linux-kernel - Re: [PATCH 15/16] drm/msm/dpu: add NV12 in the list of supported WB formats

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Date:   Wed, 6 Dec 2023 17:09:43 -0800
From:   Abhinav Kumar <quic_abhinavk@...cinc.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC:     <freedreno@...ts.freedesktop.org>, Rob Clark <robdclark@...il.com>,
        "Sean Paul" <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        "David Airlie" <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        <dri-devel@...ts.freedesktop.org>, <quic_jesszhan@...cinc.com>,
        <quic_parellan@...cinc.com>, <quic_khsieh@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 15/16] drm/msm/dpu: add NV12 in the list of supported WB
 formats



On 8/30/2023 5:26 PM, Dmitry Baryshkov wrote:
> On Thu, 31 Aug 2023 at 01:50, Abhinav Kumar <quic_abhinavk@...cinc.com> wrote:
>>
>> Since CDM block support has now been added for writeback blocks
>> add NV12 in the list of supported WB formats.
>>
>> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
>> ---
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> 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 713dfc079718..978330c6678e 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
>> @@ -244,6 +244,7 @@ static const uint32_t wb2_formats[] = {
>>          DRM_FORMAT_BGRA4444,
>>          DRM_FORMAT_BGRX4444,
>>          DRM_FORMAT_XBGR4444,
>> +       DRM_FORMAT_NV12,
>>   };
> 
> No. This way the driver would announce availability of NV12 even on
> chipsets where NV12 is not supported for the writeback. Please define
> separate formats array.
> 
> BTW: does HW only support NV12 for the writeback? What about YV12 or e.g. NV21?
> 

Yes, as we discussed in the prev patch, I will split the wb2_formats 
array to RGB only and RGB+YUV to address this issue.

Regarding the full list of supported formats, here it is:

https://git.codelinaro.org/clo/la/platform/vendor/opensource/display-drivers/-/blob/clo/main/msm/sde/sde_hw_catalog_format.h?ref_type=heads#L107

But YUV420 shouldnt be here as its not supported.

I have to see if I can add some test cases in IGT to validate NV16 and 
DRM_FORMAT_YUYV. Hence I only exposed this one for now.

>>
>>   /*************************************************************
>> --
>> 2.40.1
>>
> 
>