface_config(struct dw_mipi_dsi *dsi)
-{
-	dsi_write(dsi, DSI_PHY_IF_CFG, PHY_STOP_WAIT_TIME(0x20) |
-		  N_LANES(dsi->lanes));
-}
-
-static void dw_mipi_dsi_clear_err(struct dw_mipi_dsi *dsi)
-{
-	dsi_read(dsi, DSI_INT_ST0);
-	dsi_read(dsi, DSI_INT_ST1);
-	dsi_write(dsi, DSI_INT_MSK0, 0);
-	dsi_write(dsi, DSI_INT_MSK1, 0);
-}
-
-static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
-{
-	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
-
-	if (dsi->dpms_mode != DRM_MODE_DPMS_ON)
-		return;
-
-	if (clk_prepare_enable(dsi->pclk)) {
-		DRM_DEV_ERROR(dsi->dev, "Failed to enable pclk\n");
-		return;
-	}
-
-	drm_panel_disable(dsi->panel);
-
-	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_CMD_MODE);
-	drm_panel_unprepare(dsi->panel);
-
-	dw_mipi_dsi_disable(dsi);
-	pm_runtime_put(dsi->dev);
-	clk_disable_unprepare(dsi->pclk);
-	dsi->dpms_mode = DRM_MODE_DPMS_OFF;
-}
-
-static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
-{
-	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
-	struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
-	const struct dw_mipi_dsi_plat_data *pdata = dsi->pdata;
-	int mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node, encoder);
-	u32 val;
-	int ret;
-
-	ret = dw_mipi_dsi_get_lane_bps(dsi, mode);
-	if (ret < 0)
-		return;
-
-	if (dsi->dpms_mode == DRM_MODE_DPMS_ON)
-		return;
-
-	if (clk_prepare_enable(dsi->pclk)) {
-		DRM_DEV_ERROR(dsi->dev, "Failed to enable pclk\n");
-		return;
-	}
-
-	pm_runtime_get_sync(dsi->dev);
-	dw_mipi_dsi_init(dsi);
-	dw_mipi_dsi_dpi_config(dsi, mode);
-	dw_mipi_dsi_packet_handler_config(dsi);
-	dw_mipi_dsi_video_mode_config(dsi);
-	dw_mipi_dsi_video_packet_config(dsi, mode);
-	dw_mipi_dsi_command_mode_config(dsi);
-	dw_mipi_dsi_line_timer_config(dsi, mode);
-	dw_mipi_dsi_vertical_timing_config(dsi, mode);
-	dw_mipi_dsi_dphy_timing_config(dsi);
-	dw_mipi_dsi_dphy_interface_config(dsi);
-	dw_mipi_dsi_clear_err(dsi);
-
-	/*
-	 * For the RK3399, the clk of grf must be enabled before writing grf
-	 * register. And for RK3288 or other soc, this grf_clk must be NULL,
-	 * the clk_prepare_enable return true directly.
-	 */
-	ret = clk_prepare_enable(dsi->grf_clk);
-	if (ret) {
-		DRM_DEV_ERROR(dsi->dev, "Failed to enable grf_clk: %d\n", ret);
-		return;
-	}
-
-	if (pdata->grf_dsi0_mode_reg)
-		regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
-			     pdata->grf_dsi0_mode);
-
-	dw_mipi_dsi_phy_init(dsi);
-	dw_mipi_dsi_wait_for_two_frames(mode);
-
-	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_CMD_MODE);
-	if (drm_panel_prepare(dsi->panel))
-		DRM_DEV_ERROR(dsi->dev, "failed to prepare panel\n");
-
-	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_VID_MODE);
-	drm_panel_enable(dsi->panel);
-
-	clk_disable_unprepare(dsi->pclk);
-
-	if (mux)
-		val = pdata->dsi0_en_bit | (pdata->dsi0_en_bit << 16);
-	else
-		val = pdata->dsi0_en_bit << 16;
-
-	regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
-	DRM_DEV_DEBUG(dsi->dev,
-		      "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG");
-	dsi->dpms_mode = DRM_MODE_DPMS_ON;
-
-	clk_disable_unprepare(dsi->grf_clk);
-}
-
-static int
-dw_mipi_dsi_encoder_atomic_check(struct drm_encoder *encoder,
-				 struct drm_crtc_state *crtc_state,
-				 struct drm_connector_state *conn_state)
-{
-	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
-	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
-
-	switch (dsi->format) {
-	case MIPI_DSI_FMT_RGB888:
-		s->output_mode = ROCKCHIP_OUT_MODE_P888;
-		break;
-	case MIPI_DSI_FMT_RGB666:
-		s->output_mode = ROCKCHIP_OUT_MODE_P666;
-		break;
-	case MIPI_DSI_FMT_RGB565:
-		s->output_mode = ROCKCHIP_OUT_MODE_P565;
-		break;
-	default:
-		WARN_ON(1);
-		return -EINVAL;
-	}
-
-	s->output_type = DRM_MODE_CONNECTOR_DSI;
-
-	return 0;
-}
-
-static const struct drm_encoder_helper_funcs
-dw_mipi_dsi_encoder_helper_funcs = {
-	.enable = dw_mipi_dsi_encoder_enable,
-	.disable = dw_mipi_dsi_encoder_disable,
-	.atomic_check = dw_mipi_dsi_encoder_atomic_check,
-};
-
-static const struct drm_encoder_funcs dw_mipi_dsi_encoder_funcs = {
-	.destroy = drm_encoder_cleanup,
-};
-
-static int dw_mipi_dsi_connector_get_modes(struct drm_connector *connector)
-{
-	struct dw_mipi_dsi *dsi = con_to_dsi(connector);
-
-	return drm_panel_get_modes(dsi->panel);
-}
-
-static struct drm_connector_helper_funcs dw_mipi_dsi_connector_helper_funcs = {
-	.get_modes = dw_mipi_dsi_connector_get_modes,
-};
-
-static void dw_mipi_dsi_drm_connector_destroy(struct drm_connector *connector)
-{
-	drm_connector_unregister(connector);
-	drm_connector_cleanup(connector);
-}
-
-static const struct drm_connector_funcs dw_mipi_dsi_atomic_connector_funcs = {
-	.fill_modes = drm_helper_probe_single_connector_modes,
-	.destroy = dw_mipi_dsi_drm_connector_destroy,
-	.reset = drm_atomic_helper_connector_reset,
-	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
-	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-static int dw_mipi_dsi_register(struct drm_device *drm,
-				struct dw_mipi_dsi *dsi)
-{
-	struct drm_encoder *encoder = &dsi->encoder;
-	struct drm_connector *connector = &dsi->connector;
-	struct device *dev = dsi->dev;
-	int ret;
-
-	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm,
-							     dev->of_node);
-	/*
-	 * If we failed to find the CRTC(s) which this encoder is
-	 * supposed to be connected to, it's because the CRTC has
-	 * not been registered yet.  Defer probing, and hope that
-	 * the required CRTC is added later.
-	 */
-	if (encoder->possible_crtcs == 0)
-		return -EPROBE_DEFER;
-
-	drm_encoder_helper_add(&dsi->encoder,
-			       &dw_mipi_dsi_encoder_helper_funcs);
-	ret = drm_encoder_init(drm, &dsi->encoder, &dw_mipi_dsi_encoder_funcs,
-			       DRM_MODE_ENCODER_DSI, NULL);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "Failed to initialize encoder with drm\n");
-		return ret;
-	}
-
-	drm_connector_helper_add(connector,
-				 &dw_mipi_dsi_connector_helper_funcs);
-
-	drm_connector_init(drm, &dsi->connector,
-			   &dw_mipi_dsi_atomic_connector_funcs,
-			   DRM_MODE_CONNECTOR_DSI);
-
-	drm_mode_connector_attach_encoder(connector, encoder);
-
-	return 0;
-}
-
-static int rockchip_mipi_parse_dt(struct dw_mipi_dsi *dsi)
-{
-	struct device_node *np = dsi->dev->of_node;
-
-	dsi->grf_regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
-	if (IS_ERR(dsi->grf_regmap)) {
-		DRM_DEV_ERROR(dsi->dev, "Unable to get rockchip,grf\n");
-		return PTR_ERR(dsi->grf_regmap);
-	}
-
-	return 0;
-}
-
-static struct dw_mipi_dsi_plat_data rk3288_mipi_dsi_drv_data = {
-	.dsi0_en_bit = RK3288_DSI0_SEL_VOP_LIT,
-	.dsi1_en_bit = RK3288_DSI1_SEL_VOP_LIT,
-	.grf_switch_reg = RK3288_GRF_SOC_CON6,
-	.max_data_lanes = 4,
-};
-
-static struct dw_mipi_dsi_plat_data rk3399_mipi_dsi_drv_data = {
-	.dsi0_en_bit = RK3399_DSI0_SEL_VOP_LIT,
-	.dsi1_en_bit = RK3399_DSI1_SEL_VOP_LIT,
-	.grf_switch_reg = RK3399_GRF_SOC_CON20,
-	.grf_dsi0_mode = RK3399_GRF_DSI_MODE,
-	.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
-	.flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK,
-	.max_data_lanes = 4,
-};
-
-static const struct of_device_id dw_mipi_dsi_dt_ids[] = {
-	{
-	 .compatible = "rockchip,rk3288-mipi-dsi",
-	 .data = &rk3288_mipi_dsi_drv_data,
-	}, {
-	 .compatible = "rockchip,rk3399-mipi-dsi",
-	 .data = &rk3399_mipi_dsi_drv_data,
-	},
-	{ /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, dw_mipi_dsi_dt_ids);
-
-static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
-			    void *data)
-{
-	const struct of_device_id *of_id =
-			of_match_device(dw_mipi_dsi_dt_ids, dev);
-	const struct dw_mipi_dsi_plat_data *pdata = of_id->data;
-	struct platform_device *pdev = to_platform_device(dev);
-	struct reset_control *apb_rst;
-	struct drm_device *drm = data;
-	struct dw_mipi_dsi *dsi;
-	struct resource *res;
-	int ret;
-
-	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
-	if (!dsi)
-		return -ENOMEM;
-
-	dsi->dev = dev;
-	dsi->pdata = pdata;
-	dsi->dpms_mode = DRM_MODE_DPMS_OFF;
-
-	ret = rockchip_mipi_parse_dt(dsi);
-	if (ret)
-		return ret;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENODEV;
-
-	dsi->base = devm_ioremap_resource(dev, res);
-	if (IS_ERR(dsi->base))
-		return PTR_ERR(dsi->base);
-
-	dsi->pllref_clk = devm_clk_get(dev, "ref");
-	if (IS_ERR(dsi->pllref_clk)) {
-		ret = PTR_ERR(dsi->pllref_clk);
-		DRM_DEV_ERROR(dev,
-			      "Unable to get pll reference clock: %d\n", ret);
-		return ret;
-	}
-
-	dsi->pclk = devm_clk_get(dev, "pclk");
-	if (IS_ERR(dsi->pclk)) {
-		ret = PTR_ERR(dsi->pclk);
-		DRM_DEV_ERROR(dev, "Unable to get pclk: %d\n", ret);
-		return ret;
-	}
-
-	/*
-	 * Note that the reset was not defined in the initial device tree, so
-	 * we have to be prepared for it not being found.
-	 */
-	apb_rst = devm_reset_control_get(dev, "apb");
-	if (IS_ERR(apb_rst)) {
-		ret = PTR_ERR(apb_rst);
-		if (ret == -ENOENT) {
-			apb_rst = NULL;
-		} else {
-			DRM_DEV_ERROR(dev,
-				      "Unable to get reset control: %d\n", ret);
-			return ret;
-		}
-	}
-
-	if (apb_rst) {
-		ret = clk_prepare_enable(dsi->pclk);
-		if (ret) {
-			DRM_DEV_ERROR(dev, "Failed to enable pclk\n");
-			return ret;
-		}
-
-		reset_control_assert(apb_rst);
-		usleep_range(10, 20);
-		reset_control_deassert(apb_rst);
-
-		clk_disable_unprepare(dsi->pclk);
-	}
-
-	if (pdata->flags & DW_MIPI_NEEDS_PHY_CFG_CLK) {
-		dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
-		if (IS_ERR(dsi->phy_cfg_clk)) {
-			ret = PTR_ERR(dsi->phy_cfg_clk);
-			DRM_DEV_ERROR(dev,
-				      "Unable to get phy_cfg_clk: %d\n", ret);
-			return ret;
-		}
-	}
-
-	if (pdata->flags & DW_MIPI_NEEDS_GRF_CLK) {
-		dsi->grf_clk = devm_clk_get(dev, "grf");
-		if (IS_ERR(dsi->grf_clk)) {
-			ret = PTR_ERR(dsi->grf_clk);
-			DRM_DEV_ERROR(dev, "Unable to get grf_clk: %d\n", ret);
-			return ret;
-		}
-	}
-
-	ret = clk_prepare_enable(dsi->pllref_clk);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "Failed to enable pllref_clk\n");
-		return ret;
-	}
-
-	ret = dw_mipi_dsi_register(drm, dsi);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "Failed to register mipi_dsi: %d\n", ret);
-		goto err_pllref;
-	}
-
-	pm_runtime_enable(dev);
-
-	dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
-	dsi->dsi_host.dev = dev;
-	ret = mipi_dsi_host_register(&dsi->dsi_host);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "Failed to register MIPI host: %d\n", ret);
-		goto err_cleanup;
-	}
-
-	if (!dsi->panel) {
-		ret = -EPROBE_DEFER;
-		goto err_mipi_dsi_host;
-	}
-
-	dev_set_drvdata(dev, dsi);
-	return 0;
-
-err_mipi_dsi_host:
-	mipi_dsi_host_unregister(&dsi->dsi_host);
-err_cleanup:
-	drm_encoder_cleanup(&dsi->encoder);
-	drm_connector_cleanup(&dsi->connector);
-err_pllref:
-	clk_disable_unprepare(dsi->pllref_clk);
-	return ret;
-}
-
-static void dw_mipi_dsi_unbind(struct device *dev, struct device *master,
-			       void *data)
-{
-	struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
-
-	mipi_dsi_host_unregister(&dsi->dsi_host);
-	pm_runtime_disable(dev);
-	clk_disable_unprepare(dsi->pllref_clk);
-}
-
-static const struct component_ops dw_mipi_dsi_ops = {
-	.bind	= dw_mipi_dsi_bind,
-	.unbind	= dw_mipi_dsi_unbind,
-};
-
-static int dw_mipi_dsi_probe(struct platform_device *pdev)
-{
-	return component_add(&pdev->dev, &dw_mipi_dsi_ops);
-}
-
-static int dw_mipi_dsi_remove(struct platform_device *pdev)
-{
-	component_del(&pdev->dev, &dw_mipi_dsi_ops);
-	return 0;
-}
-
-struct platform_driver dw_mipi_dsi_driver = {
-	.probe		= dw_mipi_dsi_probe,
-	.remove		= dw_mipi_dsi_remove,
-	.driver		= {
-		.of_match_table = dw_mipi_dsi_dt_ids,
-		.name	= DRIVER_NAME,
-	},
-};
diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
new file mode 100644
index 0000000..c682ed2
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
@@ -0,0 +1,764 @@
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author:
+ *      Chris Zhong <zyw@rock-chips.com>
+ *      Nickey Yang <nickey.yang@rock-chips.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * License terms:  GNU General Public License (GPL), version 2
+ */
+
+#include <linux/clk.h>
+#include <linux/iopoll.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <drm/drmP.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/bridge/dw_mipi_dsi.h>
+#include <video/mipi_display.h>
+#include <linux/regmap.h>
+#include <drm/drm_of.h>
+#include <linux/mfd/syscon.h>
+
+#include "rockchip_drm_drv.h"
+#include "rockchip_drm_vop.h"
+
+#define DSI_PHY_TST_CTRL0		0xb4
+#define PHY_TESTCLK			BIT(1)
+#define PHY_UNTESTCLK			0
+#define PHY_TESTCLR			BIT(0)
+#define PHY_UNTESTCLR			0
+
+#define DSI_PHY_TST_CTRL1		0xb8
+#define PHY_TESTEN			BIT(16)
+#define PHY_UNTESTEN			0
+#define PHY_TESTDOUT(n)			(((n) & 0xff) << 8)
+#define PHY_TESTDIN(n)			(((n) & 0xff) << 0)
+
+#define BYPASS_VCO_RANGE	BIT(7)
+#define VCO_RANGE_CON_SEL(val)	(((val) & 0x7) << 3)
+#define VCO_IN_CAP_CON_DEFAULT	(0x0 << 1)
+#define VCO_IN_CAP_CON_LOW	(0x1 << 1)
+#define VCO_IN_CAP_CON_HIGH	(0x2 << 1)
+#define REF_BIAS_CUR_SEL	BIT(0)
+
+#define CP_CURRENT_3UA	0x1
+#define CP_CURRENT_4_5UA	0x2
+#define CP_CURRENT_7_5UA	0x6
+#define CP_CURRENT_6UA	0x9
+#define CP_CURRENT_12UA	0xb
+#define CP_CURRENT_SEL(val)	((val) & 0xf)
+#define CP_PROGRAM_EN		BIT(7)
+
+#define LPF_RESISTORS_15_5KOHM	0x1
+#define LPF_RESISTORS_13KOHM	0x2
+#define LPF_RESISTORS_11_5KOHM	0x4
+#define LPF_RESISTORS_10_5KOHM	0x8
+#define LPF_RESISTORS_8KOHM	0x10
+#define LPF_PROGRAM_EN		BIT(6)
+#define LPF_RESISTORS_SEL(val)	((val) & 0x3f)
+
+#define HSFREQRANGE_SEL(val)	(((val) & 0x3f) << 1)
+
+#define INPUT_DIVIDER(val)	(((val) - 1) & 0x7f)
+#define LOW_PROGRAM_EN		0
+#define HIGH_PROGRAM_EN		BIT(7)
+#define LOOP_DIV_LOW_SEL(val)	(((val) - 1) & 0x1f)
+#define LOOP_DIV_HIGH_SEL(val)	((((val) - 1) >> 5) & 0xf)
+#define PLL_LOOP_DIV_EN		BIT(5)
+#define PLL_INPUT_DIV_EN	BIT(4)
+
+#define POWER_CONTROL		BIT(6)
+#define INTERNAL_REG_CURRENT	BIT(3)
+#define BIAS_BLOCK_ON		BIT(2)
+#define BANDGAP_ON		BIT(0)
+
+#define TER_RESISTOR_HIGH	BIT(7)
+#define	TER_RESISTOR_LOW	0
+#define LEVEL_SHIFTERS_ON	BIT(6)
+#define TER_CAL_DONE		BIT(5)
+#define SETRD_MAX		(0x7 << 2)
+#define POWER_MANAGE		BIT(1)
+#define TER_RESISTORS_ON	BIT(0)
+
+#define BIASEXTR_SEL(val)	((val) & 0x7)
+#define BANDGAP_SEL(val)	((val) & 0x7)
+#define TLP_PROGRAM_EN		BIT(7)
+#define THS_PRE_PROGRAM_EN	BIT(7)
+#define THS_ZERO_PROGRAM_EN	BIT(6)
+
+#define PLL_BIAS_CUR_SEL_CAP_VCO_CONTROL	0x10
+#define PLL_CP_CONTROL_PLL_LOCK_BYPASS	0x11
+#define PLL_LPF_AND_CP_CONTROL	0x12
+#define PLL_INPUT_DIVIDER_RATIO	0x17
+#define PLL_LOOP_DIVIDER_RATIO	0x18
+#define PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL	0x19
+#define BANDGAP_AND_BIAS_CONTROL	0x20
+#define TERMINATION_RESISTER_CONTROL	0x21
+#define AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY	0x22
+#define HS_RX_CONTROL_OF_LANE_0	0x44
+#define HS_TX_CLOCK_LANE_REQUEST_STATE_TIME_CONTROL	0x60
+#define HS_TX_CLOCK_LANE_PREPARE_STATE_TIME_CONTROL	0x61
+#define HS_TX_CLOCK_LANE_HS_ZERO_STATE_TIME_CONTROL	0x62
+#define HS_TX_CLOCK_LANE_TRAIL_STATE_TIME_CONTROL	0x63
+#define HS_TX_CLOCK_LANE_EXIT_STATE_TIME_CONTROL	0x64
+#define HS_TX_CLOCK_LANE_POST_TIME_CONTROL	0x65
+#define HS_TX_DATA_LANE_REQUEST_STATE_TIME_CONTROL	0x70
+#define HS_TX_DATA_LANE_PREPARE_STATE_TIME_CONTROL	0x71
+#define HS_TX_DATA_LANE_HS_ZERO_STATE_TIME_CONTROL	0x72
+#define HS_TX_DATA_LANE_TRAIL_STATE_TIME_CONTROL	0x73
+#define HS_TX_DATA_LANE_EXIT_STATE_TIME_CONTROL	0x74
+
+#define DW_MIPI_NEEDS_PHY_CFG_CLK	BIT(0)
+#define DW_MIPI_NEEDS_GRF_CLK		BIT(1)
+
+#define RK3288_GRF_SOC_CON6		0x025c
+#define RK3288_DSI0_SEL_VOP_LIT		BIT(6)
+#define RK3288_DSI1_SEL_VOP_LIT		BIT(9)
+
+#define RK3399_GRF_SOC_CON20		0x6250
+#define RK3399_DSI0_SEL_VOP_LIT		BIT(0)
+#define RK3399_DSI1_SEL_VOP_LIT		BIT(4)
+
+/* disable turnrequest, turndisable, forcetxstopmode, forcerxmode */
+#define RK3399_GRF_SOC_CON22		0x6258
+#define RK3399_GRF_DSI_MODE		0xffff0000
+
+#define to_dsi(nm)	container_of(nm, struct dw_mipi_dsi_rockchip, nm)
+
+enum {
+	BANDGAP_97_07,
+	BANDGAP_98_05,
+	BANDGAP_99_02,
+	BANDGAP_100_00,
+	BANDGAP_93_17,
+	BANDGAP_94_15,
+	BANDGAP_95_12,
+	BANDGAP_96_10,
+};
+
+enum {
+	BIASEXTR_87_1,
+	BIASEXTR_91_5,
+	BIASEXTR_95_9,
+	BIASEXTR_100,
+	BIASEXTR_105_94,
+	BIASEXTR_111_88,
+	BIASEXTR_118_8,
+	BIASEXTR_127_7,
+};
+
+struct rockchip_dw_dsi_chip_data {
+	u32 dsi0_en_bit;
+	u32 dsi1_en_bit;
+	u32 grf_switch_reg;
+	u32 grf_dsi0_mode;
+	u32 grf_dsi0_mode_reg;
+	unsigned int flags;
+	unsigned int max_data_lanes;
+};
+
+struct dw_mipi_dsi_rockchip {
+	struct device *dev;
+	struct drm_encoder encoder;
+	void __iomem *base;
+
+	struct regmap *grf_regmap;
+	struct clk *pllref_clk;
+	struct clk *grf_clk;
+	struct clk *phy_cfg_clk;
+
+	unsigned int lane_mbps; /* per lane */
+	u16 input_div;
+	u16 feedback_div;
+	u32 format;
+
+	struct dw_mipi_dsi *dmd;
+	const struct rockchip_dw_dsi_chip_data *cdata;
+	struct dw_mipi_dsi_plat_data pdata;
+};
+
+struct dphy_pll_parameter_map {
+	unsigned int max_mbps;
+	u8 hsfreqrange;
+	u8 icpctrl;
+	u8 lpfctrl;
+};
+
+/* The table is based on 27MHz DPHY pll reference clock. */
+static const struct dphy_pll_parameter_map dppa_map[] = {
+	{  89, 0x00, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
+	{  99, 0x10, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
+	{ 109, 0x20, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
+	{ 129, 0x01, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
+	{ 139, 0x11, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
+	{ 149, 0x21, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
+	{ 169, 0x02, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
+	{ 179, 0x12, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
+	{ 199, 0x22, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
+	{ 219, 0x03, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
+	{ 239, 0x13, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
+	{ 249, 0x23, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
+	{ 269, 0x04, CP_CURRENT_6UA, LPF_RESISTORS_11_5KOHM },
+	{ 299, 0x14, CP_CURRENT_6UA, LPF_RESISTORS_11_5KOHM },
+	{ 329, 0x05, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
+	{ 359, 0x15, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
+	{ 399, 0x25, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
+	{ 449, 0x06, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 499, 0x16, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 549, 0x07, CP_CURRENT_7_5UA, LPF_RESISTORS_10_5KOHM },
+	{ 599, 0x17, CP_CURRENT_7_5UA, LPF_RESISTORS_10_5KOHM },
+	{ 649, 0x08, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 699, 0x18, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 749, 0x09, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 799, 0x19, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 849, 0x29, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 899, 0x39, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 949, 0x0a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
+	{ 999, 0x1a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
+	{1049, 0x2a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
+	{1099, 0x3a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
+	{1149, 0x0b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
+	{1199, 0x1b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
+	{1249, 0x2b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
+	{1299, 0x3b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
+	{1349, 0x0c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
+	{1399, 0x1c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
+	{1449, 0x2c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
+	{1500, 0x3c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM }
+};
+
+static int max_mbps_to_parameter(unsigned int max_mbps)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(dppa_map); i++)
+		if (dppa_map[i].max_mbps >= max_mbps)
+			return i;
+
+	return -EINVAL;
+}
+
+static inline void dsi_write(struct dw_mipi_dsi_rockchip *dsi, u32 reg, u32 val)
+{
+	writel(val, dsi->base + reg);
+}
+
+static inline u32 dsi_read(struct dw_mipi_dsi_rockchip *dsi, u32 reg)
+{
+	return readl(dsi->base + reg);
+}
+
+static inline void dsi_set(struct dw_mipi_dsi_rockchip *dsi, u32 reg, u32 mask)
+{
+	dsi_write(dsi, reg, dsi_read(dsi, reg) | mask);
+}
+
+static inline void dsi_update_bits(struct dw_mipi_dsi_rockchip *dsi, u32 reg,
+				   u32 mask, u32 val)
+{
+	dsi_write(dsi, reg, (dsi_read(dsi, reg) & ~mask) | val);
+}
+
+static void dw_mipi_dsi_phy_write(struct dw_mipi_dsi_rockchip *dsi,
+				  u8 test_code,
+				  u8 test_data)
+{
+	/*
+	 * With the falling edge on TESTCLK, the TESTDIN[7:0] signal content
+	 * is latched internally as the current test code. Test data is
+	 * programmed internally by rising edge on TESTCLK.
+	 */
+	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
+
+	dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_TESTEN | PHY_TESTDOUT(0) |
+					  PHY_TESTDIN(test_code));
+
+	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLK | PHY_UNTESTCLR);
+
+	dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_UNTESTEN | PHY_TESTDOUT(0) |
+					  PHY_TESTDIN(test_data));
+
+	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
+}
+
+/**
+ * ns2bc - Nanoseconds to byte clock cycles
+ */
+static inline unsigned int ns2bc(struct dw_mipi_dsi_rockchip *dsi, int ns)
+{
+	return DIV_ROUND_UP(ns * dsi->lane_mbps / 8, 1000);
+}
+
+/**
+ * ns2ui - Nanoseconds to UI time periods
+ */
+static inline unsigned int ns2ui(struct dw_mipi_dsi_rockchip *dsi, int ns)
+{
+	return DIV_ROUND_UP(ns * dsi->lane_mbps, 1000);
+}
+
+static int dw_mipi_dsi_phy_init(void *priv_data)
+{
+	struct dw_mipi_dsi_rockchip *dsi = priv_data;
+	int ret, i, vco;
+
+	vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;
+
+	i = max_mbps_to_parameter(dsi->lane_mbps);
+	if (i < 0) {
+		DRM_DEV_ERROR(dsi->dev,
+			      "failed to get parameter for %dmbps clock\n",
+			      dsi->lane_mbps);
+		return i;
+	}
+
+	ret = clk_prepare_enable(dsi->phy_cfg_clk);
+	if (ret) {
+		DRM_DEV_ERROR(dsi->dev, "Failed to enable phy_cfg_clk\n");
+		return ret;
+	}
+
+	dw_mipi_dsi_phy_write(dsi, PLL_BIAS_CUR_SEL_CAP_VCO_CONTROL,
+			      BYPASS_VCO_RANGE |
+			      VCO_RANGE_CON_SEL(vco) |
+			      VCO_IN_CAP_CON_LOW |
+			      REF_BIAS_CUR_SEL);
+
+	dw_mipi_dsi_phy_write(dsi, PLL_CP_CONTROL_PLL_LOCK_BYPASS,
+			      CP_CURRENT_SEL(dppa_map[i].icpctrl));
+	dw_mipi_dsi_phy_write(dsi, PLL_LPF_AND_CP_CONTROL,
+			      CP_PROGRAM_EN | LPF_PROGRAM_EN |
+			      LPF_RESISTORS_SEL(dppa_map[i].lpfctrl));
+
+	dw_mipi_dsi_phy_write(dsi, HS_RX_CONTROL_OF_LANE_0,
+			      HSFREQRANGE_SEL(dppa_map[i].hsfreqrange));
+
+	dw_mipi_dsi_phy_write(dsi, PLL_INPUT_DIVIDER_RATIO,
+			      INPUT_DIVIDER(dsi->input_div));
+	dw_mipi_dsi_phy_write(dsi, PLL_LOOP_DIVIDER_RATIO,
+			      LOOP_DIV_LOW_SEL(dsi->feedback_div) |
+			      LOW_PROGRAM_EN);
+	/*
+	 * We need set PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL immediately
+	 * to make the configured LSB effective according to IP simulation
+	 * and lab test results.
+	 * Only in this way can we get correct mipi phy pll frequency.
+	 */
+	dw_mipi_dsi_phy_write(dsi, PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL,
+			      PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
+	dw_mipi_dsi_phy_write(dsi, PLL_LOOP_DIVIDER_RATIO,
+			      LOOP_DIV_HIGH_SEL(dsi->feedback_div) |
+			      HIGH_PROGRAM_EN);
+	dw_mipi_dsi_phy_write(dsi, PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL,
+			      PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
+
+	dw_mipi_dsi_phy_write(dsi, AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY,
+			      LOW_PROGRAM_EN | BIASEXTR_SEL(BIASEXTR_127_7));
+	dw_mipi_dsi_phy_write(dsi, AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY,
+			      HIGH_PROGRAM_EN | BANDGAP_SEL(BANDGAP_96_10));
+
+	dw_mipi_dsi_phy_write(dsi, BANDGAP_AND_BIAS_CONTROL,
+			      POWER_CONTROL | INTERNAL_REG_CURRENT |
+			      BIAS_BLOCK_ON | BANDGAP_ON);
+
+	dw_mipi_dsi_phy_write(dsi, TERMINATION_RESISTER_CONTROL,
+			      TER_RESISTOR_LOW | TER_CAL_DONE |
+			      SETRD_MAX | TER_RESISTORS_ON);
+	dw_mipi_dsi_phy_write(dsi, TERMINATION_RESISTER_CONTROL,
+			      TER_RESISTOR_HIGH | LEVEL_SHIFTERS_ON |
+			      SETRD_MAX | POWER_MANAGE |
+			      TER_RESISTORS_ON);
+
+	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_REQUEST_STATE_TIME_CONTROL,
+			      TLP_PROGRAM_EN | ns2bc(dsi, 500));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_PREPARE_STATE_TIME_CONTROL,
+			      THS_PRE_PROGRAM_EN | ns2ui(dsi, 40));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_HS_ZERO_STATE_TIME_CONTROL,
+			      THS_ZERO_PROGRAM_EN | ns2bc(dsi, 300));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_TRAIL_STATE_TIME_CONTROL,
+			      THS_PRE_PROGRAM_EN | ns2ui(dsi, 100));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_EXIT_STATE_TIME_CONTROL,
+			      BIT(5) | ns2bc(dsi, 100));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_POST_TIME_CONTROL,
+			      BIT(5) | (ns2bc(dsi, 60) + 7));
+
+	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_REQUEST_STATE_TIME_CONTROL,
+			      TLP_PROGRAM_EN | ns2bc(dsi, 500));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_PREPARE_STATE_TIME_CONTROL,
+			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 50) + 20));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_HS_ZERO_STATE_TIME_CONTROL,
+			      THS_ZERO_PROGRAM_EN | (ns2bc(dsi, 140) + 2));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_TRAIL_STATE_TIME_CONTROL,
+			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 60) + 8));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_EXIT_STATE_TIME_CONTROL,
+			      BIT(5) | ns2bc(dsi, 100));
+
+	clk_disable_unprepare(dsi->phy_cfg_clk);
+
+	return ret;
+}
+
+static int
+dw_mipi_dsi_get_lane_mbps(void *priv_data, struct drm_display_mode *mode,
+			  unsigned long mode_flags, u32 lanes, u32 format,
+			  unsigned int *lane_mbps)
+{
+	struct dw_mipi_dsi_rockchip *dsi = priv_data;
+	int bpp;
+	unsigned long mpclk, tmp;
+	unsigned int target_mbps = 1000;
+	unsigned int max_mbps = dppa_map[ARRAY_SIZE(dppa_map) - 1].max_mbps;
+	unsigned long best_freq = 0;
+	unsigned long fvco_min, fvco_max, fin, fout;
+	unsigned int min_prediv, max_prediv;
+	unsigned int _prediv, uninitialized_var(best_prediv);
+	unsigned long _fbdiv, uninitialized_var(best_fbdiv);
+	unsigned long min_delta = ULONG_MAX;
+
+	dsi->format = format;
+	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
+	if (bpp < 0) {
+		DRM_DEV_ERROR(dsi->dev,
+			      "failed to get bpp for pixel format %d\n",
+			      dsi->format);
+		return bpp;
+	}
+
+	mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC);
+	if (mpclk) {
+		/* take 1 / 0.8, since mbps must big than bandwidth of RGB */
+		tmp = mpclk * (bpp / lanes) * 10 / 8;
+		if (tmp < max_mbps)
+			target_mbps = tmp;
+		else
+			DRM_DEV_ERROR(dsi->dev,
+				      "DPHY clock frequency is out of range\n");
+	}
+
+	fin = clk_get_rate(dsi->pllref_clk);
+	fout = target_mbps * USEC_PER_SEC;
+
+	/* constraint: 5Mhz <= Fref / N <= 40MHz */
+	min_prediv = DIV_ROUND_UP(fin, 40 * USEC_PER_SEC);
+	max_prediv = fin / (5 * USEC_PER_SEC);
+
+	/* constraint: 80MHz <= Fvco <= 1500Mhz */
+	fvco_min = 80 * USEC_PER_SEC;
+	fvco_max = 1500 * USEC_PER_SEC;
+
+	for (_prediv = min_prediv; _prediv <= max_prediv; _prediv++) {
+		u64 tmp;
+		u32 delta;
+		/* Fvco = Fref * M / N */
+		tmp = (u64)fout * _prediv;
+		do_div(tmp, fin);
+		_fbdiv = tmp;
+		/*
+		 * Due to the use of a "by 2 pre-scaler," the range of the
+		 * feedback multiplication value M is limited to even division
+		 * numbers, and m must be greater than 6, less than 512.
+		 */
+		if (_fbdiv < 6 || _fbdiv > 512)
+			continue;
+
+		_fbdiv += _fbdiv % 2;
+
+		tmp = (u64)_fbdiv * fin;
+		do_div(tmp, _prediv);
+		if (tmp < fvco_min || tmp > fvco_max)
+			continue;
+
+		delta = abs(fout - tmp);
+		if (delta < min_delta) {
+			best_prediv = _prediv;
+			best_fbdiv = _fbdiv;
+			min_delta = delta;
+			best_freq = tmp;
+		}
+	}
+
+	if (best_freq) {
+		dsi->lane_mbps = DIV_ROUND_UP(best_freq, USEC_PER_SEC);
+		*lane_mbps = dsi->lane_mbps;
+		dsi->input_div = best_prediv;
+		dsi->feedback_div = best_fbdiv;
+	} else {
+		DRM_DEV_ERROR(dsi->dev, "Can not find best_freq for DPHY\n");
+	}
+
+	return 0;
+}
+
+static const struct dw_mipi_dsi_phy_ops dw_mipi_dsi_rockchip_phy_ops = {
+	.init = dw_mipi_dsi_phy_init,
+	.get_lane_mbps = dw_mipi_dsi_get_lane_mbps,
+};
+
+static void dw_mipi_dsi_encoder_mode_set(struct drm_encoder *encoder,
+					 struct drm_display_mode *mode,
+					 struct drm_display_mode *adjusted)
+{
+	struct dw_mipi_dsi_rockchip *dsi = to_dsi(encoder);
+	const struct rockchip_dw_dsi_chip_data *cdata = dsi->cdata;
+	int val, ret, mux;
+
+	mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node,
+						&dsi->encoder);
+	if (mux < 0)
+		return;
+	/*
+	 * For the RK3399, the clk of grf must be enabled before writing grf
+	 * register. And for RK3288 or other soc, this grf_clk must be NULL,
+	 * the clk_prepare_enable return true directly.
+	 */
+	ret = clk_prepare_enable(dsi->grf_clk);
+	if (ret) {
+		DRM_DEV_ERROR(dsi->dev, "Failed to enable grf_clk: %d\n", ret);
+		return;
+	}
+
+	val = cdata->dsi0_en_bit << 16;
+	if (mux)
+		val |= cdata->dsi0_en_bit;
+	regmap_write(dsi->grf_regmap, cdata->grf_switch_reg, val);
+
+	if (cdata->grf_dsi0_mode_reg)
+		regmap_write(dsi->grf_regmap, cdata->grf_dsi0_mode_reg,
+			     cdata->grf_dsi0_mode);
+
+	clk_disable_unprepare(dsi->grf_clk);
+}
+
+static int
+dw_mipi_dsi_encoder_atomic_check(struct drm_encoder *encoder,
+				 struct drm_crtc_state *crtc_state,
+				 struct drm_connector_state *conn_state)
+{
+	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
+	struct dw_mipi_dsi_rockchip *dsi = to_dsi(encoder);
+
+	switch (dsi->format) {
+	case MIPI_DSI_FMT_RGB888:
+		s->output_mode = ROCKCHIP_OUT_MODE_P888;
+		break;
+	case MIPI_DSI_FMT_RGB666:
+		s->output_mode = ROCKCHIP_OUT_MODE_P666;
+		break;
+	case MIPI_DSI_FMT_RGB565:
+		s->output_mode = ROCKCHIP_OUT_MODE_P565;
+		break;
+	default:
+		WARN_ON(1);
+		return -EINVAL;
+	}
+
+	s->output_type = DRM_MODE_CONNECTOR_DSI;
+
+	return 0;
+}
+
+static const struct drm_encoder_helper_funcs
+dw_mipi_dsi_encoder_helper_funcs = {
+	.mode_set = dw_mipi_dsi_encoder_mode_set,
+	.atomic_check = dw_mipi_dsi_encoder_atomic_check,
+};
+
+static const struct drm_encoder_funcs dw_mipi_dsi_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
+static int rockchip_dsi_drm_create_encoder(struct dw_mipi_dsi_rockchip *dsi,
+					   struct drm_device *drm_dev)
+{
+	struct drm_encoder *encoder = &dsi->encoder;
+	int ret;
+
+	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
+							     dsi->dev->of_node);
+
+	ret = drm_encoder_init(drm_dev, encoder, &dw_mipi_dsi_encoder_funcs,
+			       DRM_MODE_ENCODER_DSI, NULL);
+	if (ret) {
+		DRM_ERROR("Failed to initialize encoder with drm\n");
+		return ret;
+	}
+
+	drm_encoder_helper_add(encoder, &dw_mipi_dsi_encoder_helper_funcs);
+
+	return 0;
+}
+
+static int dw_mipi_dsi_rockchip_bind(struct device *dev,
+				     struct device *master,
+				     void *data)
+{
+	struct dw_mipi_dsi_rockchip *dsi = dev_get_drvdata(dev);
+	struct platform_device *pdev = to_platform_device(dev);
+	struct drm_device *drm_dev = data;
+	int ret;
+
+	dsi->pdata.base = dsi->base;
+	dsi->pdata.max_data_lanes = dsi->cdata->max_data_lanes;
+	dsi->pdata.phy_ops = &dw_mipi_dsi_rockchip_phy_ops;
+	dsi->pdata.priv_data = dsi;
+
+	ret = clk_prepare_enable(dsi->pllref_clk);
+	if (ret) {
+		DRM_DEV_ERROR(dev,
+			      "%s: Failed to enable pllref_clk\n", __func__);
+		return ret;
+	}
+
+	ret = rockchip_dsi_drm_create_encoder(dsi, drm_dev);
+	if (ret) {
+		DRM_ERROR("Failed to create drm encoder\n");
+		goto err_pllref;
+	}
+
+	dsi->dmd = dw_mipi_dsi_bind(pdev, &dsi->encoder, &dsi->pdata);
+	if (IS_ERR(dsi->dmd)) {
+		DRM_ERROR("Failed to bind\n");
+		ret = PTR_ERR(dsi->dmd);
+		goto err_pllref;
+	}
+	return 0;
+
+err_pllref:
+	clk_disable_unprepare(dsi->pllref_clk);
+	return ret;
+}
+
+static void dw_mipi_dsi_rockchip_unbind(struct device *dev,
+					struct device *master,
+					void *data)
+{
+	struct dw_mipi_dsi_rockchip *dsi = dev_get_drvdata(dev);
+
+	dw_mipi_dsi_unbind(dsi->dmd);
+	clk_disable_unprepare(dsi->pllref_clk);
+}
+
+static const struct component_ops dw_mipi_dsi_rockchip_ops = {
+	.bind	= dw_mipi_dsi_rockchip_bind,
+	.unbind	= dw_mipi_dsi_rockchip_unbind,
+};
+
+static int dw_mipi_dsi_rockchip_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct dw_mipi_dsi_rockchip *dsi;
+	struct resource *res;
+	const struct rockchip_dw_dsi_chip_data *cdata =
+				of_device_get_match_data(dev);
+	int ret;
+
+	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
+	if (!dsi)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		DRM_ERROR("Unable to get resource\n");
+		return -ENODEV;
+	}
+
+	dsi->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(dsi->base)) {
+		DRM_ERROR("Unable to get dsi registers\n");
+		return PTR_ERR(dsi->base);
+	}
+
+	dsi->pllref_clk = devm_clk_get(dev, "ref");
+	if (IS_ERR(dsi->pllref_clk)) {
+		ret = PTR_ERR(dsi->pllref_clk);
+		DRM_DEV_ERROR(dev,
+			      "Unable to get pll reference clock: %d\n", ret);
+		return ret;
+	}
+
+	if (cdata->flags & DW_MIPI_NEEDS_PHY_CFG_CLK) {
+		dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
+		if (IS_ERR(dsi->phy_cfg_clk)) {
+			ret = PTR_ERR(dsi->phy_cfg_clk);
+			DRM_DEV_ERROR(dev,
+				      "Unable to get phy_cfg_clk: %d\n", ret);
+			return ret;
+		}
+	}
+
+	if (cdata->flags & DW_MIPI_NEEDS_GRF_CLK) {
+		dsi->grf_clk = devm_clk_get(dev, "grf");
+		if (IS_ERR(dsi->grf_clk)) {
+			ret = PTR_ERR(dsi->grf_clk);
+			DRM_DEV_ERROR(dev, "Unable to get grf_clk: %d\n", ret);
+			return ret;
+		}
+	}
+
+	dsi->grf_regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
+	if (IS_ERR(dsi->grf_regmap)) {
+		DRM_DEV_ERROR(dsi->dev, "Unable to get rockchip,grf\n");
+		return PTR_ERR(dsi->grf_regmap);
+	}
+
+	dsi->cdata = cdata;
+	dsi->dev = dev;
+	dev_set_drvdata(dev, dsi);
+
+	return component_add(&pdev->dev, &dw_mipi_dsi_rockchip_ops);
+}
+
+static int dw_mipi_dsi_rockchip_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &dw_mipi_dsi_rockchip_ops);
+
+	return 0;
+}
+
+static struct rockchip_dw_dsi_chip_data rk3288_chip_data = {
+	.dsi0_en_bit = RK3288_DSI0_SEL_VOP_LIT,
+	.dsi1_en_bit = RK3288_DSI1_SEL_VOP_LIT,
+	.grf_switch_reg = RK3288_GRF_SOC_CON6,
+	.max_data_lanes = 4,
+};
+
+static struct rockchip_dw_dsi_chip_data rk3399_chip_data = {
+	.dsi0_en_bit = RK3399_DSI0_SEL_VOP_LIT,
+	.dsi1_en_bit = RK3399_DSI1_SEL_VOP_LIT,
+	.grf_switch_reg = RK3399_GRF_SOC_CON20,
+	.grf_dsi0_mode = RK3399_GRF_DSI_MODE,
+	.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
+	.flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK,
+	.max_data_lanes = 4,
+};
+
+static const struct of_device_id dw_mipi_dsi_rockchip_dt_ids[] = {
+	{
+	 .compatible = "rockchip,rk3288-mipi-dsi",
+	 .data = &rk3288_chip_data,
+	}, {
+	 .compatible = "rockchip,rk3399-mipi-dsi",
+	 .data = &rk3399_chip_data,
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dw_mipi_dsi_rockchip_dt_ids);
+
+struct platform_driver dw_mipi_dsi_rockchip_driver = {
+	.probe		= dw_mipi_dsi_rockchip_probe,
+	.remove		= dw_mipi_dsi_rockchip_remove,
+	.driver		= {
+		.of_match_table = dw_mipi_dsi_rockchip_dt_ids,
+		.name	= "dw-mipi-dsi-rockchip",
+	},
+};
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index 76d63de..d40cc39 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -462,7 +462,7 @@ static int __init rockchip_drm_init(void)
 	ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
 	ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver,
 				CONFIG_ROCKCHIP_DW_HDMI);
-	ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_driver,
+	ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_rockchip_driver,
 				CONFIG_ROCKCHIP_DW_MIPI_DSI);
 	ADD_ROCKCHIP_SUB_DRIVER(inno_hdmi_driver, CONFIG_ROCKCHIP_INNO_HDMI);
 
