linux-kernel - Re: [PATCH v2 3/4] drm/msm/dpu: remove GC related code from dpu catalog

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Date:   Thu, 27 Apr 2023 13:20:28 -0700
From:   Abhinav Kumar <quic_abhinavk@...cinc.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        <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 v2 3/4] drm/msm/dpu: remove GC related code from dpu
 catalog



On 4/27/2023 8:57 AM, Dmitry Baryshkov wrote:
> On 26/04/2023 22:22, 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>
>> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
>> Link: 
>> https://lore.kernel.org/r/20230421224721.12738-2-quic_abhinavk@quicinc.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)
>> @@ -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,
> 
> Don't we need to remove this one too (in the previous patch)?

Yes, we should. I thought of it right after sending this. will push a v3 
which fixes it in the prev patch.

> 
>>       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;
>>   };
>