[PATCH v3 0/4] RK3399 dw-mipi-dsi patches

[PATCH v3 0/4] RK3399 dw-mipi-dsi patches

[Chris Zhong]

Hi all

This series set the phy_cfg_clk to be a required clock for RK3399, and
add a grf clock control in dw-mipi-dsi driver. And then correct a
register name.


Changes in v3:
- add a DW_MIPI_NEEDS_PHY_CFG_CLK for RK3399
- add a DW_MIPI_NEEDS_GRF_CLK for RK3399

Changes in v2:
- check the grf_clk only for RK3399

Chris Zhong (4):
  drm/rockchip/dsi: check phy_cfg_clk only for RK3399
  dt-bindings: add the grf clock for dw-mipi-dsi
  drm/rockchip/dsi: enable the grf clk before writing grf registers
  drm/rockchip/dsi: correct the grf_switch_reg name

 .../display/rockchip/dw_mipi_dsi_rockchip.txt      |  2 +-
 drivers/gpu/drm/rockchip/dw-mipi-dsi.c             | 42 +++++++++++++++++-----
 2 files changed, 35 insertions(+), 9 deletions(-)

-- 
2.6.3

[PATCH v3 1/4] drm/rockchip/dsi: check phy_cfg_clk only for RK3399

[Chris Zhong]

For RK3399, the phy_cfg_clk is a required clock, if phy_cfg_clk is
disabled, MIPI phy can not work. Let's return a error if there is no
phy_cfg_clk in dts property, when the pdata match RK3399.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
---

Changes in v3:
- add a DW_MIPI_NEEDS_PHY_CFG_CLK for RK3399

Changes in v2: None

 drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index f84f9ae..68f48b0 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -251,6 +251,8 @@
 #define THS_PRE_PROGRAM_EN	BIT(7)
 #define THS_ZERO_PROGRAM_EN	BIT(6)
 
+#define DW_MIPI_NEEDS_PHY_CFG_CLK	BIT(0)
+
 enum {
 	BANDGAP_97_07,
 	BANDGAP_98_05,
@@ -279,6 +281,7 @@ struct dw_mipi_dsi_plat_data {
 	u32 grf_switch_reg;
 	u32 grf_dsi0_mode;
 	u32 grf_dsi0_mode_reg;
+	unsigned int flags;
 	unsigned int max_data_lanes;
 };
 
@@ -1136,6 +1139,7 @@ static struct dw_mipi_dsi_plat_data rk3399_mipi_dsi_drv_data = {
 	.grf_switch_reg = RK3399_GRF_SOC_CON19,
 	.grf_dsi0_mode = RK3399_GRF_DSI_MODE,
 	.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
+	.flags = DW_MIPI_NEEDS_PHY_CFG_CLK,
 	.max_data_lanes = 4,
 };
 
@@ -1227,15 +1231,13 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
 		clk_disable_unprepare(dsi->pclk);
 	}
 
-	dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
-	if (IS_ERR(dsi->phy_cfg_clk)) {
-		ret = PTR_ERR(dsi->phy_cfg_clk);
-		if (ret != -ENOENT) {
+	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);
 			dev_err(dev, "Unable to get phy_cfg_clk: %d\n", ret);
 			return ret;
 		}
-		dsi->phy_cfg_clk = NULL;
-		dev_dbg(dev, "have not phy_cfg_clk\n");
 	}
 
 	ret = clk_prepare_enable(dsi->pllref_clk);
-- 
2.6.3

Re: [PATCH v3 1/4] drm/rockchip/dsi: check phy_cfg_clk only for RK3399

[Sean Paul]

On Fri, Mar 17, 2017 at 11:54:21AM +0800, Chris Zhong wrote:
> For RK3399, the phy_cfg_clk is a required clock, if phy_cfg_clk is
> disabled, MIPI phy can not work. Let's return a error if there is no
> phy_cfg_clk in dts property, when the pdata match RK3399.
> 

The dt bindings say this is a required clock, I think you'll need to update them
to reflect that this is optional for certain SoCs