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
index 498dfbc..af235b2 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
@@ -66,7 +66,7 @@ void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
 
 extern struct platform_driver cdn_dp_driver;
 extern struct platform_driver dw_hdmi_rockchip_pltfm_driver;
-extern struct platform_driver dw_mipi_dsi_driver;
+extern struct platform_driver dw_mipi_dsi_rockchip_driver;
 extern struct platform_driver inno_hdmi_driver;
 extern struct platform_driver rockchip_dp_driver;
 extern struct platform_driver rockchip_lvds_driver;
-- 
1.9.1

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Re: [PATCH v3 4/5] drm/rockchip: Add ROCKCHIP DW MIPI DSI controller driver

[Matthias Kaehlcke]

El Tue, Nov 28, 2017 at 07:20:05PM +0800 Nickey Yang ha dit:

> Add the ROCKCHIP DSI controller driver that uses the Synopsys DesignWare
> MIPI DSI host controller bridge.
> 
> v2:
>    add err_pllref, remove unnecessary encoder.enable & disable
>    correct spelling mistakes
> v3:
>    call dw_mipi_dsi_unbind() in dw_mipi_dsi_rockchip_unbind()
>    fix typo, use of_device_get_match_data(),
>    change some ‘bind()’ logic into 'probe()'
>    add 'dev_set_drvdata()'
> 
> Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
> ---
>  drivers/gpu/drm/rockchip/Kconfig                |    2 +-
>  drivers/gpu/drm/rockchip/Makefile               |    2 +-
>  drivers/gpu/drm/rockchip/dw-mipi-dsi.c          | 1349 -----------------------
>  drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c |  764 +++++++++++++
>  drivers/gpu/drm/rockchip/rockchip_drm_drv.c     |    2 +-
>  drivers/gpu/drm/rockchip/rockchip_drm_drv.h     |    2 +-
>  6 files changed, 768 insertions(+), 1353 deletions(-)
>  delete mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi.c
>  create mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
> 
> diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
> index 0ccc762..9eb4795 100644
> --- a/drivers/gpu/drm/rockchip/Kconfig
> +++ b/drivers/gpu/drm/rockchip/Kconfig
> @@ -7,7 +7,7 @@ config DRM_ROCKCHIP
>  	select VIDEOMODE_HELPERS
>  	select DRM_ANALOGIX_DP if ROCKCHIP_ANALOGIX_DP
>  	select DRM_DW_HDMI if ROCKCHIP_DW_HDMI
> -	select DRM_MIPI_DSI if ROCKCHIP_DW_MIPI_DSI
> +	select DRM_DW_MIPI_DSI if ROCKCHIP_DW_MIPI_DSI
>  	select SND_SOC_HDMI_CODEC if ROCKCHIP_CDN_DP && SND_SOC
>  	help
>  	  Choose this option if you have a Rockchip soc chipset.
> diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile
> index a314e21..c05fe47 100644
> --- a/drivers/gpu/drm/rockchip/Makefile
> +++ b/drivers/gpu/drm/rockchip/Makefile
> @@ -11,7 +11,7 @@ rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o
>  rockchipdrm-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o
>  rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o
>  rockchipdrm-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o
> -rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi.o
> +rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi_rockchip.o
>  rockchipdrm-$(CONFIG_ROCKCHIP_INNO_HDMI) += inno_hdmi.o
>  rockchipdrm-$(CONFIG_ROCKCHIP_LVDS) += rockchip_lvds.o
>  
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> deleted file mode 100644
> index b15755b..0000000
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ /dev/null
> @@ -1,1349 +0,0 @@
> -/*
> - * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License as published by
> - * the Free Software Foundation; either version 2 of the License, or
> - * (at your option) any later version.
> - */
> -#include <linux/clk.h>
> -#include <linux/component.h>
> -#include <linux/iopoll.h>
> -#include <linux/math64.h>
> -#include <linux/module.h>
> -#include <linux/of_device.h>
> -#include <linux/pm_runtime.h>
> -#include <linux/regmap.h>
> -#include <linux/reset.h>
> -#include <linux/mfd/syscon.h>
> -#include <drm/drm_atomic_helper.h>
> -#include <drm/drm_crtc.h>
> -#include <drm/drm_crtc_helper.h>
> -#include <drm/drm_mipi_dsi.h>
> -#include <drm/drm_of.h>
> -#include <drm/drm_panel.h>
> -#include <drm/drmP.h>
> -#include <video/mipi_display.h>
> -
> -#include "rockchip_drm_drv.h"
> -#include "rockchip_drm_vop.h"
> -
> -#define DRIVER_NAME    "dw-mipi-dsi"
> -
> -#define RK3288_GRF_SOC_CON6		0x025c
> -#define RK3288_DSI0_SEL_VOP_LIT		BIT(6)
> -#define RK3288_DSI1_SEL_VOP_LIT		BIT(9)
> -
> -#define RK3399_GRF_SOC_CON20		0x6250
> -#define RK3399_DSI0_SEL_VOP_LIT		BIT(0)
> -#define RK3399_DSI1_SEL_VOP_LIT		BIT(4)
> -
> -/* disable turnrequest, turndisable, forcetxstopmode, forcerxmode */
> -#define RK3399_GRF_SOC_CON22		0x6258
> -#define RK3399_GRF_DSI_MODE		0xffff0000
> -
> -#define DSI_VERSION			0x00
> -#define DSI_PWR_UP			0x04
> -#define RESET				0
> -#define POWERUP				BIT(0)
> -
> -#define DSI_CLKMGR_CFG			0x08
> -#define TO_CLK_DIVIDSION(div)		(((div) & 0xff) << 8)
> -#define TX_ESC_CLK_DIVIDSION(div)	(((div) & 0xff) << 0)
> -
> -#define DSI_DPI_VCID			0x0c
> -#define DPI_VID(vid)			(((vid) & 0x3) << 0)
> -
> -#define DSI_DPI_COLOR_CODING		0x10
> -#define EN18_LOOSELY			BIT(8)
> -#define DPI_COLOR_CODING_16BIT_1	0x0
> -#define DPI_COLOR_CODING_16BIT_2	0x1
> -#define DPI_COLOR_CODING_16BIT_3	0x2
> -#define DPI_COLOR_CODING_18BIT_1	0x3
> -#define DPI_COLOR_CODING_18BIT_2	0x4
> -#define DPI_COLOR_CODING_24BIT		0x5
> -
> -#define DSI_DPI_CFG_POL			0x14
> -#define COLORM_ACTIVE_LOW		BIT(4)
> -#define SHUTD_ACTIVE_LOW		BIT(3)
> -#define HSYNC_ACTIVE_LOW		BIT(2)
> -#define VSYNC_ACTIVE_LOW		BIT(1)
> -#define DATAEN_ACTIVE_LOW		BIT(0)
> -
> -#define DSI_DPI_LP_CMD_TIM		0x18
> -#define OUTVACT_LPCMD_TIME(p)		(((p) & 0xff) << 16)
> -#define INVACT_LPCMD_TIME(p)		((p) & 0xff)
> -
> -#define DSI_DBI_CFG			0x20
> -#define DSI_DBI_CMDSIZE			0x28
> -
> -#define DSI_PCKHDL_CFG			0x2c
> -#define EN_CRC_RX			BIT(4)
> -#define EN_ECC_RX			BIT(3)
> -#define EN_BTA				BIT(2)
> -#define EN_EOTP_RX			BIT(1)
> -#define EN_EOTP_TX			BIT(0)
> -
> -#define DSI_MODE_CFG			0x34
> -#define ENABLE_VIDEO_MODE		0
> -#define ENABLE_CMD_MODE			BIT(0)
> -
> -#define DSI_VID_MODE_CFG		0x38
> -#define FRAME_BTA_ACK			BIT(14)
> -#define ENABLE_LOW_POWER		(0x3f << 8)
> -#define ENABLE_LOW_POWER_MASK		(0x3f << 8)
> -#define VID_MODE_TYPE_NON_BURST_SYNC_PULSES	0x0
> -#define VID_MODE_TYPE_NON_BURST_SYNC_EVENTS	0x1
> -#define VID_MODE_TYPE_BURST			0x2
> -#define VID_MODE_TYPE_MASK			0x3
> -
> -#define DSI_VID_PKT_SIZE		0x3c
> -#define VID_PKT_SIZE(p)			(((p) & 0x3fff) << 0)
> -#define VID_PKT_MAX_SIZE		0x3fff
> -
> -#define DSI_VID_HSA_TIME		0x48
> -#define DSI_VID_HBP_TIME		0x4c
> -#define DSI_VID_HLINE_TIME		0x50
> -#define DSI_VID_VSA_LINES		0x54
> -#define DSI_VID_VBP_LINES		0x58
> -#define DSI_VID_VFP_LINES		0x5c
> -#define DSI_VID_VACTIVE_LINES		0x60
> -#define DSI_CMD_MODE_CFG		0x68
> -#define MAX_RD_PKT_SIZE_LP		BIT(24)
> -#define DCS_LW_TX_LP			BIT(19)
> -#define DCS_SR_0P_TX_LP			BIT(18)
> -#define DCS_SW_1P_TX_LP			BIT(17)
> -#define DCS_SW_0P_TX_LP			BIT(16)
> -#define GEN_LW_TX_LP			BIT(14)
> -#define GEN_SR_2P_TX_LP			BIT(13)
> -#define GEN_SR_1P_TX_LP			BIT(12)
> -#define GEN_SR_0P_TX_LP			BIT(11)
> -#define GEN_SW_2P_TX_LP			BIT(10)
> -#define GEN_SW_1P_TX_LP			BIT(9)
> -#define GEN_SW_0P_TX_LP			BIT(8)
> -#define EN_ACK_RQST			BIT(1)
> -#define EN_TEAR_FX			BIT(0)
> -
> -#define CMD_MODE_ALL_LP			(MAX_RD_PKT_SIZE_LP | \
> -					 DCS_LW_TX_LP | \
> -					 DCS_SR_0P_TX_LP | \
> -					 DCS_SW_1P_TX_LP | \
> -					 DCS_SW_0P_TX_LP | \
> -					 GEN_LW_TX_LP | \
> -					 GEN_SR_2P_TX_LP | \
> -					 GEN_SR_1P_TX_LP | \
> -					 GEN_SR_0P_TX_LP | \
> -					 GEN_SW_2P_TX_LP | \
> -					 GEN_SW_1P_TX_LP | \
> -					 GEN_SW_0P_TX_LP)
> -
> -#define DSI_GEN_HDR			0x6c
> -#define GEN_HDATA(data)			(((data) & 0xffff) << 8)
> -#define GEN_HDATA_MASK			(0xffff << 8)
> -#define GEN_HTYPE(type)			(((type) & 0xff) << 0)
> -#define GEN_HTYPE_MASK			0xff
> -
> -#define DSI_GEN_PLD_DATA		0x70
> -
> -#define DSI_CMD_PKT_STATUS		0x74
> -#define GEN_CMD_EMPTY			BIT(0)
> -#define GEN_CMD_FULL			BIT(1)
> -#define GEN_PLD_W_EMPTY			BIT(2)
> -#define GEN_PLD_W_FULL			BIT(3)
> -#define GEN_PLD_R_EMPTY			BIT(4)
> -#define GEN_PLD_R_FULL			BIT(5)
> -#define GEN_RD_CMD_BUSY			BIT(6)
> -
> -#define DSI_TO_CNT_CFG			0x78
> -#define HSTX_TO_CNT(p)			(((p) & 0xffff) << 16)
> -#define LPRX_TO_CNT(p)			((p) & 0xffff)
> -
> -#define DSI_BTA_TO_CNT			0x8c
> -#define DSI_LPCLK_CTRL			0x94
> -#define AUTO_CLKLANE_CTRL		BIT(1)
> -#define PHY_TXREQUESTCLKHS		BIT(0)
> -
> -#define DSI_PHY_TMR_LPCLK_CFG		0x98
> -#define PHY_CLKHS2LP_TIME(lbcc)		(((lbcc) & 0x3ff) << 16)
> -#define PHY_CLKLP2HS_TIME(lbcc)		((lbcc) & 0x3ff)
> -
> -#define DSI_PHY_TMR_CFG			0x9c
> -#define PHY_HS2LP_TIME(lbcc)		(((lbcc) & 0xff) << 24)
> -#define PHY_LP2HS_TIME(lbcc)		(((lbcc) & 0xff) << 16)
> -#define MAX_RD_TIME(lbcc)		((lbcc) & 0x7fff)
> -
> -#define DSI_PHY_RSTZ			0xa0
> -#define PHY_DISFORCEPLL			0
> -#define PHY_ENFORCEPLL			BIT(3)
> -#define PHY_DISABLECLK			0
> -#define PHY_ENABLECLK			BIT(2)
> -#define PHY_RSTZ			0
> -#define PHY_UNRSTZ			BIT(1)
> -#define PHY_SHUTDOWNZ			0
> -#define PHY_UNSHUTDOWNZ			BIT(0)
> -
> -#define DSI_PHY_IF_CFG			0xa4
> -#define N_LANES(n)			((((n) - 1) & 0x3) << 0)
> -#define PHY_STOP_WAIT_TIME(cycle)	(((cycle) & 0xff) << 8)
> -
> -#define DSI_PHY_STATUS			0xb0
> -#define LOCK				BIT(0)
> -#define STOP_STATE_CLK_LANE		BIT(2)
> -
> -#define DSI_PHY_TST_CTRL0		0xb4
> -#define PHY_TESTCLK			BIT(1)
> -#define PHY_UNTESTCLK			0
> -#define PHY_TESTCLR			BIT(0)
> -#define PHY_UNTESTCLR			0
> -
> -#define DSI_PHY_TST_CTRL1		0xb8
> -#define PHY_TESTEN			BIT(16)
> -#define PHY_UNTESTEN			0
> -#define PHY_TESTDOUT(n)			(((n) & 0xff) << 8)
> -#define PHY_TESTDIN(n)			(((n) & 0xff) << 0)
> -
> -#define DSI_INT_ST0			0xbc
> -#define DSI_INT_ST1			0xc0
> -#define DSI_INT_MSK0			0xc4
> -#define DSI_INT_MSK1			0xc8
> -
> -#define PHY_STATUS_TIMEOUT_US		10000
> -#define CMD_PKT_STATUS_TIMEOUT_US	20000
> -
> -#define BYPASS_VCO_RANGE	BIT(7)
> -#define VCO_RANGE_CON_SEL(val)	(((val) & 0x7) << 3)
> -#define VCO_IN_CAP_CON_DEFAULT	(0x0 << 1)
> -#define VCO_IN_CAP_CON_LOW	(0x1 << 1)
> -#define VCO_IN_CAP_CON_HIGH	(0x2 << 1)
> -#define REF_BIAS_CUR_SEL	BIT(0)
> -
> -#define CP_CURRENT_3MA		BIT(3)
> -#define CP_PROGRAM_EN		BIT(7)
> -#define LPF_PROGRAM_EN		BIT(6)
> -#define LPF_RESISTORS_20_KOHM	0
> -
> -#define HSFREQRANGE_SEL(val)	(((val) & 0x3f) << 1)
> -
> -#define INPUT_DIVIDER(val)	(((val) - 1) & 0x7f)
> -#define LOW_PROGRAM_EN		0
> -#define HIGH_PROGRAM_EN		BIT(7)
> -#define LOOP_DIV_LOW_SEL(val)	(((val) - 1) & 0x1f)
> -#define LOOP_DIV_HIGH_SEL(val)	((((val) - 1) >> 5) & 0x1f)
> -#define PLL_LOOP_DIV_EN		BIT(5)
> -#define PLL_INPUT_DIV_EN	BIT(4)
> -
> -#define POWER_CONTROL		BIT(6)
> -#define INTERNAL_REG_CURRENT	BIT(3)
> -#define BIAS_BLOCK_ON		BIT(2)
> -#define BANDGAP_ON		BIT(0)
> -
> -#define TER_RESISTOR_HIGH	BIT(7)
> -#define	TER_RESISTOR_LOW	0
> -#define LEVEL_SHIFTERS_ON	BIT(6)
> -#define TER_CAL_DONE		BIT(5)
> -#define SETRD_MAX		(0x7 << 2)
> -#define POWER_MANAGE		BIT(1)
> -#define TER_RESISTORS_ON	BIT(0)
> -
> -#define BIASEXTR_SEL(val)	((val) & 0x7)
> -#define BANDGAP_SEL(val)	((val) & 0x7)
> -#define TLP_PROGRAM_EN		BIT(7)
> -#define THS_PRE_PROGRAM_EN	BIT(7)
> -#define THS_ZERO_PROGRAM_EN	BIT(6)
> -
> -#define DW_MIPI_NEEDS_PHY_CFG_CLK	BIT(0)
> -#define DW_MIPI_NEEDS_GRF_CLK		BIT(1)
> -
> -enum {
> -	BANDGAP_97_07,
> -	BANDGAP_98_05,
> -	BANDGAP_99_02,
> -	BANDGAP_100_00,
> -	BANDGAP_93_17,
> -	BANDGAP_94_15,
> -	BANDGAP_95_12,
> -	BANDGAP_96_10,
> -};
> -
> -enum {
> -	BIASEXTR_87_1,
> -	BIASEXTR_91_5,
> -	BIASEXTR_95_9,
> -	BIASEXTR_100,
> -	BIASEXTR_105_94,
> -	BIASEXTR_111_88,
> -	BIASEXTR_118_8,
> -	BIASEXTR_127_7,
> -};
> -
> -struct dw_mipi_dsi_plat_data {
> -	u32 dsi0_en_bit;
> -	u32 dsi1_en_bit;
> -	u32 grf_switch_reg;
> -	u32 grf_dsi0_mode;
> -	u32 grf_dsi0_mode_reg;
> -	unsigned int flags;
> -	unsigned int max_data_lanes;
> -};
> -
> -struct dw_mipi_dsi {
> -	struct drm_encoder encoder;
> -	struct drm_connector connector;
> -	struct mipi_dsi_host dsi_host;
> -	struct drm_panel *panel;
> -	struct device *dev;
> -	struct regmap *grf_regmap;
> -	void __iomem *base;
> -
> -	struct clk *grf_clk;
> -	struct clk *pllref_clk;
> -	struct clk *pclk;
> -	struct clk *phy_cfg_clk;
> -
> -	int dpms_mode;
> -	unsigned int lane_mbps; /* per lane */
> -	u32 channel;
> -	u32 lanes;
> -	u32 format;
> -	u16 input_div;
> -	u16 feedback_div;
> -	unsigned long mode_flags;
> -
> -	const struct dw_mipi_dsi_plat_data *pdata;
> -};
> -
> -enum dw_mipi_dsi_mode {
> -	DW_MIPI_DSI_CMD_MODE,
> -	DW_MIPI_DSI_VID_MODE,
> -};
> -
> -struct dphy_pll_testdin_map {
> -	unsigned int max_mbps;
> -	u8 testdin;
> -};
> -
> -/* The table is based on 27MHz DPHY pll reference clock. */
> -static const struct dphy_pll_testdin_map dptdin_map[] = {
> -	{  90, 0x00}, { 100, 0x10}, { 110, 0x20}, { 130, 0x01},
> -	{ 140, 0x11}, { 150, 0x21}, { 170, 0x02}, { 180, 0x12},
> -	{ 200, 0x22}, { 220, 0x03}, { 240, 0x13}, { 250, 0x23},
> -	{ 270, 0x04}, { 300, 0x14}, { 330, 0x05}, { 360, 0x15},
> -	{ 400, 0x25}, { 450, 0x06}, { 500, 0x16}, { 550, 0x07},
> -	{ 600, 0x17}, { 650, 0x08}, { 700, 0x18}, { 750, 0x09},
> -	{ 800, 0x19}, { 850, 0x29}, { 900, 0x39}, { 950, 0x0a},
> -	{1000, 0x1a}, {1050, 0x2a}, {1100, 0x3a}, {1150, 0x0b},
> -	{1200, 0x1b}, {1250, 0x2b}, {1300, 0x3b}, {1350, 0x0c},
> -	{1400, 0x1c}, {1450, 0x2c}, {1500, 0x3c}
> -};
> -
> -static int max_mbps_to_testdin(unsigned int max_mbps)
> -{
> -	int i;
> -
> -	for (i = 0; i < ARRAY_SIZE(dptdin_map); i++)
> -		if (dptdin_map[i].max_mbps > max_mbps)
> -			return dptdin_map[i].testdin;
> -
> -	return -EINVAL;
> -}
> -
> -/*
> - * The controller should generate 2 frames before
> - * preparing the peripheral.
> - */
> -static void dw_mipi_dsi_wait_for_two_frames(struct drm_display_mode *mode)
> -{
> -	int refresh, two_frames;
> -
> -	refresh = drm_mode_vrefresh(mode);
> -	two_frames = DIV_ROUND_UP(MSEC_PER_SEC, refresh) * 2;
> -	msleep(two_frames);
> -}
> -
> -static inline struct dw_mipi_dsi *host_to_dsi(struct mipi_dsi_host *host)
> -{
> -	return container_of(host, struct dw_mipi_dsi, dsi_host);
> -}
> -
> -static inline struct dw_mipi_dsi *con_to_dsi(struct drm_connector *con)
> -{
> -	return container_of(con, struct dw_mipi_dsi, connector);
> -}
> -
> -static inline struct dw_mipi_dsi *encoder_to_dsi(struct drm_encoder *encoder)
> -{
> -	return container_of(encoder, struct dw_mipi_dsi, encoder);
> -}
> -
> -static inline void dsi_write(struct dw_mipi_dsi *dsi, u32 reg, u32 val)
> -{
> -	writel(val, dsi->base + reg);
> -}
> -
> -static inline u32 dsi_read(struct dw_mipi_dsi *dsi, u32 reg)
> -{
> -	return readl(dsi->base + reg);
> -}
> -
> -static void dw_mipi_dsi_phy_write(struct dw_mipi_dsi *dsi, u8 test_code,
> -				  u8 test_data)
> -{
> -	/*
> -	 * With the falling edge on TESTCLK, the TESTDIN[7:0] signal content
> -	 * is latched internally as the current test code. Test data is
> -	 * programmed internally by rising edge on TESTCLK.
> -	 */
> -	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
> -
> -	dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_TESTEN | PHY_TESTDOUT(0) |
> -					  PHY_TESTDIN(test_code));
> -
> -	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLK | PHY_UNTESTCLR);
> -
> -	dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_UNTESTEN | PHY_TESTDOUT(0) |
> -					  PHY_TESTDIN(test_data));
> -
> -	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
> -}
> -
> -/**
> - * ns2bc - Nanoseconds to byte clock cycles
> - */
> -static inline unsigned int ns2bc(struct dw_mipi_dsi *dsi, int ns)
> -{
> -	return DIV_ROUND_UP(ns * dsi->lane_mbps / 8, 1000);
> -}
> -
> -/**
> - * ns2ui - Nanoseconds to UI time periods
> - */
> -static inline unsigned int ns2ui(struct dw_mipi_dsi *dsi, int ns)
> -{
> -	return DIV_ROUND_UP(ns * dsi->lane_mbps, 1000);
> -}
> -
> -static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
> -{
> -	int ret, testdin, vco, val;
> -
> -	vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;
> -
> -	testdin = max_mbps_to_testdin(dsi->lane_mbps);
> -	if (testdin < 0) {
> -		DRM_DEV_ERROR(dsi->dev,
> -			      "failed to get testdin for %dmbps lane clock\n",
> -			      dsi->lane_mbps);
> -		return testdin;
> -	}
> -
> -	/* Start by clearing PHY state */
> -	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
> -	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLR);
> -	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
> -
> -	ret = clk_prepare_enable(dsi->phy_cfg_clk);
> -	if (ret) {
> -		DRM_DEV_ERROR(dsi->dev, "Failed to enable phy_cfg_clk\n");
> -		return ret;
> -	}
> -
> -	dw_mipi_dsi_phy_write(dsi, 0x10, BYPASS_VCO_RANGE |
> -					 VCO_RANGE_CON_SEL(vco) |
> -					 VCO_IN_CAP_CON_LOW |
> -					 REF_BIAS_CUR_SEL);
> -
> -	dw_mipi_dsi_phy_write(dsi, 0x11, CP_CURRENT_3MA);
> -	dw_mipi_dsi_phy_write(dsi, 0x12, CP_PROGRAM_EN | LPF_PROGRAM_EN |
> -					 LPF_RESISTORS_20_KOHM);
> -
> -	dw_mipi_dsi_phy_write(dsi, 0x44, HSFREQRANGE_SEL(testdin));
> -
> -	dw_mipi_dsi_phy_write(dsi, 0x17, INPUT_DIVIDER(dsi->input_div));
> -	dw_mipi_dsi_phy_write(dsi, 0x18, LOOP_DIV_LOW_SEL(dsi->feedback_div) |
> -					 LOW_PROGRAM_EN);
> -	dw_mipi_dsi_phy_write(dsi, 0x18, LOOP_DIV_HIGH_SEL(dsi->feedback_div) |
> -					 HIGH_PROGRAM_EN);
> -	dw_mipi_dsi_phy_write(dsi, 0x19, PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
> -
> -	dw_mipi_dsi_phy_write(dsi, 0x22, LOW_PROGRAM_EN |
> -					 BIASEXTR_SEL(BIASEXTR_127_7));
> -	dw_mipi_dsi_phy_write(dsi, 0x22, HIGH_PROGRAM_EN |
> -					 BANDGAP_SEL(BANDGAP_96_10));
> -
> -	dw_mipi_dsi_phy_write(dsi, 0x20, POWER_CONTROL | INTERNAL_REG_CURRENT |
> -					 BIAS_BLOCK_ON | BANDGAP_ON);
> -
> -	dw_mipi_dsi_phy_write(dsi, 0x21, TER_RESISTOR_LOW | TER_CAL_DONE |
> -					 SETRD_MAX | TER_RESISTORS_ON);
> -	dw_mipi_dsi_phy_write(dsi, 0x21, TER_RESISTOR_HIGH | LEVEL_SHIFTERS_ON |
> -					 SETRD_MAX | POWER_MANAGE |
> -					 TER_RESISTORS_ON);
> -
> -	dw_mipi_dsi_phy_write(dsi, 0x60, TLP_PROGRAM_EN | ns2bc(dsi, 500));
> -	dw_mipi_dsi_phy_write(dsi, 0x61, THS_PRE_PROGRAM_EN | ns2ui(dsi, 40));
> -	dw_mipi_dsi_phy_write(dsi, 0x62, THS_ZERO_PROGRAM_EN | ns2bc(dsi, 300));
> -	dw_mipi_dsi_phy_write(dsi, 0x63, THS_PRE_PROGRAM_EN | ns2ui(dsi, 100));
> -	dw_mipi_dsi_phy_write(dsi, 0x64, BIT(5) | ns2bc(dsi, 100));
> -	dw_mipi_dsi_phy_write(dsi, 0x65, BIT(5) | (ns2bc(dsi, 60) + 7));
> -
> -	dw_mipi_dsi_phy_write(dsi, 0x70, TLP_PROGRAM_EN | ns2bc(dsi, 500));
> -	dw_mipi_dsi_phy_write(dsi, 0x71,
> -			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 50) + 5));
> -	dw_mipi_dsi_phy_write(dsi, 0x72,
> -			      THS_ZERO_PROGRAM_EN | (ns2bc(dsi, 140) + 2));
> -	dw_mipi_dsi_phy_write(dsi, 0x73,
> -			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 60) + 8));
> -	dw_mipi_dsi_phy_write(dsi, 0x74, BIT(5) | ns2bc(dsi, 100));
> -
> -	dsi_write(dsi, DSI_PHY_RSTZ, PHY_ENFORCEPLL | PHY_ENABLECLK |
> -				     PHY_UNRSTZ | PHY_UNSHUTDOWNZ);
> -
> -	ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
> -				 val, val & LOCK, 1000, PHY_STATUS_TIMEOUT_US);
> -	if (ret < 0) {
> -		DRM_DEV_ERROR(dsi->dev, "failed to wait for phy lock state\n");
> -		goto phy_init_end;
> -	}
> -
> -	ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
> -				 val, val & STOP_STATE_CLK_LANE, 1000,
> -				 PHY_STATUS_TIMEOUT_US);
> -	if (ret < 0)
> -		DRM_DEV_ERROR(dsi->dev,
> -			      "failed to wait for phy clk lane stop state\n");
> -
> -phy_init_end:
> -	clk_disable_unprepare(dsi->phy_cfg_clk);
> -
> -	return ret;
> -}
> -
> -static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi,
> -				    struct drm_display_mode *mode)
> -{
> -	unsigned int i, pre;
> -	unsigned long mpclk, pllref, tmp;
> -	unsigned int m = 1, n = 1, target_mbps = 1000;
> -	unsigned int max_mbps = dptdin_map[ARRAY_SIZE(dptdin_map) - 1].max_mbps;
> -	int bpp;
> -
> -	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
> -	if (bpp < 0) {
> -		DRM_DEV_ERROR(dsi->dev,
> -			      "failed to get bpp for pixel format %d\n",
> -			      dsi->format);
> -		return bpp;
> -	}
> -
> -	mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC);
> -	if (mpclk) {
> -		/* take 1 / 0.8, since mbps must big than bandwidth of RGB */
> -		tmp = mpclk * (bpp / dsi->lanes) * 10 / 8;
> -		if (tmp < max_mbps)
> -			target_mbps = tmp;
> -		else
> -			DRM_DEV_ERROR(dsi->dev,
> -				      "DPHY clock frequency is out of range\n");
> -	}
> -
> -	pllref = DIV_ROUND_UP(clk_get_rate(dsi->pllref_clk), USEC_PER_SEC);
> -	tmp = pllref;
> -
> -	/*
> -	 * The limits on the PLL divisor are:
> -	 *
> -	 *	5MHz <= (pllref / n) <= 40MHz
> -	 *
> -	 * we walk over these values in descreasing order so that if we hit
> -	 * an exact match for target_mbps it is more likely that "m" will be
> -	 * even.
> -	 *
> -	 * TODO: ensure that "m" is even after this loop.
> -	 */
> -	for (i = pllref / 5; i > (pllref / 40); i--) {
> -		pre = pllref / i;
> -		if ((tmp > (target_mbps % pre)) && (target_mbps / pre < 512)) {
> -			tmp = target_mbps % pre;
> -			n = i;
> -			m = target_mbps / pre;
> -		}
> -		if (tmp == 0)
> -			break;
> -	}
> -
> -	dsi->lane_mbps = pllref / n * m;
> -	dsi->input_div = n;
> -	dsi->feedback_div = m;
> -
> -	return 0;
> -}
> -
> -static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
> -				   struct mipi_dsi_device *device)
> -{
> -	struct dw_mipi_dsi *dsi = host_to_dsi(host);
> -
> -	if (device->lanes > dsi->pdata->max_data_lanes) {
> -		DRM_DEV_ERROR(dsi->dev,
> -			      "the number of data lanes(%u) is too many\n",
> -			      device->lanes);
> -		return -EINVAL;
> -	}
> -
> -	dsi->lanes = device->lanes;
> -	dsi->channel = device->channel;
> -	dsi->format = device->format;
> -	dsi->mode_flags = device->mode_flags;
> -	dsi->panel = of_drm_find_panel(device->dev.of_node);
> -	if (dsi->panel)
> -		return drm_panel_attach(dsi->panel, &dsi->connector);
> -
> -	return -EINVAL;
> -}
> -
> -static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host,
> -				   struct mipi_dsi_device *device)
> -{
> -	struct dw_mipi_dsi *dsi = host_to_dsi(host);
> -
> -	drm_panel_detach(dsi->panel);
> -
> -	return 0;
> -}
> -
> -static void dw_mipi_message_config(struct dw_mipi_dsi *dsi,
> -				   const struct mipi_dsi_msg *msg)
> -{
> -	bool lpm = msg->flags & MIPI_DSI_MSG_USE_LPM;
> -	u32 val = 0;
> -
> -	if (msg->flags & MIPI_DSI_MSG_REQ_ACK)
> -		val |= EN_ACK_RQST;
> -	if (lpm)
> -		val |= CMD_MODE_ALL_LP;
> -
> -	dsi_write(dsi, DSI_LPCLK_CTRL, lpm ? 0 : PHY_TXREQUESTCLKHS);
> -	dsi_write(dsi, DSI_CMD_MODE_CFG, val);
> -}
> -
> -static int dw_mipi_dsi_gen_pkt_hdr_write(struct dw_mipi_dsi *dsi, u32 hdr_val)
> -{
> -	int ret;
> -	u32 val, mask;
> -
> -	ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
> -				 val, !(val & GEN_CMD_FULL), 1000,
> -				 CMD_PKT_STATUS_TIMEOUT_US);
> -	if (ret < 0) {
> -		DRM_DEV_ERROR(dsi->dev,
> -			      "failed to get available command FIFO\n");
> -		return ret;
> -	}
> -
> -	dsi_write(dsi, DSI_GEN_HDR, hdr_val);
> -
> -	mask = GEN_CMD_EMPTY | GEN_PLD_W_EMPTY;
> -	ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
> -				 val, (val & mask) == mask,
> -				 1000, CMD_PKT_STATUS_TIMEOUT_US);
> -	if (ret < 0) {
> -		DRM_DEV_ERROR(dsi->dev, "failed to write command FIFO\n");
> -		return ret;
> -	}
> -
> -	return 0;
> -}
> -
> -static int dw_mipi_dsi_dcs_short_write(struct dw_mipi_dsi *dsi,
> -				       const struct mipi_dsi_msg *msg)
> -{
> -	const u8 *tx_buf = msg->tx_buf;
> -	u16 data = 0;
> -	u32 val;
> -
> -	if (msg->tx_len > 0)
> -		data |= tx_buf[0];
> -	if (msg->tx_len > 1)
> -		data |= tx_buf[1] << 8;
> -
> -	if (msg->tx_len > 2) {
> -		DRM_DEV_ERROR(dsi->dev,
> -			      "too long tx buf length %zu for short write\n",
> -			      msg->tx_len);
> -		return -EINVAL;
> -	}
> -
> -	val = GEN_HDATA(data) | GEN_HTYPE(msg->type);
> -	return dw_mipi_dsi_gen_pkt_hdr_write(dsi, val);
> -}
> -
> -static int dw_mipi_dsi_dcs_long_write(struct dw_mipi_dsi *dsi,
> -				      const struct mipi_dsi_msg *msg)
> -{
> -	const u8 *tx_buf = msg->tx_buf;
> -	int len = msg->tx_len, pld_data_bytes = sizeof(u32), ret;
> -	u32 hdr_val = GEN_HDATA(msg->tx_len) | GEN_HTYPE(msg->type);
> -	u32 remainder;
> -	u32 val;
> -
> -	if (msg->tx_len < 3) {
> -		DRM_DEV_ERROR(dsi->dev,
> -			      "wrong tx buf length %zu for long write\n",
> -			      msg->tx_len);
> -		return -EINVAL;
> -	}
> -
> -	while (DIV_ROUND_UP(len, pld_data_bytes)) {
> -		if (len < pld_data_bytes) {
> -			remainder = 0;
> -			memcpy(&remainder, tx_buf, len);
> -			dsi_write(dsi, DSI_GEN_PLD_DATA, remainder);
> -			len = 0;
> -		} else {
> -			memcpy(&remainder, tx_buf, pld_data_bytes);
> -			dsi_write(dsi, DSI_GEN_PLD_DATA, remainder);
> -			tx_buf += pld_data_bytes;
> -			len -= pld_data_bytes;
> -		}
> -
> -		ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
> -					 val, !(val & GEN_PLD_W_FULL), 1000,
> -					 CMD_PKT_STATUS_TIMEOUT_US);
> -		if (ret < 0) {
> -			DRM_DEV_ERROR(dsi->dev,
> -				      "failed to get available write payload FIFO\n");
> -			return ret;
> -		}
> -	}
> -
> -	return dw_mipi_dsi_gen_pkt_hdr_write(dsi, hdr_val);
> -}
> -
> -static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host,
> -					 const struct mipi_dsi_msg *msg)
> -{
> -	struct dw_mipi_dsi *dsi = host_to_dsi(host);
> -	int ret;
> -
> -	dw_mipi_message_config(dsi, msg);
> -
> -	switch (msg->type) {
> -	case MIPI_DSI_DCS_SHORT_WRITE:
> -	case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
> -	case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE:
> -		ret = dw_mipi_dsi_dcs_short_write(dsi, msg);
> -		break;
> -	case MIPI_DSI_DCS_LONG_WRITE:
> -		ret = dw_mipi_dsi_dcs_long_write(dsi, msg);
> -		break;
> -	default:
> -		DRM_DEV_ERROR(dsi->dev, "unsupported message type 0x%02x\n",
> -			      msg->type);
> -		ret = -EINVAL;
> -	}
> -
> -	return ret;
> -}
> -
> -static const struct mipi_dsi_host_ops dw_mipi_dsi_host_ops = {
> -	.attach = dw_mipi_dsi_host_attach,
> -	.detach = dw_mipi_dsi_host_detach,
> -	.transfer = dw_mipi_dsi_host_transfer,
> -};
> -
> -static void dw_mipi_dsi_video_mode_config(struct dw_mipi_dsi *dsi)
> -{
> -	u32 val;
> -
> -	val = ENABLE_LOW_POWER;
> -
> -	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
> -		val |= VID_MODE_TYPE_BURST;
> -	else if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
> -		val |= VID_MODE_TYPE_NON_BURST_SYNC_PULSES;
> -	else
> -		val |= VID_MODE_TYPE_NON_BURST_SYNC_EVENTS;
> -
> -	dsi_write(dsi, DSI_VID_MODE_CFG, val);
> -}
> -
> -static void dw_mipi_dsi_set_mode(struct dw_mipi_dsi *dsi,
> -				 enum dw_mipi_dsi_mode mode)
> -{
> -	if (mode == DW_MIPI_DSI_CMD_MODE) {
> -		dsi_write(dsi, DSI_PWR_UP, RESET);
> -		dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE);
> -		dsi_write(dsi, DSI_PWR_UP, POWERUP);
> -	} else {
> -		dsi_write(dsi, DSI_PWR_UP, RESET);
> -		dsi_write(dsi, DSI_MODE_CFG, ENABLE_VIDEO_MODE);
> -		dw_mipi_dsi_video_mode_config(dsi);
> -		dsi_write(dsi, DSI_LPCLK_CTRL, PHY_TXREQUESTCLKHS);
> -		dsi_write(dsi, DSI_PWR_UP, POWERUP);
> -	}
> -}
> -
> -static void dw_mipi_dsi_disable(struct dw_mipi_dsi *dsi)
> -{
> -	dsi_write(dsi, DSI_PWR_UP, RESET);
> -	dsi_write(dsi, DSI_PHY_RSTZ, PHY_RSTZ);
> -}
> -
> -static void dw_mipi_dsi_init(struct dw_mipi_dsi *dsi)
> -{
> -	/*
> -	 * The maximum permitted escape clock is 20MHz and it is derived from
