Re: [PATCH v5, 17/32] drm/mediatek: add component DITHER

[CK Hu]

Hi, Yongqiang:

On Thu, 2019-08-29 at 22:50 +0800, yongqiang.niu@xxxxxxxxxxxx wrote:
> From: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx>
> 
> This patch add component DITHER
> 

Applied to mediatek-drm-next-5.5 [1], thanks.

[1]
https://github.com/ckhu-mediatek/linux.git-tags/commits/mediatek-drm-next-5.5

Regards,
CK

> Signed-off-by: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx>
> Reviewed-by: CK Hu <ck.hu@xxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 32 +++++++++++++++++++++++++++++
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  2 ++
>  2 files changed, 34 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index af8e872..8fea985 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -39,6 +39,12 @@
>  #define CCORR_RELAY_MODE			BIT(0)
>  #define DISP_CCORR_SIZE				0x0030
>  
> +#define DISP_DITHER_EN				0x0000
> +#define DITHER_EN				BIT(0)
> +#define DISP_DITHER_CFG				0x0020
> +#define DITHER_RELAY_MODE			BIT(0)
> +#define DISP_DITHER_SIZE			0x0030
> +
>  #define DISP_GAMMA_EN				0x0000
>  #define DISP_GAMMA_CFG				0x0020
>  #define DISP_GAMMA_SIZE				0x0030
> @@ -147,6 +153,24 @@ static void mtk_ccorr_stop(struct mtk_ddp_comp *comp)
>  	writel_relaxed(0x0, comp->regs + DISP_CCORR_EN);
>  }
>  
> +static void mtk_dither_config(struct mtk_ddp_comp *comp, unsigned int w,
> +			      unsigned int h, unsigned int vrefresh,
> +			      unsigned int bpc)
> +{
> +	writel(h << 16 | w, comp->regs + DISP_DITHER_SIZE);
> +	writel(DITHER_RELAY_MODE, comp->regs + DISP_DITHER_CFG);
> +}
> +
> +static void mtk_dither_start(struct mtk_ddp_comp *comp)
> +{
> +	writel(DITHER_EN, comp->regs + DISP_DITHER_EN);
> +}
> +
> +static void mtk_dither_stop(struct mtk_ddp_comp *comp)
> +{
> +	writel_relaxed(0x0, comp->regs + DISP_DITHER_EN);
> +}
> +
>  static void mtk_gamma_config(struct mtk_ddp_comp *comp, unsigned int w,
>  			     unsigned int h, unsigned int vrefresh,
>  			     unsigned int bpc)
> @@ -201,6 +225,12 @@ static void mtk_gamma_set(struct mtk_ddp_comp *comp,
>  	.stop = mtk_ccorr_stop,
>  };
>  
> +static const struct mtk_ddp_comp_funcs ddp_dither = {
> +	.config = mtk_dither_config,
> +	.start = mtk_dither_start,
> +	.stop = mtk_dither_stop,
> +};
> +
>  static const struct mtk_ddp_comp_funcs ddp_gamma = {
>  	.gamma_set = mtk_gamma_set,
>  	.config = mtk_gamma_config,
> @@ -226,6 +256,7 @@ static void mtk_gamma_set(struct mtk_ddp_comp *comp,
>  	[MTK_DISP_CCORR] = "ccorr",
>  	[MTK_DISP_AAL] = "aal",
>  	[MTK_DISP_GAMMA] = "gamma",
> +	[MTK_DISP_DITHER] = "dither",
>  	[MTK_DISP_UFOE] = "ufoe",
>  	[MTK_DSI] = "dsi",
>  	[MTK_DPI] = "dpi",
> @@ -248,6 +279,7 @@ struct mtk_ddp_comp_match {
>  	[DDP_COMPONENT_CCORR]	= { MTK_DISP_CCORR,	0, &ddp_ccorr },
>  	[DDP_COMPONENT_COLOR0]	= { MTK_DISP_COLOR,	0, NULL },
>  	[DDP_COMPONENT_COLOR1]	= { MTK_DISP_COLOR,	1, NULL },
> +	[DDP_COMPONENT_DITHER]	= { MTK_DISP_DITHER,	0, &ddp_dither },
>  	[DDP_COMPONENT_DPI0]	= { MTK_DPI,		0, NULL },
>  	[DDP_COMPONENT_DPI1]	= { MTK_DPI,		1, NULL },
>  	[DDP_COMPONENT_DSI0]	= { MTK_DSI,		0, NULL },
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index 962d14a..85e096a 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -22,6 +22,7 @@ enum mtk_ddp_comp_type {
>  	MTK_DISP_WDMA,
>  	MTK_DISP_COLOR,
>  	MTK_DISP_CCORR,
> +	MTK_DISP_DITHER,
>  	MTK_DISP_AAL,
>  	MTK_DISP_GAMMA,
>  	MTK_DISP_UFOE,
> @@ -41,6 +42,7 @@ enum mtk_ddp_comp_id {
>  	DDP_COMPONENT_CCORR,
>  	DDP_COMPONENT_COLOR0,
>  	DDP_COMPONENT_COLOR1,
> +	DDP_COMPONENT_DITHER,
>  	DDP_COMPONENT_DPI0,
>  	DDP_COMPONENT_DPI1,
>  	DDP_COMPONENT_DSI0,