Sean

> Signed-off-by: Chris Zhong <zyw@rock-chips.com>
> ---
> 
> Changes in v3:
> - add a DW_MIPI_NEEDS_PHY_CFG_CLK for RK3399
> 
> Changes in v2: None
> 
>  drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 14 ++++++++------
>  1 file changed, 8 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> index f84f9ae..68f48b0 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> @@ -251,6 +251,8 @@
>  #define THS_PRE_PROGRAM_EN	BIT(7)
>  #define THS_ZERO_PROGRAM_EN	BIT(6)
>  
> +#define DW_MIPI_NEEDS_PHY_CFG_CLK	BIT(0)
> +
>  enum {
>  	BANDGAP_97_07,
>  	BANDGAP_98_05,
> @@ -279,6 +281,7 @@ struct dw_mipi_dsi_plat_data {
>  	u32 grf_switch_reg;
>  	u32 grf_dsi0_mode;
>  	u32 grf_dsi0_mode_reg;
> +	unsigned int flags;
>  	unsigned int max_data_lanes;
>  };
>  
> @@ -1136,6 +1139,7 @@ static struct dw_mipi_dsi_plat_data rk3399_mipi_dsi_drv_data = {
>  	.grf_switch_reg = RK3399_GRF_SOC_CON19,
>  	.grf_dsi0_mode = RK3399_GRF_DSI_MODE,
>  	.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
> +	.flags = DW_MIPI_NEEDS_PHY_CFG_CLK,
>  	.max_data_lanes = 4,
>  };
>  
> @@ -1227,15 +1231,13 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
>  		clk_disable_unprepare(dsi->pclk);
>  	}
>  
> -	dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
> -	if (IS_ERR(dsi->phy_cfg_clk)) {
> -		ret = PTR_ERR(dsi->phy_cfg_clk);
> -		if (ret != -ENOENT) {
> +	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);
>  			dev_err(dev, "Unable to get phy_cfg_clk: %d\n", ret);
>  			return ret;
>  		}
> -		dsi->phy_cfg_clk = NULL;
> -		dev_dbg(dev, "have not phy_cfg_clk\n");
>  	}
>  
>  	ret = clk_prepare_enable(dsi->pllref_clk);
> -- 
> 2.6.3
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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

Re: [PATCH v3 1/4] drm/rockchip/dsi: check phy_cfg_clk only for RK3399

[Sean Paul]

On Tue, Mar 21, 2017 at 04:16:23PM -0400, Sean Paul wrote:
> On Fri, Mar 17, 2017 at 11:54:21AM +0800, Chris Zhong wrote:
> > For RK3399, the phy_cfg_clk is a required clock, if phy_cfg_clk is
> > disabled, MIPI phy can not work. Let's return a error if there is no
> > phy_cfg_clk in dts property, when the pdata match RK3399.
> > 
> 
> The dt bindings say this is a required clock, I think you'll need to update them
> to reflect that this is optional for certain SoCs
> 

As stated in the other patch, I didn't read the binding close enough. Sorry
about that.

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

Sean

> Sean
> 
> > Signed-off-by: Chris Zhong <zyw@rock-chips.com>
> > ---
> > 
> > Changes in v3:
> > - add a DW_MIPI_NEEDS_PHY_CFG_CLK for RK3399
> > 
> > Changes in v2: None
> > 
> >  drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 14 ++++++++------
> >  1 file changed, 8 insertions(+), 6 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> > index f84f9ae..68f48b0 100644
> > --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> > +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> > @@ -251,6 +251,8 @@
> >  #define THS_PRE_PROGRAM_EN	BIT(7)
> >  #define THS_ZERO_PROGRAM_EN	BIT(6)
> >  
> > +#define DW_MIPI_NEEDS_PHY_CFG_CLK	BIT(0)
> > +
> >  enum {
> >  	BANDGAP_97_07,
> >  	BANDGAP_98_05,
> > @@ -279,6 +281,7 @@ struct dw_mipi_dsi_plat_data {
> >  	u32 grf_switch_reg;
> >  	u32 grf_dsi0_mode;
> >  	u32 grf_dsi0_mode_reg;
> > +	unsigned int flags;
> >  	unsigned int max_data_lanes;
> >  };
> >  
> > @@ -1136,6 +1139,7 @@ static struct dw_mipi_dsi_plat_data rk3399_mipi_dsi_drv_data = {
> >  	.grf_switch_reg = RK3399_GRF_SOC_CON19,
> >  	.grf_dsi0_mode = RK3399_GRF_DSI_MODE,
> >  	.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
> > +	.flags = DW_MIPI_NEEDS_PHY_CFG_CLK,
> >  	.max_data_lanes = 4,
> >  };
> >  
> > @@ -1227,15 +1231,13 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
> >  		clk_disable_unprepare(dsi->pclk);
> >  	}
> >  
> > -	dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
> > -	if (IS_ERR(dsi->phy_cfg_clk)) {
> > -		ret = PTR_ERR(dsi->phy_cfg_clk);
> > -		if (ret != -ENOENT) {
> > +	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);
> >  			dev_err(dev, "Unable to get phy_cfg_clk: %d\n", ret);
> >  			return ret;
> >  		}
> > -		dsi->phy_cfg_clk = NULL;
> > -		dev_dbg(dev, "have not phy_cfg_clk\n");
> >  	}
> >  
> >  	ret = clk_prepare_enable(dsi->pllref_clk);
> > -- 
> > 2.6.3
> > 
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel
> 
> -- 
> Sean Paul, Software Engineer, Google / Chromium OS