> -	 * lanebyteclk, which is running at "lane_mbps / 8".  Thus we want:
> -	 *
> -	 *     (lane_mbps >> 3) / esc_clk_division < 20
> -	 * which is:
> -	 *     (lane_mbps >> 3) / 20 > esc_clk_division
> -	 */
> -	u32 esc_clk_division = (dsi->lane_mbps >> 3) / 20 + 1;
> -
> -	dsi_write(dsi, DSI_PWR_UP, RESET);
> -	dsi_write(dsi, DSI_PHY_RSTZ, PHY_DISFORCEPLL | PHY_DISABLECLK
> -		  | PHY_RSTZ | PHY_SHUTDOWNZ);
> -	dsi_write(dsi, DSI_CLKMGR_CFG, TO_CLK_DIVIDSION(10) |
> -		  TX_ESC_CLK_DIVIDSION(esc_clk_division));
> -}
> -
> -static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi,
> -				   struct drm_display_mode *mode)
> -{
> -	u32 val = 0, color = 0;
> -
> -	switch (dsi->format) {
> -	case MIPI_DSI_FMT_RGB888:
> -		color = DPI_COLOR_CODING_24BIT;
> -		break;
> -	case MIPI_DSI_FMT_RGB666:
> -		color = DPI_COLOR_CODING_18BIT_2 | EN18_LOOSELY;
> -		break;
> -	case MIPI_DSI_FMT_RGB666_PACKED:
> -		color = DPI_COLOR_CODING_18BIT_1;
> -		break;
> -	case MIPI_DSI_FMT_RGB565:
> -		color = DPI_COLOR_CODING_16BIT_1;
> -		break;
> -	}
> -
> -	if (mode->flags & DRM_MODE_FLAG_NVSYNC)
> -		val |= VSYNC_ACTIVE_LOW;
> -	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
> -		val |= HSYNC_ACTIVE_LOW;
> -
> -	dsi_write(dsi, DSI_DPI_VCID, DPI_VID(dsi->channel));
> -	dsi_write(dsi, DSI_DPI_COLOR_CODING, color);
> -	dsi_write(dsi, DSI_DPI_CFG_POL, val);
> -	dsi_write(dsi, DSI_DPI_LP_CMD_TIM, OUTVACT_LPCMD_TIME(4)
> -		  | INVACT_LPCMD_TIME(4));
> -}
> -
> -static void dw_mipi_dsi_packet_handler_config(struct dw_mipi_dsi *dsi)
> -{
> -	dsi_write(dsi, DSI_PCKHDL_CFG, EN_CRC_RX | EN_ECC_RX | EN_BTA);
> -}
> -
> -static void dw_mipi_dsi_video_packet_config(struct dw_mipi_dsi *dsi,
> -					    struct drm_display_mode *mode)
> -{
> -	dsi_write(dsi, DSI_VID_PKT_SIZE, VID_PKT_SIZE(mode->hdisplay));
> -}
> -
> -static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi)
> -{
> -	dsi_write(dsi, DSI_TO_CNT_CFG, HSTX_TO_CNT(1000) | LPRX_TO_CNT(1000));
> -	dsi_write(dsi, DSI_BTA_TO_CNT, 0xd00);
> -	dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE);
> -}
> -
> -/* Get lane byte clock cycles. */
> -static u32 dw_mipi_dsi_get_hcomponent_lbcc(struct dw_mipi_dsi *dsi,
> -					   struct drm_display_mode *mode,
> -					   u32 hcomponent)
> -{
> -	u32 frac, lbcc;
> -
> -	lbcc = hcomponent * dsi->lane_mbps * MSEC_PER_SEC / 8;
> -
> -	frac = lbcc % mode->clock;
> -	lbcc = lbcc / mode->clock;
> -	if (frac)
> -		lbcc++;
> -
> -	return lbcc;
> -}
> -
> -static void dw_mipi_dsi_line_timer_config(struct dw_mipi_dsi *dsi,
> -					  struct drm_display_mode *mode)
> -{
> -	u32 htotal, hsa, hbp, lbcc;
> -
> -	htotal = mode->htotal;
> -	hsa = mode->hsync_end - mode->hsync_start;
> -	hbp = mode->htotal - mode->hsync_end;
> -
> -	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, htotal);
> -	dsi_write(dsi, DSI_VID_HLINE_TIME, lbcc);
> -
> -	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, hsa);
> -	dsi_write(dsi, DSI_VID_HSA_TIME, lbcc);
> -
> -	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, hbp);
> -	dsi_write(dsi, DSI_VID_HBP_TIME, lbcc);
> -}
> -
> -static void dw_mipi_dsi_vertical_timing_config(struct dw_mipi_dsi *dsi,
> -					       struct drm_display_mode *mode)
> -{
> -	u32 vactive, vsa, vfp, vbp;
> -
> -	vactive = mode->vdisplay;
> -	vsa = mode->vsync_end - mode->vsync_start;
> -	vfp = mode->vsync_start - mode->vdisplay;
> -	vbp = mode->vtotal - mode->vsync_end;
> -
> -	dsi_write(dsi, DSI_VID_VACTIVE_LINES, vactive);
> -	dsi_write(dsi, DSI_VID_VSA_LINES, vsa);
> -	dsi_write(dsi, DSI_VID_VFP_LINES, vfp);
> -	dsi_write(dsi, DSI_VID_VBP_LINES, vbp);
> -}
> -
> -static void dw_mipi_dsi_dphy_timing_config(struct dw_mipi_dsi *dsi)
> -{
> -	dsi_write(dsi, DSI_PHY_TMR_CFG, PHY_HS2LP_TIME(0x40)
> -		  | PHY_LP2HS_TIME(0x40) | MAX_RD_TIME(10000));
> -
> -	dsi_write(dsi, DSI_PHY_TMR_LPCLK_CFG, PHY_CLKHS2LP_TIME(0x40)
> -		  | PHY_CLKLP2HS_TIME(0x40));
> -}
> -
> -static void dw_mipi_dsi_dphy_interface_config(struct dw_mipi_dsi *dsi)
> -{
> -	dsi_write(dsi, DSI_PHY_IF_CFG, PHY_STOP_WAIT_TIME(0x20) |
> -		  N_LANES(dsi->lanes));
> -}
> -
> -static void dw_mipi_dsi_clear_err(struct dw_mipi_dsi *dsi)
> -{
> -	dsi_read(dsi, DSI_INT_ST0);
> -	dsi_read(dsi, DSI_INT_ST1);
> -	dsi_write(dsi, DSI_INT_MSK0, 0);
> -	dsi_write(dsi, DSI_INT_MSK1, 0);
> -}
> -
> -static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
> -{
> -	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
> -
> -	if (dsi->dpms_mode != DRM_MODE_DPMS_ON)
> -		return;
> -
> -	if (clk_prepare_enable(dsi->pclk)) {
> -		DRM_DEV_ERROR(dsi->dev, "Failed to enable pclk\n");
> -		return;
> -	}
> -
> -	drm_panel_disable(dsi->panel);
> -
> -	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_CMD_MODE);
> -	drm_panel_unprepare(dsi->panel);
> -
> -	dw_mipi_dsi_disable(dsi);
> -	pm_runtime_put(dsi->dev);
> -	clk_disable_unprepare(dsi->pclk);
> -	dsi->dpms_mode = DRM_MODE_DPMS_OFF;
> -}
> -
> -static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
> -{
> -	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
> -	struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
> -	const struct dw_mipi_dsi_plat_data *pdata = dsi->pdata;
> -	int mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node, encoder);
> -	u32 val;
> -	int ret;
> -
> -	ret = dw_mipi_dsi_get_lane_bps(dsi, mode);
> -	if (ret < 0)
> -		return;
> -
> -	if (dsi->dpms_mode == DRM_MODE_DPMS_ON)
> -		return;
> -
> -	if (clk_prepare_enable(dsi->pclk)) {
> -		DRM_DEV_ERROR(dsi->dev, "Failed to enable pclk\n");
> -		return;
> -	}
> -
> -	pm_runtime_get_sync(dsi->dev);
> -	dw_mipi_dsi_init(dsi);
> -	dw_mipi_dsi_dpi_config(dsi, mode);
> -	dw_mipi_dsi_packet_handler_config(dsi);
> -	dw_mipi_dsi_video_mode_config(dsi);
> -	dw_mipi_dsi_video_packet_config(dsi, mode);
> -	dw_mipi_dsi_command_mode_config(dsi);
> -	dw_mipi_dsi_line_timer_config(dsi, mode);
> -	dw_mipi_dsi_vertical_timing_config(dsi, mode);
> -	dw_mipi_dsi_dphy_timing_config(dsi);
> -	dw_mipi_dsi_dphy_interface_config(dsi);
> -	dw_mipi_dsi_clear_err(dsi);
> -
> -	/*
> -	 * For the RK3399, the clk of grf must be enabled before writing grf
> -	 * register. And for RK3288 or other soc, this grf_clk must be NULL,
> -	 * the clk_prepare_enable return true directly.
> -	 */
> -	ret = clk_prepare_enable(dsi->grf_clk);
> -	if (ret) {
> -		DRM_DEV_ERROR(dsi->dev, "Failed to enable grf_clk: %d\n", ret);
> -		return;
> -	}
> -
> -	if (pdata->grf_dsi0_mode_reg)
> -		regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
> -			     pdata->grf_dsi0_mode);
> -
> -	dw_mipi_dsi_phy_init(dsi);
> -	dw_mipi_dsi_wait_for_two_frames(mode);
> -
> -	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_CMD_MODE);
> -	if (drm_panel_prepare(dsi->panel))
> -		DRM_DEV_ERROR(dsi->dev, "failed to prepare panel\n");
> -
> -	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_VID_MODE);
> -	drm_panel_enable(dsi->panel);
> -
> -	clk_disable_unprepare(dsi->pclk);
> -
> -	if (mux)
> -		val = pdata->dsi0_en_bit | (pdata->dsi0_en_bit << 16);
> -	else
> -		val = pdata->dsi0_en_bit << 16;
> -
> -	regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
> -	DRM_DEV_DEBUG(dsi->dev,
> -		      "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG");
> -	dsi->dpms_mode = DRM_MODE_DPMS_ON;
> -
> -	clk_disable_unprepare(dsi->grf_clk);
> -}
> -
> -static int
> -dw_mipi_dsi_encoder_atomic_check(struct drm_encoder *encoder,
> -				 struct drm_crtc_state *crtc_state,
> -				 struct drm_connector_state *conn_state)
> -{
> -	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
> -	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
> -
> -	switch (dsi->format) {
> -	case MIPI_DSI_FMT_RGB888:
> -		s->output_mode = ROCKCHIP_OUT_MODE_P888;
> -		break;
> -	case MIPI_DSI_FMT_RGB666:
> -		s->output_mode = ROCKCHIP_OUT_MODE_P666;
> -		break;
> -	case MIPI_DSI_FMT_RGB565:
> -		s->output_mode = ROCKCHIP_OUT_MODE_P565;
> -		break;
> -	default:
> -		WARN_ON(1);
> -		return -EINVAL;
> -	}
> -
> -	s->output_type = DRM_MODE_CONNECTOR_DSI;
> -
> -	return 0;
> -}
> -
> -static const struct drm_encoder_helper_funcs
> -dw_mipi_dsi_encoder_helper_funcs = {
> -	.enable = dw_mipi_dsi_encoder_enable,
> -	.disable = dw_mipi_dsi_encoder_disable,
> -	.atomic_check = dw_mipi_dsi_encoder_atomic_check,
> -};
> -
> -static const struct drm_encoder_funcs dw_mipi_dsi_encoder_funcs = {
> -	.destroy = drm_encoder_cleanup,
> -};
> -
> -static int dw_mipi_dsi_connector_get_modes(struct drm_connector *connector)
> -{
> -	struct dw_mipi_dsi *dsi = con_to_dsi(connector);
> -
> -	return drm_panel_get_modes(dsi->panel);
> -}
> -
> -static struct drm_connector_helper_funcs dw_mipi_dsi_connector_helper_funcs = {
> -	.get_modes = dw_mipi_dsi_connector_get_modes,
> -};
> -
> -static void dw_mipi_dsi_drm_connector_destroy(struct drm_connector *connector)
> -{
> -	drm_connector_unregister(connector);
> -	drm_connector_cleanup(connector);
> -}
> -
> -static const struct drm_connector_funcs dw_mipi_dsi_atomic_connector_funcs = {
> -	.fill_modes = drm_helper_probe_single_connector_modes,
> -	.destroy = dw_mipi_dsi_drm_connector_destroy,
> -	.reset = drm_atomic_helper_connector_reset,
> -	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> -	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> -};
> -
> -static int dw_mipi_dsi_register(struct drm_device *drm,
> -				struct dw_mipi_dsi *dsi)
> -{
> -	struct drm_encoder *encoder = &dsi->encoder;
> -	struct drm_connector *connector = &dsi->connector;
> -	struct device *dev = dsi->dev;
> -	int ret;
> -
> -	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm,
> -							     dev->of_node);
> -	/*
> -	 * If we failed to find the CRTC(s) which this encoder is
> -	 * supposed to be connected to, it's because the CRTC has
> -	 * not been registered yet.  Defer probing, and hope that
> -	 * the required CRTC is added later.
> -	 */
> -	if (encoder->possible_crtcs == 0)
> -		return -EPROBE_DEFER;
> -
> -	drm_encoder_helper_add(&dsi->encoder,
> -			       &dw_mipi_dsi_encoder_helper_funcs);
> -	ret = drm_encoder_init(drm, &dsi->encoder, &dw_mipi_dsi_encoder_funcs,
> -			       DRM_MODE_ENCODER_DSI, NULL);
> -	if (ret) {
> -		DRM_DEV_ERROR(dev, "Failed to initialize encoder with drm\n");
> -		return ret;
> -	}
> -
> -	drm_connector_helper_add(connector,
> -				 &dw_mipi_dsi_connector_helper_funcs);
> -
> -	drm_connector_init(drm, &dsi->connector,
> -			   &dw_mipi_dsi_atomic_connector_funcs,
> -			   DRM_MODE_CONNECTOR_DSI);
> -
> -	drm_mode_connector_attach_encoder(connector, encoder);
> -
> -	return 0;
> -}
> -
> -static int rockchip_mipi_parse_dt(struct dw_mipi_dsi *dsi)
> -{
> -	struct device_node *np = dsi->dev->of_node;
> -
> -	dsi->grf_regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
> -	if (IS_ERR(dsi->grf_regmap)) {
> -		DRM_DEV_ERROR(dsi->dev, "Unable to get rockchip,grf\n");
> -		return PTR_ERR(dsi->grf_regmap);
> -	}
> -
> -	return 0;
> -}
> -
> -static struct dw_mipi_dsi_plat_data rk3288_mipi_dsi_drv_data = {
> -	.dsi0_en_bit = RK3288_DSI0_SEL_VOP_LIT,
> -	.dsi1_en_bit = RK3288_DSI1_SEL_VOP_LIT,
> -	.grf_switch_reg = RK3288_GRF_SOC_CON6,
> -	.max_data_lanes = 4,
> -};
> -
> -static struct dw_mipi_dsi_plat_data rk3399_mipi_dsi_drv_data = {
> -	.dsi0_en_bit = RK3399_DSI0_SEL_VOP_LIT,
> -	.dsi1_en_bit = RK3399_DSI1_SEL_VOP_LIT,
> -	.grf_switch_reg = RK3399_GRF_SOC_CON20,
> -	.grf_dsi0_mode = RK3399_GRF_DSI_MODE,
> -	.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
> -	.flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK,
> -	.max_data_lanes = 4,
> -};
> -
> -static const struct of_device_id dw_mipi_dsi_dt_ids[] = {
> -	{
> -	 .compatible = "rockchip,rk3288-mipi-dsi",
> -	 .data = &rk3288_mipi_dsi_drv_data,
> -	}, {
> -	 .compatible = "rockchip,rk3399-mipi-dsi",
> -	 .data = &rk3399_mipi_dsi_drv_data,
> -	},
> -	{ /* sentinel */ }
> -};
> -MODULE_DEVICE_TABLE(of, dw_mipi_dsi_dt_ids);
> -
> -static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
> -			    void *data)
> -{
> -	const struct of_device_id *of_id =
> -			of_match_device(dw_mipi_dsi_dt_ids, dev);
> -	const struct dw_mipi_dsi_plat_data *pdata = of_id->data;
> -	struct platform_device *pdev = to_platform_device(dev);
> -	struct reset_control *apb_rst;
> -	struct drm_device *drm = data;
> -	struct dw_mipi_dsi *dsi;
> -	struct resource *res;
> -	int ret;
> -
> -	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
> -	if (!dsi)
> -		return -ENOMEM;
> -
> -	dsi->dev = dev;
> -	dsi->pdata = pdata;
> -	dsi->dpms_mode = DRM_MODE_DPMS_OFF;
> -
> -	ret = rockchip_mipi_parse_dt(dsi);
> -	if (ret)
> -		return ret;
> -
> -	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	if (!res)
> -		return -ENODEV;
> -
> -	dsi->base = devm_ioremap_resource(dev, res);
> -	if (IS_ERR(dsi->base))
> -		return PTR_ERR(dsi->base);
> -
> -	dsi->pllref_clk = devm_clk_get(dev, "ref");
> -	if (IS_ERR(dsi->pllref_clk)) {
> -		ret = PTR_ERR(dsi->pllref_clk);
> -		DRM_DEV_ERROR(dev,
> -			      "Unable to get pll reference clock: %d\n", ret);
> -		return ret;
> -	}
> -
> -	dsi->pclk = devm_clk_get(dev, "pclk");
> -	if (IS_ERR(dsi->pclk)) {
> -		ret = PTR_ERR(dsi->pclk);
> -		DRM_DEV_ERROR(dev, "Unable to get pclk: %d\n", ret);
> -		return ret;
> -	}
> -
> -	/*
> -	 * Note that the reset was not defined in the initial device tree, so
> -	 * we have to be prepared for it not being found.
> -	 */
> -	apb_rst = devm_reset_control_get(dev, "apb");
> -	if (IS_ERR(apb_rst)) {
> -		ret = PTR_ERR(apb_rst);
> -		if (ret == -ENOENT) {
> -			apb_rst = NULL;
> -		} else {
> -			DRM_DEV_ERROR(dev,
> -				      "Unable to get reset control: %d\n", ret);
> -			return ret;
> -		}
> -	}
> -
> -	if (apb_rst) {
> -		ret = clk_prepare_enable(dsi->pclk);
> -		if (ret) {
> -			DRM_DEV_ERROR(dev, "Failed to enable pclk\n");
> -			return ret;
> -		}
> -
> -		reset_control_assert(apb_rst);
> -		usleep_range(10, 20);
> -		reset_control_deassert(apb_rst);
> -
> -		clk_disable_unprepare(dsi->pclk);
> -	}
> -
> -	if (pdata->flags & DW_MIPI_NEEDS_PHY_CFG_CLK) {
> -		dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
> -		if (IS_ERR(dsi->phy_cfg_clk)) {
> -			ret = PTR_ERR(dsi->phy_cfg_clk);
> -			DRM_DEV_ERROR(dev,
> -				      "Unable to get phy_cfg_clk: %d\n", ret);
> -			return ret;
> -		}
> -	}
> -
> -	if (pdata->flags & DW_MIPI_NEEDS_GRF_CLK) {
> -		dsi->grf_clk = devm_clk_get(dev, "grf");
> -		if (IS_ERR(dsi->grf_clk)) {
> -			ret = PTR_ERR(dsi->grf_clk);
> -			DRM_DEV_ERROR(dev, "Unable to get grf_clk: %d\n", ret);
> -			return ret;
> -		}
> -	}
> -
> -	ret = clk_prepare_enable(dsi->pllref_clk);
> -	if (ret) {
> -		DRM_DEV_ERROR(dev, "Failed to enable pllref_clk\n");
> -		return ret;
> -	}
> -
> -	ret = dw_mipi_dsi_register(drm, dsi);
> -	if (ret) {
> -		DRM_DEV_ERROR(dev, "Failed to register mipi_dsi: %d\n", ret);
> -		goto err_pllref;
> -	}
> -
> -	pm_runtime_enable(dev);
> -
> -	dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
> -	dsi->dsi_host.dev = dev;
> -	ret = mipi_dsi_host_register(&dsi->dsi_host);
> -	if (ret) {
> -		DRM_DEV_ERROR(dev, "Failed to register MIPI host: %d\n", ret);
> -		goto err_cleanup;
> -	}
> -
> -	if (!dsi->panel) {
> -		ret = -EPROBE_DEFER;
> -		goto err_mipi_dsi_host;
> -	}
> -
> -	dev_set_drvdata(dev, dsi);
> -	return 0;
> -
> -err_mipi_dsi_host:
> -	mipi_dsi_host_unregister(&dsi->dsi_host);
> -err_cleanup:
> -	drm_encoder_cleanup(&dsi->encoder);
> -	drm_connector_cleanup(&dsi->connector);
> -err_pllref:
> -	clk_disable_unprepare(dsi->pllref_clk);
> -	return ret;
> -}
> -
> -static void dw_mipi_dsi_unbind(struct device *dev, struct device *master,
> -			       void *data)
> -{
> -	struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
> -
> -	mipi_dsi_host_unregister(&dsi->dsi_host);
> -	pm_runtime_disable(dev);
> -	clk_disable_unprepare(dsi->pllref_clk);
> -}
> -
> -static const struct component_ops dw_mipi_dsi_ops = {
> -	.bind	= dw_mipi_dsi_bind,
> -	.unbind	= dw_mipi_dsi_unbind,
> -};
> -
> -static int dw_mipi_dsi_probe(struct platform_device *pdev)
> -{
> -	return component_add(&pdev->dev, &dw_mipi_dsi_ops);
> -}
> -
> -static int dw_mipi_dsi_remove(struct platform_device *pdev)
> -{
> -	component_del(&pdev->dev, &dw_mipi_dsi_ops);
> -	return 0;
> -}
> -
> -struct platform_driver dw_mipi_dsi_driver = {
> -	.probe		= dw_mipi_dsi_probe,
> -	.remove		= dw_mipi_dsi_remove,
> -	.driver		= {
> -		.of_match_table = dw_mipi_dsi_dt_ids,
> -		.name	= DRIVER_NAME,
> -	},
> -};
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
> new file mode 100644
> index 0000000..c682ed2
> --- /dev/null
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
> @@ -0,0 +1,764 @@
> +/*
> + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
> + * Author:
> + *      Chris Zhong <zyw@rock-chips.com>
> + *      Nickey Yang <nickey.yang@rock-chips.com>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> + *
> + * License terms:  GNU General Public License (GPL), version 2
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/iopoll.h>
> +#include <linux/math64.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <drm/drmP.h>
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/bridge/dw_mipi_dsi.h>
> +#include <video/mipi_display.h>
> +#include <linux/regmap.h>
> +#include <drm/drm_of.h>
> +#include <linux/mfd/syscon.h>
> +
> +#include "rockchip_drm_drv.h"
> +#include "rockchip_drm_vop.h"
> +
> +#define DSI_PHY_TST_CTRL0		0xb4
> +#define PHY_TESTCLK			BIT(1)
> +#define PHY_UNTESTCLK			0
> +#define PHY_TESTCLR			BIT(0)
> +#define PHY_UNTESTCLR			0
> +
> +#define DSI_PHY_TST_CTRL1		0xb8
> +#define PHY_TESTEN			BIT(16)
> +#define PHY_UNTESTEN			0
> +#define PHY_TESTDOUT(n)			(((n) & 0xff) << 8)
> +#define PHY_TESTDIN(n)			(((n) & 0xff) << 0)
> +
> +#define BYPASS_VCO_RANGE	BIT(7)
> +#define VCO_RANGE_CON_SEL(val)	(((val) & 0x7) << 3)
> +#define VCO_IN_CAP_CON_DEFAULT	(0x0 << 1)
> +#define VCO_IN_CAP_CON_LOW	(0x1 << 1)
> +#define VCO_IN_CAP_CON_HIGH	(0x2 << 1)
> +#define REF_BIAS_CUR_SEL	BIT(0)
> +
> +#define CP_CURRENT_3UA	0x1
> +#define CP_CURRENT_4_5UA	0x2
> +#define CP_CURRENT_7_5UA	0x6
> +#define CP_CURRENT_6UA	0x9
> +#define CP_CURRENT_12UA	0xb
> +#define CP_CURRENT_SEL(val)	((val) & 0xf)
> +#define CP_PROGRAM_EN		BIT(7)
> +
> +#define LPF_RESISTORS_15_5KOHM	0x1
> +#define LPF_RESISTORS_13KOHM	0x2
> +#define LPF_RESISTORS_11_5KOHM	0x4
> +#define LPF_RESISTORS_10_5KOHM	0x8
> +#define LPF_RESISTORS_8KOHM	0x10
> +#define LPF_PROGRAM_EN		BIT(6)
> +#define LPF_RESISTORS_SEL(val)	((val) & 0x3f)
> +
> +#define HSFREQRANGE_SEL(val)	(((val) & 0x3f) << 1)
> +
> +#define INPUT_DIVIDER(val)	(((val) - 1) & 0x7f)
> +#define LOW_PROGRAM_EN		0
> +#define HIGH_PROGRAM_EN		BIT(7)
> +#define LOOP_DIV_LOW_SEL(val)	(((val) - 1) & 0x1f)
> +#define LOOP_DIV_HIGH_SEL(val)	((((val) - 1) >> 5) & 0xf)
> +#define PLL_LOOP_DIV_EN		BIT(5)
> +#define PLL_INPUT_DIV_EN	BIT(4)
> +
> +#define POWER_CONTROL		BIT(6)
> +#define INTERNAL_REG_CURRENT	BIT(3)
> +#define BIAS_BLOCK_ON		BIT(2)
> +#define BANDGAP_ON		BIT(0)
> +
> +#define TER_RESISTOR_HIGH	BIT(7)
> +#define	TER_RESISTOR_LOW	0
> +#define LEVEL_SHIFTERS_ON	BIT(6)
> +#define TER_CAL_DONE		BIT(5)
> +#define SETRD_MAX		(0x7 << 2)
> +#define POWER_MANAGE		BIT(1)
> +#define TER_RESISTORS_ON	BIT(0)
> +
> +#define BIASEXTR_SEL(val)	((val) & 0x7)
> +#define BANDGAP_SEL(val)	((val) & 0x7)
> +#define TLP_PROGRAM_EN		BIT(7)
> +#define THS_PRE_PROGRAM_EN	BIT(7)
> +#define THS_ZERO_PROGRAM_EN	BIT(6)
> +
> +#define PLL_BIAS_CUR_SEL_CAP_VCO_CONTROL	0x10
> +#define PLL_CP_CONTROL_PLL_LOCK_BYPASS	0x11
> +#define PLL_LPF_AND_CP_CONTROL	0x12
> +#define PLL_INPUT_DIVIDER_RATIO	0x17
> +#define PLL_LOOP_DIVIDER_RATIO	0x18
> +#define PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL	0x19
> +#define BANDGAP_AND_BIAS_CONTROL	0x20
> +#define TERMINATION_RESISTER_CONTROL	0x21
> +#define AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY	0x22
> +#define HS_RX_CONTROL_OF_LANE_0	0x44
> +#define HS_TX_CLOCK_LANE_REQUEST_STATE_TIME_CONTROL	0x60
> +#define HS_TX_CLOCK_LANE_PREPARE_STATE_TIME_CONTROL	0x61
> +#define HS_TX_CLOCK_LANE_HS_ZERO_STATE_TIME_CONTROL	0x62
> +#define HS_TX_CLOCK_LANE_TRAIL_STATE_TIME_CONTROL	0x63
> +#define HS_TX_CLOCK_LANE_EXIT_STATE_TIME_CONTROL	0x64
> +#define HS_TX_CLOCK_LANE_POST_TIME_CONTROL	0x65
> +#define HS_TX_DATA_LANE_REQUEST_STATE_TIME_CONTROL	0x70
> +#define HS_TX_DATA_LANE_PREPARE_STATE_TIME_CONTROL	0x71
> +#define HS_TX_DATA_LANE_HS_ZERO_STATE_TIME_CONTROL	0x72
> +#define HS_TX_DATA_LANE_TRAIL_STATE_TIME_CONTROL	0x73
> +#define HS_TX_DATA_LANE_EXIT_STATE_TIME_CONTROL	0x74
> +
> +#define DW_MIPI_NEEDS_PHY_CFG_CLK	BIT(0)
> +#define DW_MIPI_NEEDS_GRF_CLK		BIT(1)
> +
> +#define RK3288_GRF_SOC_CON6		0x025c
> +#define RK3288_DSI0_SEL_VOP_LIT		BIT(6)
> +#define RK3288_DSI1_SEL_VOP_LIT		BIT(9)
> +
> +#define RK3399_GRF_SOC_CON20		0x6250
> +#define RK3399_DSI0_SEL_VOP_LIT		BIT(0)
> +#define RK3399_DSI1_SEL_VOP_LIT		BIT(4)
> +
> +/* disable turnrequest, turndisable, forcetxstopmode, forcerxmode */
> +#define RK3399_GRF_SOC_CON22		0x6258
> +#define RK3399_GRF_DSI_MODE		0xffff0000
> +
> +#define to_dsi(nm)	container_of(nm, struct dw_mipi_dsi_rockchip, nm)
> +
> +enum {
> +	BANDGAP_97_07,
> +	BANDGAP_98_05,
> +	BANDGAP_99_02,
> +	BANDGAP_100_00,
> +	BANDGAP_93_17,
> +	BANDGAP_94_15,
> +	BANDGAP_95_12,
> +	BANDGAP_96_10,
> +};
> +
> +enum {
> +	BIASEXTR_87_1,
> +	BIASEXTR_91_5,
> +	BIASEXTR_95_9,
> +	BIASEXTR_100,
> +	BIASEXTR_105_94,
> +	BIASEXTR_111_88,
> +	BIASEXTR_118_8,
> +	BIASEXTR_127_7,
> +};
> +
> +struct rockchip_dw_dsi_chip_data {
> +	u32 dsi0_en_bit;
> +	u32 dsi1_en_bit;
> +	u32 grf_switch_reg;
> +	u32 grf_dsi0_mode;
> +	u32 grf_dsi0_mode_reg;
> +	unsigned int flags;
> +	unsigned int max_data_lanes;
> +};
> +
> +struct dw_mipi_dsi_rockchip {
> +	struct device *dev;
> +	struct drm_encoder encoder;
> +	void __iomem *base;
> +
> +	struct regmap *grf_regmap;
> +	struct clk *pllref_clk;
> +	struct clk *grf_clk;
> +	struct clk *phy_cfg_clk;
> +
> +	unsigned int lane_mbps; /* per lane */
> +	u16 input_div;
> +	u16 feedback_div;
> +	u32 format;
> +
> +	struct dw_mipi_dsi *dmd;
> +	const struct rockchip_dw_dsi_chip_data *cdata;
> +	struct dw_mipi_dsi_plat_data pdata;
> +};
> +
> +struct dphy_pll_parameter_map {
> +	unsigned int max_mbps;
> +	u8 hsfreqrange;
> +	u8 icpctrl;
> +	u8 lpfctrl;
> +};
> +
> +/* The table is based on 27MHz DPHY pll reference clock. */
> +static const struct dphy_pll_parameter_map dppa_map[] = {
> +	{  89, 0x00, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
> +	{  99, 0x10, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
> +	{ 109, 0x20, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
> +	{ 129, 0x01, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
> +	{ 139, 0x11, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
> +	{ 149, 0x21, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
> +	{ 169, 0x02, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
> +	{ 179, 0x12, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
> +	{ 199, 0x22, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
> +	{ 219, 0x03, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
> +	{ 239, 0x13, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
> +	{ 249, 0x23, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
> +	{ 269, 0x04, CP_CURRENT_6UA, LPF_RESISTORS_11_5KOHM },
> +	{ 299, 0x14, CP_CURRENT_6UA, LPF_RESISTORS_11_5KOHM },
> +	{ 329, 0x05, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
> +	{ 359, 0x15, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
> +	{ 399, 0x25, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
> +	{ 449, 0x06, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
> +	{ 499, 0x16, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
> +	{ 549, 0x07, CP_CURRENT_7_5UA, LPF_RESISTORS_10_5KOHM },
> +	{ 599, 0x17, CP_CURRENT_7_5UA, LPF_RESISTORS_10_5KOHM },
> +	{ 649, 0x08, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
> +	{ 699, 0x18, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
> +	{ 749, 0x09, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
> +	{ 799, 0x19, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
> +	{ 849, 0x29, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
> +	{ 899, 0x39, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
> +	{ 949, 0x0a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
> +	{ 999, 0x1a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
> +	{1049, 0x2a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
> +	{1099, 0x3a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
> +	{1149, 0x0b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
> +	{1199, 0x1b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
> +	{1249, 0x2b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
> +	{1299, 0x3b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
> +	{1349, 0x0c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
> +	{1399, 0x1c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
> +	{1449, 0x2c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
> +	{1500, 0x3c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM }
> +};
> +
> +static int max_mbps_to_parameter(unsigned int max_mbps)
> +{
> +	int i;
> +
> +	for (i = 0; i < ARRAY_SIZE(dppa_map); i++)
> +		if (dppa_map[i].max_mbps >= max_mbps)
> +			return i;
> +
> +	return -EINVAL;
> +}
> +
> +static inline void dsi_write(struct dw_mipi_dsi_rockchip *dsi, u32 reg, u32 val)
> +{
> +	writel(val, dsi->base + reg);
> +}
> +
> +static inline u32 dsi_read(struct dw_mipi_dsi_rockchip *dsi, u32 reg)
> +{
> +	return readl(dsi->base + reg);
> +}
> +
> +static inline void dsi_set(struct dw_mipi_dsi_rockchip *dsi, u32 reg, u32 mask)
> +{
> +	dsi_write(dsi, reg, dsi_read(dsi, reg) | mask);
> +}
> +
> +static inline void dsi_update_bits(struct dw_mipi_dsi_rockchip *dsi, u32 reg,
> +				   u32 mask, u32 val)
> +{
> +	dsi_write(dsi, reg, (dsi_read(dsi, reg) & ~mask) | val);
> +}
> +
> +static void dw_mipi_dsi_phy_write(struct dw_mipi_dsi_rockchip *dsi,
> +				  u8 test_code,
> +				  u8 test_data)
> +{
> +	/*
> +	 * With the falling edge on TESTCLK, the TESTDIN[7:0] signal content
> +	 * is latched internally as the current test code. Test data is
> +	 * programmed internally by rising edge on TESTCLK.
> +	 */
> +	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
> +
> +	dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_TESTEN | PHY_TESTDOUT(0) |
> +					  PHY_TESTDIN(test_code));
> +
> +	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLK | PHY_UNTESTCLR);
> +
> +	dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_UNTESTEN | PHY_TESTDOUT(0) |
> +					  PHY_TESTDIN(test_data));
> +
> +	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
> +}
> +
> +/**
> + * ns2bc - Nanoseconds to byte clock cycles
> + */
> +static inline unsigned int ns2bc(struct dw_mipi_dsi_rockchip *dsi, int ns)
> +{
> +	return DIV_ROUND_UP(ns * dsi->lane_mbps / 8, 1000);
> +}
> +
> +/**
> + * ns2ui - Nanoseconds to UI time periods
> + */
> +static inline unsigned int ns2ui(struct dw_mipi_dsi_rockchip *dsi, int ns)
> +{
> +	return DIV_ROUND_UP(ns * dsi->lane_mbps, 1000);
> +}
> +
> +static int dw_mipi_dsi_phy_init(void *priv_data)
> +{
> +	struct dw_mipi_dsi_rockchip *dsi = priv_data;
> +	int ret, i, vco;
> +
> +	vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;

