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Date:   Fri, 08 Feb 2019 22:11:17 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Ayan Halder <Ayan.Halder@....com>, Randy Li <ayaka@...lik.info>,
        "airlied@...ux.ie" <airlied@...ux.ie>, nd <nd@....com>,
        "mchehab+samsung@...nel.org" <mchehab+samsung@...nel.org>,
        "maxime.ripard@...tlin.com" <maxime.ripard@...tlin.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "sakari.ailus@....fi" <sakari.ailus@....fi>,
        "laurent.pinchart@...asonboard.com" 
        <laurent.pinchart@...asonboard.com>,
        "mikhail.v.gavrilov@...il.com" <mikhail.v.gavrilov@...il.com>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "sean@...rly.run" <sean@...rly.run>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>
Subject: Re: [PATCH v10 1/2] drm/fourcc: Add new P010, P016 video format



Le 08/02/2019 16:51, Daniel Vetter a écrit :
> On Thu, Feb 07, 2019 at 10:44:10AM +0100, Neil Armstrong wrote:
>> Hi,
>>
>> On 14/01/2019 17:36, Ayan Halder wrote:
>>> On Thu, Jan 10, 2019 at 03:57:09AM +0800, Randy Li wrote:
>>>> P010 is a planar 4:2:0 YUV with interleaved UV plane, 10 bits per
>>>> channel video format.
>>>>
>>>> P012 is a planar 4:2:0 YUV 12 bits per channel
>>>>
>>>> P016 is a planar 4:2:0 YUV with interleaved UV plane, 16 bits per
>>>> channel video format.
>>>>
>>>> V3: Added P012 and fixed cpp for P010.
>>>> V4: format definition refined per review.
>>>> V5: Format comment block for each new pixel format.
>>>> V6: reversed Cb/Cr order in comments.
>>>> v7: reversed Cb/Cr order in comments of header files, remove
>>>> the wrong part of commit message.
>>>> V8: reversed V7 changes except commit message and rebased.
>>>> v9: used the new properties to describe those format and
>>>> rebased.
>>>>
>>>> Cc: Daniel Stone <daniel@...ishbar.org>
>>>> Cc: Ville Syrj??l?? <ville.syrjala@...ux.intel.com>
>>>>
>>>> Signed-off-by: Randy Li <ayaka@...lik.info>
>>>> Signed-off-by: Clint Taylor <clinton.a.taylor@...el.com>
>>>> ---
>>>>  drivers/gpu/drm/drm_fourcc.c  |  9 +++++++++
>>>>  include/uapi/drm/drm_fourcc.h | 21 +++++++++++++++++++++
>>>>  2 files changed, 30 insertions(+)
>>>>
>>>> diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
>>>> index d90ee03a84c6..ba7e19d4336c 100644
>>>> --- a/drivers/gpu/drm/drm_fourcc.c
>>>> +++ b/drivers/gpu/drm/drm_fourcc.c
>>>> @@ -238,6 +238,15 @@ const struct drm_format_info *__drm_format_info(u32 format)
>>>>  		{ .format = DRM_FORMAT_X0L2,		.depth = 0,  .num_planes = 1,
>>>>  		  .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
>>>>  		  .hsub = 2, .vsub = 2, .is_yuv = true },
>>>> +		{ .format = DRM_FORMAT_P010,            .depth = 0,  .num_planes = 2,
>>>> +		  .char_per_block = { 2, 4, 0 }, .block_w = { 1, 0, 0 }, .block_h = { 1, 0, 0 },
>>>> +		  .hsub = 2, .vsub = 2, .is_yuv = true},
>>>> +		{ .format = DRM_FORMAT_P012,		.depth = 0,  .num_planes = 2,
>>>> +		  .char_per_block = { 2, 4, 0 }, .block_w = { 1, 0, 0 }, .block_h = { 1, 0, 0 },
>>>> +		   .hsub = 2, .vsub = 2, .is_yuv = true},
>>>> +		{ .format = DRM_FORMAT_P016,		.depth = 0,  .num_planes = 2,
