Re: [PATCH v3.1 1/3] drm/rockchip: dw_hdmi: add RK3399 HDMI support

[Heiko Stuebner]

Hi Mark,

Am Donnerstag, 22. Juni 2017, 15:17:24 CEST schrieb Mark Yao:
> RK3399 and RK3288 shared the same HDMI IP controller, only some light
> difference with GRF configure.
> 
> Signed-off-by: Yakir Yang <ykk@xxxxxxxxxxxxxx>
> Signed-off-by: Mark Yao <mark.yao@xxxxxxxxxxxxxx>
> ---
> Changes in v3.1:
>   Correct documentation compatible's format(Rob Herring).
> Changes in v3:
>   remove hdmi_phy_configure_dwc_hdmi_3d_tx callbak.
> 
> Changes in v2:
>   reuse hdmi_phy_configure_dwc_hdmi_3d_tx for phy configure
>   fixup Documentation
> 
>  .../bindings/display/rockchip/dw_hdmi-rockchip.txt |  4 +-
>  drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c        | 67 ++++++++++++++++++----
>  2 files changed, 59 insertions(+), 12 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/rockchip/dw_hdmi-rockchip.txt b/Documentation/devicetree/bindings/display/rockchip/dw_hdmi-rockchip.txt
> index 046076c..7039a15 100644
> --- a/Documentation/devicetree/bindings/display/rockchip/dw_hdmi-rockchip.txt
> +++ b/Documentation/devicetree/bindings/display/rockchip/dw_hdmi-rockchip.txt
> @@ -11,7 +11,9 @@ following device-specific properties.
>  
>  Required properties:
>  
> -- compatible: Shall contain "rockchip,rk3288-dw-hdmi".
> +- compatible: should be one of the following:
> +		"rockchip,rk3288-dw-hdmi"
> +		"rockchip,rk3399-dw-hdmi"
>  - reg: See dw_hdmi.txt.
>  - reg-io-width: See dw_hdmi.txt. Shall be 4.
>  - interrupts: HDMI interrupt number
> diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> index 63dab6f..90aaaf4 100644
> --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> @@ -20,13 +20,30 @@
>  #include "rockchip_drm_drv.h"
>  #include "rockchip_drm_vop.h"
>  
> -#define GRF_SOC_CON6                    0x025c
> -#define HDMI_SEL_VOP_LIT                (1 << 4)
> +#define RK3288_GRF_SOC_CON6		0x025C
> +#define RK3288_HDMI_LCDC_SEL		BIT(4)
> +#define RK3399_GRF_SOC_CON20		0x6250
> +#define RK3399_HDMI_LCDC_SEL		BIT(6)
> +
> +#define HIWORD_UPDATE(val, mask)	(val | (mask) << 16)
> +
> +/**
> + * struct rockchip_hdmi_chip_data - splite the grf setting of kind of chips
> + * @lcdsel_grf_reg: grf register offset of lcdc select
> + * @lcdsel_big: reg value of selecting vop big for HDMI
> + * @lcdsel_lit: reg value of selecting vop little for HDMI
> + */
> +struct rockchip_hdmi_chip_data {
> +	u32	lcdsel_grf_reg;

How do you plan on handling the rk3368 (with only one VOP and thus
no selection happening)? I'd just make the above an int, so we could
set it to -1 for that case. (value 0 is after all a valid reg).