Please add a clarifying comment as requested by Sean on
https://chromium-review.googlesource.com/#/c/chromiumos/third_party/kernel/+/780120/

> +	i = max_mbps_to_parameter(dsi->lane_mbps);
> +	if (i < 0) {
> +		DRM_DEV_ERROR(dsi->dev,
> +			      "failed to get parameter for %dmbps clock\n",
> +			      dsi->lane_mbps);
> +		return i;
> +	}
> +
> +	ret = clk_prepare_enable(dsi->phy_cfg_clk);
> +	if (ret) {
> +		DRM_DEV_ERROR(dsi->dev, "Failed to enable phy_cfg_clk\n");
> +		return ret;
> +	}
> +
> +	dw_mipi_dsi_phy_write(dsi, PLL_BIAS_CUR_SEL_CAP_VCO_CONTROL,
> +			      BYPASS_VCO_RANGE |
> +			      VCO_RANGE_CON_SEL(vco) |
> +			      VCO_IN_CAP_CON_LOW |
> +			      REF_BIAS_CUR_SEL);
> +
> +	dw_mipi_dsi_phy_write(dsi, PLL_CP_CONTROL_PLL_LOCK_BYPASS,
> +			      CP_CURRENT_SEL(dppa_map[i].icpctrl));
> +	dw_mipi_dsi_phy_write(dsi, PLL_LPF_AND_CP_CONTROL,
> +			      CP_PROGRAM_EN | LPF_PROGRAM_EN |
> +			      LPF_RESISTORS_SEL(dppa_map[i].lpfctrl));
> +
> +	dw_mipi_dsi_phy_write(dsi, HS_RX_CONTROL_OF_LANE_0,
> +			      HSFREQRANGE_SEL(dppa_map[i].hsfreqrange));
> +
> +	dw_mipi_dsi_phy_write(dsi, PLL_INPUT_DIVIDER_RATIO,
> +			      INPUT_DIVIDER(dsi->input_div));
> +	dw_mipi_dsi_phy_write(dsi, PLL_LOOP_DIVIDER_RATIO,
> +			      LOOP_DIV_LOW_SEL(dsi->feedback_div) |
> +			      LOW_PROGRAM_EN);
> +	/*
> +	 * We need set PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL immediately
> +	 * to make the configured LSB effective according to IP simulation
> +	 * and lab test results.
> +	 * Only in this way can we get correct mipi phy pll frequency.
> +	 */
> +	dw_mipi_dsi_phy_write(dsi, PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL,
> +			      PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
> +	dw_mipi_dsi_phy_write(dsi, PLL_LOOP_DIVIDER_RATIO,
> +			      LOOP_DIV_HIGH_SEL(dsi->feedback_div) |
> +			      HIGH_PROGRAM_EN);
> +	dw_mipi_dsi_phy_write(dsi, PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL,
> +			      PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
> +
> +	dw_mipi_dsi_phy_write(dsi, AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY,
> +			      LOW_PROGRAM_EN | BIASEXTR_SEL(BIASEXTR_127_7));
> +	dw_mipi_dsi_phy_write(dsi, AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY,
> +			      HIGH_PROGRAM_EN | BANDGAP_SEL(BANDGAP_96_10));
> +
> +	dw_mipi_dsi_phy_write(dsi, BANDGAP_AND_BIAS_CONTROL,
> +			      POWER_CONTROL | INTERNAL_REG_CURRENT |
> +			      BIAS_BLOCK_ON | BANDGAP_ON);
> +
> +	dw_mipi_dsi_phy_write(dsi, TERMINATION_RESISTER_CONTROL,
> +			      TER_RESISTOR_LOW | TER_CAL_DONE |
> +			      SETRD_MAX | TER_RESISTORS_ON);
> +	dw_mipi_dsi_phy_write(dsi, TERMINATION_RESISTER_CONTROL,
> +			      TER_RESISTOR_HIGH | LEVEL_SHIFTERS_ON |
> +			      SETRD_MAX | POWER_MANAGE |
> +			      TER_RESISTORS_ON);
> +
> +	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_REQUEST_STATE_TIME_CONTROL,
> +			      TLP_PROGRAM_EN | ns2bc(dsi, 500));
> +	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_PREPARE_STATE_TIME_CONTROL,
> +			      THS_PRE_PROGRAM_EN | ns2ui(dsi, 40));
> +	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_HS_ZERO_STATE_TIME_CONTROL,
> +			      THS_ZERO_PROGRAM_EN | ns2bc(dsi, 300));
> +	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_TRAIL_STATE_TIME_CONTROL,
> +			      THS_PRE_PROGRAM_EN | ns2ui(dsi, 100));
> +	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_EXIT_STATE_TIME_CONTROL,
> +			      BIT(5) | ns2bc(dsi, 100));
> +	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_POST_TIME_CONTROL,
> +			      BIT(5) | (ns2bc(dsi, 60) + 7));
> +
> +	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_REQUEST_STATE_TIME_CONTROL,
> +			      TLP_PROGRAM_EN | ns2bc(dsi, 500));
> +	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_PREPARE_STATE_TIME_CONTROL,
> +			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 50) + 20));
> +	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_HS_ZERO_STATE_TIME_CONTROL,
> +			      THS_ZERO_PROGRAM_EN | (ns2bc(dsi, 140) + 2));
> +	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_TRAIL_STATE_TIME_CONTROL,
> +			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 60) + 8));
> +	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_EXIT_STATE_TIME_CONTROL,
> +			      BIT(5) | ns2bc(dsi, 100));
> +
> +	clk_disable_unprepare(dsi->phy_cfg_clk);
> +
> +	return ret;
> +}
> +
> +static int
> +dw_mipi_dsi_get_lane_mbps(void *priv_data, struct drm_display_mode *mode,
> +			  unsigned long mode_flags, u32 lanes, u32 format,
> +			  unsigned int *lane_mbps)
> +{
> +	struct dw_mipi_dsi_rockchip *dsi = priv_data;
> +	int bpp;
> +	unsigned long mpclk, tmp;
> +	unsigned int target_mbps = 1000;
> +	unsigned int max_mbps = dppa_map[ARRAY_SIZE(dppa_map) - 1].max_mbps;
> +	unsigned long best_freq = 0;
> +	unsigned long fvco_min, fvco_max, fin, fout;
> +	unsigned int min_prediv, max_prediv;
> +	unsigned int _prediv, uninitialized_var(best_prediv);
> +	unsigned long _fbdiv, uninitialized_var(best_fbdiv);
> +	unsigned long min_delta = ULONG_MAX;
> +
> +	dsi->format = format;
> +	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
> +	if (bpp < 0) {
> +		DRM_DEV_ERROR(dsi->dev,
> +			      "failed to get bpp for pixel format %d\n",
> +			      dsi->format);
> +		return bpp;
> +	}
> +
> +	mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC);
> +	if (mpclk) {
> +		/* take 1 / 0.8, since mbps must big than bandwidth of RGB */
> +		tmp = mpclk * (bpp / lanes) * 10 / 8;
> +		if (tmp < max_mbps)
> +			target_mbps = tmp;
> +		else
> +			DRM_DEV_ERROR(dsi->dev,
> +				      "DPHY clock frequency is out of range\n");
> +	}
> +
> +	fin = clk_get_rate(dsi->pllref_clk);
> +	fout = target_mbps * USEC_PER_SEC;
> +
> +	/* constraint: 5Mhz <= Fref / N <= 40MHz */
> +	min_prediv = DIV_ROUND_UP(fin, 40 * USEC_PER_SEC);
> +	max_prediv = fin / (5 * USEC_PER_SEC);
> +
> +	/* constraint: 80MHz <= Fvco <= 1500Mhz */
> +	fvco_min = 80 * USEC_PER_SEC;
> +	fvco_max = 1500 * USEC_PER_SEC;
> +
> +	for (_prediv = min_prediv; _prediv <= max_prediv; _prediv++) {
> +		u64 tmp;
> +		u32 delta;
> +		/* Fvco = Fref * M / N */
> +		tmp = (u64)fout * _prediv;
> +		do_div(tmp, fin);
> +		_fbdiv = tmp;
> +		/*
> +		 * Due to the use of a "by 2 pre-scaler," the range of the
> +		 * feedback multiplication value M is limited to even division
> +		 * numbers, and m must be greater than 6, less than 512.
> +		 */

It seems this should be "not bigger than 512" or something similar.

> +		if (_fbdiv < 6 || _fbdiv > 512)
> +			continue;
> +
> +		_fbdiv += _fbdiv % 2;
> +
> +		tmp = (u64)_fbdiv * fin;
> +		do_div(tmp, _prediv);

Should we bail out early if min_prediv == 0 due to some bogus
configuration of pllref_clk?

