Re: [PATCH v3 2/5] drm/rockchip/dsi: dw-mipi: support RK3399 mipi dsi

[Sean Paul <seanpaul-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>]

On Fri, Jan 20, 2017 at 06:10:48PM +0800, Chris Zhong wrote:
> The vopb/vopl switch register of RK3399 mipi is different from RK3288,
> the default setting for mipi dsi mode is different too, so add a
> of_device_id structure to distinguish them, and make sure set the
> correct mode before mipi phy init.
> 

Hi Chris,
There are a bunch of unrelated changes in this patch. Can you please split out
the whitespace/const changes into a separate clean-up patch so it's easier to
see the meaningful changes?

More comments below.

> Signed-off-by: Chris Zhong <zyw-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
> Signed-off-by: Mark Yao <mark.yao-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
> ---
> 
> Changes in v3:
> - base on John Keeping's patch series
> 
>  drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 101 ++++++++++++++++++++++++---------
>  1 file changed, 74 insertions(+), 27 deletions(-)
> 
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> index 45af890..a93ce97 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> @@ -29,9 +29,17 @@
>  
>  #define DRIVER_NAME    "dw-mipi-dsi"
>  
> -#define GRF_SOC_CON6                    0x025c
> -#define DSI0_SEL_VOP_LIT                (1 << 6)
> -#define DSI1_SEL_VOP_LIT                (1 << 9)
> +#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_CON19		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
> @@ -149,7 +157,6 @@
>  #define LPRX_TO_CNT(p)			((p) & 0xffff)
>  
>  #define DSI_BTA_TO_CNT			0x8c
> -

Unrelated whitespace change

>  #define DSI_LPCLK_CTRL			0x94
>  #define AUTO_CLKLANE_CTRL		BIT(1)
>  #define PHY_TXREQUESTCLKHS		BIT(0)
> @@ -215,11 +222,11 @@
>  
>  #define HSFREQRANGE_SEL(val)	(((val) & 0x3f) << 1)
>  
> -#define INPUT_DIVIDER(val)	((val - 1) & 0x7f)
> +#define INPUT_DIVIDER(val)	(((val) - 1) & 0x7f)

Unrelated change

>  #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 LOOP_DIV_LOW_SEL(val)	(((val) - 1) & 0x1f)
> +#define LOOP_DIV_HIGH_SEL(val)	((((val) - 1) >> 5) & 0x1f)

This change doesn't adversely affect other platforms?

>  #define PLL_LOOP_DIV_EN		BIT(5)
>  #define PLL_INPUT_DIV_EN	BIT(4)
>  
> @@ -265,6 +272,11 @@ enum {
>  };
>  
>  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 max_data_lanes;
>  	enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
>  					   struct drm_display_mode *mode);
> @@ -281,6 +293,7 @@ struct dw_mipi_dsi {
>  
>  	struct clk *pllref_clk;
>  	struct clk *pclk;
> +	struct clk *phy_cfg_clk;
>  
>  	unsigned int lane_mbps; /* per lane */
>  	u32 channel;
> @@ -356,6 +369,7 @@ 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);
> @@ -367,7 +381,7 @@ static inline u32 dsi_read(struct dw_mipi_dsi *dsi, u32 reg)
>  }
>  
>  static void dw_mipi_dsi_phy_write(struct dw_mipi_dsi *dsi, u8 test_code,
> -				 u8 test_data)
> +				  u8 test_data)

Unrelated whitespace change

>  {
>  	/*
>  	 * With the falling edge on TESTCLK, the TESTDIN[7:0] signal content
> @@ -426,6 +440,14 @@ static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
>  	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLR);
>  	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
>  
> +	if (!IS_ERR(dsi->phy_cfg_clk)) {
> +		ret = clk_prepare_enable(dsi->phy_cfg_clk);
> +		if (ret) {
> +			dev_err(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 |
> @@ -474,22 +496,23 @@ static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
>  	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) {
>  		dev_err(dsi->dev, "failed to wait for phy lock state\n");
> -		return ret;
> +		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) {
> +	if (ret < 0)
>  		dev_err(dsi->dev,
>  			"failed to wait for phy clk lane stop state\n");
> -		return ret;
> -	}
> +
> +phy_init_end:
> +	if (!IS_ERR(dsi->phy_cfg_clk))
> +		clk_disable_unprepare(dsi->phy_cfg_clk);
>  
>  	return ret;
>  }
> @@ -548,7 +571,7 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
>  
>  	if (device->lanes > dsi->pdata->max_data_lanes) {
>  		dev_err(dsi->dev, "the number of data lanes(%u) is too many\n",
> -				device->lanes);
> +			device->lanes);

Unrelated whitespace change

>  		return -EINVAL;
>  	}
>  
> @@ -936,8 +959,8 @@ static void dw_mipi_dsi_clear_err(struct dw_mipi_dsi *dsi)
>  }
>  
>  static void dw_mipi_dsi_encoder_mode_set(struct drm_encoder *encoder,
> -					struct drm_display_mode *mode,
> -					struct drm_display_mode *adjusted_mode)
> +					 struct drm_display_mode *mode,
> +					 struct drm_display_mode *adjusted_mode)

