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

AngeloGioacchino Del Regno
2023-07-31T12:05:57Z

Il 31/07/23 12:40, AngeloGioacchino Del Regno ha scritto:
> Il 31/07/23 09:49, CK Hu (胡俊光) ha scritto:
>> 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.
>>
>
> It is defined: AAL will call mtk_gamma_set_common(), which will use
> the "DEFAULT" (512) LUT size if no platform data was provided and the
> platform data can only come from the mtk_gamma driver - so, if the
> call to mtk_gamma_set_common() comes from mtk_aal, it will use 512.
>
> P.S.: The call to drm_mode_crtc_set_gamma_size() is performed only if
>       gamma_lut_size > 0.
>

Actually, I see what you mean now. Gets fixed in v7. Thanks!

> Regards,
> Angelo
>
>> 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)
>>>   {
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