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

[PATCH v3 2/4] dt-bindings: add the grf clock for dw-mipi-dsi

[Chris Zhong]

For RK3399, the grf clock should be controlled by dw-mipi-dsi driver,
add the description for this clock.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
---

Changes in v3: None
Changes in v2: None

 .../devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt       | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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 188f6f7..7e17a60 100644
--- a/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
+++ b/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
@@ -10,7 +10,7 @@ Required properties:
 - interrupts: Represent the controller's interrupt to the CPU(s).
 - clocks, clock-names: Phandles to the controller's pll reference
   clock(ref) and APB clock(pclk). For RK3399, a phy config clock
-  (phy_cfg) is additional required. As described in [1].
+  (phy_cfg) and a grf clock(grf) are additional required. As described in [1].
 - 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.
-- 
2.6.3

Re: [PATCH v3 2/4] dt-bindings: add the grf clock for dw-mipi-dsi

[Sean Paul]

On Fri, Mar 17, 2017 at 11:54:22AM +0800, Chris Zhong wrote:
> For RK3399, the grf clock should be controlled by dw-mipi-dsi driver,
> add the description for this clock.
> 
> Signed-off-by: Chris Zhong <zyw@rock-chips.com>
> ---
> 
> Changes in v3: None
> Changes in v2: None
> 
>  .../devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt       | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> 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 188f6f7..7e17a60 100644
> --- a/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
> +++ b/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
> @@ -10,7 +10,7 @@ Required properties:
>  - interrupts: Represent the controller's interrupt to the CPU(s).
>  - clocks, clock-names: Phandles to the controller's pll reference
>    clock(ref) and APB clock(pclk). For RK3399, a phy config clock
> -  (phy_cfg) is additional required. As described in [1].
> +  (phy_cfg) and a grf clock(grf) are additional required. As described in [1].

These are only required for rk3399, you should make that clear.

Sean

>  - 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.
> -- 
> 2.6.3
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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

Re: [PATCH v3 2/4] dt-bindings: add the grf clock for dw-mipi-dsi

[Sean Paul]

On Tue, Mar 21, 2017 at 04:17:00PM -0400, Sean Paul wrote:
> On Fri, Mar 17, 2017 at 11:54:22AM +0800, Chris Zhong wrote:
> > For RK3399, the grf clock should be controlled by dw-mipi-dsi driver,
> > add the description for this clock.
> > 
> > Signed-off-by: Chris Zhong <zyw@rock-chips.com>
> > ---
> > 
> > Changes in v3: None
> > Changes in v2: None
> > 
> >  .../devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt       | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > 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 188f6f7..7e17a60 100644
> > --- a/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
> > +++ b/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
> > @@ -10,7 +10,7 @@ Required properties:
> >  - interrupts: Represent the controller's interrupt to the CPU(s).
> >  - clocks, clock-names: Phandles to the controller's pll reference
> >    clock(ref) and APB clock(pclk). For RK3399, a phy config clock
> > -  (phy_cfg) is additional required. As described in [1].
> > +  (phy_cfg) and a grf clock(grf) are additional required. As described in [1].
> 
> These are only required for rk3399, you should make that clear.
> 

I completely missed "For RK3399" on my first pass, sigh. Sorry for the reading
comprehension fail.

