[PATCH] drm/fourcc: Add formats for packed YUV 4:4:4 AVUY and XVUY permutations

[Daniel Vetter]

On Thu, Jun 16, 2022 at 09:52:10PM +0300, Laurent Pinchart wrote:
> Add FourCCs for two missing permutations of the packed YUV 4:4:4 color

For a second I thought this 4:4:4 is the bit packing, but it's the 444
sampling rate thing.

Man formats are confusing.

> components, namely AVUY and XVUY.
> 
> These formats are needed by the NXP i.MX8 ISI. While the ISI is
> supported by a V4L2 device (corresponding formats have been submitted to
> V4L2), it is handled in userspace by libcamera, which uses DRM FourCCs
> for pixel formats.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> ---
>  include/uapi/drm/drm_fourcc.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> index f1972154a594..399d950c53e3 100644
> --- a/include/uapi/drm/drm_fourcc.h
> +++ b/include/uapi/drm/drm_fourcc.h
> @@ -205,7 +205,9 @@ extern "C" {

I build script to make sure we don't accidentally assign duplicated codes
would be nice, this is pain to check.

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

>  #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_AVUY8888	fourcc_code('A', 'V', 'U', 'Y') /* [31:0] A:Cr:Cb:Y 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_XVUY8888	fourcc_code('X', 'V', 'U', 'Y') /* [31:0] X:Cr:Cb:Y 8:8:8:8 little endian */
>  #define DRM_FORMAT_VUY888	fourcc_code('V', 'U', '2', '4') /* [23:0] Cr:Cb:Y 8:8:8 little endian */
>  #define DRM_FORMAT_VUY101010	fourcc_code('V', 'U', '3', '0') /* Y followed by U then V, 10:10:10. Non-linear modifier only */
>  
> -- 
> Regards,
> 
> Laurent Pinchart
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch