Re: [PATCH RESEND v6 03/11] drm/mediatek: gamma: Support SoC specific LUT size

CK Hu (胡俊光)
2023-07-31T07:49:18Z

Hi, Angelo:

On Thu, 2023-07-27 at 11:46 +0200, AngeloGioacchino Del Regno wrote:
> Newer SoCs support a bigger Gamma LUT table: wire up a callback
> to retrieve the correct LUT size for each different Gamma IP.
>
> Co-developed-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
> [Angelo: Rewritten commit message/description + porting]
> Signed-off-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@collabora.com>
> Reviewed-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_disp_drv.h | 1 +
> drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 25 ++++++++++++++++++-
> --
> drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 4 ++--
> drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 -
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 9 ++++++++
> 6 files changed, 35 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> index 75045932353e..e554b19f4830 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> @@ -53,6 +53,7 @@ void mtk_gamma_clk_disable(struct device *dev);
> void mtk_gamma_config(struct device *dev, unsigned int w,
> unsigned int h, unsigned int vrefresh,
> unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> +unsigned int mtk_gamma_get_lut_size(struct device *dev);
> void mtk_gamma_set(struct device *dev, struct drm_crtc_state
> *state);
> void mtk_gamma_set_common(struct device *dev, void __iomem *regs,
> struct drm_crtc_state *state);
> void mtk_gamma_start(struct device *dev);
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> index ce6f2499b891..b25ba209e7a4 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> @@ -25,10 +25,12 @@
> #define DISP_GAMMA_LUT 0x0700
>
> #define LUT_10BIT_MASK 0x03ff
> +#define LUT_SIZE_DEFAULT 512
>
> struct mtk_disp_gamma_data {
> bool has_dither;
> bool lut_diff;
> + u16 lut_size;
> };
>
> /*
> @@ -55,6 +57,17 @@ void mtk_gamma_clk_disable(struct device *dev)
> clk_disable_unprepare(gamma->clk);
> }
>
> +unsigned int mtk_gamma_get_lut_size(struct device *dev)
> +{
> + struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> + unsigned int lut_size = LUT_SIZE_DEFAULT;
> +
> + if (gamma && gamma->data)
> + lut_size = gamma->data->lut_size;
> +
> + return lut_size;
> +}
> +
> void mtk_gamma_set_common(struct device *dev, void __iomem *regs,
> struct drm_crtc_state *state)
> {
> struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> @@ -62,6 +75,7 @@ void mtk_gamma_set_common(struct device *dev, void
> __iomem *regs, struct drm_crt
> struct drm_color_lut *lut;
> void __iomem *lut_base;
> bool lut_diff;
> + u16 lut_size;
> u32 word;
> u32 diff[3] = {0};
>
> @@ -69,17 +83,20 @@ void mtk_gamma_set_common(struct device *dev,
> void __iomem *regs, struct drm_crt
> if (!state->gamma_lut)
> return;
>
> - if (gamma && gamma->data)
> + if (gamma && gamma->data) {
> lut_diff = gamma->data->lut_diff;
> - else
> + lut_size = gamma->data->lut_size;
> + } else {
> lut_diff = false;
> + lut_size = LUT_SIZE_DEFAULT;
> + }
>
> reg = readl(regs + DISP_GAMMA_CFG);
> reg = reg | GAMMA_LUT_EN;
> writel(reg, regs + DISP_GAMMA_CFG);
> lut_base = regs + DISP_GAMMA_LUT;
> lut = (struct drm_color_lut *)state->gamma_lut->data;
> - for (i = 0; i < MTK_LUT_SIZE; i++) {
> + for (i = 0; i < lut_size; i++) {
> if (!lut_diff || (i % 2 == 0)) {
> word = (((lut[i].red >> 6) & LUT_10BIT_MASK) <<
> 20) +
> (((lut[i].green >> 6) & LUT_10BIT_MASK)
> << 10) +
> @@ -196,10 +213,12 @@ static int mtk_disp_gamma_remove(struct
> platform_device *pdev)
>
> static const struct mtk_disp_gamma_data mt8173_gamma_driver_data = {
> .has_dither = true,
> + .lut_size = 512,
> };
>
> static const struct mtk_disp_gamma_data mt8183_gamma_driver_data = {
> .lut_diff = true,
> + .lut_size = 512,
> };
>
> static const struct of_device_id mtk_disp_gamma_driver_dt_match[] =
> {
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index d40142842f85..0df62b076f49 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -958,8 +958,8 @@ int mtk_drm_crtc_create(struct drm_device
> *drm_dev,
> mtk_crtc->ddp_comp[i] = comp;
>
> if (comp->funcs) {
> - if (comp->funcs->gamma_set)
> - gamma_lut_size = MTK_LUT_SIZE;
> + if (comp->funcs->gamma_set && comp->funcs-
> >gamma_get_lut_size)
> + gamma_lut_size =
> mtk_ddp_gamma_get_lut_size(comp);

In this patch, for AAL, the gamma_lut_size is not defined.

Regards,
CK

>
> if (comp->funcs->ctm_set)
> has_ctm = true;
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> index 3e9046993d09..b2e50292e57d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> @@ -10,7 +10,6 @@
> #include "mtk_drm_ddp_comp.h"
> #include "mtk_drm_plane.h"
>
> -#define MTK_LUT_SIZE 512
> #define MTK_MAX_BPC 10
> #define MTK_MIN_BPC 3
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index f114da4d36a9..c77af2e4000f 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -322,6 +322,7 @@ static const struct mtk_ddp_comp_funcs ddp_dsi =
> {
> static const struct mtk_ddp_comp_funcs ddp_gamma = {
> .clk_enable = mtk_gamma_clk_enable,
> .clk_disable = mtk_gamma_clk_disable,
> + .gamma_get_lut_size = mtk_gamma_get_lut_size,
> .gamma_set = mtk_gamma_set,
> .config = mtk_gamma_config,
> .start = mtk_gamma_start,
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index febcaeef16a1..c1355960e195 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -67,6 +67,7 @@ struct mtk_ddp_comp_funcs {
> void (*layer_config)(struct device *dev, unsigned int idx,
> struct mtk_plane_state *state,
> struct cmdq_pkt *cmdq_pkt);
> + unsigned int (*gamma_get_lut_size)(struct device *dev);
> void (*gamma_set)(struct device *dev,
> struct drm_crtc_state *state);
> void (*bgclr_in_on)(struct device *dev);
> @@ -186,6 +187,14 @@ static inline void
> mtk_ddp_comp_layer_config(struct mtk_ddp_comp *comp,
> comp->funcs->layer_config(comp->dev, idx, state,
> cmdq_pkt);
> }
>
> +static inline unsigned int mtk_ddp_gamma_get_lut_size(struct
> mtk_ddp_comp *comp)
> +{
> + if (comp->funcs && comp->funcs->gamma_get_lut_size)
> + return comp->funcs->gamma_get_lut_size(comp->dev);
> +
> + return 0;
> +}
> +
> static inline void mtk_ddp_gamma_set(struct mtk_ddp_comp *comp,
> struct drm_crtc_state *state)
> {