Unrelated whitespace change

>  {
>  	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
>  
> @@ -965,6 +988,7 @@ static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
>  static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
>  {
>  	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
> +	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;
>  
> @@ -985,6 +1009,10 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
>  	dw_mipi_dsi_dphy_interface_config(dsi);
>  	dw_mipi_dsi_clear_err(dsi);
>  
> +	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(dsi);
>  
> @@ -998,11 +1026,11 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
>  	clk_disable_unprepare(dsi->pclk);
>  
>  	if (mux)
> -		val = DSI0_SEL_VOP_LIT | (DSI0_SEL_VOP_LIT << 16);
> +		val = pdata->dsi0_en_bit | (pdata->dsi0_en_bit << 16);
>  	else
> -		val = DSI0_SEL_VOP_LIT << 16;
> +		val = pdata->dsi0_en_bit << 16;
>  
> -	regmap_write(dsi->grf_regmap, GRF_SOC_CON6, val);
> +	regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
>  	dev_dbg(dsi->dev, "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG");
>  }
>  
> @@ -1034,7 +1062,7 @@ dw_mipi_dsi_encoder_atomic_check(struct drm_encoder *encoder,
>  	return 0;
>  }
>  
> -static struct drm_encoder_helper_funcs
> +static const struct drm_encoder_helper_funcs
>  dw_mipi_dsi_encoder_helper_funcs = {
>  	.enable = dw_mipi_dsi_encoder_enable,
>  	.mode_set = dw_mipi_dsi_encoder_mode_set,
> @@ -1042,7 +1070,7 @@ dw_mipi_dsi_encoder_helper_funcs = {
>  	.atomic_check = dw_mipi_dsi_encoder_atomic_check,
>  };
>  
> -static struct drm_encoder_funcs dw_mipi_dsi_encoder_funcs = {
> +static const struct drm_encoder_funcs dw_mipi_dsi_encoder_funcs = {
>  	.destroy = drm_encoder_cleanup,
>  };
>  
> @@ -1078,7 +1106,7 @@ static void dw_mipi_dsi_drm_connector_destroy(struct drm_connector *connector)
>  	drm_connector_cleanup(connector);
>  }
>  
> -static struct drm_connector_funcs dw_mipi_dsi_atomic_connector_funcs = {
> +static const struct drm_connector_funcs dw_mipi_dsi_atomic_connector_funcs = {

These 3 const changes are unrelated to the patch

>  	.dpms = drm_atomic_helper_connector_dpms,
>  	.fill_modes = drm_helper_probe_single_connector_modes,
>  	.destroy = dw_mipi_dsi_drm_connector_destroy,
> @@ -1088,7 +1116,7 @@ static struct drm_connector_funcs dw_mipi_dsi_atomic_connector_funcs = {
>  };
>  
>  static int dw_mipi_dsi_register(struct drm_device *drm,
> -				      struct dw_mipi_dsi *dsi)
> +				struct dw_mipi_dsi *dsi)

Unrelated whitespace change

>  {
>  	struct drm_encoder *encoder = &dsi->encoder;
>  	struct drm_connector *connector = &dsi->connector;
> @@ -1109,14 +1137,14 @@ static int dw_mipi_dsi_register(struct drm_device *drm,
>  	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);
> +			       DRM_MODE_ENCODER_DSI, NULL);

Unrelated whitespace change

>  	if (ret) {
>  		dev_err(dev, "Failed to initialize encoder with drm\n");
>  		return ret;
>  	}
>  
>  	drm_connector_helper_add(connector,
> -			&dw_mipi_dsi_connector_helper_funcs);
> +				 &dw_mipi_dsi_connector_helper_funcs);

Unrelated whitespace change

>  
>  	drm_connector_init(drm, &dsi->connector,
>  			   &dw_mipi_dsi_atomic_connector_funcs,
> @@ -1162,21 +1190,36 @@ static enum drm_mode_status rk3288_mipi_dsi_mode_valid(
>  }
>  
>  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,
>  	.mode_valid = rk3288_mipi_dsi_mode_valid,
>  };
>  
> +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_dsi0_mode = RK3399_GRF_DSI_MODE,
> +	.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
> +	.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)
> +			    void *data)

Unrelated whitespace change

>  {
>  	const struct of_device_id *of_id =
>  			of_match_device(dw_mipi_dsi_dt_ids, dev);
> @@ -1249,6 +1292,10 @@ 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))
> +		dev_dbg(dev, "have not phy_cfg_clk\n");
> +
>  	ret = clk_prepare_enable(dsi->pllref_clk);
>  	if (ret) {
>  		dev_err(dev, "%s: Failed to enable pllref_clk\n", __func__);
> @@ -1280,7 +1327,7 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
>  }
>  
>  static void dw_mipi_dsi_unbind(struct device *dev, struct device *master,
> -	void *data)
> +			       void *data)

Unrelated whitespace change

>  {
>  	struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
>  
> -- 
> 2.6.3
> 
> _______________________________________________
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-- 
Sean Paul, Software Engineer, Google / Chromium OS
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