> +		if (tmp < fvco_min || tmp > fvco_max)
> +			continue;
> +
> +		delta = abs(fout - tmp);
> +		if (delta < min_delta) {
> +			best_prediv = _prediv;
> +			best_fbdiv = _fbdiv;
> +			min_delta = delta;
> +			best_freq = tmp;
> +		}
> +	}
> +
> +	if (best_freq) {
> +		dsi->lane_mbps = DIV_ROUND_UP(best_freq, USEC_PER_SEC);
> +		*lane_mbps = dsi->lane_mbps;
> +		dsi->input_div = best_prediv;
> +		dsi->feedback_div = best_fbdiv;
> +	} else {
> +		DRM_DEV_ERROR(dsi->dev, "Can not find best_freq for DPHY\n");

return -1;

> +	}
> +
> +	return 0;
> +}
> +
> +static const struct dw_mipi_dsi_phy_ops dw_mipi_dsi_rockchip_phy_ops = {
> +	.init = dw_mipi_dsi_phy_init,
> +	.get_lane_mbps = dw_mipi_dsi_get_lane_mbps,
> +};
> +
> +static void dw_mipi_dsi_encoder_mode_set(struct drm_encoder *encoder,
> +					 struct drm_display_mode *mode,
> +					 struct drm_display_mode *adjusted)
> +{
> +	struct dw_mipi_dsi_rockchip *dsi = to_dsi(encoder);
> +	const struct rockchip_dw_dsi_chip_data *cdata = dsi->cdata;
> +	int val, ret, mux;
> +
> +	mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node,
> +						&dsi->encoder);
> +	if (mux < 0)
> +		return;
> +	/*
> +	 * For the RK3399, the clk of grf must be enabled before writing grf
> +	 * register. And for RK3288 or other soc, this grf_clk must be NULL,
> +	 * the clk_prepare_enable return true directly.
> +	 */
> +	ret = clk_prepare_enable(dsi->grf_clk);
> +	if (ret) {
> +		DRM_DEV_ERROR(dsi->dev, "Failed to enable grf_clk: %d\n", ret);
> +		return;
> +	}
> +
> +	val = cdata->dsi0_en_bit << 16;
> +	if (mux)
> +		val |= cdata->dsi0_en_bit;
> +	regmap_write(dsi->grf_regmap, cdata->grf_switch_reg, val);
> +
> +	if (cdata->grf_dsi0_mode_reg)
> +		regmap_write(dsi->grf_regmap, cdata->grf_dsi0_mode_reg,
> +			     cdata->grf_dsi0_mode);
> +
> +	clk_disable_unprepare(dsi->grf_clk);
> +}
> +
> +static int
> +dw_mipi_dsi_encoder_atomic_check(struct drm_encoder *encoder,
> +				 struct drm_crtc_state *crtc_state,
> +				 struct drm_connector_state *conn_state)
> +{
> +	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
> +	struct dw_mipi_dsi_rockchip *dsi = to_dsi(encoder);
> +
> +	switch (dsi->format) {
> +	case MIPI_DSI_FMT_RGB888:
> +		s->output_mode = ROCKCHIP_OUT_MODE_P888;
> +		break;
> +	case MIPI_DSI_FMT_RGB666:
> +		s->output_mode = ROCKCHIP_OUT_MODE_P666;
> +		break;
> +	case MIPI_DSI_FMT_RGB565:
> +		s->output_mode = ROCKCHIP_OUT_MODE_P565;
> +		break;
> +	default:
> +		WARN_ON(1);
> +		return -EINVAL;
> +	}
> +
> +	s->output_type = DRM_MODE_CONNECTOR_DSI;
> +
> +	return 0;
> +}
> +
> +static const struct drm_encoder_helper_funcs
> +dw_mipi_dsi_encoder_helper_funcs = {
> +	.mode_set = dw_mipi_dsi_encoder_mode_set,
> +	.atomic_check = dw_mipi_dsi_encoder_atomic_check,
> +};
> +
> +static const struct drm_encoder_funcs dw_mipi_dsi_encoder_funcs = {
> +	.destroy = drm_encoder_cleanup,
> +};
> +
> +static int rockchip_dsi_drm_create_encoder(struct dw_mipi_dsi_rockchip *dsi,
> +					   struct drm_device *drm_dev)
> +{
> +	struct drm_encoder *encoder = &dsi->encoder;
> +	int ret;
> +
> +	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
> +							     dsi->dev->of_node);
> +
> +	ret = drm_encoder_init(drm_dev, encoder, &dw_mipi_dsi_encoder_funcs,
> +			       DRM_MODE_ENCODER_DSI, NULL);
> +	if (ret) {
> +		DRM_ERROR("Failed to initialize encoder with drm\n");
> +		return ret;
> +	}
> +
> +	drm_encoder_helper_add(encoder, &dw_mipi_dsi_encoder_helper_funcs);
> +
> +	return 0;
> +}
> +
> +static int dw_mipi_dsi_rockchip_bind(struct device *dev,
> +				     struct device *master,
> +				     void *data)
> +{
> +	struct dw_mipi_dsi_rockchip *dsi = dev_get_drvdata(dev);
> +	struct platform_device *pdev = to_platform_device(dev);
> +	struct drm_device *drm_dev = data;
> +	int ret;
> +
> +	dsi->pdata.base = dsi->base;
> +	dsi->pdata.max_data_lanes = dsi->cdata->max_data_lanes;
> +	dsi->pdata.phy_ops = &dw_mipi_dsi_rockchip_phy_ops;
> +	dsi->pdata.priv_data = dsi;
> +
> +	ret = clk_prepare_enable(dsi->pllref_clk);
> +	if (ret) {
> +		DRM_DEV_ERROR(dev,
> +			      "%s: Failed to enable pllref_clk\n", __func__);
> +		return ret;
> +	}
> +
> +	ret = rockchip_dsi_drm_create_encoder(dsi, drm_dev);
> +	if (ret) {
> +		DRM_ERROR("Failed to create drm encoder\n");
> +		goto err_pllref;
> +	}
> +
> +	dsi->dmd = dw_mipi_dsi_bind(pdev, &dsi->encoder, &dsi->pdata);
> +	if (IS_ERR(dsi->dmd)) {
> +		DRM_ERROR("Failed to bind\n");
> +		ret = PTR_ERR(dsi->dmd);
> +		goto err_pllref;
> +	}
> +	return 0;
> +
> +err_pllref:
> +	clk_disable_unprepare(dsi->pllref_clk);
> +	return ret;
> +}
> +
> +static void dw_mipi_dsi_rockchip_unbind(struct device *dev,
> +					struct device *master,
> +					void *data)
> +{
> +	struct dw_mipi_dsi_rockchip *dsi = dev_get_drvdata(dev);
> +
> +	dw_mipi_dsi_unbind(dsi->dmd);
> +	clk_disable_unprepare(dsi->pllref_clk);
> +}
> +
> +static const struct component_ops dw_mipi_dsi_rockchip_ops = {
> +	.bind	= dw_mipi_dsi_rockchip_bind,
> +	.unbind	= dw_mipi_dsi_rockchip_unbind,
> +};
> +
> +static int dw_mipi_dsi_rockchip_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct device_node *np = dev->of_node;
> +	struct dw_mipi_dsi_rockchip *dsi;
> +	struct resource *res;
> +	const struct rockchip_dw_dsi_chip_data *cdata =
> +				of_device_get_match_data(dev);
> +	int ret;
> +
> +	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
> +	if (!dsi)
> +		return -ENOMEM;
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	if (!res) {
> +		DRM_ERROR("Unable to get resource\n");
> +		return -ENODEV;
> +	}
> +
> +	dsi->base = devm_ioremap_resource(dev, res);
> +	if (IS_ERR(dsi->base)) {
> +		DRM_ERROR("Unable to get dsi registers\n");
> +		return PTR_ERR(dsi->base);
> +	}
> +
> +	dsi->pllref_clk = devm_clk_get(dev, "ref");
> +	if (IS_ERR(dsi->pllref_clk)) {
> +		ret = PTR_ERR(dsi->pllref_clk);
> +		DRM_DEV_ERROR(dev,
> +			      "Unable to get pll reference clock: %d\n", ret);
> +		return ret;
> +	}
> +
> +	if (cdata->flags & DW_MIPI_NEEDS_PHY_CFG_CLK) {
> +		dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
> +		if (IS_ERR(dsi->phy_cfg_clk)) {
> +			ret = PTR_ERR(dsi->phy_cfg_clk);
> +			DRM_DEV_ERROR(dev,
> +				      "Unable to get phy_cfg_clk: %d\n", ret);
> +			return ret;
> +		}
> +	}
> +
> +	if (cdata->flags & DW_MIPI_NEEDS_GRF_CLK) {
> +		dsi->grf_clk = devm_clk_get(dev, "grf");
> +		if (IS_ERR(dsi->grf_clk)) {
> +			ret = PTR_ERR(dsi->grf_clk);
> +			DRM_DEV_ERROR(dev, "Unable to get grf_clk: %d\n", ret);
> +			return ret;
> +		}
> +	}
> +
> +	dsi->grf_regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
> +	if (IS_ERR(dsi->grf_regmap)) {
> +		DRM_DEV_ERROR(dsi->dev, "Unable to get rockchip,grf\n");
> +		return PTR_ERR(dsi->grf_regmap);
> +	}
> +
> +	dsi->cdata = cdata;
> +	dsi->dev = dev;
> +	dev_set_drvdata(dev, dsi);
> +
> +	return component_add(&pdev->dev, &dw_mipi_dsi_rockchip_ops);
> +}
> +
> +static int dw_mipi_dsi_rockchip_remove(struct platform_device *pdev)
> +{
> +	component_del(&pdev->dev, &dw_mipi_dsi_rockchip_ops);
> +
> +	return 0;
> +}
> +
> +static struct rockchip_dw_dsi_chip_data rk3288_chip_data = {
> +	.dsi0_en_bit = RK3288_DSI0_SEL_VOP_LIT,
> +	.dsi1_en_bit = RK3288_DSI1_SEL_VOP_LIT,
> +	.grf_switch_reg = RK3288_GRF_SOC_CON6,
> +	.max_data_lanes = 4,
> +};
> +
> +static struct rockchip_dw_dsi_chip_data rk3399_chip_data = {
> +	.dsi0_en_bit = RK3399_DSI0_SEL_VOP_LIT,
> +	.dsi1_en_bit = RK3399_DSI1_SEL_VOP_LIT,
> +	.grf_switch_reg = RK3399_GRF_SOC_CON20,
> +	.grf_dsi0_mode = RK3399_GRF_DSI_MODE,
> +	.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
> +	.flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK,
> +	.max_data_lanes = 4,
> +};
> +
> +static const struct of_device_id dw_mipi_dsi_rockchip_dt_ids[] = {
> +	{
> +	 .compatible = "rockchip,rk3288-mipi-dsi",
> +	 .data = &rk3288_chip_data,
> +	}, {
> +	 .compatible = "rockchip,rk3399-mipi-dsi",
> +	 .data = &rk3399_chip_data,
> +	},
> +	{ /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, dw_mipi_dsi_rockchip_dt_ids);
> +
> +struct platform_driver dw_mipi_dsi_rockchip_driver = {
> +	.probe		= dw_mipi_dsi_rockchip_probe,
> +	.remove		= dw_mipi_dsi_rockchip_remove,
> +	.driver		= {
> +		.of_match_table = dw_mipi_dsi_rockchip_dt_ids,
> +		.name	= "dw-mipi-dsi-rockchip",
> +	},
> +};
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> index 76d63de..d40cc39 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> @@ -462,7 +462,7 @@ static int __init rockchip_drm_init(void)
>  	ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
>  	ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver,
>  				CONFIG_ROCKCHIP_DW_HDMI);
> -	ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_driver,
> +	ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_rockchip_driver,
>  				CONFIG_ROCKCHIP_DW_MIPI_DSI);
>  	ADD_ROCKCHIP_SUB_DRIVER(inno_hdmi_driver, CONFIG_ROCKCHIP_INNO_HDMI);
>  
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
> index 498dfbc..af235b2 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
> @@ -66,7 +66,7 @@ void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
>  
>  extern struct platform_driver cdn_dp_driver;
>  extern struct platform_driver dw_hdmi_rockchip_pltfm_driver;
> -extern struct platform_driver dw_mipi_dsi_driver;
> +extern struct platform_driver dw_mipi_dsi_rockchip_driver;
>  extern struct platform_driver inno_hdmi_driver;
>  extern struct platform_driver rockchip_dp_driver;
>  extern struct platform_driver rockchip_lvds_driver;
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Re: [PATCH v3 4/5] drm/rockchip: Add ROCKCHIP DW MIPI DSI controller driver

[Brian Norris]

Hi Nickey,

On Tue, Nov 28, 2017 at 12:48:43PM -0800, Matthias Kaehlcke wrote:
> El Tue, Nov 28, 2017 at 07:20:05PM +0800 Nickey Yang ha dit:
> 
> > Add the ROCKCHIP DSI controller driver that uses the Synopsys DesignWare
> > MIPI DSI host controller bridge.
> > 
> > v2:
> >    add err_pllref, remove unnecessary encoder.enable & disable
> >    correct spelling mistakes
> > v3:
> >    call dw_mipi_dsi_unbind() in dw_mipi_dsi_rockchip_unbind()
> >    fix typo, use of_device_get_match_data(),
> >    change some ‘bind()’ logic into 'probe()'
> >    add 'dev_set_drvdata()'

I believe the changelog normally goes below the "---", so it gets
dropped when a maintainer applies a final version.

> > 
> > Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
> > ---
> >  drivers/gpu/drm/rockchip/Kconfig                |    2 +-
> >  drivers/gpu/drm/rockchip/Makefile               |    2 +-
> >  drivers/gpu/drm/rockchip/dw-mipi-dsi.c          | 1349 -----------------------
> >  drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c |  764 +++++++++++++
> >  drivers/gpu/drm/rockchip/rockchip_drm_drv.c     |    2 +-
> >  drivers/gpu/drm/rockchip/rockchip_drm_drv.h     |    2 +-
> >  6 files changed, 768 insertions(+), 1353 deletions(-)
> >  delete mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> >  create mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
> > 

...

> > diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> > deleted file mode 100644
> > index b15755b..0000000
> > --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> > +++ /dev/null
> > @@ -1,1349 +0,0 @@

...

> > -static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
> > -				   struct mipi_dsi_device *device)
> > -{
> > -	struct dw_mipi_dsi *dsi = host_to_dsi(host);
> > -
> > -	if (device->lanes > dsi->pdata->max_data_lanes) {
> > -		DRM_DEV_ERROR(dsi->dev,
> > -			      "the number of data lanes(%u) is too many\n",
> > -			      device->lanes);
> > -		return -EINVAL;
> > -	}
> > -
> > -	dsi->lanes = device->lanes;
> > -	dsi->channel = device->channel;
> > -	dsi->format = device->format;
> > -	dsi->mode_flags = device->mode_flags;
> > -	dsi->panel = of_drm_find_panel(device->dev.of_node);

IIUC, you're implicitly making a device tree binding change, because the
original driver uses just of_drm_find_panel(), as above, but the common
bridge driver is using drm_of_find_panel_or_bridge(), which puts a
little more stringent requirements on the device tree.

I don't think that's necessarily a bad thing, and there isn't much in
the way of "real" device trees that actually used the existing driver
and binding (probably mostly test devices and prototypes), so maybe it's
better to just make the switch and not worry about compatibility. But I
just wanted to point that out, in case anyone else was interested or
concerned.

> > -	if (dsi->panel)
> > -		return drm_panel_attach(dsi->panel, &dsi->connector);
> > -
> > -	return -EINVAL;
> > -}
> > -

...

> > diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
> > new file mode 100644
> > index 0000000..c682ed2
> > --- /dev/null
> > +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
> > @@ -0,0 +1,764 @@

...

> > +static int dw_mipi_dsi_phy_init(void *priv_data)
> > +{
> > +	struct dw_mipi_dsi_rockchip *dsi = priv_data;
> > +	int ret, i, vco;
> > +
> > +	vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;
> 
> Please add a clarifying comment as requested by Sean on
> https://chromium-review.googlesource.com/#/c/chromiumos/third_party/kernel/+/780120/

FWIW, that code was already in the existing driver. Would be nice to
improve anyway, of course.

...

> > +static int
> > +dw_mipi_dsi_get_lane_mbps(void *priv_data, struct drm_display_mode *mode,
> > +			  unsigned long mode_flags, u32 lanes, u32 format,
> > +			  unsigned int *lane_mbps)
> > +{
> > +	struct dw_mipi_dsi_rockchip *dsi = priv_data;
> > +	int bpp;
> > +	unsigned long mpclk, tmp;
> > +	unsigned int target_mbps = 1000;
> > +	unsigned int max_mbps = dppa_map[ARRAY_SIZE(dppa_map) - 1].max_mbps;
> > +	unsigned long best_freq = 0;
> > +	unsigned long fvco_min, fvco_max, fin, fout;
> > +	unsigned int min_prediv, max_prediv;
> > +	unsigned int _prediv, uninitialized_var(best_prediv);
> > +	unsigned long _fbdiv, uninitialized_var(best_fbdiv);
> > +	unsigned long min_delta = ULONG_MAX;
> > +
> > +	dsi->format = format;
> > +	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
> > +	if (bpp < 0) {
> > +		DRM_DEV_ERROR(dsi->dev,
> > +			      "failed to get bpp for pixel format %d\n",
> > +			      dsi->format);
> > +		return bpp;
> > +	}
> > +
> > +	mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC);
> > +	if (mpclk) {
> > +		/* take 1 / 0.8, since mbps must big than bandwidth of RGB */
> > +		tmp = mpclk * (bpp / lanes) * 10 / 8;
> > +		if (tmp < max_mbps)
> > +			target_mbps = tmp;
> > +		else
> > +			DRM_DEV_ERROR(dsi->dev,
> > +				      "DPHY clock frequency is out of range\n");
> > +	}
> > +
> > +	fin = clk_get_rate(dsi->pllref_clk);
> > +	fout = target_mbps * USEC_PER_SEC;
> > +
> > +	/* constraint: 5Mhz <= Fref / N <= 40MHz */
> > +	min_prediv = DIV_ROUND_UP(fin, 40 * USEC_PER_SEC);
> > +	max_prediv = fin / (5 * USEC_PER_SEC);
> > +
> > +	/* constraint: 80MHz <= Fvco <= 1500Mhz */
> > +	fvco_min = 80 * USEC_PER_SEC;
> > +	fvco_max = 1500 * USEC_PER_SEC;
> > +
> > +	for (_prediv = min_prediv; _prediv <= max_prediv; _prediv++) {
> > +		u64 tmp;
> > +		u32 delta;
> > +		/* Fvco = Fref * M / N */
> > +		tmp = (u64)fout * _prediv;
> > +		do_div(tmp, fin);
> > +		_fbdiv = tmp;
> > +		/*
> > +		 * Due to the use of a "by 2 pre-scaler," the range of the
> > +		 * feedback multiplication value M is limited to even division
> > +		 * numbers, and m must be greater than 6, less than 512.
> > +		 */
> 
> It seems this should be "not bigger than 512" or something similar.
> 
> > +		if (_fbdiv < 6 || _fbdiv > 512)
> > +			continue;
> > +
> > +		_fbdiv += _fbdiv % 2;
> > +
> > +		tmp = (u64)_fbdiv * fin;
> > +		do_div(tmp, _prediv);
> 
> Should we bail out early if min_prediv == 0 due to some bogus
> configuration of pllref_clk?
> 
> > +		if (tmp < fvco_min || tmp > fvco_max)
> > +			continue;
> > +
> > +		delta = abs(fout - tmp);
> > +		if (delta < min_delta) {
> > +			best_prediv = _prediv;
> > +			best_fbdiv = _fbdiv;
> > +			min_delta = delta;
> > +			best_freq = tmp;
> > +		}
> > +	}
> > +
> > +	if (best_freq) {
> > +		dsi->lane_mbps = DIV_ROUND_UP(best_freq, USEC_PER_SEC);
> > +		*lane_mbps = dsi->lane_mbps;
> > +		dsi->input_div = best_prediv;
> > +		dsi->feedback_div = best_fbdiv;
> > +	} else {
> > +		DRM_DEV_ERROR(dsi->dev, "Can not find best_freq for DPHY\n");
> 
> return -1;

Or a real error code would be nicer. -EINVAL?

> > +	}
> > +
> > +	return 0;
> > +}
> > +

...

Other than these relatively small things, this is looking pretty good to
my (not-well-versed-in-drm) eye:

Reviewed-by: Brian Norris <briannorris@chromium.org>
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Re: [PATCH v3 4/5] drm/rockchip: Add ROCKCHIP DW MIPI DSI controller driver

[Sean Paul]

On Tue, Nov 28, 2017 at 02:55:41PM -0800, Brian Norris wrote:
> Hi Nickey,
> 
> On Tue, Nov 28, 2017 at 12:48:43PM -0800, Matthias Kaehlcke wrote:
> > El Tue, Nov 28, 2017 at 07:20:05PM +0800 Nickey Yang ha dit:
> > 
> > > Add the ROCKCHIP DSI controller driver that uses the Synopsys DesignWare
> > > MIPI DSI host controller bridge.
> > > 
> > > v2:
> > >    add err_pllref, remove unnecessary encoder.enable & disable
> > >    correct spelling mistakes
> > > v3:
> > >    call dw_mipi_dsi_unbind() in dw_mipi_dsi_rockchip_unbind()
> > >    fix typo, use of_device_get_match_data(),
> > >    change some ‘bind()’ logic into 'probe()'
> > >    add 'dev_set_drvdata()'
> 
> I believe the changelog normally goes below the "---", so it gets
> dropped when a maintainer applies a final version.
> 

We're kind of different in drm land. Some prefer to keep the changelog above the
fold and attribute the changes to reviewers so they get recognition for their
efforts.

At any rate, I'm just happy to see changelogs.

> > > 
> > > Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
> > > ---
> > >  drivers/gpu/drm/rockchip/Kconfig                |    2 +-
> > >  drivers/gpu/drm/rockchip/Makefile               |    2 +-
> > >  drivers/gpu/drm/rockchip/dw-mipi-dsi.c          | 1349 -----------------------
> > >  drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c |  764 +++++++++++++
> > >  drivers/gpu/drm/rockchip/rockchip_drm_drv.c     |    2 +-
> > >  drivers/gpu/drm/rockchip/rockchip_drm_drv.h     |    2 +-
> > >  6 files changed, 768 insertions(+), 1353 deletions(-)
> > >  delete mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> > >  create mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
> > > 
> 
> ...
> 
> > > diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> > > deleted file mode 100644
> > > index b15755b..0000000
> > > --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> > > +++ /dev/null
> > > @@ -1,1349 +0,0 @@
> 
> ...
> 
> > > -static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
> > > -				   struct mipi_dsi_device *device)
> > > -{
> > > -	struct dw_mipi_dsi *dsi = host_to_dsi(host);
> > > -
> > > -	if (device->lanes > dsi->pdata->max_data_lanes) {
> > > -		DRM_DEV_ERROR(dsi->dev,
> > > -			      "the number of data lanes(%u) is too many\n",
> > > -			      device->lanes);
> > > -		return -EINVAL;
> > > -	}
> > > -
> > > -	dsi->lanes = device->lanes;
> > > -	dsi->channel = device->channel;
> > > -	dsi->format = device->format;
> > > -	dsi->mode_flags = device->mode_flags;
> > > -	dsi->panel = of_drm_find_panel(device->dev.of_node);
> 
> IIUC, you're implicitly making a device tree binding change, because the
> original driver uses just of_drm_find_panel(), as above, but the common
> bridge driver is using drm_of_find_panel_or_bridge(), which puts a
> little more stringent requirements on the device tree.
> 
> I don't think that's necessarily a bad thing, and there isn't much in
> the way of "real" device trees that actually used the existing driver
> and binding (probably mostly test devices and prototypes), so maybe it's
> better to just make the switch and not worry about compatibility. But I
> just wanted to point that out, in case anyone else was interested or
> concerned.
> 
> > > -	if (dsi->panel)
> > > -		return drm_panel_attach(dsi->panel, &dsi->connector);
> > > -
> > > -	return -EINVAL;
> > > -}
> > > -
> 
> ...
> 
> > > diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
> > > new file mode 100644
> > > index 0000000..c682ed2
> > > --- /dev/null
> > > +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
> > > @@ -0,0 +1,764 @@
> 
> ...
> 
> > > +static int dw_mipi_dsi_phy_init(void *priv_data)
> > > +{
> > > +	struct dw_mipi_dsi_rockchip *dsi = priv_data;
> > > +	int ret, i, vco;
> > > +
> > > +	vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;
> > 
> > Please add a clarifying comment as requested by Sean on
> > https://chromium-review.googlesource.com/#/c/chromiumos/third_party/kernel/+/780120/
> 
> FWIW, that code was already in the existing driver. Would be nice to
> improve anyway, of course.
> 

Yeah, not a showstopper, but it'd be nice to know what's going on here.

> ...
> 
> > > +static int
> > > +dw_mipi_dsi_get_lane_mbps(void *priv_data, struct drm_display_mode *mode,
> > > +			  unsigned long mode_flags, u32 lanes, u32 format,
> > > +			  unsigned int *lane_mbps)
> > > +{
> > > +	struct dw_mipi_dsi_rockchip *dsi = priv_data;
> > > +	int bpp;
> > > +	unsigned long mpclk, tmp;
> > > +	unsigned int target_mbps = 1000;
> > > +	unsigned int max_mbps = dppa_map[ARRAY_SIZE(dppa_map) - 1].max_mbps;
> > > +	unsigned long best_freq = 0;
> > > +	unsigned long fvco_min, fvco_max, fin, fout;
> > > +	unsigned int min_prediv, max_prediv;
> > > +	unsigned int _prediv, uninitialized_var(best_prediv);
> > > +	unsigned long _fbdiv, uninitialized_var(best_fbdiv);
> > > +	unsigned long min_delta = ULONG_MAX;
> > > +
> > > +	dsi->format = format;
> > > +	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
> > > +	if (bpp < 0) {
> > > +		DRM_DEV_ERROR(dsi->dev,
> > > +			      "failed to get bpp for pixel format %d\n",
> > > +			      dsi->format);
> > > +		return bpp;
> > > +	}
> > > +
> > > +	mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC);
> > > +	if (mpclk) {
> > > +		/* take 1 / 0.8, since mbps must big than bandwidth of RGB */
> > > +		tmp = mpclk * (bpp / lanes) * 10 / 8;
> > > +		if (tmp < max_mbps)
> > > +			target_mbps = tmp;
> > > +		else
> > > +			DRM_DEV_ERROR(dsi->dev,
> > > +				      "DPHY clock frequency is out of range\n");
> > > +	}
> > > +
> > > +	fin = clk_get_rate(dsi->pllref_clk);
> > > +	fout = target_mbps * USEC_PER_SEC;
> > > +
> > > +	/* constraint: 5Mhz <= Fref / N <= 40MHz */
> > > +	min_prediv = DIV_ROUND_UP(fin, 40 * USEC_PER_SEC);
> > > +	max_prediv = fin / (5 * USEC_PER_SEC);
> > > +
> > > +	/* constraint: 80MHz <= Fvco <= 1500Mhz */
> > > +	fvco_min = 80 * USEC_PER_SEC;
> > > +	fvco_max = 1500 * USEC_PER_SEC;
> > > +
> > > +	for (_prediv = min_prediv; _prediv <= max_prediv; _prediv++) {
> > > +		u64 tmp;
> > > +		u32 delta;
> > > +		/* Fvco = Fref * M / N */
> > > +		tmp = (u64)fout * _prediv;
> > > +		do_div(tmp, fin);
> > > +		_fbdiv = tmp;
> > > +		/*
> > > +		 * Due to the use of a "by 2 pre-scaler," the range of the
> > > +		 * feedback multiplication value M is limited to even division
> > > +		 * numbers, and m must be greater than 6, less than 512.
> > > +		 */
> > 
> > It seems this should be "not bigger than 512" or something similar.
> > 
> > > +		if (_fbdiv < 6 || _fbdiv > 512)
> > > +			continue;
> > > +
> > > +		_fbdiv += _fbdiv % 2;
> > > +
> > > +		tmp = (u64)_fbdiv * fin;
> > > +		do_div(tmp, _prediv);
> > 
> > Should we bail out early if min_prediv == 0 due to some bogus
> > configuration of pllref_clk?
> > 
> > > +		if (tmp < fvco_min || tmp > fvco_max)
> > > +			continue;
> > > +
> > > +		delta = abs(fout - tmp);
> > > +		if (delta < min_delta) {
> > > +			best_prediv = _prediv;
> > > +			best_fbdiv = _fbdiv;
> > > +			min_delta = delta;
> > > +			best_freq = tmp;
> > > +		}
> > > +	}
> > > +
> > > +	if (best_freq) {
> > > +		dsi->lane_mbps = DIV_ROUND_UP(best_freq, USEC_PER_SEC);
> > > +		*lane_mbps = dsi->lane_mbps;
> > > +		dsi->input_div = best_prediv;
> > > +		dsi->feedback_div = best_fbdiv;
> > > +	} else {
> > > +		DRM_DEV_ERROR(dsi->dev, "Can not find best_freq for DPHY\n");
> > 
> > return -1;
> 
> Or a real error code would be nicer. -EINVAL?

+1
> 
> > > +	}
> > > +
> > > +	return 0;
> > > +}
> > > +
> 
> ...
> 
> Other than these relatively small things, this is looking pretty good to
> my (not-well-versed-in-drm) eye:
> 
> Reviewed-by: Brian Norris <briannorris@chromium.org>

I certainly think this moves the needle in a positive direction. So with the
nits addressed:

Reviewed-by: Sean Paul <seanpaul@chromium.org>

-- 
Sean Paul, Software Engineer, Google / Chromium OS
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Re: [PATCH v3 4/5] drm/rockchip: Add ROCKCHIP DW MIPI DSI controller driver

[Brian Norris]

On Tue, Nov 28, 2017 at 6:02 PM, Sean Paul <seanpaul@chromium.org> wrote:
> On Tue, Nov 28, 2017 at 02:55:41PM -0800, Brian Norris wrote:
>> On Tue, Nov 28, 2017 at 12:48:43PM -0800, Matthias Kaehlcke wrote:
>> > El Tue, Nov 28, 2017 at 07:20:05PM +0800 Nickey Yang ha dit:
>> >
>> > > Add the ROCKCHIP DSI controller driver that uses the Synopsys DesignWare
>> > > MIPI DSI host controller bridge.
>> > >
>> > > v2:
>> > >    add err_pllref, remove unnecessary encoder.enable & disable
>> > >    correct spelling mistakes
>> > > v3:
>> > >    call dw_mipi_dsi_unbind() in dw_mipi_dsi_rockchip_unbind()
>> > >    fix typo, use of_device_get_match_data(),
>> > >    change some ‘bind()’ logic into 'probe()'
>> > >    add 'dev_set_drvdata()'
>>
>> I believe the changelog normally goes below the "---", so it gets
>> dropped when a maintainer applies a final version.
>>
>
> We're kind of different in drm land. Some prefer to keep the changelog above the
> fold and attribute the changes to reviewers so they get recognition for their
> efforts.

Ah, now I remember reading that somewhere. Seems nice, I suppose. (And
hey, git logs are cheap.) I guess my "I don't review DRM patches much"
status is showing :)

> At any rate, I'm just happy to see changelogs.