Heiko


> +	u32	lcdsel_big;
> +	u32	lcdsel_lit;
> +};
>  
>  struct rockchip_hdmi {
>  	struct device *dev;
>  	struct regmap *regmap;
>  	struct drm_encoder encoder;
> +	const struct rockchip_hdmi_chip_data *chip_data;
>  };
>  
>  #define to_rockchip_hdmi(x)	container_of(x, struct rockchip_hdmi, x)
> @@ -198,17 +215,20 @@ static void dw_hdmi_rockchip_encoder_enable(struct drm_encoder *encoder)
>  {
>  	struct rockchip_hdmi *hdmi = to_rockchip_hdmi(encoder);
>  	u32 val;
> -	int mux;
> +	int ret;
>  
> -	mux = drm_of_encoder_active_endpoint_id(hdmi->dev->of_node, encoder);
> -	if (mux)
> -		val = HDMI_SEL_VOP_LIT | (HDMI_SEL_VOP_LIT << 16);
> +	ret = drm_of_encoder_active_endpoint_id(hdmi->dev->of_node, encoder);
> +	if (ret)
> +		val = hdmi->chip_data->lcdsel_lit;
>  	else
> -		val = HDMI_SEL_VOP_LIT << 16;
> +		val = hdmi->chip_data->lcdsel_big;
> +
> +	ret = regmap_write(hdmi->regmap, hdmi->chip_data->lcdsel_grf_reg, val);
> +	if (ret != 0)
> +		dev_err(hdmi->dev, "Could not write to GRF: %d\n", ret);
>  
> -	regmap_write(hdmi->regmap, GRF_SOC_CON6, val);
>  	dev_dbg(hdmi->dev, "vop %s output to hdmi\n",
> -		(mux) ? "LIT" : "BIG");
> +		ret ? "LIT" : "BIG");
>  }
>  
>  static int
> @@ -232,16 +252,40 @@ static void dw_hdmi_rockchip_encoder_enable(struct drm_encoder *encoder)
>  	.atomic_check = dw_hdmi_rockchip_encoder_atomic_check,
>  };
>  
> -static const struct dw_hdmi_plat_data rockchip_hdmi_drv_data = {
> +static struct rockchip_hdmi_chip_data rk3288_chip_data = {
> +	.lcdsel_grf_reg = RK3288_GRF_SOC_CON6,
> +	.lcdsel_big = HIWORD_UPDATE(0, RK3288_HDMI_LCDC_SEL),
> +	.lcdsel_lit = HIWORD_UPDATE(RK3288_HDMI_LCDC_SEL, RK3288_HDMI_LCDC_SEL),
> +};
> +
> +static const struct dw_hdmi_plat_data rk3288_hdmi_drv_data = {
> +	.mode_valid = dw_hdmi_rockchip_mode_valid,
> +	.mpll_cfg   = rockchip_mpll_cfg,
> +	.cur_ctr    = rockchip_cur_ctr,
> +	.phy_config = rockchip_phy_config,
> +	.phy_data = &rk3288_chip_data,
> +};
> +
> +static struct rockchip_hdmi_chip_data rk3399_chip_data = {
> +	.lcdsel_grf_reg = RK3399_GRF_SOC_CON20,
> +	.lcdsel_big = HIWORD_UPDATE(0, RK3399_HDMI_LCDC_SEL),
> +	.lcdsel_lit = HIWORD_UPDATE(RK3399_HDMI_LCDC_SEL, RK3399_HDMI_LCDC_SEL),
> +};
> +
> +static const struct dw_hdmi_plat_data rk3399_hdmi_drv_data = {
>  	.mode_valid = dw_hdmi_rockchip_mode_valid,
>  	.mpll_cfg   = rockchip_mpll_cfg,
>  	.cur_ctr    = rockchip_cur_ctr,
>  	.phy_config = rockchip_phy_config,
> +	.phy_data = &rk3399_chip_data,
>  };
>  
>  static const struct of_device_id dw_hdmi_rockchip_dt_ids[] = {
>  	{ .compatible = "rockchip,rk3288-dw-hdmi",
> -	  .data = &rockchip_hdmi_drv_data
> +	  .data = &rk3288_hdmi_drv_data
> +	},
> +	{ .compatible = "rockchip,rk3399-dw-hdmi",
> +	  .data = &rk3399_hdmi_drv_data
>  	},
>  	{},
>  };
> @@ -268,6 +312,7 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
>  	match = of_match_node(dw_hdmi_rockchip_dt_ids, pdev->dev.of_node);
>  	plat_data = match->data;
>  	hdmi->dev = &pdev->dev;
> +	hdmi->chip_data = plat_data->phy_data;
>  	encoder = &hdmi->encoder;
>  
>  	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
>