>>>> +		  .char_per_block = { 2, 4, 0 }, .block_w = { 1, 0, 0 }, .block_h = { 1, 0, 0 },
>>>> +		  .hsub = 2, .vsub = 2, .is_yuv = true},
>>>>  	};
>>>>  
>>>>  	unsigned int i;
>>>> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
>>>> index 0b44260a5ee9..8dd1328bc8d6 100644
>>>> --- a/include/uapi/drm/drm_fourcc.h
>>>> +++ b/include/uapi/drm/drm_fourcc.h
>>>> @@ -195,6 +195,27 @@ extern "C" {
>>>>  #define DRM_FORMAT_NV24		fourcc_code('N', 'V', '2', '4') /* non-subsampled Cr:Cb plane */
>>>>  #define DRM_FORMAT_NV42		fourcc_code('N', 'V', '4', '2') /* non-subsampled Cb:Cr plane */
>>>>  
>>>> +/*
>>>> + * 2 plane YCbCr MSB aligned
>>>> + * index 0 = Y plane, [15:0] Y:x [10:6] little endian
>>>> + * index 1 = Cr:Cb plane, [31:0] Cr:x:Cb:x [10:6:10:6] little endian
>>>> + */
>>>> +#define DRM_FORMAT_P010		fourcc_code('P', '0', '1', '0') /* 2x2 subsampled Cr:Cb plane 10 bits per channel */
>>>> +
>>>> +/*
>>>> + * 2 plane YCbCr MSB aligned
>>>> + * index 0 = Y plane, [15:0] Y:x [12:4] little endian
>>>> + * index 1 = Cr:Cb plane, [31:0] Cr:x:Cb:x [12:4:12:4] little endian
>>>> + */
>>>> +#define DRM_FORMAT_P012		fourcc_code('P', '0', '1', '2') /* 2x2 subsampled Cr:Cb plane 12 bits per channel */
>>>> +
>>>> +/*
>>>> + * 2 plane YCbCr MSB aligned
>>>> + * index 0 = Y plane, [15:0] Y little endian
>>>> + * index 1 = Cr:Cb plane, [31:0] Cr:Cb [16:16] little endian
>>>> + */
>>>> +#define DRM_FORMAT_P016		fourcc_code('P', '0', '1', '6') /* 2x2 subsampled Cr:Cb plane 16 bits per channel */
>>>> +
>>>
>>> looks good to me.
>>> Reviewed by:- Ayan Kumar Halder <ayan.halder@....com>
>>>
>>> We are using P010 format for our mali display driver. Our AFBC patch
>>> series(https://patchwork.freedesktop.org/series/53395/) is dependent
>>> on this patch. So, that's why I wanted to know when you are planning to
>>> merge this. As far as I remember, Juha wanted to implement some igt
>>> tests
>>> (https://lists.freedesktop.org/archives/intel-gfx/2018-September/174877.html)
>>> , so is that done now?
>>>
>>> My apologies if I am pushing hard on this.
>>
>> Looks good to me aswell,
>>
>> Reviewed by: Neil Armstrong <narmstrong@...libre.com>
>>
>> Seems we will also need P010 to support the Amlogic Compressed modifier to display
>> compressed frames from the HW decoder.
>>
>> I can apply this to drm-misc-next if everyone is ok
> 
> Matches what's still flaoting around by intel devs:
> 
> https://patchwork.freedesktop.org/patch/284801/
> 
> Except this one uses the new block descriptors and has much neater
> comments.
> 
> Reviewed-by: Daniel Vetter <daniel.vetter@...ll.ch>
> 
> Please push to drm-misc-next asap so intel folks aren't blocked.
> 
> Thanks, Daniel


Applying now, thanks !

Neil

> 
>>
>> Neil
>>
>>>>  /*
>>>>   * 3 plane YCbCr
>>>>   * index 0: Y plane, [7:0] Y
>>>> -- 
>>>> 2.20.1
>>>>
>>>> _______________________________________________
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>>>> https://lists.freedesktop.org/mailman/listinfo/dri-devel
>>> _______________________________________________
>>> dri-devel mailing list
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>>>
>>
>

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