Re: [PATCH 1/4] drm: Add P010, P012, P016 format definitions and fourcc

["Juha-Pekka Heikkilä" <juhapekka.heikkila@gmail.com>]

Alexandru-Cosmin Gheorghe kirjoitti 3.10.2018 klo 20.18:
> On Wed, Oct 03, 2018 at 02:31:08PM +0300, Juha-Pekka Heikkila wrote:
>> Hi Alex,
>>
>> For my patches there seems limited interest to get them merged before IGT
>> support these modes..I'm not holding my breath for this.
> 
> I'm interested if that counts.
> 
> I asked the same question on the DRM_FORMAT_XYUV thread, do we need to
> wait for userspace to get new fourcc merged.

I'd say yes. Why would otherwise clutter headers which affect what other 
guys are doing for different drivers?

If it makes any difference for you I made KMS video output plug-in for 
VLC media player as part of my enablement of P01x formats. My plug-in 
didn't make it to any VLC release yet but you can find it in VLC master 
branch. Through my plug-in you can ask any fourcc for setting up KMS 
planes, then you'll need to find which VLC fourcc matches your KMS plane 
and tell VLC about it on commandline. If you have driver implementation 
of P010 format which I saw earlier in your patch you can compile VLC 
with P010 included in DRM headers and then you'll be able to watch 
videos using your new format. For P01x formats recompile is needed as 
their setup is different from other formats, packed formats should work 
without anything special.

/Juha-Pekka

> 
>>
>> https://lists.freedesktop.org/archives/intel-gfx/2018-September/174877.html
>>
>> /Juha-Pekka
>>
>> On 02.10.2018 18:00, Alexandru-Cosmin Gheorghe wrote:
>>> Hi,
>>>
>>> How is this going on, anything holding it back from getting merged ?
>>> I'm interested in adding/using P010, [1]
>>>
>>> Thank you,
>>> Alex Gheorghe
>>>
>>> [1] https://lists.freedesktop.org/archives/dri-devel/2018-August/186963.html
>>>
>>> On Thu, Aug 30, 2018 at 03:41:11PM +0300, Juha-Pekka Heikkila wrote:
>>>> Add P010 definition, semi-planar yuv format where each component
>>>> is 16 bits 10 msb containing color value. First come Y plane [10:6]
>>>> followed by 2x2 subsampled Cr:Cb plane [10:6:10:6]
>>>>
>>>> Add P012 definition, semi-planar yuv format where each component
>>>> is 16 bits 12 msb containing color value. First come Y plane [12:4]
>>>> followed by 2x2 subsampled Cr:Cb plane [12:4:12:4]
>>>>
>>>> Add P016 definition, semi-planar yuv format where each component
>>>> is 16 bits. First come Y plane followed by 2x2 subsampled Cr:Cb
>>>> plane [16:16]
>>>>
>>>> Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
>>>> ---
>>>>   drivers/gpu/drm/drm_fourcc.c  |  3 +++
>>>>   include/uapi/drm/drm_fourcc.h | 10 ++++++++++
>>>>   2 files changed, 13 insertions(+)
>>>>
>>>> diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
>>>> index 35c1e27..32e07a2 100644
>>>> --- a/drivers/gpu/drm/drm_fourcc.c
>>>> +++ b/drivers/gpu/drm/drm_fourcc.c
>>>> @@ -173,6 +173,9 @@ const struct drm_format_info *__drm_format_info(u32 format)
>>>>   		{ .format = DRM_FORMAT_UYVY,		.depth = 0,  .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
>>>>   		{ .format = DRM_FORMAT_VYUY,		.depth = 0,  .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
>>>>   		{ .format = DRM_FORMAT_AYUV,		.depth = 0,  .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true },
>>>> +		{ .format = DRM_FORMAT_P010,		.depth = 0,  .num_planes = 2, .cpp = { 2, 4, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true  },
>>>> +		{ .format = DRM_FORMAT_P012,		.depth = 0,  .num_planes = 2, .cpp = { 2, 4, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true  },
>>>> +		{ .format = DRM_FORMAT_P016,		.depth = 0,  .num_planes = 2, .cpp = { 2, 4, 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 2ed46e9..daaabb1 100644
>>>> --- a/include/uapi/drm/drm_fourcc.h
>>>> +++ b/include/uapi/drm/drm_fourcc.h
>>>> @@ -178,6 +178,16 @@ extern "C" {
>>>>   #define DRM_FORMAT_NV42		fourcc_code('N', 'V', '4', '2') /* non-subsampled Cb:Cr plane */
>>>>   /*
>>>> + * 2 plane YCbCr
>>>> + * index 0 = Y plane, [15:0] Y little endian where Pxxx indicate
>>>> + * component xxx msb Y [xxx:16-xxx]
>>>> + * index 1 = Cr:Cb plane, [31:0] Cr:Cb little endian [xxx:16-xxx:xxx:16-xxx]
>>>> + */
>>>> +#define DRM_FORMAT_P010		fourcc_code('P', '0', '1', '0') /* 2x2 subsampled Cr:Cb plane, 10 bit per channel */
>>>> +#define DRM_FORMAT_P012		fourcc_code('P', '0', '1', '2') /* 2x2 subsampled Cr:Cb plane, 12 bit per channel */
>>>> +#define DRM_FORMAT_P016		fourcc_code('P', '0', '1', '6') /* 2x2 subsampled Cr:Cb plane, 16 bit per channel */
>>>> +
>>>> +/*
>>>>    * 3 plane YCbCr
>>>>    * index 0: Y plane, [7:0] Y
>>>>    * index 1: Cb plane, [7:0] Cb
>>>> -- 
>>>> 2.7.4
>>>>
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>>>
> 
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