linux-kernel - Re: [PATCH 2/2] drm/msm/dpu: remove GC related code from dpu catalog

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Message-ID: <f400c714-8bee-895a-5bf7-bbaf9cbc0619@linaro.org>
Date:   Sat, 22 Apr 2023 02:09:15 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Abhinav Kumar <quic_abhinavk@...cinc.com>,
        freedreno@...ts.freedesktop.org, Rob Clark <robdclark@...il.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     dri-devel@...ts.freedesktop.org, quic_jesszhan@...cinc.com,
        marijn.suijten@...ainline.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] drm/msm/dpu: remove GC related code from dpu catalog

On 22/04/2023 01:47, Abhinav Kumar wrote:
> Since Gamma Correction (GC) block is currently unused, drop
> related code from the dpu hardware catalog otherwise this
> becomes a burden to carry across chipsets in the catalog.
> 
> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c | 4 +---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 6 ------
>   2 files changed, 1 insertion(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
> index 03f162af1a50..badfc3680485 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
> @@ -91,7 +91,7 @@
>   
>   #define MERGE_3D_SM8150_MASK (0)
>   
> -#define DSPP_MSM8998_MASK BIT(DPU_DSPP_PCC) | BIT(DPU_DSPP_GC)
> +#define DSPP_MSM8998_MASK BIT(DPU_DSPP_PCC)
>   
>   #define DSPP_SC7180_MASK BIT(DPU_DSPP_PCC)

At this point we can merge these two masks.

Could you please extend this for v2 with the following patches:
- merge of two DSPP_foo_MASKs
- dropping of DPU_DSPP_IGC?

For this patch:

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

>   
> @@ -449,8 +449,6 @@ static const struct dpu_lm_sub_blks qcm2290_lm_sblk = {
>   static const struct dpu_dspp_sub_blks msm8998_dspp_sblk = {
>   	.pcc = {.id = DPU_DSPP_PCC, .base = 0x1700,
>   		.len = 0x90, .version = 0x10007},
> -	.gc = { .id = DPU_DSPP_GC, .base = 0x17c0,
> -		.len = 0x90, .version = 0x10007},
>   };
>   
>   static const struct dpu_dspp_sub_blks sc7180_dspp_sblk = {
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
> index 71584cd56fd7..e0dcef04bc61 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
> @@ -127,12 +127,10 @@ enum {
>   /**
>    * DSPP sub-blocks
>    * @DPU_DSPP_PCC             Panel color correction block
> - * @DPU_DSPP_GC              Gamma correction block
>    * @DPU_DSPP_IGC             Inverse gamma correction block
>    */
>   enum {
>   	DPU_DSPP_PCC = 0x1,
> -	DPU_DSPP_GC,
>   	DPU_DSPP_IGC,
>   	DPU_DSPP_MAX
>   };
> @@ -433,22 +431,18 @@ struct dpu_sspp_sub_blks {
>    * @maxwidth:               Max pixel width supported by this mixer
>    * @maxblendstages:         Max number of blend-stages supported
>    * @blendstage_base:        Blend-stage register base offset
> - * @gc: gamma correction block
>    */
>   struct dpu_lm_sub_blks {
>   	u32 maxwidth;
>   	u32 maxblendstages;
>   	u32 blendstage_base[MAX_BLOCKS];
> -	struct dpu_pp_blk gc;
>   };
>   
>   /**
>    * struct dpu_dspp_sub_blks: Information of DSPP block
> - * @gc : gamma correction block
>    * @pcc: pixel color correction block
>    */
>   struct dpu_dspp_sub_blks {
> -	struct dpu_pp_blk gc;
>   	struct dpu_pp_blk pcc;
>   };
>   

-- 
With best wishes
Dmitry