linux-kernel - Re: [PATCH 04/16] drm/msm/dpu: add cdm blocks to sc7280 dpu_hw

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Date:   Thu, 30 Nov 2023 14:41:16 -0800
From:   Abhinav Kumar <quic_abhinavk@...cinc.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC:     <freedreno@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <quic_khsieh@...cinc.com>, <quic_parellan@...cinc.com>,
        <quic_jesszhan@...cinc.com>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Sean Paul <sean@...rly.run>
Subject: Re: [PATCH 04/16] drm/msm/dpu: add cdm blocks to sc7280
 dpu_hw_catalog



On 8/30/2023 3:57 PM, Dmitry Baryshkov wrote:
> On Thu, 31 Aug 2023 at 01:49, Abhinav Kumar <quic_abhinavk@...cinc.com> wrote:
>>
>> Add CDM blocks to the sc7280 dpu_hw_catalog to support
>> YUV format output from writeback block.
>>
>> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
>> ---
>>   .../gpu/drm/msm/disp/dpu1/catalog/dpu_7_2_sc7280.h  |  9 +++++++++
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h      | 13 +++++++++++++
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h         |  5 +++++
>>   3 files changed, 27 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_7_2_sc7280.h b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_7_2_sc7280.h
>> index 3b5061c4402a..5252170f216d 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_7_2_sc7280.h
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_7_2_sc7280.h
>> @@ -251,10 +251,19 @@ static const struct dpu_mdss_version sc7280_mdss_ver = {
>>          .core_minor_ver = 2,
>>   };
>>
>> +static const struct dpu_cdm_cfg sc7280_cdm = {
>> +       .name = "cdm_0",
>> +       .id = CDM_0,
>> +       .len = 0x228,
>> +       .base = 0x79200,
>> +       .features = 0,
> 
> No need to.
> Also, as the CDM block seems to be common to all existing platforms,
> what about moving this definition to dpu_hw_catalog.c next to VBIF
> settings?
> 

Thanks for the feedback and sorry for the delay in getting back to this 
feature.

Ack. Yes lets move it to dpu_hw_catalog.c and remove explicit 0 
assignment for features.

>> +};
>> +
>>   const struct dpu_mdss_cfg dpu_sc7280_cfg = {
>>          .mdss_ver = &sc7280_mdss_ver,
>>          .caps = &sc7280_dpu_caps,
>>          .mdp = &sc7280_mdp,
>> +       .cdm = &sc7280_cdm,
>>          .ctl_count = ARRAY_SIZE(sc7280_ctl),
>>          .ctl = sc7280_ctl,
>>          .sspp_count = ARRAY_SIZE(sc7280_sspp),
>> 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 6c9634209e9f..4ea7c3f85a95 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
>> @@ -693,6 +693,17 @@ struct dpu_vbif_cfg {
>>          u32 memtype[MAX_XIN_COUNT];
>>   };
>>
>> +/**
>> + * struct dpu_cdm_cfg - information of chroma down blocks
>> + * @name               string name for debug purposes
>> + * @id                 enum identifying this block
>> + * @base               register offset of this block
>> + * @features           bit mask identifying sub-blocks/features
>> + */
>> +struct dpu_cdm_cfg {
>> +       DPU_HW_BLK_INFO;
>> +};
>> +
>>   /**
>>    * Define CDP use cases
>>    * @DPU_PERF_CDP_UDAGE_RT: real-time use cases
>> @@ -816,6 +827,8 @@ struct dpu_mdss_cfg {
>>          u32 wb_count;
>>          const struct dpu_wb_cfg *wb;
>>
>> +       const struct dpu_cdm_cfg *cdm;
>> +
>>          u32 ad_count;
>>
>>          u32 dspp_count;
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h
>> index d85157acfbf8..4d6dba18caf0 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h
>> @@ -185,6 +185,11 @@ enum dpu_dsc {
>>          DSC_MAX
>>   };
>>
>> +enum dpu_cdm {
>> +       CDM_0 = 1,
>> +       CDM_MAX
>> +};
>> +
>>   enum dpu_pingpong {
>>          PINGPONG_NONE,
>>          PINGPONG_0,
>> --
>> 2.40.1
>>
> 
>