Yep :)

Brian

Re: [PATCH v3 4/5] drm/rockchip: Add ROCKCHIP DW MIPI DSI controller driver

[Nickey Yang]

Hi Matthias,


On 2017年11月29日 04:48, Matthias Kaehlcke wrote:
> El Tue, Nov 28, 2017 at 07:20:05PM +0800 Nickey Yang ha dit:
>
>> Add the ROCKCHIP DSI controller driver that uses the Synopsys DesignWare
>> MIPI DSI host controller bridge.
>>
>> v2:
>>     add err_pllref, remove unnecessary encoder.enable & disable
>>     correct spelling mistakes
>> v3:
>>     call dw_mipi_dsi_unbind() in dw_mipi_dsi_rockchip_unbind()
>>     fix typo, use of_device_get_match_data(),
>>     change some ‘bind()’ logic into 'probe()'
>>     add 'dev_set_drvdata()'
>>
>> Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
>> ---
>>   drivers/gpu/drm/rockchip/Kconfig                |    2 +-
>>   drivers/gpu/drm/rockchip/Makefile               |    2 +-
>>   drivers/gpu/drm/rockchip/dw-mipi-dsi.c          | 1349 -----------------------
>>   drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c |  764 +++++++++++++
>>   drivers/gpu/drm/rockchip/rockchip_drm_drv.c     |    2 +-
>>   drivers/gpu/drm/rockchip/rockchip_drm_drv.h     |    2 +-
>>   6 files changed, 768 insertions(+), 1353 deletions(-)
>>   delete mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi.c
>>   create mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
>>
>> diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
>> index 0ccc762..9eb4795 100644
>> --- a/drivers/gpu/drm/rockchip/Kconfig
>> +++ b/drivers/gpu/drm/rockchip/Kconfig
>> @@ -7,7 +7,7 @@ config DRM_ROCKCHIP
>>   	select VIDEOMODE_HELPERS
>>   	select DRM_ANALOGIX_DP if ROCKCHIP_ANALOGIX_DP
>>   	select DRM_DW_HDMI if ROCKCHIP_DW_HDMI
>> -	select DRM_MIPI_DSI if ROCKCHIP_DW_MIPI_DSI
>> +	select DRM_DW_MIPI_DSI if ROCKCHIP_DW_MIPI_DSI
>>   	select SND_SOC_HDMI_CODEC if ROCKCHIP_CDN_DP && SND_SOC
>>   	help
>>   	  Choose this option if you have a Rockchip soc chipset.
>> diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile
>> index a314e21..c05fe47 100644
>> --- a/drivers/gpu/drm/rockchip/Makefile
>> +++ b/drivers/gpu/drm/rockchip/Makefile
>> @@ -11,7 +11,7 @@ rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o
>>   rockchipdrm-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o
>>   rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o
>>   rockchipdrm-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o
>> -rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi.o
>> +rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi_rockchip.o
>>   rockchipdrm-$(CONFIG_ROCKCHIP_INNO_HDMI) += inno_hdmi.o
>>   rockchipdrm-$(CONFIG_ROCKCHIP_LVDS) += rockchip_lvds.o
>>   
>> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
>> deleted file mode 100644
>> index b15755b..0000000
>> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
>> +++ /dev/null
>> @@ -1,1349 +0,0 @@
>> -/*
>> - * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd
>> - *
>> - * This program is free software; you can redistribute it and/or modify
>> - * it under the terms of the GNU General Public License as published by
>> - * the Free Software Foundation; either version 2 of the License, or
>> - * (at your option) any later version.
>> - */
>> -#include <linux/clk.h>
>> -#include <linux/component.h>
>> -#include <linux/iopoll.h>
>> -#include <linux/math64.h>
>> -#include <linux/module.h>
>> -#include <linux/of_device.h>
>> -#include <linux/pm_runtime.h>
>> -#include <linux/regmap.h>
>> -#include <linux/reset.h>
>> -#include <linux/mfd/syscon.h>
>> -#include <drm/drm_atomic_helper.h>
>> -#include <drm/drm_crtc.h>
>> -#include <drm/drm_crtc_helper.h>
>> -#include <drm/drm_mipi_dsi.h>
>> -#include <drm/drm_of.h>
>> -#include <drm/drm_panel.h>
>> -#include <drm/drmP.h>
>> -#include <video/mipi_display.h>
>> -
>> -#include "rockchip_drm_drv.h"
>> -#include "rockchip_drm_vop.h"
>> -
>> -#define DRIVER_NAME    "dw-mipi-dsi"
>> -
>> -#define RK3288_GRF_SOC_CON6		0x025c
>> -#define RK3288_DSI0_SEL_VOP_LIT		BIT(6)
>> -#define RK3288_DSI1_SEL_VOP_LIT		BIT(9)
>> -
>> -#define RK3399_GRF_SOC_CON20		0x6250
>> -#define RK3399_DSI0_SEL_VOP_LIT		BIT(0)
>> -#define RK3399_DSI1_SEL_VOP_LIT		BIT(4)
>> -
>> -/* disable turnrequest, turndisable, forcetxstopmode, forcerxmode */
>> -#define RK3399_GRF_SOC_CON22		0x6258
>> -#define RK3399_GRF_DSI_MODE		0xffff0000
>> -
>> -#define DSI_VERSION			0x00
>> -#define DSI_PWR_UP			0x04
>> -#define RESET				0
>> -#define POWERUP				BIT(0)
>> -
>> -#define DSI_CLKMGR_CFG			0x08
>> -#define TO_CLK_DIVIDSION(div)		(((div) & 0xff) << 8)
>> -#define TX_ESC_CLK_DIVIDSION(div)	(((div) & 0xff) << 0)
>> -
>> -#define DSI_DPI_VCID			0x0c
>> -#define DPI_VID(vid)			(((vid) & 0x3) << 0)
>> -
>> -#define DSI_DPI_COLOR_CODING		0x10
>> -#define EN18_LOOSELY			BIT(8)
>> -#define DPI_COLOR_CODING_16BIT_1	0x0
>> -#define DPI_COLOR_CODING_16BIT_2	0x1
>> -#define DPI_COLOR_CODING_16BIT_3	0x2
>> -#define DPI_COLOR_CODING_18BIT_1	0x3
>> -#define DPI_COLOR_CODING_18BIT_2	0x4
>> -#define DPI_COLOR_CODING_24BIT		0x5
>> -
>> -#define DSI_DPI_CFG_POL			0x14
>> -#define COLORM_ACTIVE_LOW		BIT(4)
>> -#define SHUTD_ACTIVE_LOW		BIT(3)
>> -#define HSYNC_ACTIVE_LOW		BIT(2)
>> -#define VSYNC_ACTIVE_LOW		BIT(1)
>> -#define DATAEN_ACTIVE_LOW		BIT(0)
>> -
>> -#define DSI_DPI_LP_CMD_TIM		0x18
>> -#define OUTVACT_LPCMD_TIME(p)		(((p) & 0xff) << 16)
>> -#define INVACT_LPCMD_TIME(p)		((p) & 0xff)
>> -
>> -#define DSI_DBI_CFG			0x20
>> -#define DSI_DBI_CMDSIZE			0x28
>> -
>> -#define DSI_PCKHDL_CFG			0x2c
>> -#define EN_CRC_RX			BIT(4)
>> -#define EN_ECC_RX			BIT(3)
>> -#define EN_BTA				BIT(2)
>> -#define EN_EOTP_RX			BIT(1)
>> -#define EN_EOTP_TX			BIT(0)
>> -
>> -#define DSI_MODE_CFG			0x34
>> -#define ENABLE_VIDEO_MODE		0
>> -#define ENABLE_CMD_MODE			BIT(0)
>> -
>> -#define DSI_VID_MODE_CFG		0x38
>> -#define FRAME_BTA_ACK			BIT(14)
>> -#define ENABLE_LOW_POWER		(0x3f << 8)
>> -#define ENABLE_LOW_POWER_MASK		(0x3f << 8)
>> -#define VID_MODE_TYPE_NON_BURST_SYNC_PULSES	0x0
>> -#define VID_MODE_TYPE_NON_BURST_SYNC_EVENTS	0x1
>> -#define VID_MODE_TYPE_BURST			0x2
>> -#define VID_MODE_TYPE_MASK			0x3
>> -
>> -#define DSI_VID_PKT_SIZE		0x3c
>> -#define VID_PKT_SIZE(p)			(((p) & 0x3fff) << 0)
>> -#define VID_PKT_MAX_SIZE		0x3fff
>> -
>> -#define DSI_VID_HSA_TIME		0x48
>> -#define DSI_VID_HBP_TIME		0x4c
>> -#define DSI_VID_HLINE_TIME		0x50
>> -#define DSI_VID_VSA_LINES		0x54
>> -#define DSI_VID_VBP_LINES		0x58
>> -#define DSI_VID_VFP_LINES		0x5c
>> -#define DSI_VID_VACTIVE_LINES		0x60
>> -#define DSI_CMD_MODE_CFG		0x68
>> -#define MAX_RD_PKT_SIZE_LP		BIT(24)
>> -#define DCS_LW_TX_LP			BIT(19)
>> -#define DCS_SR_0P_TX_LP			BIT(18)
>> -#define DCS_SW_1P_TX_LP			BIT(17)
>> -#define DCS_SW_0P_TX_LP			BIT(16)
>> -#define GEN_LW_TX_LP			BIT(14)
>> -#define GEN_SR_2P_TX_LP			BIT(13)
>> -#define GEN_SR_1P_TX_LP			BIT(12)
>> -#define GEN_SR_0P_TX_LP			BIT(11)
>> -#define GEN_SW_2P_TX_LP			BIT(10)
>> -#define GEN_SW_1P_TX_LP			BIT(9)
>> -#define GEN_SW_0P_TX_LP			BIT(8)
>> -#define EN_ACK_RQST			BIT(1)
>> -#define EN_TEAR_FX			BIT(0)
>> -
>> -#define CMD_MODE_ALL_LP			(MAX_RD_PKT_SIZE_LP | \
>> -					 DCS_LW_TX_LP | \
>> -					 DCS_SR_0P_TX_LP | \
>> -					 DCS_SW_1P_TX_LP | \
>> -					 DCS_SW_0P_TX_LP | \
>> -					 GEN_LW_TX_LP | \
>> -					 GEN_SR_2P_TX_LP | \
>> -					 GEN_SR_1P_TX_LP | \
>> -					 GEN_SR_0P_TX_LP | \
>> -					 GEN_SW_2P_TX_LP | \
>> -					 GEN_SW_1P_TX_LP | \
>> -					 GEN_SW_0P_TX_LP)
>> -
>> -#define DSI_GEN_HDR			0x6c
>> -#define GEN_HDATA(data)			(((data) & 0xffff) << 8)
>> -#define GEN_HDATA_MASK			(0xffff << 8)
>> -#define GEN_HTYPE(type)			(((type) & 0xff) << 0)
>> -#define GEN_HTYPE_MASK			0xff
>> -
>> -#define DSI_GEN_PLD_DATA		0x70
>> -
>> -#define DSI_CMD_PKT_STATUS		0x74
>> -#define GEN_CMD_EMPTY			BIT(0)
>> -#define GEN_CMD_FULL			BIT(1)
>> -#define GEN_PLD_W_EMPTY			BIT(2)
>> -#define GEN_PLD_W_FULL			BIT(3)
>> -#define GEN_PLD_R_EMPTY			BIT(4)
>> -#define GEN_PLD_R_FULL			BIT(5)
>> -#define GEN_RD_CMD_BUSY			BIT(6)
>> -
>> -#define DSI_TO_CNT_CFG			0x78
>> -#define HSTX_TO_CNT(p)			(((p) & 0xffff) << 16)
>> -#define LPRX_TO_CNT(p)			((p) & 0xffff)
>> -
>> -#define DSI_BTA_TO_CNT			0x8c
>> -#define DSI_LPCLK_CTRL			0x94
>> -#define AUTO_CLKLANE_CTRL		BIT(1)
>> -#define PHY_TXREQUESTCLKHS		BIT(0)
>> -
>> -#define DSI_PHY_TMR_LPCLK_CFG		0x98
>> -#define PHY_CLKHS2LP_TIME(lbcc)		(((lbcc) & 0x3ff) << 16)
>> -#define PHY_CLKLP2HS_TIME(lbcc)		((lbcc) & 0x3ff)
>> -
>> -#define DSI_PHY_TMR_CFG			0x9c
>> -#define PHY_HS2LP_TIME(lbcc)		(((lbcc) & 0xff) << 24)
>> -#define PHY_LP2HS_TIME(lbcc)		(((lbcc) & 0xff) << 16)
>> -#define MAX_RD_TIME(lbcc)		((lbcc) & 0x7fff)
>> -
>> -#define DSI_PHY_RSTZ			0xa0
>> -#define PHY_DISFORCEPLL			0
>> -#define PHY_ENFORCEPLL			BIT(3)
>> -#define PHY_DISABLECLK			0
>> -#define PHY_ENABLECLK			BIT(2)
>> -#define PHY_RSTZ			0
>> -#define PHY_UNRSTZ			BIT(1)
>> -#define PHY_SHUTDOWNZ			0
>> -#define PHY_UNSHUTDOWNZ			BIT(0)
>> -
>> -#define DSI_PHY_IF_CFG			0xa4
>> -#define N_LANES(n)			((((n) - 1) & 0x3) << 0)
>> -#define PHY_STOP_WAIT_TIME(cycle)	(((cycle) & 0xff) << 8)
>> -
>> -#define DSI_PHY_STATUS			0xb0
>> -#define LOCK				BIT(0)
>> -#define STOP_STATE_CLK_LANE		BIT(2)
>> -
>> -#define DSI_PHY_TST_CTRL0		0xb4
>> -#define PHY_TESTCLK			BIT(1)
>> -#define PHY_UNTESTCLK			0
>> -#define PHY_TESTCLR			BIT(0)
>> -#define PHY_UNTESTCLR			0
>> -
>> -#define DSI_PHY_TST_CTRL1		0xb8
>> -#define PHY_TESTEN			BIT(16)
>> -#define PHY_UNTESTEN			0
>> -#define PHY_TESTDOUT(n)			(((n) & 0xff) << 8)
>> -#define PHY_TESTDIN(n)			(((n) & 0xff) << 0)
>> -
>> -#define DSI_INT_ST0			0xbc
>> -#define DSI_INT_ST1			0xc0
>> -#define DSI_INT_MSK0			0xc4
>> -#define DSI_INT_MSK1			0xc8
>> -
>> -#define PHY_STATUS_TIMEOUT_US		10000
>> -#define CMD_PKT_STATUS_TIMEOUT_US	20000
>> -
>> -#define BYPASS_VCO_RANGE	BIT(7)
>> -#define VCO_RANGE_CON_SEL(val)	(((val) & 0x7) << 3)
>> -#define VCO_IN_CAP_CON_DEFAULT	(0x0 << 1)
>> -#define VCO_IN_CAP_CON_LOW	(0x1 << 1)
>> -#define VCO_IN_CAP_CON_HIGH	(0x2 << 1)
>> -#define REF_BIAS_CUR_SEL	BIT(0)
>> -
>> -#define CP_CURRENT_3MA		BIT(3)
>> -#define CP_PROGRAM_EN		BIT(7)
>> -#define LPF_PROGRAM_EN		BIT(6)
>> -#define LPF_RESISTORS_20_KOHM	0
>> -
>> -#define HSFREQRANGE_SEL(val)	(((val) & 0x3f) << 1)
>> -
>> -#define INPUT_DIVIDER(val)	(((val) - 1) & 0x7f)
>> -#define LOW_PROGRAM_EN		0
>> -#define HIGH_PROGRAM_EN		BIT(7)
>> -#define LOOP_DIV_LOW_SEL(val)	(((val) - 1) & 0x1f)
>> -#define LOOP_DIV_HIGH_SEL(val)	((((val) - 1) >> 5) & 0x1f)
>> -#define PLL_LOOP_DIV_EN		BIT(5)
>> -#define PLL_INPUT_DIV_EN	BIT(4)
>> -
>> -#define POWER_CONTROL		BIT(6)
>> -#define INTERNAL_REG_CURRENT	BIT(3)
>> -#define BIAS_BLOCK_ON		BIT(2)
>> -#define BANDGAP_ON		BIT(0)
>> -
>> -#define TER_RESISTOR_HIGH	BIT(7)
>> -#define	TER_RESISTOR_LOW	0
>> -#define LEVEL_SHIFTERS_ON	BIT(6)
>> -#define TER_CAL_DONE		BIT(5)
>> -#define SETRD_MAX		(0x7 << 2)
>> -#define POWER_MANAGE		BIT(1)
>> -#define TER_RESISTORS_ON	BIT(0)
>> -
>> -#define BIASEXTR_SEL(val)	((val) & 0x7)
>> -#define BANDGAP_SEL(val)	((val) & 0x7)
>> -#define TLP_PROGRAM_EN		BIT(7)
>> -#define THS_PRE_PROGRAM_EN	BIT(7)
>> -#define THS_ZERO_PROGRAM_EN	BIT(6)
>> -
>> -#define DW_MIPI_NEEDS_PHY_CFG_CLK	BIT(0)
>> -#define DW_MIPI_NEEDS_GRF_CLK		BIT(1)
>> -
>> -enum {
>> -	BANDGAP_97_07,
>> -	BANDGAP_98_05,
>> -	BANDGAP_99_02,
>> -	BANDGAP_100_00,
>> -	BANDGAP_93_17,
>> -	BANDGAP_94_15,
>> -	BANDGAP_95_12,
>> -	BANDGAP_96_10,
>> -};
>> -
>> -enum {
>> -	BIASEXTR_87_1,
>> -	BIASEXTR_91_5,
>> -	BIASEXTR_95_9,
>> -	BIASEXTR_100,
>> -	BIASEXTR_105_94,
>> -	BIASEXTR_111_88,
>> -	BIASEXTR_118_8,
>> -	BIASEXTR_127_7,
>> -};
>> -
>> -struct dw_mipi_dsi_plat_data {
>> -	u32 dsi0_en_bit;
>> -	u32 dsi1_en_bit;
>> -	u32 grf_switch_reg;
>> -	u32 grf_dsi0_mode;
>> -	u32 grf_dsi0_mode_reg;
>> -	unsigned int flags;
>> -	unsigned int max_data_lanes;
>> -};
>> -
>> -struct dw_mipi_dsi {
>> -	struct drm_encoder encoder;
>> -	struct drm_connector connector;
>> -	struct mipi_dsi_host dsi_host;
>> -	struct drm_panel *panel;
>> -	struct device *dev;
>> -	struct regmap *grf_regmap;
>> -	void __iomem *base;
>> -
>> -	struct clk *grf_clk;
>> -	struct clk *pllref_clk;
>> -	struct clk *pclk;
>> -	struct clk *phy_cfg_clk;
>> -
>> -	int dpms_mode;
>> -	unsigned int lane_mbps; /* per lane */
>> -	u32 channel;
>> -	u32 lanes;
>> -	u32 format;
>> -	u16 input_div;
>> -	u16 feedback_div;
>> -	unsigned long mode_flags;
>> -
>> -	const struct dw_mipi_dsi_plat_data *pdata;
>> -};
>> -
>> -enum dw_mipi_dsi_mode {
>> -	DW_MIPI_DSI_CMD_MODE,
>> -	DW_MIPI_DSI_VID_MODE,
>> -};
>> -
>> -struct dphy_pll_testdin_map {
>> -	unsigned int max_mbps;
>> -	u8 testdin;
>> -};
>> -
>> -/* The table is based on 27MHz DPHY pll reference clock. */
>> -static const struct dphy_pll_testdin_map dptdin_map[] = {
>> -	{  90, 0x00}, { 100, 0x10}, { 110, 0x20}, { 130, 0x01},
>> -	{ 140, 0x11}, { 150, 0x21}, { 170, 0x02}, { 180, 0x12},
>> -	{ 200, 0x22}, { 220, 0x03}, { 240, 0x13}, { 250, 0x23},
>> -	{ 270, 0x04}, { 300, 0x14}, { 330, 0x05}, { 360, 0x15},
>> -	{ 400, 0x25}, { 450, 0x06}, { 500, 0x16}, { 550, 0x07},
>> -	{ 600, 0x17}, { 650, 0x08}, { 700, 0x18}, { 750, 0x09},
>> -	{ 800, 0x19}, { 850, 0x29}, { 900, 0x39}, { 950, 0x0a},
>> -	{1000, 0x1a}, {1050, 0x2a}, {1100, 0x3a}, {1150, 0x0b},
>> -	{1200, 0x1b}, {1250, 0x2b}, {1300, 0x3b}, {1350, 0x0c},
>> -	{1400, 0x1c}, {1450, 0x2c}, {1500, 0x3c}
>> -};
>> -
>> -static int max_mbps_to_testdin(unsigned int max_mbps)
>> -{
>> -	int i;
>> -
>> -	for (i = 0; i < ARRAY_SIZE(dptdin_map); i++)
>> -		if (dptdin_map[i].max_mbps > max_mbps)
>> -			return dptdin_map[i].testdin;
>> -
>> -	return -EINVAL;
>> -}
>> -
>> -/*
>> - * The controller should generate 2 frames before
>> - * preparing the peripheral.
>> - */
>> -static void dw_mipi_dsi_wait_for_two_frames(struct drm_display_mode *mode)
>> -{
>> -	int refresh, two_frames;
>> -
>> -	refresh = drm_mode_vrefresh(mode);
>> -	two_frames = DIV_ROUND_UP(MSEC_PER_SEC, refresh) * 2;
>> -	msleep(two_frames);
>> -}
>> -
>> -static inline struct dw_mipi_dsi *host_to_dsi(struct mipi_dsi_host *host)
>> -{
>> -	return container_of(host, struct dw_mipi_dsi, dsi_host);
>> -}
>> -
>> -static inline struct dw_mipi_dsi *con_to_dsi(struct drm_connector *con)
>> -{
>> -	return container_of(con, struct dw_mipi_dsi, connector);
>> -}
>> -
>> -static inline struct dw_mipi_dsi *encoder_to_dsi(struct drm_encoder *encoder)
>> -{
>> -	return container_of(encoder, struct dw_mipi_dsi, encoder);
>> -}
>> -
>> -static inline void dsi_write(struct dw_mipi_dsi *dsi, u32 reg, u32 val)
>> -{
>> -	writel(val, dsi->base + reg);
>> -}
>> -
>> -static inline u32 dsi_read(struct dw_mipi_dsi *dsi, u32 reg)
>> -{
>> -	return readl(dsi->base + reg);
>> -}
>> -
>> -static void dw_mipi_dsi_phy_write(struct dw_mipi_dsi *dsi, u8 test_code,
>> -				  u8 test_data)
>> -{
>> -	/*
>> -	 * With the falling edge on TESTCLK, the TESTDIN[7:0] signal content
>> -	 * is latched internally as the current test code. Test data is
>> -	 * programmed internally by rising edge on TESTCLK.
>> -	 */
>> -	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
>> -
>> -	dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_TESTEN | PHY_TESTDOUT(0) |
>> -					  PHY_TESTDIN(test_code));
>> -
>> -	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLK | PHY_UNTESTCLR);
>> -
>> -	dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_UNTESTEN | PHY_TESTDOUT(0) |
>> -					  PHY_TESTDIN(test_data));
>> -
>> -	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
>> -}
>> -
>> -/**
>> - * ns2bc - Nanoseconds to byte clock cycles
>> - */
>> -static inline unsigned int ns2bc(struct dw_mipi_dsi *dsi, int ns)
>> -{
>> -	return DIV_ROUND_UP(ns * dsi->lane_mbps / 8, 1000);
>> -}
>> -
>> -/**
>> - * ns2ui - Nanoseconds to UI time periods
>> - */
>> -static inline unsigned int ns2ui(struct dw_mipi_dsi *dsi, int ns)
>> -{
>> -	return DIV_ROUND_UP(ns * dsi->lane_mbps, 1000);
>> -}
>> -
>> -static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
>> -{
>> -	int ret, testdin, vco, val;
>> -
>> -	vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;
>> -
>> -	testdin = max_mbps_to_testdin(dsi->lane_mbps);
>> -	if (testdin < 0) {
>> -		DRM_DEV_ERROR(dsi->dev,
>> -			      "failed to get testdin for %dmbps lane clock\n",
>> -			      dsi->lane_mbps);
>> -		return testdin;
>> -	}
>> -
>> -	/* Start by clearing PHY state */
>> -	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
>> -	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLR);
>> -	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
>> -
>> -	ret = clk_prepare_enable(dsi->phy_cfg_clk);
>> -	if (ret) {
>> -		DRM_DEV_ERROR(dsi->dev, "Failed to enable phy_cfg_clk\n");
>> -		return ret;
>> -	}
>> -
>> -	dw_mipi_dsi_phy_write(dsi, 0x10, BYPASS_VCO_RANGE |
>> -					 VCO_RANGE_CON_SEL(vco) |
>> -					 VCO_IN_CAP_CON_LOW |
>> -					 REF_BIAS_CUR_SEL);
>> -
>> -	dw_mipi_dsi_phy_write(dsi, 0x11, CP_CURRENT_3MA);
>> -	dw_mipi_dsi_phy_write(dsi, 0x12, CP_PROGRAM_EN | LPF_PROGRAM_EN |
>> -					 LPF_RESISTORS_20_KOHM);
>> -
>> -	dw_mipi_dsi_phy_write(dsi, 0x44, HSFREQRANGE_SEL(testdin));
>> -
>> -	dw_mipi_dsi_phy_write(dsi, 0x17, INPUT_DIVIDER(dsi->input_div));
>> -	dw_mipi_dsi_phy_write(dsi, 0x18, LOOP_DIV_LOW_SEL(dsi->feedback_div) |
>> -					 LOW_PROGRAM_EN);
>> -	dw_mipi_dsi_phy_write(dsi, 0x18, LOOP_DIV_HIGH_SEL(dsi->feedback_div) |
>> -					 HIGH_PROGRAM_EN);
>> -	dw_mipi_dsi_phy_write(dsi, 0x19, PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
>> -
>> -	dw_mipi_dsi_phy_write(dsi, 0x22, LOW_PROGRAM_EN |
>> -					 BIASEXTR_SEL(BIASEXTR_127_7));
>> -	dw_mipi_dsi_phy_write(dsi, 0x22, HIGH_PROGRAM_EN |
>> -					 BANDGAP_SEL(BANDGAP_96_10));
>> -
>> -	dw_mipi_dsi_phy_write(dsi, 0x20, POWER_CONTROL | INTERNAL_REG_CURRENT |
>> -					 BIAS_BLOCK_ON | BANDGAP_ON);
>> -
>> -	dw_mipi_dsi_phy_write(dsi, 0x21, TER_RESISTOR_LOW | TER_CAL_DONE |
>> -					 SETRD_MAX | TER_RESISTORS_ON);
>> -	dw_mipi_dsi_phy_write(dsi, 0x21, TER_RESISTOR_HIGH | LEVEL_SHIFTERS_ON |
>> -					 SETRD_MAX | POWER_MANAGE |
>> -					 TER_RESISTORS_ON);
>> -
>> -	dw_mipi_dsi_phy_write(dsi, 0x60, TLP_PROGRAM_EN | ns2bc(dsi, 500));
>> -	dw_mipi_dsi_phy_write(dsi, 0x61, THS_PRE_PROGRAM_EN | ns2ui(dsi, 40));
>> -	dw_mipi_dsi_phy_write(dsi, 0x62, THS_ZERO_PROGRAM_EN | ns2bc(dsi, 300));
>> -	dw_mipi_dsi_phy_write(dsi, 0x63, THS_PRE_PROGRAM_EN | ns2ui(dsi, 100));
>> -	dw_mipi_dsi_phy_write(dsi, 0x64, BIT(5) | ns2bc(dsi, 100));
>> -	dw_mipi_dsi_phy_write(dsi, 0x65, BIT(5) | (ns2bc(dsi, 60) + 7));
>> -
>> -	dw_mipi_dsi_phy_write(dsi, 0x70, TLP_PROGRAM_EN | ns2bc(dsi, 500));
>> -	dw_mipi_dsi_phy_write(dsi, 0x71,
>> -			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 50) + 5));
>> -	dw_mipi_dsi_phy_write(dsi, 0x72,
>> -			      THS_ZERO_PROGRAM_EN | (ns2bc(dsi, 140) + 2));
>> -	dw_mipi_dsi_phy_write(dsi, 0x73,
>> -			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 60) + 8));
>> -	dw_mipi_dsi_phy_write(dsi, 0x74, BIT(5) | ns2bc(dsi, 100));
>> -
>> -	dsi_write(dsi, DSI_PHY_RSTZ, PHY_ENFORCEPLL | PHY_ENABLECLK |
>> -				     PHY_UNRSTZ | PHY_UNSHUTDOWNZ);
>> -
>> -	ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
>> -				 val, val & LOCK, 1000, PHY_STATUS_TIMEOUT_US);
>> -	if (ret < 0) {
>> -		DRM_DEV_ERROR(dsi->dev, "failed to wait for phy lock state\n");
>> -		goto phy_init_end;
>> -	}
>> -
>> -	ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
>> -				 val, val & STOP_STATE_CLK_LANE, 1000,
>> -				 PHY_STATUS_TIMEOUT_US);
>> -	if (ret < 0)
>> -		DRM_DEV_ERROR(dsi->dev,
>> -			      "failed to wait for phy clk lane stop state\n");
>> -
>> -phy_init_end:
>> -	clk_disable_unprepare(dsi->phy_cfg_clk);
>> -
>> -	return ret;
>> -}
>> -
>> -static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi,
>> -				    struct drm_display_mode *mode)
>> -{
>> -	unsigned int i, pre;
>> -	unsigned long mpclk, pllref, tmp;
>> -	unsigned int m = 1, n = 1, target_mbps = 1000;
>> -	unsigned int max_mbps = dptdin_map[ARRAY_SIZE(dptdin_map) - 1].max_mbps;
>> -	int bpp;
>> -
>> -	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
>> -	if (bpp < 0) {
>> -		DRM_DEV_ERROR(dsi->dev,
>> -			      "failed to get bpp for pixel format %d\n",
>> -			      dsi->format);
>> -		return bpp;
>> -	}
>> -
>> -	mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC);
>> -	if (mpclk) {
>> -		/* take 1 / 0.8, since mbps must big than bandwidth of RGB */
>> -		tmp = mpclk * (bpp / dsi->lanes) * 10 / 8;
>> -		if (tmp < max_mbps)
>> -			target_mbps = tmp;
>> -		else
>> -			DRM_DEV_ERROR(dsi->dev,
>> -				      "DPHY clock frequency is out of range\n");
>> -	}
>> -
>> -	pllref = DIV_ROUND_UP(clk_get_rate(dsi->pllref_clk), USEC_PER_SEC);
>> -	tmp = pllref;
>> -
>> -	/*
>> -	 * The limits on the PLL divisor are:
>> -	 *
>> -	 *	5MHz <= (pllref / n) <= 40MHz
>> -	 *
>> -	 * we walk over these values in descreasing order so that if we hit
>> -	 * an exact match for target_mbps it is more likely that "m" will be
>> -	 * even.
>> -	 *
>> -	 * TODO: ensure that "m" is even after this loop.
>> -	 */
>> -	for (i = pllref / 5; i > (pllref / 40); i--) {
>> -		pre = pllref / i;
>> -		if ((tmp > (target_mbps % pre)) && (target_mbps / pre < 512)) {
>> -			tmp = target_mbps % pre;
>> -			n = i;
>> -			m = target_mbps / pre;
>> -		}
>> -		if (tmp == 0)
>> -			break;
>> -	}
>> -
>> -	dsi->lane_mbps = pllref / n * m;
>> -	dsi->input_div = n;
>> -	dsi->feedback_div = m;
>> -
>> -	return 0;
>> -}
>> -
>> -static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
>> -				   struct mipi_dsi_device *device)
>> -{
>> -	struct dw_mipi_dsi *dsi = host_to_dsi(host);
>> -
>> -	if (device->lanes > dsi->pdata->max_data_lanes) {
>> -		DRM_DEV_ERROR(dsi->dev,
>> -			      "the number of data lanes(%u) is too many\n",
>> -			      device->lanes);
>> -		return -EINVAL;
>> -	}
>> -
>> -	dsi->lanes = device->lanes;
>> -	dsi->channel = device->channel;
>> -	dsi->format = device->format;
>> -	dsi->mode_flags = device->mode_flags;
>> -	dsi->panel = of_drm_find_panel(device->dev.of_node);
>> -	if (dsi->panel)
>> -		return drm_panel_attach(dsi->panel, &dsi->connector);
>> -
>> -	return -EINVAL;
>> -}
>> -
>> -static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host,
>> -				   struct mipi_dsi_device *device)
>> -{
>> -	struct dw_mipi_dsi *dsi = host_to_dsi(host);
>> -
>> -	drm_panel_detach(dsi->panel);
>> -
>> -	return 0;
>> -}
>> -
>> -static void dw_mipi_message_config(struct dw_mipi_dsi *dsi,
>> -				   const struct mipi_dsi_msg *msg)
>> -{
>> -	bool lpm = msg->flags & MIPI_DSI_MSG_USE_LPM;
>> -	u32 val = 0;
>> -
>> -	if (msg->flags & MIPI_DSI_MSG_REQ_ACK)
>> -		val |= EN_ACK_RQST;
>> -	if (lpm)
>> -		val |= CMD_MODE_ALL_LP;
>> -
>> -	dsi_write(dsi, DSI_LPCLK_CTRL, lpm ? 0 : PHY_TXREQUESTCLKHS);
>> -	dsi_write(dsi, DSI_CMD_MODE_CFG, val);
>> -}
>> -
>> -static int dw_mipi_dsi_gen_pkt_hdr_write(struct dw_mipi_dsi *dsi, u32 hdr_val)
>> -{
>> -	int ret;
>> -	u32 val, mask;
>> -
>> -	ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
>> -				 val, !(val & GEN_CMD_FULL), 1000,
>> -				 CMD_PKT_STATUS_TIMEOUT_US);
>> -	if (ret < 0) {
>> -		DRM_DEV_ERROR(dsi->dev,
>> -			      "failed to get available command FIFO\n");
>> -		return ret;
>> -	}
>> -
>> -	dsi_write(dsi, DSI_GEN_HDR, hdr_val);
>> -
>> -	mask = GEN_CMD_EMPTY | GEN_PLD_W_EMPTY;
>> -	ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
>> -				 val, (val & mask) == mask,
>> -				 1000, CMD_PKT_STATUS_TIMEOUT_US);
>> -	if (ret < 0) {
>> -		DRM_DEV_ERROR(dsi->dev, "failed to write command FIFO\n");
>> -		return ret;
>> -	}
>> -
>> -	return 0;
>> -}
>> -
>> -static int dw_mipi_dsi_dcs_short_write(struct dw_mipi_dsi *dsi,
>> -				       const struct mipi_dsi_msg *msg)
>> -{
>> -	const u8 *tx_buf = msg->tx_buf;
>> -	u16 data = 0;
>> -	u32 val;
>> -
>> -	if (msg->tx_len > 0)
>> -		data |= tx_buf[0];
>> -	if (msg->tx_len > 1)
>> -		data |= tx_buf[1] << 8;
>> -
>> -	if (msg->tx_len > 2) {
>> -		DRM_DEV_ERROR(dsi->dev,
>> -			      "too long tx buf length %zu for short write\n",
>> -			      msg->tx_len);
>> -		return -EINVAL;
>> -	}
>> -
>> -	val = GEN_HDATA(data) | GEN_HTYPE(msg->type);
>> -	return dw_mipi_dsi_gen_pkt_hdr_write(dsi, val);
>> -}
>> -
>> -static int dw_mipi_dsi_dcs_long_write(struct dw_mipi_dsi *dsi,
>> -				      const struct mipi_dsi_msg *msg)
>> -{
>> -	const u8 *tx_buf = msg->tx_buf;
>> -	int len = msg->tx_len, pld_data_bytes = sizeof(u32), ret;
>> -	u32 hdr_val = GEN_HDATA(msg->tx_len) | GEN_HTYPE(msg->type);
>> -	u32 remainder;
>> -	u32 val;
>> -
>> -	if (msg->tx_len < 3) {
>> -		DRM_DEV_ERROR(dsi->dev,
>> -			      "wrong tx buf length %zu for long write\n",
>> -			      msg->tx_len);
>> -		return -EINVAL;
>> -	}
>> -
>> -	while (DIV_ROUND_UP(len, pld_data_bytes)) {
>> -		if (len < pld_data_bytes) {
>> -			remainder = 0;
>> -			memcpy(&remainder, tx_buf, len);
>> -			dsi_write(dsi, DSI_GEN_PLD_DATA, remainder);
>> -			len = 0;
>> -		} else {
>> -			memcpy(&remainder, tx_buf, pld_data_bytes);
>> -			dsi_write(dsi, DSI_GEN_PLD_DATA, remainder);
>> -			tx_buf += pld_data_bytes;
>> -			len -= pld_data_bytes;
>> -		}
>> -
>> -		ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
>> -					 val, !(val & GEN_PLD_W_FULL), 1000,
>> -					 CMD_PKT_STATUS_TIMEOUT_US);
>> -		if (ret < 0) {
>> -			DRM_DEV_ERROR(dsi->dev,
>> -				      "failed to get available write payload FIFO\n");
>> -			return ret;
>> -		}
>> -	}
>> -
>> -	return dw_mipi_dsi_gen_pkt_hdr_write(dsi, hdr_val);
>> -}
>> -
>> -static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host,
>> -					 const struct mipi_dsi_msg *msg)
>> -{
>> -	struct dw_mipi_dsi *dsi = host_to_dsi(host);
>> -	int ret;
>> -
>> -	dw_mipi_message_config(dsi, msg);
>> -
>> -	switch (msg->type) {
>> -	case MIPI_DSI_DCS_SHORT_WRITE:
>> -	case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
>> -	case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE:
>> -		ret = dw_mipi_dsi_dcs_short_write(dsi, msg);
>> -		break;
>> -	case MIPI_DSI_DCS_LONG_WRITE:
>> -		ret = dw_mipi_dsi_dcs_long_write(dsi, msg);
>> -		break;
>> -	default:
>> -		DRM_DEV_ERROR(dsi->dev, "unsupported message type 0x%02x\n",
>> -			      msg->type);
>> -		ret = -EINVAL;
>> -	}
>> -
>> -	return ret;
>> -}
>> -
>> -static const struct mipi_dsi_host_ops dw_mipi_dsi_host_ops = {
>> -	.attach = dw_mipi_dsi_host_attach,
>> -	.detach = dw_mipi_dsi_host_detach,
>> -	.transfer = dw_mipi_dsi_host_transfer,
>> -};
>> -
>> -static void dw_mipi_dsi_video_mode_config(struct dw_mipi_dsi *dsi)
>> -{
>> -	u32 val;
>> -
>> -	val = ENABLE_LOW_POWER;
>> -
>> -	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
>> -		val |= VID_MODE_TYPE_BURST;
>> -	else if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
>> -		val |= VID_MODE_TYPE_NON_BURST_SYNC_PULSES;
>> -	else
>> -		val |= VID_MODE_TYPE_NON_BURST_SYNC_EVENTS;
>> -
>> -	dsi_write(dsi, DSI_VID_MODE_CFG, val);
>> -}
>> -
>> -static void dw_mipi_dsi_set_mode(struct dw_mipi_dsi *dsi,
>> -				 enum dw_mipi_dsi_mode mode)
>> -{
>> -	if (mode == DW_MIPI_DSI_CMD_MODE) {
>> -		dsi_write(dsi, DSI_PWR_UP, RESET);
>> -		dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE);
>> -		dsi_write(dsi, DSI_PWR_UP, POWERUP);
>> -	} else {
>> -		dsi_write(dsi, DSI_PWR_UP, RESET);
>> -		dsi_write(dsi, DSI_MODE_CFG, ENABLE_VIDEO_MODE);
>> -		dw_mipi_dsi_video_mode_config(dsi);
>> -		dsi_write(dsi, DSI_LPCLK_CTRL, PHY_TXREQUESTCLKHS);
>> -		dsi_write(dsi, DSI_PWR_UP, POWERUP);
>> -	}
>> -}
>> -
>> -static void dw_mipi_dsi_disable(struct dw_mipi_dsi *dsi)
>> -{
>> -	dsi_write(dsi, DSI_PWR_UP, RESET);
>> -	dsi_write(dsi, DSI_PHY_RSTZ, PHY_RSTZ);
>> -}
>> -
>> -static void dw_mipi_dsi_init(struct dw_mipi_dsi *dsi)
>> -{
>> -	/*
>> -	 * The maximum permitted escape clock is 20MHz and it is derived from
>> -	 * lanebyteclk, which is running at "lane_mbps / 8".  Thus we want:
>> -	 *
>> -	 *     (lane_mbps >> 3) / esc_clk_division < 20
>> -	 * which is:
>> -	 *     (lane_mbps >> 3) / 20 > esc_clk_division
>> -	 */
>> -	u32 esc_clk_division = (dsi->lane_mbps >> 3) / 20 + 1;
>> -
>> -	dsi_write(dsi, DSI_PWR_UP, RESET);
>> -	dsi_write(dsi, DSI_PHY_RSTZ, PHY_DISFORCEPLL | PHY_DISABLECLK
>> -		  | PHY_RSTZ | PHY_SHUTDOWNZ);
>> -	dsi_write(dsi, DSI_CLKMGR_CFG, TO_CLK_DIVIDSION(10) |
>> -		  TX_ESC_CLK_DIVIDSION(esc_clk_division));
>> -}
>> -
>> -static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi,
>> -				   struct drm_display_mode *mode)
>> -{
>> -	u32 val = 0, color = 0;
>> -
>> -	switch (dsi->format) {
>> -	case MIPI_DSI_FMT_RGB888:
>> -		color = DPI_COLOR_CODING_24BIT;
>> -		break;
>> -	case MIPI_DSI_FMT_RGB666:
>> -		color = DPI_COLOR_CODING_18BIT_2 | EN18_LOOSELY;
>> -		break;
>> -	case MIPI_DSI_FMT_RGB666_PACKED:
>> -		color = DPI_COLOR_CODING_18BIT_1;
>> -		break;
>> -	case MIPI_DSI_FMT_RGB565:
>> -		color = DPI_COLOR_CODING_16BIT_1;
>> -		break;
>> -	}
>> -
>> -	if (mode->flags & DRM_MODE_FLAG_NVSYNC)
>> -		val |= VSYNC_ACTIVE_LOW;
>> -	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
>> -		val |= HSYNC_ACTIVE_LOW;
>> -
>> -	dsi_write(dsi, DSI_DPI_VCID, DPI_VID(dsi->channel));
>> -	dsi_write(dsi, DSI_DPI_COLOR_CODING, color);
>> -	dsi_write(dsi, DSI_DPI_CFG_POL, val);
>> -	dsi_write(dsi, DSI_DPI_LP_CMD_TIM, OUTVACT_LPCMD_TIME(4)
>> -		  | INVACT_LPCMD_TIME(4));
>> -}
>> -
>> -static void dw_mipi_dsi_packet_handler_config(struct dw_mipi_dsi *dsi)
>> -{
>> -	dsi_write(dsi, DSI_PCKHDL_CFG, EN_CRC_RX | EN_ECC_RX | EN_BTA);
>> -}
>> -
>> -static void dw_mipi_dsi_video_packet_config(struct dw_mipi_dsi *dsi,
>> -					    struct drm_display_mode *mode)
>> -{
>> -	dsi_write(dsi, DSI_VID_PKT_SIZE, VID_PKT_SIZE(mode->hdisplay));
>> -}
>> -
>> -static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi)
>> -{
>> -	dsi_write(dsi, DSI_TO_CNT_CFG, HSTX_TO_CNT(1000) | LPRX_TO_CNT(1000));
>> -	dsi_write(dsi, DSI_BTA_TO_CNT, 0xd00);
>> -	dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE);
>> -}
>> -
>> -/* Get lane byte clock cycles. */
>> -static u32 dw_mipi_dsi_get_hcomponent_lbcc(struct dw_mipi_dsi *dsi,
>> -					   struct drm_display_mode *mode,
>> -					   u32 hcomponent)
>> -{
>> -	u32 frac, lbcc;
>> -
>> -	lbcc = hcomponent * dsi->lane_mbps * MSEC_PER_SEC / 8;
>> -
>> -	frac = lbcc % mode->clock;
>> -	lbcc = lbcc / mode->clock;
>> -	if (frac)
>> -		lbcc++;
>> -
>> -	return lbcc;
>> -}
>> -
>> -static void dw_mipi_dsi_line_timer_config(struct dw_mipi_dsi *dsi,
>> -					  struct drm_display_mode *mode)
>> -{
>> -	u32 htotal, hsa, hbp, lbcc;
>> -
>> -	htotal = mode->htotal;
>> -	hsa = mode->hsync_end - mode->hsync_start;
>> -	hbp = mode->htotal - mode->hsync_end;
>> -
>> -	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, htotal);
>> -	dsi_write(dsi, DSI_VID_HLINE_TIME, lbcc);
>> -
>> -	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, hsa);
>> -	dsi_write(dsi, DSI_VID_HSA_TIME, lbcc);
>> -
>> -	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, hbp);
>> -	dsi_write(dsi, DSI_VID_HBP_TIME, lbcc);
>> -}
>> -
>> -static void dw_mipi_dsi_vertical_timing_config(struct dw_mipi_dsi *dsi,
>> -					       struct drm_display_mode *mode)
>> -{
>> -	u32 vactive, vsa, vfp, vbp;
>> -
>> -	vactive = mode->vdisplay;
>> -	vsa = mode->vsync_end - mode->vsync_start;
>> -	vfp = mode->vsync_start - mode->vdisplay;
>> -	vbp = mode->vtotal - mode->vsync_end;
>> -
>> -	dsi_write(dsi, DSI_VID_VACTIVE_LINES, vactive);
>> -	dsi_write(dsi, DSI_VID_VSA_LINES, vsa);
>> -	dsi_write(dsi, DSI_VID_VFP_LINES, vfp);
>> -	dsi_write(dsi, DSI_VID_VBP_LINES, vbp);
>> -}
>> -
>> -static void dw_mipi_dsi_dphy_timing_config(struct dw_mipi_dsi *dsi)
>> -{
>> -	dsi_write(dsi, DSI_PHY_TMR_CFG, PHY_HS2LP_TIME(0x40)
>> -		  | PHY_LP2HS_TIME(0x40) | MAX_RD_TIME(10000));
>> -
>> -	dsi_write(dsi, DSI_PHY_TMR_LPCLK_CFG, PHY_CLKHS2LP_TIME(0x40)
>> -		  | PHY_CLKLP2HS_TIME(0x40));
>> -}
>> -
>> -static void dw_mipi_dsi_dphy_interface_config(struct dw_mipi_dsi *dsi)
>> -{
>> -	dsi_write(dsi, DSI_PHY_IF_CFG, PHY_STOP_WAIT_TIME(0x20) |
>> -		  N_LANES(dsi->lanes));
>> -}
>> -
>> -static void dw_mipi_dsi_clear_err(struct dw_mipi_dsi *dsi)
