Hi Swati,
On Mon, Oct 15, 2018 at 01:39:54PM +0530, SwatiSharma@xxxxxxxxxxxxxxxxxxxxxxxxxx wrote:
Btw, I can't reply to this address.
> From: Vidya Srinivas <vidya.srinivas@xxxxxxxxx>
>
>
> 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: Valid data occupies MSB 10 bits.
> LSB 6 bits are filled with zeroes.
> Y212: Valid data occupies MSB 12 bits.
> LSB 4 bits are filled with zeroes.
> Y216: 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.
>
> v2: is_yuv setted to true (mahesh)
> different order of yuv samples (mahesh): still update from
> hardware team pending
> change in comment (alexandru)
>
> v3: change in patch comment (juha)
> change in fourcc_code comment (juha)
> different order of yuv samples needs to be defined for Y210/
> Y212/Y216 (update from h/w folks): not including in this patch,
> will do in other patch series (if reqd)
>
> Signed-off-by: Swati Sharma <swati2.sharma@xxxxxxxxx>
> Signed-off-by: Vidya Srinivas <vidya.srinivas@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_fourcc.c | 3 +++
> include/uapi/drm/drm_fourcc.h | 8 ++++++++
> 2 files changed, 11 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
> index 90a1c84..667527b 100644
> --- a/drivers/gpu/drm/drm_fourcc.c
> +++ b/drivers/gpu/drm/drm_fourcc.c
> @@ -225,6 +225,9 @@ 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_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 },
I think this should be .cpp {4, 0, 0}, otherwise framebuffer_check
will demand a min pitch(width * cpp) that's greater of what's actually really
required.
I think you should apply the same convetion as for other 422 packed
formats see DRM_FORMAT_UYVY and others.
> };
>
> unsigned int i;
> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> index 139632b..af1c900 100644
> --- a/include/uapi/drm/drm_fourcc.h
> +++ b/include/uapi/drm/drm_fourcc.h
> @@ -153,6 +153,14 @@
> #define DRM_FORMAT_AYUV fourcc_code('A', 'Y', 'U', 'V') /* [31:0] A: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 */
> +
> +/*
> * 2 plane RGB + A
> * index 0 = RGB plane, same format as the corresponding non _A8 format has
> * index 1 = A plane, [7:0] A
> --
> 1.9.1
--
Cheers,
Alex G
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