[Intel-gfx] [PATCH 1/3] drm: Add Y2xx and Y4xx (xx:10/12/16) format definitions and fourcc

[Sharma, Swati2]

On 11-Jan-19 6:17 PM, Juha-Pekka Heikkila wrote:
> On 11.1.2019 7.30, swati2.sharma at intel.com wrote:
>> From: Swati Sharma <swati2.sharma at intel.com>
>>
>> The following pixel formats are packed format that follows 4:2:2
>> chroma sampling. For memory represenation each component is
>> allocated 16 bits each. Thus each pixel occupies 32bit.
>>
>> Y210:    For each component, valid data occupies MSB 10 bits.
>>     LSB 6 bits are filled with zeroes.
>> Y212:    For each component, valid data occupies MSB 12 bits.
>>     LSB 4 bits are filled with zeroes.
>> Y216:    For each component valid data occupies 16 bits,
>>     doesn't require any padding bits.
>>
>> First 16 bits stores the Y value and the next 16 bits stores one
>> of the chroma samples alternatively. The first luma sample will
>> be accompanied by first U sample and second luma sample is
>> accompanied by the first V sample.
>>
>> The following pixel formats are packed format that follows 4:4:4
>> chroma sampling. Channels are arranged in the order UYVA in
>> increasing memory order.
>>
>> Y410:    Each color component occupies 10 bits and X component
>>     takes 2 bits, thus each pixel occupies 32 bits.
>> Y412:   Each color component is 16 bits where valid data
>>     occupies MSB 12 bits. LSB 4 bits are filled with zeroes.
>>     Thus, each pixel occupies 64 bits.
>> Y416:   Each color component occupies 16 bits for valid data,
>>     doesn't require any padding bits. Thus, each pixel
>>     occupies 64 bits.
>>
>> Signed-off-by: Swati Sharma <swati2.sharma at intel.com>
>> ---
>>   drivers/gpu/drm/drm_fourcc.c  |  6 ++++++
>>   include/uapi/drm/drm_fourcc.h | 18 +++++++++++++++++-
>>   2 files changed, 23 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
>> index d90ee03..639ab93 100644
>> --- a/drivers/gpu/drm/drm_fourcc.c
>> +++ b/drivers/gpu/drm/drm_fourcc.c
>> @@ -226,6 +226,12 @@ const struct drm_format_info 
>> *__drm_format_info(u32 format)
>>           { .format = DRM_FORMAT_VYUY,        .depth = 0, .num_planes 
>> = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
>>           { .format = DRM_FORMAT_XYUV8888,    .depth = 0, .num_planes 
>> = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .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_Y210,            .depth = 0, 
>> .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = 
>> true },
>> +        { .format = DRM_FORMAT_Y212,            .depth = 0, 
>> .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = 
>> true },
>> +        { .format = DRM_FORMAT_Y216,            .depth = 0, 
>> .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = 
>> true },
>> +        { .format = DRM_FORMAT_Y410,            .depth = 0, 
>> .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = 
>> true },
>> +        { .format = DRM_FORMAT_Y412,            .depth = 0, 
>> .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = 
>> true },
>> +        { .format = DRM_FORMAT_Y416,            .depth = 0, 
>> .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = 
>> true },
>>           { .format = DRM_FORMAT_Y0L0,        .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, .has_alpha = true, .is_yuv = true },
>> diff --git a/include/uapi/drm/drm_fourcc.h 
>> b/include/uapi/drm/drm_fourcc.h
>> index 0b44260..97249a5 100644
>> --- a/include/uapi/drm/drm_fourcc.h
>> +++ b/include/uapi/drm/drm_fourcc.h
>> @@ -151,7 +151,23 @@
>>   #define DRM_FORMAT_VYUY        fourcc_code('V', 'Y', 'U', 'Y') /* 
>> [31:0] Y1:Cb0:Y0:Cr0 8:8:8:8 little endian */
>>     #define DRM_FORMAT_AYUV        fourcc_code('A', 'Y', 'U', 'V') /* 
>> [31:0] A:Y:Cb:Cr 8:8:8:8 little endian */
>> -#define DRM_FORMAT_XYUV8888        fourcc_code('X', 'Y', 'U', 'V') 
>> /* [31:0] X:Y:Cb:Cr 8:8:8:8 little endian */
>> +#define DRM_FORMAT_XYUV8888    fourcc_code('X', 'Y', 'U', 'V') /* 
>> [31:0] X:Y:Cb:Cr 8:8:8:8 little endian */
>> +
>> +/*
>> + * packed Y2xx indicate for each component, xx valid data occupy msb
>> + * 16-xx padding occupy lsb
>> + */
>> +#define DRM_FORMAT_Y210         fourcc_code('Y', '2', '1', '0') /* 
>> [63:0] Y0:x:Cb0:x:Y1:x:Cr1:x 10:6:10:6:10:6:10:6 little endian */
>> +#define DRM_FORMAT_Y212         fourcc_code('Y', '2', '1', '2') /* 
>> [63:0] Y0:x:Cb0:x:Y1:x:Cr1:x 12:4:12:4:12:4:12:4 little endian */
>> +#define DRM_FORMAT_Y216         fourcc_code('Y', '2', '1', '6') /* 
>> [63:0] Y0:Cb0:Y1:Cr1 16:16:16:16 little endian */
>> +
>> +/*
>> + * packed Y4xx indicate for each component, xx valid data occupy msb
>> + * 16-xx padding occupy lsb except Y410
>> + */
>> +#define DRM_FORMAT_Y410         fourcc_code('Y', '4', '1', '0') /* 
>> [31:0] X:V:Y:U 2:10:10:10 little endian */
>> +#define DRM_FORMAT_Y412         fourcc_code('Y', '4', '1', '2') /* 
>> [64:0] X:x:V:x:Y:x:U:x 12:4:12:4:12:4:12:4 little endian */
>> +#define DRM_FORMAT_Y416         fourcc_code('Y', '4', '1', '6') /* 
>> [64:0] X:V:Y:U 16:16:16:16 little endian */
> ^^
> [63:0] maybe?
ohh sorry. Will correct in next patch series.
>
> /Juha-Pekka
>
>>     /*
>>    * packed YCbCr420 2x2 tiled formats
>>
>

-- 
Thanks and Regards,
Swati