Minor nit if you want: s/additional// && s/. As/, as/

Either way,

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

Sean

> Sean
> 
> >  - 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.
> > -- 
> > 2.6.3
> > 
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel
> 
> -- 
> Sean Paul, Software Engineer, Google / Chromium OS

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

[PATCH v3 3/4] drm/rockchip/dsi: enable the grf clk before writing grf registers

[Chris Zhong]

For RK3399, the grf clk should be enabled before writing grf registers,
otherwise the register value can not be changed.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
---

Changes in v3:
- add a DW_MIPI_NEEDS_GRF_CLK for RK3399

Changes in v2:
- check the grf_clk only for RK3399

 drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index 68f48b0..5a18281 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -252,6 +252,7 @@
 #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,
@@ -294,6 +295,7 @@ struct dw_mipi_dsi {
 	struct regmap *grf_regmap;
 	void __iomem *base;
 
+	struct clk *grf_clk;
 	struct clk *pllref_clk;
 	struct clk *pclk;
 	struct clk *phy_cfg_clk;
@@ -982,6 +984,17 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
 	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) {
+		dev_err(dsi->dev, "Failed to enable grf_clk\n");
+		return;
+	}
+
 	if (pdata->grf_dsi0_mode_reg)
 		regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
 			     pdata->grf_dsi0_mode);
@@ -1006,6 +1019,8 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
 	regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
 	dev_dbg(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
@@ -1139,7 +1154,7 @@ static struct dw_mipi_dsi_plat_data rk3399_mipi_dsi_drv_data = {
 	.grf_switch_reg = RK3399_GRF_SOC_CON19,
 	.grf_dsi0_mode = RK3399_GRF_DSI_MODE,
 	.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
-	.flags = DW_MIPI_NEEDS_PHY_CFG_CLK,
+	.flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK,
 	.max_data_lanes = 4,
 };
 
@@ -1240,6 +1255,15 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
 		}
 	}
 
+	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);
+			dev_err(dev, "Unable to get grf_clk: %d\n", ret);
+			return ret;
+		}
+	}
+
 	ret = clk_prepare_enable(dsi->pllref_clk);
 	if (ret) {
 		dev_err(dev, "%s: Failed to enable pllref_clk\n", __func__);
-- 
2.6.3

Re: [PATCH v3 3/4] drm/rockchip/dsi: enable the grf clk before writing grf registers

[Sean Paul]

On Fri, Mar 17, 2017 at 11:54:23AM +0800, Chris Zhong wrote:
> For RK3399, the grf clk should be enabled before writing grf registers,
> otherwise the register value can not be changed.
> 
> Signed-off-by: Chris Zhong <zyw@rock-chips.com>

Minor nit below, with that:

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

> ---
> 
> Changes in v3:
> - add a DW_MIPI_NEEDS_GRF_CLK for RK3399
> 
> Changes in v2:
> - check the grf_clk only for RK3399
> 
>  drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 26 +++++++++++++++++++++++++-
>  1 file changed, 25 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> index 68f48b0..5a18281 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> @@ -252,6 +252,7 @@
>  #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,
> @@ -294,6 +295,7 @@ struct dw_mipi_dsi {
>  	struct regmap *grf_regmap;
>  	void __iomem *base;
>  
> +	struct clk *grf_clk;
>  	struct clk *pllref_clk;
>  	struct clk *pclk;
>  	struct clk *phy_cfg_clk;
> @@ -982,6 +984,17 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
>  	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) {
> +		dev_err(dsi->dev, "Failed to enable grf_clk\n");

nit: Print ret?

> +		return;
> +	}
> +
>  	if (pdata->grf_dsi0_mode_reg)
>  		regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
>  			     pdata->grf_dsi0_mode);
> @@ -1006,6 +1019,8 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
>  	regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
>  	dev_dbg(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
> @@ -1139,7 +1154,7 @@ static struct dw_mipi_dsi_plat_data rk3399_mipi_dsi_drv_data = {
>  	.grf_switch_reg = RK3399_GRF_SOC_CON19,
>  	.grf_dsi0_mode = RK3399_GRF_DSI_MODE,
>  	.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
> -	.flags = DW_MIPI_NEEDS_PHY_CFG_CLK,
> +	.flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK,
>  	.max_data_lanes = 4,
>  };
>  
> @@ -1240,6 +1255,15 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
>  		}
>  	}
>  
> +	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);
> +			dev_err(dev, "Unable to get grf_clk: %d\n", ret);
> +			return ret;
> +		}
> +	}
> +
>  	ret = clk_prepare_enable(dsi->pllref_clk);
>  	if (ret) {
>  		dev_err(dev, "%s: Failed to enable pllref_clk\n", __func__);
> -- 
> 2.6.3
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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