>> -{
>> -	dsi_read(dsi, DSI_INT_ST0);
>> -	dsi_read(dsi, DSI_INT_ST1);
>> -	dsi_write(dsi, DSI_INT_MSK0, 0);
>> -	dsi_write(dsi, DSI_INT_MSK1, 0);
>> -}
>> -
>> -static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
>> -{
>> -	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
>> -
>> -	if (dsi->dpms_mode != DRM_MODE_DPMS_ON)
>> -		return;
>> -
>> -	if (clk_prepare_enable(dsi->pclk)) {
>> -		DRM_DEV_ERROR(dsi->dev, "Failed to enable pclk\n");
>> -		return;
>> -	}
>> -
>> -	drm_panel_disable(dsi->panel);
>> -
>> -	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_CMD_MODE);
>> -	drm_panel_unprepare(dsi->panel);
>> -
>> -	dw_mipi_dsi_disable(dsi);
>> -	pm_runtime_put(dsi->dev);
>> -	clk_disable_unprepare(dsi->pclk);
>> -	dsi->dpms_mode = DRM_MODE_DPMS_OFF;
>> -}
>> -
>> -static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
>> -{
>> -	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
>> -	struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
>> -	const struct dw_mipi_dsi_plat_data *pdata = dsi->pdata;
>> -	int mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node, encoder);
>> -	u32 val;
>> -	int ret;
>> -
>> -	ret = dw_mipi_dsi_get_lane_bps(dsi, mode);
>> -	if (ret < 0)
>> -		return;
>> -
>> -	if (dsi->dpms_mode == DRM_MODE_DPMS_ON)
>> -		return;
>> -
>> -	if (clk_prepare_enable(dsi->pclk)) {
>> -		DRM_DEV_ERROR(dsi->dev, "Failed to enable pclk\n");
>> -		return;
>> -	}
>> -
>> -	pm_runtime_get_sync(dsi->dev);
>> -	dw_mipi_dsi_init(dsi);
>> -	dw_mipi_dsi_dpi_config(dsi, mode);
>> -	dw_mipi_dsi_packet_handler_config(dsi);
>> -	dw_mipi_dsi_video_mode_config(dsi);
>> -	dw_mipi_dsi_video_packet_config(dsi, mode);
>> -	dw_mipi_dsi_command_mode_config(dsi);
>> -	dw_mipi_dsi_line_timer_config(dsi, mode);
>> -	dw_mipi_dsi_vertical_timing_config(dsi, mode);
>> -	dw_mipi_dsi_dphy_timing_config(dsi);
>> -	dw_mipi_dsi_dphy_interface_config(dsi);
>> -	dw_mipi_dsi_clear_err(dsi);
>> -
>> -	/*
>> -	 * For the RK3399, the clk of grf must be enabled before writing grf
>> -	 * register. And for RK3288 or other soc, this grf_clk must be NULL,
>> -	 * the clk_prepare_enable return true directly.
>> -	 */
>> -	ret = clk_prepare_enable(dsi->grf_clk);
>> -	if (ret) {
>> -		DRM_DEV_ERROR(dsi->dev, "Failed to enable grf_clk: %d\n", ret);
>> -		return;
>> -	}
>> -
>> -	if (pdata->grf_dsi0_mode_reg)
>> -		regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
>> -			     pdata->grf_dsi0_mode);
>> -
>> -	dw_mipi_dsi_phy_init(dsi);
>> -	dw_mipi_dsi_wait_for_two_frames(mode);
>> -
>> -	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_CMD_MODE);
>> -	if (drm_panel_prepare(dsi->panel))
>> -		DRM_DEV_ERROR(dsi->dev, "failed to prepare panel\n");
>> -
>> -	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_VID_MODE);
>> -	drm_panel_enable(dsi->panel);
>> -
>> -	clk_disable_unprepare(dsi->pclk);
>> -
>> -	if (mux)
>> -		val = pdata->dsi0_en_bit | (pdata->dsi0_en_bit << 16);
>> -	else
>> -		val = pdata->dsi0_en_bit << 16;
>> -
>> -	regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
>> -	DRM_DEV_DEBUG(dsi->dev,
>> -		      "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG");
>> -	dsi->dpms_mode = DRM_MODE_DPMS_ON;
>> -
>> -	clk_disable_unprepare(dsi->grf_clk);
>> -}
>> -
>> -static int
>> -dw_mipi_dsi_encoder_atomic_check(struct drm_encoder *encoder,
>> -				 struct drm_crtc_state *crtc_state,
>> -				 struct drm_connector_state *conn_state)
>> -{
>> -	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
>> -	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
>> -
>> -	switch (dsi->format) {
>> -	case MIPI_DSI_FMT_RGB888:
>> -		s->output_mode = ROCKCHIP_OUT_MODE_P888;
>> -		break;
>> -	case MIPI_DSI_FMT_RGB666:
>> -		s->output_mode = ROCKCHIP_OUT_MODE_P666;
>> -		break;
>> -	case MIPI_DSI_FMT_RGB565:
>> -		s->output_mode = ROCKCHIP_OUT_MODE_P565;
>> -		break;
>> -	default:
>> -		WARN_ON(1);
>> -		return -EINVAL;
>> -	}
>> -
>> -	s->output_type = DRM_MODE_CONNECTOR_DSI;
>> -
>> -	return 0;
>> -}
>> -
>> -static const struct drm_encoder_helper_funcs
>> -dw_mipi_dsi_encoder_helper_funcs = {
>> -	.enable = dw_mipi_dsi_encoder_enable,
>> -	.disable = dw_mipi_dsi_encoder_disable,
>> -	.atomic_check = dw_mipi_dsi_encoder_atomic_check,
>> -};
>> -
>> -static const struct drm_encoder_funcs dw_mipi_dsi_encoder_funcs = {
>> -	.destroy = drm_encoder_cleanup,
>> -};
>> -
>> -static int dw_mipi_dsi_connector_get_modes(struct drm_connector *connector)
>> -{
>> -	struct dw_mipi_dsi *dsi = con_to_dsi(connector);
>> -
>> -	return drm_panel_get_modes(dsi->panel);
>> -}
>> -
>> -static struct drm_connector_helper_funcs dw_mipi_dsi_connector_helper_funcs = {
>> -	.get_modes = dw_mipi_dsi_connector_get_modes,
>> -};
>> -
>> -static void dw_mipi_dsi_drm_connector_destroy(struct drm_connector *connector)
>> -{
>> -	drm_connector_unregister(connector);
>> -	drm_connector_cleanup(connector);
>> -}
>> -
>> -static const struct drm_connector_funcs dw_mipi_dsi_atomic_connector_funcs = {
>> -	.fill_modes = drm_helper_probe_single_connector_modes,
>> -	.destroy = dw_mipi_dsi_drm_connector_destroy,
>> -	.reset = drm_atomic_helper_connector_reset,
>> -	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
>> -	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
>> -};
>> -
>> -static int dw_mipi_dsi_register(struct drm_device *drm,
>> -				struct dw_mipi_dsi *dsi)
>> -{
>> -	struct drm_encoder *encoder = &dsi->encoder;
>> -	struct drm_connector *connector = &dsi->connector;
>> -	struct device *dev = dsi->dev;
>> -	int ret;
>> -
>> -	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm,
>> -							     dev->of_node);
>> -	/*
>> -	 * If we failed to find the CRTC(s) which this encoder is
>> -	 * supposed to be connected to, it's because the CRTC has
>> -	 * not been registered yet.  Defer probing, and hope that
>> -	 * the required CRTC is added later.
>> -	 */
>> -	if (encoder->possible_crtcs == 0)
>> -		return -EPROBE_DEFER;
>> -
>> -	drm_encoder_helper_add(&dsi->encoder,
>> -			       &dw_mipi_dsi_encoder_helper_funcs);
>> -	ret = drm_encoder_init(drm, &dsi->encoder, &dw_mipi_dsi_encoder_funcs,
>> -			       DRM_MODE_ENCODER_DSI, NULL);
>> -	if (ret) {
>> -		DRM_DEV_ERROR(dev, "Failed to initialize encoder with drm\n");
>> -		return ret;
>> -	}
>> -
>> -	drm_connector_helper_add(connector,
>> -				 &dw_mipi_dsi_connector_helper_funcs);
>> -
>> -	drm_connector_init(drm, &dsi->connector,
>> -			   &dw_mipi_dsi_atomic_connector_funcs,
>> -			   DRM_MODE_CONNECTOR_DSI);
>> -
>> -	drm_mode_connector_attach_encoder(connector, encoder);
>> -
>> -	return 0;
>> -}
>> -
>> -static int rockchip_mipi_parse_dt(struct dw_mipi_dsi *dsi)
>> -{
>> -	struct device_node *np = dsi->dev->of_node;
>> -
>> -	dsi->grf_regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
>> -	if (IS_ERR(dsi->grf_regmap)) {
>> -		DRM_DEV_ERROR(dsi->dev, "Unable to get rockchip,grf\n");
>> -		return PTR_ERR(dsi->grf_regmap);
>> -	}
>> -
>> -	return 0;
>> -}
>> -
>> -static struct dw_mipi_dsi_plat_data rk3288_mipi_dsi_drv_data = {
>> -	.dsi0_en_bit = RK3288_DSI0_SEL_VOP_LIT,
>> -	.dsi1_en_bit = RK3288_DSI1_SEL_VOP_LIT,
>> -	.grf_switch_reg = RK3288_GRF_SOC_CON6,
>> -	.max_data_lanes = 4,
>> -};
>> -
>> -static struct dw_mipi_dsi_plat_data rk3399_mipi_dsi_drv_data = {
>> -	.dsi0_en_bit = RK3399_DSI0_SEL_VOP_LIT,
>> -	.dsi1_en_bit = RK3399_DSI1_SEL_VOP_LIT,
>> -	.grf_switch_reg = RK3399_GRF_SOC_CON20,
>> -	.grf_dsi0_mode = RK3399_GRF_DSI_MODE,
>> -	.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
>> -	.flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK,
>> -	.max_data_lanes = 4,
>> -};
>> -
>> -static const struct of_device_id dw_mipi_dsi_dt_ids[] = {
>> -	{
>> -	 .compatible = "rockchip,rk3288-mipi-dsi",
>> -	 .data = &rk3288_mipi_dsi_drv_data,
>> -	}, {
>> -	 .compatible = "rockchip,rk3399-mipi-dsi",
>> -	 .data = &rk3399_mipi_dsi_drv_data,
>> -	},
>> -	{ /* sentinel */ }
>> -};
>> -MODULE_DEVICE_TABLE(of, dw_mipi_dsi_dt_ids);
>> -
>> -static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
>> -			    void *data)
>> -{
>> -	const struct of_device_id *of_id =
>> -			of_match_device(dw_mipi_dsi_dt_ids, dev);
>> -	const struct dw_mipi_dsi_plat_data *pdata = of_id->data;
>> -	struct platform_device *pdev = to_platform_device(dev);
>> -	struct reset_control *apb_rst;
>> -	struct drm_device *drm = data;
>> -	struct dw_mipi_dsi *dsi;
>> -	struct resource *res;
>> -	int ret;
>> -
>> -	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
>> -	if (!dsi)
>> -		return -ENOMEM;
>> -
>> -	dsi->dev = dev;
>> -	dsi->pdata = pdata;
>> -	dsi->dpms_mode = DRM_MODE_DPMS_OFF;
>> -
>> -	ret = rockchip_mipi_parse_dt(dsi);
>> -	if (ret)
>> -		return ret;
>> -
>> -	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> -	if (!res)
>> -		return -ENODEV;
>> -
>> -	dsi->base = devm_ioremap_resource(dev, res);
>> -	if (IS_ERR(dsi->base))
>> -		return PTR_ERR(dsi->base);
>> -
>> -	dsi->pllref_clk = devm_clk_get(dev, "ref");
>> -	if (IS_ERR(dsi->pllref_clk)) {
>> -		ret = PTR_ERR(dsi->pllref_clk);
>> -		DRM_DEV_ERROR(dev,
>> -			      "Unable to get pll reference clock: %d\n", ret);
>> -		return ret;
>> -	}
>> -
>> -	dsi->pclk = devm_clk_get(dev, "pclk");
>> -	if (IS_ERR(dsi->pclk)) {
>> -		ret = PTR_ERR(dsi->pclk);
>> -		DRM_DEV_ERROR(dev, "Unable to get pclk: %d\n", ret);
>> -		return ret;
>> -	}
>> -
>> -	/*
>> -	 * Note that the reset was not defined in the initial device tree, so
>> -	 * we have to be prepared for it not being found.
>> -	 */
>> -	apb_rst = devm_reset_control_get(dev, "apb");
>> -	if (IS_ERR(apb_rst)) {
>> -		ret = PTR_ERR(apb_rst);
>> -		if (ret == -ENOENT) {
>> -			apb_rst = NULL;
>> -		} else {
>> -			DRM_DEV_ERROR(dev,
>> -				      "Unable to get reset control: %d\n", ret);
>> -			return ret;
>> -		}
>> -	}
>> -
>> -	if (apb_rst) {
>> -		ret = clk_prepare_enable(dsi->pclk);
>> -		if (ret) {
>> -			DRM_DEV_ERROR(dev, "Failed to enable pclk\n");
>> -			return ret;
>> -		}
>> -
>> -		reset_control_assert(apb_rst);
>> -		usleep_range(10, 20);
>> -		reset_control_deassert(apb_rst);
>> -
>> -		clk_disable_unprepare(dsi->pclk);
>> -	}
>> -
>> -	if (pdata->flags & DW_MIPI_NEEDS_PHY_CFG_CLK) {
>> -		dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
>> -		if (IS_ERR(dsi->phy_cfg_clk)) {
>> -			ret = PTR_ERR(dsi->phy_cfg_clk);
>> -			DRM_DEV_ERROR(dev,
>> -				      "Unable to get phy_cfg_clk: %d\n", ret);
>> -			return ret;
>> -		}
>> -	}
>> -
>> -	if (pdata->flags & DW_MIPI_NEEDS_GRF_CLK) {
>> -		dsi->grf_clk = devm_clk_get(dev, "grf");
>> -		if (IS_ERR(dsi->grf_clk)) {
>> -			ret = PTR_ERR(dsi->grf_clk);
>> -			DRM_DEV_ERROR(dev, "Unable to get grf_clk: %d\n", ret);
>> -			return ret;
>> -		}
>> -	}
>> -
>> -	ret = clk_prepare_enable(dsi->pllref_clk);
>> -	if (ret) {
>> -		DRM_DEV_ERROR(dev, "Failed to enable pllref_clk\n");
>> -		return ret;
>> -	}
>> -
>> -	ret = dw_mipi_dsi_register(drm, dsi);
>> -	if (ret) {
>> -		DRM_DEV_ERROR(dev, "Failed to register mipi_dsi: %d\n", ret);
>> -		goto err_pllref;
>> -	}
>> -
>> -	pm_runtime_enable(dev);
>> -
>> -	dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
>> -	dsi->dsi_host.dev = dev;
>> -	ret = mipi_dsi_host_register(&dsi->dsi_host);
>> -	if (ret) {
>> -		DRM_DEV_ERROR(dev, "Failed to register MIPI host: %d\n", ret);
>> -		goto err_cleanup;
>> -	}
>> -
>> -	if (!dsi->panel) {
>> -		ret = -EPROBE_DEFER;
>> -		goto err_mipi_dsi_host;
>> -	}
>> -
>> -	dev_set_drvdata(dev, dsi);
>> -	return 0;
>> -
>> -err_mipi_dsi_host:
>> -	mipi_dsi_host_unregister(&dsi->dsi_host);
>> -err_cleanup:
>> -	drm_encoder_cleanup(&dsi->encoder);
>> -	drm_connector_cleanup(&dsi->connector);
>> -err_pllref:
>> -	clk_disable_unprepare(dsi->pllref_clk);
>> -	return ret;
>> -}
>> -
>> -static void dw_mipi_dsi_unbind(struct device *dev, struct device *master,
>> -			       void *data)
>> -{
>> -	struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
>> -
>> -	mipi_dsi_host_unregister(&dsi->dsi_host);
>> -	pm_runtime_disable(dev);
>> -	clk_disable_unprepare(dsi->pllref_clk);
>> -}
>> -
>> -static const struct component_ops dw_mipi_dsi_ops = {
>> -	.bind	= dw_mipi_dsi_bind,
>> -	.unbind	= dw_mipi_dsi_unbind,
>> -};
>> -
>> -static int dw_mipi_dsi_probe(struct platform_device *pdev)
>> -{
>> -	return component_add(&pdev->dev, &dw_mipi_dsi_ops);
>> -}
>> -
>> -static int dw_mipi_dsi_remove(struct platform_device *pdev)
>> -{
>> -	component_del(&pdev->dev, &dw_mipi_dsi_ops);
>> -	return 0;
>> -}
>> -
>> -struct platform_driver dw_mipi_dsi_driver = {
>> -	.probe		= dw_mipi_dsi_probe,
>> -	.remove		= dw_mipi_dsi_remove,
>> -	.driver		= {
>> -		.of_match_table = dw_mipi_dsi_dt_ids,
>> -		.name	= DRIVER_NAME,
>> -	},
>> -};
>> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
>> new file mode 100644
>> index 0000000..c682ed2
>> --- /dev/null
>> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
>> @@ -0,0 +1,764 @@
>> +/*
>> + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
>> + * Author:
>> + *      Chris Zhong <zyw@rock-chips.com>
>> + *      Nickey Yang <nickey.yang@rock-chips.com>
>> + *
>> + * This software is licensed under the terms of the GNU General Public
>> + * License version 2, as published by the Free Software Foundation, and
>> + * may be copied, distributed, and modified under those terms.
>> + *
>> + * This program is distributed in the hope that it will be useful,
>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>> + *
>> + * License terms:  GNU General Public License (GPL), version 2
>> + */
>> +
>> +#include <linux/clk.h>
>> +#include <linux/iopoll.h>
>> +#include <linux/math64.h>
>> +#include <linux/module.h>
>> +#include <linux/of_device.h>
>> +#include <drm/drmP.h>
>> +#include <drm/drm_mipi_dsi.h>
>> +#include <drm/bridge/dw_mipi_dsi.h>
>> +#include <video/mipi_display.h>
>> +#include <linux/regmap.h>
>> +#include <drm/drm_of.h>
>> +#include <linux/mfd/syscon.h>
>> +
>> +#include "rockchip_drm_drv.h"
>> +#include "rockchip_drm_vop.h"
>> +
>> +#define DSI_PHY_TST_CTRL0		0xb4
>> +#define PHY_TESTCLK			BIT(1)
>> +#define PHY_UNTESTCLK			0
>> +#define PHY_TESTCLR			BIT(0)
>> +#define PHY_UNTESTCLR			0
>> +
>> +#define DSI_PHY_TST_CTRL1		0xb8
>> +#define PHY_TESTEN			BIT(16)
>> +#define PHY_UNTESTEN			0
>> +#define PHY_TESTDOUT(n)			(((n) & 0xff) << 8)
>> +#define PHY_TESTDIN(n)			(((n) & 0xff) << 0)
>> +
>> +#define BYPASS_VCO_RANGE	BIT(7)
>> +#define VCO_RANGE_CON_SEL(val)	(((val) & 0x7) << 3)
>> +#define VCO_IN_CAP_CON_DEFAULT	(0x0 << 1)
>> +#define VCO_IN_CAP_CON_LOW	(0x1 << 1)
>> +#define VCO_IN_CAP_CON_HIGH	(0x2 << 1)
>> +#define REF_BIAS_CUR_SEL	BIT(0)
>> +
>> +#define CP_CURRENT_3UA	0x1
>> +#define CP_CURRENT_4_5UA	0x2
>> +#define CP_CURRENT_7_5UA	0x6
>> +#define CP_CURRENT_6UA	0x9
>> +#define CP_CURRENT_12UA	0xb
>> +#define CP_CURRENT_SEL(val)	((val) & 0xf)
>> +#define CP_PROGRAM_EN		BIT(7)
>> +
>> +#define LPF_RESISTORS_15_5KOHM	0x1
>> +#define LPF_RESISTORS_13KOHM	0x2
>> +#define LPF_RESISTORS_11_5KOHM	0x4
>> +#define LPF_RESISTORS_10_5KOHM	0x8
>> +#define LPF_RESISTORS_8KOHM	0x10
>> +#define LPF_PROGRAM_EN		BIT(6)
>> +#define LPF_RESISTORS_SEL(val)	((val) & 0x3f)
>> +
>> +#define HSFREQRANGE_SEL(val)	(((val) & 0x3f) << 1)
>> +
>> +#define INPUT_DIVIDER(val)	(((val) - 1) & 0x7f)
>> +#define LOW_PROGRAM_EN		0
>> +#define HIGH_PROGRAM_EN		BIT(7)
>> +#define LOOP_DIV_LOW_SEL(val)	(((val) - 1) & 0x1f)
>> +#define LOOP_DIV_HIGH_SEL(val)	((((val) - 1) >> 5) & 0xf)
>> +#define PLL_LOOP_DIV_EN		BIT(5)
>> +#define PLL_INPUT_DIV_EN	BIT(4)
>> +
>> +#define POWER_CONTROL		BIT(6)
>> +#define INTERNAL_REG_CURRENT	BIT(3)
>> +#define BIAS_BLOCK_ON		BIT(2)
>> +#define BANDGAP_ON		BIT(0)
>> +
>> +#define TER_RESISTOR_HIGH	BIT(7)
>> +#define	TER_RESISTOR_LOW	0
>> +#define LEVEL_SHIFTERS_ON	BIT(6)
>> +#define TER_CAL_DONE		BIT(5)
>> +#define SETRD_MAX		(0x7 << 2)
>> +#define POWER_MANAGE		BIT(1)
>> +#define TER_RESISTORS_ON	BIT(0)
>> +
>> +#define BIASEXTR_SEL(val)	((val) & 0x7)
>> +#define BANDGAP_SEL(val)	((val) & 0x7)
>> +#define TLP_PROGRAM_EN		BIT(7)
>> +#define THS_PRE_PROGRAM_EN	BIT(7)
>> +#define THS_ZERO_PROGRAM_EN	BIT(6)
>> +
>> +#define PLL_BIAS_CUR_SEL_CAP_VCO_CONTROL	0x10
>> +#define PLL_CP_CONTROL_PLL_LOCK_BYPASS	0x11
>> +#define PLL_LPF_AND_CP_CONTROL	0x12
>> +#define PLL_INPUT_DIVIDER_RATIO	0x17
>> +#define PLL_LOOP_DIVIDER_RATIO	0x18
>> +#define PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL	0x19
>> +#define BANDGAP_AND_BIAS_CONTROL	0x20
>> +#define TERMINATION_RESISTER_CONTROL	0x21
>> +#define AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY	0x22
>> +#define HS_RX_CONTROL_OF_LANE_0	0x44
>> +#define HS_TX_CLOCK_LANE_REQUEST_STATE_TIME_CONTROL	0x60
>> +#define HS_TX_CLOCK_LANE_PREPARE_STATE_TIME_CONTROL	0x61
>> +#define HS_TX_CLOCK_LANE_HS_ZERO_STATE_TIME_CONTROL	0x62
>> +#define HS_TX_CLOCK_LANE_TRAIL_STATE_TIME_CONTROL	0x63
>> +#define HS_TX_CLOCK_LANE_EXIT_STATE_TIME_CONTROL	0x64
>> +#define HS_TX_CLOCK_LANE_POST_TIME_CONTROL	0x65
>> +#define HS_TX_DATA_LANE_REQUEST_STATE_TIME_CONTROL	0x70
>> +#define HS_TX_DATA_LANE_PREPARE_STATE_TIME_CONTROL	0x71
>> +#define HS_TX_DATA_LANE_HS_ZERO_STATE_TIME_CONTROL	0x72
>> +#define HS_TX_DATA_LANE_TRAIL_STATE_TIME_CONTROL	0x73
>> +#define HS_TX_DATA_LANE_EXIT_STATE_TIME_CONTROL	0x74
>> +
>> +#define DW_MIPI_NEEDS_PHY_CFG_CLK	BIT(0)
>> +#define DW_MIPI_NEEDS_GRF_CLK		BIT(1)
>> +
>> +#define RK3288_GRF_SOC_CON6		0x025c
>> +#define RK3288_DSI0_SEL_VOP_LIT		BIT(6)
>> +#define RK3288_DSI1_SEL_VOP_LIT		BIT(9)
>> +
>> +#define RK3399_GRF_SOC_CON20		0x6250
>> +#define RK3399_DSI0_SEL_VOP_LIT		BIT(0)
>> +#define RK3399_DSI1_SEL_VOP_LIT		BIT(4)
>> +
>> +/* disable turnrequest, turndisable, forcetxstopmode, forcerxmode */
>> +#define RK3399_GRF_SOC_CON22		0x6258
>> +#define RK3399_GRF_DSI_MODE		0xffff0000
>> +
>> +#define to_dsi(nm)	container_of(nm, struct dw_mipi_dsi_rockchip, nm)
>> +
>> +enum {
>> +	BANDGAP_97_07,
>> +	BANDGAP_98_05,
>> +	BANDGAP_99_02,
>> +	BANDGAP_100_00,
>> +	BANDGAP_93_17,
>> +	BANDGAP_94_15,
>> +	BANDGAP_95_12,
>> +	BANDGAP_96_10,
>> +};
>> +
>> +enum {
>> +	BIASEXTR_87_1,
>> +	BIASEXTR_91_5,
>> +	BIASEXTR_95_9,
>> +	BIASEXTR_100,
>> +	BIASEXTR_105_94,
>> +	BIASEXTR_111_88,
>> +	BIASEXTR_118_8,
>> +	BIASEXTR_127_7,
>> +};
>> +
>> +struct rockchip_dw_dsi_chip_data {
>> +	u32 dsi0_en_bit;
>> +	u32 dsi1_en_bit;
>> +	u32 grf_switch_reg;
>> +	u32 grf_dsi0_mode;
>> +	u32 grf_dsi0_mode_reg;
>> +	unsigned int flags;
>> +	unsigned int max_data_lanes;
>> +};
>> +
>> +struct dw_mipi_dsi_rockchip {
>> +	struct device *dev;
>> +	struct drm_encoder encoder;
>> +	void __iomem *base;
>> +
>> +	struct regmap *grf_regmap;
>> +	struct clk *pllref_clk;
>> +	struct clk *grf_clk;
>> +	struct clk *phy_cfg_clk;
>> +
>> +	unsigned int lane_mbps; /* per lane */
>> +	u16 input_div;
>> +	u16 feedback_div;
>> +	u32 format;
>> +
>> +	struct dw_mipi_dsi *dmd;
>> +	const struct rockchip_dw_dsi_chip_data *cdata;
>> +	struct dw_mipi_dsi_plat_data pdata;
>> +};
>> +
>> +struct dphy_pll_parameter_map {
>> +	unsigned int max_mbps;
>> +	u8 hsfreqrange;
>> +	u8 icpctrl;
>> +	u8 lpfctrl;
>> +};
>> +
>> +/* The table is based on 27MHz DPHY pll reference clock. */
>> +static const struct dphy_pll_parameter_map dppa_map[] = {
>> +	{  89, 0x00, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
>> +	{  99, 0x10, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
>> +	{ 109, 0x20, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
>> +	{ 129, 0x01, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
>> +	{ 139, 0x11, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
>> +	{ 149, 0x21, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
>> +	{ 169, 0x02, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
>> +	{ 179, 0x12, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
>> +	{ 199, 0x22, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
>> +	{ 219, 0x03, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
>> +	{ 239, 0x13, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
>> +	{ 249, 0x23, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
>> +	{ 269, 0x04, CP_CURRENT_6UA, LPF_RESISTORS_11_5KOHM },
>> +	{ 299, 0x14, CP_CURRENT_6UA, LPF_RESISTORS_11_5KOHM },
>> +	{ 329, 0x05, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
>> +	{ 359, 0x15, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
>> +	{ 399, 0x25, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
>> +	{ 449, 0x06, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
>> +	{ 499, 0x16, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
>> +	{ 549, 0x07, CP_CURRENT_7_5UA, LPF_RESISTORS_10_5KOHM },
>> +	{ 599, 0x17, CP_CURRENT_7_5UA, LPF_RESISTORS_10_5KOHM },
>> +	{ 649, 0x08, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
>> +	{ 699, 0x18, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
>> +	{ 749, 0x09, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
>> +	{ 799, 0x19, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
>> +	{ 849, 0x29, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
>> +	{ 899, 0x39, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
>> +	{ 949, 0x0a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
>> +	{ 999, 0x1a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
>> +	{1049, 0x2a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
>> +	{1099, 0x3a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
>> +	{1149, 0x0b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
>> +	{1199, 0x1b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
>> +	{1249, 0x2b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
>> +	{1299, 0x3b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
>> +	{1349, 0x0c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
>> +	{1399, 0x1c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
>> +	{1449, 0x2c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
>> +	{1500, 0x3c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM }
>> +};
>> +
>> +static int max_mbps_to_parameter(unsigned int max_mbps)
>> +{
>> +	int i;
>> +
>> +	for (i = 0; i < ARRAY_SIZE(dppa_map); i++)
>> +		if (dppa_map[i].max_mbps >= max_mbps)
>> +			return i;
>> +
>> +	return -EINVAL;
>> +}
>> +
>> +static inline void dsi_write(struct dw_mipi_dsi_rockchip *dsi, u32 reg, u32 val)
>> +{
>> +	writel(val, dsi->base + reg);
>> +}
>> +
>> +static inline u32 dsi_read(struct dw_mipi_dsi_rockchip *dsi, u32 reg)
>> +{
>> +	return readl(dsi->base + reg);
>> +}
>> +
>> +static inline void dsi_set(struct dw_mipi_dsi_rockchip *dsi, u32 reg, u32 mask)
>> +{
>> +	dsi_write(dsi, reg, dsi_read(dsi, reg) | mask);
>> +}
>> +
>> +static inline void dsi_update_bits(struct dw_mipi_dsi_rockchip *dsi, u32 reg,
>> +				   u32 mask, u32 val)
>> +{
>> +	dsi_write(dsi, reg, (dsi_read(dsi, reg) & ~mask) | val);
>> +}
>> +
>> +static void dw_mipi_dsi_phy_write(struct dw_mipi_dsi_rockchip *dsi,
>> +				  u8 test_code,
>> +				  u8 test_data)
>> +{
>> +	/*
>> +	 * With the falling edge on TESTCLK, the TESTDIN[7:0] signal content
>> +	 * is latched internally as the current test code. Test data is
>> +	 * programmed internally by rising edge on TESTCLK.
>> +	 */
>> +	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
>> +
>> +	dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_TESTEN | PHY_TESTDOUT(0) |
>> +					  PHY_TESTDIN(test_code));
>> +
>> +	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLK | PHY_UNTESTCLR);
>> +
>> +	dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_UNTESTEN | PHY_TESTDOUT(0) |
>> +					  PHY_TESTDIN(test_data));
>> +
>> +	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
>> +}
>> +
>> +/**
>> + * ns2bc - Nanoseconds to byte clock cycles
>> + */
>> +static inline unsigned int ns2bc(struct dw_mipi_dsi_rockchip *dsi, int ns)
>> +{
>> +	return DIV_ROUND_UP(ns * dsi->lane_mbps / 8, 1000);
>> +}
>> +
>> +/**
>> + * ns2ui - Nanoseconds to UI time periods
>> + */
>> +static inline unsigned int ns2ui(struct dw_mipi_dsi_rockchip *dsi, int ns)
>> +{
>> +	return DIV_ROUND_UP(ns * dsi->lane_mbps, 1000);
>> +}
>> +
>> +static int dw_mipi_dsi_phy_init(void *priv_data)
>> +{
>> +	struct dw_mipi_dsi_rockchip *dsi = priv_data;
>> +	int ret, i, vco;
>> +
>> +	vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;
> Please add a clarifying comment as requested by Sean on
> https://chromium-review.googlesource.com/#/c/chromiumos/third_party/kernel/+/780120/
Done in v4 version: https://patchwork.kernel.org/patch/10086125/
>> +	i = max_mbps_to_parameter(dsi->lane_mbps);
>> +	if (i < 0) {
>> +		DRM_DEV_ERROR(dsi->dev,
>> +			      "failed to get parameter for %dmbps clock\n",
>> +			      dsi->lane_mbps);
>> +		return i;
>> +	}
>> +
>> +	ret = clk_prepare_enable(dsi->phy_cfg_clk);
>> +	if (ret) {
>> +		DRM_DEV_ERROR(dsi->dev, "Failed to enable phy_cfg_clk\n");
>> +		return ret;
>> +	}
>> +
>> +	dw_mipi_dsi_phy_write(dsi, PLL_BIAS_CUR_SEL_CAP_VCO_CONTROL,
>> +			      BYPASS_VCO_RANGE |
>> +			      VCO_RANGE_CON_SEL(vco) |
>> +			      VCO_IN_CAP_CON_LOW |
>> +			      REF_BIAS_CUR_SEL);
>> +
>> +	dw_mipi_dsi_phy_write(dsi, PLL_CP_CONTROL_PLL_LOCK_BYPASS,
>> +			      CP_CURRENT_SEL(dppa_map[i].icpctrl));
>> +	dw_mipi_dsi_phy_write(dsi, PLL_LPF_AND_CP_CONTROL,
>> +			      CP_PROGRAM_EN | LPF_PROGRAM_EN |
>> +			      LPF_RESISTORS_SEL(dppa_map[i].lpfctrl));
>> +
>> +	dw_mipi_dsi_phy_write(dsi, HS_RX_CONTROL_OF_LANE_0,
>> +			      HSFREQRANGE_SEL(dppa_map[i].hsfreqrange));
>> +
>> +	dw_mipi_dsi_phy_write(dsi, PLL_INPUT_DIVIDER_RATIO,
>> +			      INPUT_DIVIDER(dsi->input_div));
>> +	dw_mipi_dsi_phy_write(dsi, PLL_LOOP_DIVIDER_RATIO,
>> +			      LOOP_DIV_LOW_SEL(dsi->feedback_div) |
>> +			      LOW_PROGRAM_EN);
>> +	/*
>> +	 * We need set PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL immediately
>> +	 * to make the configured LSB effective according to IP simulation
>> +	 * and lab test results.
>> +	 * Only in this way can we get correct mipi phy pll frequency.
>> +	 */
>> +	dw_mipi_dsi_phy_write(dsi, PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL,
>> +			      PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
>> +	dw_mipi_dsi_phy_write(dsi, PLL_LOOP_DIVIDER_RATIO,
>> +			      LOOP_DIV_HIGH_SEL(dsi->feedback_div) |
>> +			      HIGH_PROGRAM_EN);
>> +	dw_mipi_dsi_phy_write(dsi, PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL,
>> +			      PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
>> +
>> +	dw_mipi_dsi_phy_write(dsi, AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY,
>> +			      LOW_PROGRAM_EN | BIASEXTR_SEL(BIASEXTR_127_7));
>> +	dw_mipi_dsi_phy_write(dsi, AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY,
>> +			      HIGH_PROGRAM_EN | BANDGAP_SEL(BANDGAP_96_10));
>> +
>> +	dw_mipi_dsi_phy_write(dsi, BANDGAP_AND_BIAS_CONTROL,
>> +			      POWER_CONTROL | INTERNAL_REG_CURRENT |
>> +			      BIAS_BLOCK_ON | BANDGAP_ON);
>> +
>> +	dw_mipi_dsi_phy_write(dsi, TERMINATION_RESISTER_CONTROL,
>> +			      TER_RESISTOR_LOW | TER_CAL_DONE |
>> +			      SETRD_MAX | TER_RESISTORS_ON);
>> +	dw_mipi_dsi_phy_write(dsi, TERMINATION_RESISTER_CONTROL,
>> +			      TER_RESISTOR_HIGH | LEVEL_SHIFTERS_ON |
>> +			      SETRD_MAX | POWER_MANAGE |
>> +			      TER_RESISTORS_ON);
>> +
>> +	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_REQUEST_STATE_TIME_CONTROL,
>> +			      TLP_PROGRAM_EN | ns2bc(dsi, 500));
>> +	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_PREPARE_STATE_TIME_CONTROL,
>> +			      THS_PRE_PROGRAM_EN | ns2ui(dsi, 40));
>> +	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_HS_ZERO_STATE_TIME_CONTROL,
>> +			      THS_ZERO_PROGRAM_EN | ns2bc(dsi, 300));
>> +	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_TRAIL_STATE_TIME_CONTROL,
>> +			      THS_PRE_PROGRAM_EN | ns2ui(dsi, 100));
>> +	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_EXIT_STATE_TIME_CONTROL,
>> +			      BIT(5) | ns2bc(dsi, 100));
>> +	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_POST_TIME_CONTROL,
>> +			      BIT(5) | (ns2bc(dsi, 60) + 7));
>> +
>> +	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_REQUEST_STATE_TIME_CONTROL,
>> +			      TLP_PROGRAM_EN | ns2bc(dsi, 500));
>> +	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_PREPARE_STATE_TIME_CONTROL,
>> +			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 50) + 20));
>> +	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_HS_ZERO_STATE_TIME_CONTROL,
>> +			      THS_ZERO_PROGRAM_EN | (ns2bc(dsi, 140) + 2));
>> +	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_TRAIL_STATE_TIME_CONTROL,
>> +			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 60) + 8));
>> +	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_EXIT_STATE_TIME_CONTROL,
>> +			      BIT(5) | ns2bc(dsi, 100));
>> +
>> +	clk_disable_unprepare(dsi->phy_cfg_clk);
>> +
>> +	return ret;
>> +}
>> +
>> +static int
>> +dw_mipi_dsi_get_lane_mbps(void *priv_data, struct drm_display_mode *mode,
>> +			  unsigned long mode_flags, u32 lanes, u32 format,
>> +			  unsigned int *lane_mbps)
>> +{
>> +	struct dw_mipi_dsi_rockchip *dsi = priv_data;
>> +	int bpp;
>> +	unsigned long mpclk, tmp;
>> +	unsigned int target_mbps = 1000;
>> +	unsigned int max_mbps = dppa_map[ARRAY_SIZE(dppa_map) - 1].max_mbps;
>> +	unsigned long best_freq = 0;
>> +	unsigned long fvco_min, fvco_max, fin, fout;
>> +	unsigned int min_prediv, max_prediv;
>> +	unsigned int _prediv, uninitialized_var(best_prediv);
>> +	unsigned long _fbdiv, uninitialized_var(best_fbdiv);
>> +	unsigned long min_delta = ULONG_MAX;
>> +
>> +	dsi->format = format;
>> +	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
>> +	if (bpp < 0) {
>> +		DRM_DEV_ERROR(dsi->dev,
>> +			      "failed to get bpp for pixel format %d\n",
>> +			      dsi->format);
>> +		return bpp;
>> +	}
>> +
>> +	mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC);
>> +	if (mpclk) {
>> +		/* take 1 / 0.8, since mbps must big than bandwidth of RGB */
>> +		tmp = mpclk * (bpp / lanes) * 10 / 8;
>> +		if (tmp < max_mbps)
>> +			target_mbps = tmp;
>> +		else
>> +			DRM_DEV_ERROR(dsi->dev,
>> +				      "DPHY clock frequency is out of range\n");
>> +	}
>> +
>> +	fin = clk_get_rate(dsi->pllref_clk);
>> +	fout = target_mbps * USEC_PER_SEC;
>> +
>> +	/* constraint: 5Mhz <= Fref / N <= 40MHz */
>> +	min_prediv = DIV_ROUND_UP(fin, 40 * USEC_PER_SEC);
>> +	max_prediv = fin / (5 * USEC_PER_SEC);
>> +
>> +	/* constraint: 80MHz <= Fvco <= 1500Mhz */
>> +	fvco_min = 80 * USEC_PER_SEC;
>> +	fvco_max = 1500 * USEC_PER_SEC;
>> +
>> +	for (_prediv = min_prediv; _prediv <= max_prediv; _prediv++) {
>> +		u64 tmp;
>> +		u32 delta;
>> +		/* Fvco = Fref * M / N */
>> +		tmp = (u64)fout * _prediv;
>> +		do_div(tmp, fin);
>> +		_fbdiv = tmp;
>> +		/*
>> +		 * Due to the use of a "by 2 pre-scaler," the range of the
>> +		 * feedback multiplication value M is limited to even division
>> +		 * numbers, and m must be greater than 6, less than 512.
>> +		 */
> It seems this should be "not bigger than 512" or something similar.
Done
>
>> +		if (_fbdiv < 6 || _fbdiv > 512)
>> +			continue;
>> +
>> +		_fbdiv += _fbdiv % 2;
>> +
>> +		tmp = (u64)_fbdiv * fin;
>> +		do_div(tmp, _prediv);
> Should we bail out early if min_prediv == 0 due to some bogus
> configuration of pllref_clk?
We get min_prediv by DIV_ROUND_UP(fin, 40M)
Fin will be 24Mhz or 27Mhz only as phy document said.
min_prediv will be 1.So i think add
  /* if (min_prediv == 0) return ... */seems unnecessary.
>> +		if (tmp < fvco_min || tmp > fvco_max)
>> +			continue;
>> +
>> +		delta = abs(fout - tmp);
>> +		if (delta < min_delta) {
>> +			best_prediv = _prediv;
>> +			best_fbdiv = _fbdiv;
>> +			min_delta = delta;
>> +			best_freq = tmp;
>> +		}
>> +	}
>> +
>> +	if (best_freq) {
>> +		dsi->lane_mbps = DIV_ROUND_UP(best_freq, USEC_PER_SEC);
>> +		*lane_mbps = dsi->lane_mbps;
>> +		dsi->input_div = best_prediv;
>> +		dsi->feedback_div = best_fbdiv;
>> +	} else {
>> +		DRM_DEV_ERROR(dsi->dev, "Can not find best_freq for DPHY\n");
> return -1;
>
Done by return -EINVAL; as Brian and Sean suggested.

Thanks
Nickey.
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>> +static const struct dw_mipi_dsi_phy_ops dw_mipi_dsi_rockchip_phy_ops = {
>> +	.init = dw_mipi_dsi_phy_init,
>> +	.get_lane_mbps = dw_mipi_dsi_get_lane_mbps,
>> +};
>> +
>> +static void dw_mipi_dsi_encoder_mode_set(struct drm_encoder *encoder,
>> +					 struct drm_display_mode *mode,
>> +					 struct drm_display_mode *adjusted)
>> +{
>> +	struct dw_mipi_dsi_rockchip *dsi = to_dsi(encoder);
>> +	const struct rockchip_dw_dsi_chip_data *cdata = dsi->cdata;
>> +	int val, ret, mux;
>> +
>> +	mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node,
>> +						&dsi->encoder);
>> +	if (mux < 0)
>> +		return;
>> +	/*
>> +	 * For the RK3399, the clk of grf must be enabled before writing grf
>> +	 * register. And for RK3288 or other soc, this grf_clk must be NULL,
>> +	 * the clk_prepare_enable return true directly.
>> +	 */
>> +	ret = clk_prepare_enable(dsi->grf_clk);
>> +	if (ret) {
>> +		DRM_DEV_ERROR(dsi->dev, "Failed to enable grf_clk: %d\n", ret);
>> +		return;
>> +	}
>> +
>> +	val = cdata->dsi0_en_bit << 16;
>> +	if (mux)
>> +		val |= cdata->dsi0_en_bit;
>> +	regmap_write(dsi->grf_regmap, cdata->grf_switch_reg, val);
>> +
>> +	if (cdata->grf_dsi0_mode_reg)
>> +		regmap_write(dsi->grf_regmap, cdata->grf_dsi0_mode_reg,
>> +			     cdata->grf_dsi0_mode);
>> +
>> +	clk_disable_unprepare(dsi->grf_clk);
>> +}
>> +
>> +static int
>> +dw_mipi_dsi_encoder_atomic_check(struct drm_encoder *encoder,
>> +				 struct drm_crtc_state *crtc_state,
>> +				 struct drm_connector_state *conn_state)
>> +{
>> +	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
>> +	struct dw_mipi_dsi_rockchip *dsi = to_dsi(encoder);
>> +
>> +	switch (dsi->format) {
>> +	case MIPI_DSI_FMT_RGB888:
>> +		s->output_mode = ROCKCHIP_OUT_MODE_P888;
>> +		break;
>> +	case MIPI_DSI_FMT_RGB666:
>> +		s->output_mode = ROCKCHIP_OUT_MODE_P666;
>> +		break;
>> +	case MIPI_DSI_FMT_RGB565:
>> +		s->output_mode = ROCKCHIP_OUT_MODE_P565;
>> +		break;
>> +	default:
>> +		WARN_ON(1);
>> +		return -EINVAL;
>> +	}
>> +
>> +	s->output_type = DRM_MODE_CONNECTOR_DSI;
>> +
>> +	return 0;
>> +}
>> +
>> +static const struct drm_encoder_helper_funcs
>> +dw_mipi_dsi_encoder_helper_funcs = {
>> +	.mode_set = dw_mipi_dsi_encoder_mode_set,
>> +	.atomic_check = dw_mipi_dsi_encoder_atomic_check,
>> +};
>> +
>> +static const struct drm_encoder_funcs dw_mipi_dsi_encoder_funcs = {
>> +	.destroy = drm_encoder_cleanup,
>> +};
>> +
>> +static int rockchip_dsi_drm_create_encoder(struct dw_mipi_dsi_rockchip *dsi,
>> +					   struct drm_device *drm_dev)
>> +{
>> +	struct drm_encoder *encoder = &dsi->encoder;
>> +	int ret;
>> +
>> +	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
>> +							     dsi->dev->of_node);
>> +
>> +	ret = drm_encoder_init(drm_dev, encoder, &dw_mipi_dsi_encoder_funcs,
>> +			       DRM_MODE_ENCODER_DSI, NULL);
>> +	if (ret) {
>> +		DRM_ERROR("Failed to initialize encoder with drm\n");
>> +		return ret;
>> +	}
>> +
>> +	drm_encoder_helper_add(encoder, &dw_mipi_dsi_encoder_helper_funcs);
>> +
>> +	return 0;
>> +}
>> +
>> +static int dw_mipi_dsi_rockchip_bind(struct device *dev,
>> +				     struct device *master,
>> +				     void *data)
>> +{
>> +	struct dw_mipi_dsi_rockchip *dsi = dev_get_drvdata(dev);
>> +	struct platform_device *pdev = to_platform_device(dev);
>> +	struct drm_device *drm_dev = data;
>> +	int ret;
>> +
>> +	dsi->pdata.base = dsi->base;
>> +	dsi->pdata.max_data_lanes = dsi->cdata->max_data_lanes;
>> +	dsi->pdata.phy_ops = &dw_mipi_dsi_rockchip_phy_ops;
>> +	dsi->pdata.priv_data = dsi;
>> +
>> +	ret = clk_prepare_enable(dsi->pllref_clk);
>> +	if (ret) {
>> +		DRM_DEV_ERROR(dev,
>> +			      "%s: Failed to enable pllref_clk\n", __func__);
>> +		return ret;
>> +	}
>> +
>> +	ret = rockchip_dsi_drm_create_encoder(dsi, drm_dev);
>> +	if (ret) {
>> +		DRM_ERROR("Failed to create drm encoder\n");
>> +		goto err_pllref;
>> +	}
>> +
>> +	dsi->dmd = dw_mipi_dsi_bind(pdev, &dsi->encoder, &dsi->pdata);
>> +	if (IS_ERR(dsi->dmd)) {
>> +		DRM_ERROR("Failed to bind\n");
>> +		ret = PTR_ERR(dsi->dmd);
>> +		goto err_pllref;
>> +	}
>> +	return 0;
>> +
>> +err_pllref:
>> +	clk_disable_unprepare(dsi->pllref_clk);
>> +	return ret;
>> +}
>> +
>> +static void dw_mipi_dsi_rockchip_unbind(struct device *dev,
>> +					struct device *master,
>> +					void *data)
>> +{
>> +	struct dw_mipi_dsi_rockchip *dsi = dev_get_drvdata(dev);
>> +
>> +	dw_mipi_dsi_unbind(dsi->dmd);
>> +	clk_disable_unprepare(dsi->pllref_clk);
>> +}
>> +
>> +static const struct component_ops dw_mipi_dsi_rockchip_ops = {
>> +	.bind	= dw_mipi_dsi_rockchip_bind,
>> +	.unbind	= dw_mipi_dsi_rockchip_unbind,
>> +};
>> +
>> +static int dw_mipi_dsi_rockchip_probe(struct platform_device *pdev)
>> +{
>> +	struct device *dev = &pdev->dev;
>> +	struct device_node *np = dev->of_node;
>> +	struct dw_mipi_dsi_rockchip *dsi;
>> +	struct resource *res;
>> +	const struct rockchip_dw_dsi_chip_data *cdata =
>> +				of_device_get_match_data(dev);
>> +	int ret;
>> +
>> +	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
>> +	if (!dsi)
>> +		return -ENOMEM;
>> +
>> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> +	if (!res) {
>> +		DRM_ERROR("Unable to get resource\n");
>> +		return -ENODEV;
>> +	}
>> +
>> +	dsi->base = devm_ioremap_resource(dev, res);
>> +	if (IS_ERR(dsi->base)) {
>> +		DRM_ERROR("Unable to get dsi registers\n");
>> +		return PTR_ERR(dsi->base);
>> +	}
>> +
>> +	dsi->pllref_clk = devm_clk_get(dev, "ref");
>> +	if (IS_ERR(dsi->pllref_clk)) {
>> +		ret = PTR_ERR(dsi->pllref_clk);
>> +		DRM_DEV_ERROR(dev,
>> +			      "Unable to get pll reference clock: %d\n", ret);
>> +		return ret;
>> +	}
>> +
>> +	if (cdata->flags & DW_MIPI_NEEDS_PHY_CFG_CLK) {
>> +		dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
>> +		if (IS_ERR(dsi->phy_cfg_clk)) {
>> +			ret = PTR_ERR(dsi->phy_cfg_clk);
>> +			DRM_DEV_ERROR(dev,
>> +				      "Unable to get phy_cfg_clk: %d\n", ret);
>> +			return ret;
>> +		}
>> +	}
>> +
>> +	if (cdata->flags & DW_MIPI_NEEDS_GRF_CLK) {
>> +		dsi->grf_clk = devm_clk_get(dev, "grf");
>> +		if (IS_ERR(dsi->grf_clk)) {
>> +			ret = PTR_ERR(dsi->grf_clk);
>> +			DRM_DEV_ERROR(dev, "Unable to get grf_clk: %d\n", ret);
>> +			return ret;
>> +		}
>> +	}
>> +
>> +	dsi->grf_regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
>> +	if (IS_ERR(dsi->grf_regmap)) {
>> +		DRM_DEV_ERROR(dsi->dev, "Unable to get rockchip,grf\n");
>> +		return PTR_ERR(dsi->grf_regmap);
>> +	}
>> +
>> +	dsi->cdata = cdata;
>> +	dsi->dev = dev;
>> +	dev_set_drvdata(dev, dsi);
>> +
>> +	return component_add(&pdev->dev, &dw_mipi_dsi_rockchip_ops);
>> +}
>> +
>> +static int dw_mipi_dsi_rockchip_remove(struct platform_device *pdev)
>> +{
>> +	component_del(&pdev->dev, &dw_mipi_dsi_rockchip_ops);
>> +
>> +	return 0;
>> +}
>> +
>> +static struct rockchip_dw_dsi_chip_data rk3288_chip_data = {
>> +	.dsi0_en_bit = RK3288_DSI0_SEL_VOP_LIT,
>> +	.dsi1_en_bit = RK3288_DSI1_SEL_VOP_LIT,
>> +	.grf_switch_reg = RK3288_GRF_SOC_CON6,
>> +	.max_data_lanes = 4,
>> +};
>> +
>> +static struct rockchip_dw_dsi_chip_data rk3399_chip_data = {
>> +	.dsi0_en_bit = RK3399_DSI0_SEL_VOP_LIT,
>> +	.dsi1_en_bit = RK3399_DSI1_SEL_VOP_LIT,
>> +	.grf_switch_reg = RK3399_GRF_SOC_CON20,
>> +	.grf_dsi0_mode = RK3399_GRF_DSI_MODE,
>> +	.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
>> +	.flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK,
>> +	.max_data_lanes = 4,
>> +};
>> +
>> +static const struct of_device_id dw_mipi_dsi_rockchip_dt_ids[] = {
>> +	{
>> +	 .compatible = "rockchip,rk3288-mipi-dsi",
>> +	 .data = &rk3288_chip_data,
>> +	}, {
>> +	 .compatible = "rockchip,rk3399-mipi-dsi",
>> +	 .data = &rk3399_chip_data,
>> +	},
>> +	{ /* sentinel */ }
>> +};
>> +MODULE_DEVICE_TABLE(of, dw_mipi_dsi_rockchip_dt_ids);
>> +
>> +struct platform_driver dw_mipi_dsi_rockchip_driver = {
>> +	.probe		= dw_mipi_dsi_rockchip_probe,
>> +	.remove		= dw_mipi_dsi_rockchip_remove,
>> +	.driver		= {
>> +		.of_match_table = dw_mipi_dsi_rockchip_dt_ids,
>> +		.name	= "dw-mipi-dsi-rockchip",
>> +	},
>> +};
>> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
>> index 76d63de..d40cc39 100644
>> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
>> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
>> @@ -462,7 +462,7 @@ static int __init rockchip_drm_init(void)
>>   	ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
>>   	ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver,
>>   				CONFIG_ROCKCHIP_DW_HDMI);
>> -	ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_driver,
>> +	ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_rockchip_driver,
>>   				CONFIG_ROCKCHIP_DW_MIPI_DSI);
>>   	ADD_ROCKCHIP_SUB_DRIVER(inno_hdmi_driver, CONFIG_ROCKCHIP_INNO_HDMI);
>>   
>> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
>> index 498dfbc..af235b2 100644
>> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
>> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
>> @@ -66,7 +66,7 @@ void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
>>   
>>   extern struct platform_driver cdn_dp_driver;
>>   extern struct platform_driver dw_hdmi_rockchip_pltfm_driver;
>> -extern struct platform_driver dw_mipi_dsi_driver;
>> +extern struct platform_driver dw_mipi_dsi_rockchip_driver;
>>   extern struct platform_driver inno_hdmi_driver;
>>   extern struct platform_driver rockchip_dp_driver;
>>   extern struct platform_driver rockchip_lvds_driver;
>
>


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[PATCH v3 5/5] arm64: dts: rockchip: update mipi node for RK3399

[Nickey Yang]

This patch update mipi node for RK3399 DSI controller
based on the Synopsys DesignWare MIPI DSI host controller.

Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
---
 arch/arm64/boot/dts/rockchip/rk3399.dtsi | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
index d340b58a..0ac67a9 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
@@ -1652,9 +1652,11 @@
 		status = "disabled";
 
 		ports {
-			mipi_in: port {
-				#address-cells = <1>;
-				#size-cells = <0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			mipi_in: port@0 {
+				reg = <0>;
 
 				mipi_in_vopb: endpoint@0 {
 					reg = <0>;
-- 
1.9.1

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Re: [PATCH v3 5/5] arm64: dts: rockchip: update mipi node for RK3399

[Brian Norris]

+ Doug, since he was asking these things elsewhere

On Tue, Nov 28, 2017 at 07:20:06PM +0800, Nickey Yang wrote:
> This patch update mipi node for RK3399 DSI controller
> based on the Synopsys DesignWare MIPI DSI host controller.
> 
> Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
> ---
>  arch/arm64/boot/dts/rockchip/rk3399.dtsi | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> index d340b58a..0ac67a9 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> @@ -1652,9 +1652,11 @@
>  		status = "disabled";
>  
>  		ports {
> -			mipi_in: port {
> -				#address-cells = <1>;
> -				#size-cells = <0>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;

^^ It's good to add these here, since child nodes are going to have unit
addresses.

> +
> +			mipi_in: port@0 {
> +				reg = <0>;

^^ But you're removing the #{address,size}-cells from the port, while
still using unit addresses on its subnodes (the endpoint@... nodes). You
should keep *both*, since both the 'ports' node and the 'port@0' node
will have children with addresses.

Brian

>  
>  				mipi_in_vopb: endpoint@0 {
>  					reg = <0>;
> -- 
> 1.9.1
> 
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