[PATCH v3 4/4] drm/rockchip/dsi: correct the grf_switch_reg name

[Chris Zhong]

For the RK3399, the grf_switch_reg name should be RK3399_GRF_SOC_CON20,
not RK3399_GRF_SOC_CON19.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
---

Changes in v3: None
Changes in v2: None

 drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index 5a18281..19b9208 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -34,7 +34,7 @@
 #define RK3288_DSI0_SEL_VOP_LIT		BIT(6)
 #define RK3288_DSI1_SEL_VOP_LIT		BIT(9)
 
-#define RK3399_GRF_SOC_CON19		0x6250
+#define RK3399_GRF_SOC_CON20		0x6250
 #define RK3399_DSI0_SEL_VOP_LIT		BIT(0)
 #define RK3399_DSI1_SEL_VOP_LIT		BIT(4)
 
@@ -1151,7 +1151,7 @@ static struct dw_mipi_dsi_plat_data rk3288_mipi_dsi_drv_data = {
 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_CON19,
+	.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,
-- 
2.6.3

Re: [PATCH v3 4/4] drm/rockchip/dsi: correct the grf_switch_reg name

[Brian Norris]

On Fri, Mar 17, 2017 at 11:54:24AM +0800, Chris Zhong wrote:
> For the RK3399, the grf_switch_reg name should be RK3399_GRF_SOC_CON20,
> not RK3399_GRF_SOC_CON19.

Matches the TRM for me, and otherwise it's a no-op:

Reviewed-by: Brian Norris <briannorris@chromium.org>

> Signed-off-by: Chris Zhong <zyw@rock-chips.com>
> ---
> 
> Changes in v3: None
> Changes in v2: None
> 
>  drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> index 5a18281..19b9208 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> @@ -34,7 +34,7 @@
>  #define RK3288_DSI0_SEL_VOP_LIT		BIT(6)
>  #define RK3288_DSI1_SEL_VOP_LIT		BIT(9)
>  
> -#define RK3399_GRF_SOC_CON19		0x6250
> +#define RK3399_GRF_SOC_CON20		0x6250
>  #define RK3399_DSI0_SEL_VOP_LIT		BIT(0)
>  #define RK3399_DSI1_SEL_VOP_LIT		BIT(4)
>  
> @@ -1151,7 +1151,7 @@ static struct dw_mipi_dsi_plat_data rk3288_mipi_dsi_drv_data = {
>  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_CON19,
> +	.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,
> -- 
> 2.6.3

Re: [PATCH v3 4/4] drm/rockchip/dsi: correct the grf_switch_reg name

[Sean Paul]

On Fri, Mar 17, 2017 at 11:54:24AM +0800, Chris Zhong wrote:
> For the RK3399, the grf_switch_reg name should be RK3399_GRF_SOC_CON20,
> not RK3399_GRF_SOC_CON19.
> 
> Signed-off-by: Chris Zhong <zyw@rock-chips.com>

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

> ---
> 
> Changes in v3: None
> Changes in v2: None
> 
>  drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> index 5a18281..19b9208 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> @@ -34,7 +34,7 @@
>  #define RK3288_DSI0_SEL_VOP_LIT		BIT(6)
>  #define RK3288_DSI1_SEL_VOP_LIT		BIT(9)
>  
> -#define RK3399_GRF_SOC_CON19		0x6250
> +#define RK3399_GRF_SOC_CON20		0x6250
>  #define RK3399_DSI0_SEL_VOP_LIT		BIT(0)
>  #define RK3399_DSI1_SEL_VOP_LIT		BIT(4)
>  
> @@ -1151,7 +1151,7 @@ static struct dw_mipi_dsi_plat_data rk3288_mipi_dsi_drv_data = {
>  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_CON19,
> +	.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,
> -- 
> 2.6.3
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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

Re: [PATCH v3 0/4] RK3399 dw-mipi-dsi patches

[Brian Norris]

On Fri, Mar 17, 2017 at 11:54:20AM +0800, Chris Zhong wrote:
> Hi all
> 
> This series set the phy_cfg_clk to be a required clock for RK3399, and
> add a grf clock control in dw-mipi-dsi driver. And then correct a
> register name.

Series looks good to me, and works well on RK3399.

Tested-by: Brian Norris <briannorris@chromium.org>