Subject: Re: [PATCH 06/16] media: v4l2-common: Add missing tiled format info block sizes

From: Nicolas Dufresne <[email-masked]>
Date: Tue, 19 May 2026 11:18:28 -0400

Le lundi 18 mai 2026 à 12:24 +0200, Paul Kocialkowski a écrit :
> Some YUV420 tiled format info definitions are missing block sizes.
> Add the missing block sizes (they are all 4x4).
> 
> Signed-off-by: Paul Kocialkowski <[email-masked]>
> ---
>  drivers/media/v4l2-core/v4l2-common.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
> index 77a0daa92c2b..e142d40c71b9 100644
> --- a/drivers/media/v4l2-core/v4l2-common.c
> +++ b/drivers/media/v4l2-core/v4l2-common.c
> @@ -307,10 +307,12 @@ const struct v4l2_format_info *v4l2_format_info(u32 format)
>  		{ .format = V4L2_PIX_FMT_GREY,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 1 },
>  
>  		/* Tiled YUV formats */
> -		{ .format = V4L2_PIX_FMT_NV12_4L4, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 },
> +		{ .format = V4L2_PIX_FMT_NV12_4L4, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2,
> +		  .block_w = { 4, 4, 0, 0 }, .block_h = { 4, 4, 0, 0 }},

.block_w = { 4, 2, 0, 0 }, .block_h = { 4, 4, 0, 0 }},

>  		{ .format = V4L2_PIX_FMT_NV15_4L4, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 5, 10, 0, 0 }, .bpp_div = { 4, 4, 1, 1 }, .hdiv = 2, .vdiv = 2,
>  		  .block_w = { 4, 4, 0, 0 }, .block_h = { 4, 4, 0, 0 }},
> -		{ .format = V4L2_PIX_FMT_P010_4L4, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 2, 4, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 },
> +		{ .format = V4L2_PIX_FMT_P010_4L4, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 2, 4, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2,
> +		  .block_w = { 4, 4, 0, 0 }, .block_h = { 4, 4, 0, 0 }},

.block_w = { 4, 2, 0, 0 }, .block_h = { 4, 4, 0, 0 }},

This one is speecial, this format does not exists. I believe Jernej made that
one based on assumptions, the actual HW should produce NV15 4L4, but I don't own
that hardware, and so I never managed remove that last "user" of it, which is I
believe H6 VP9 decoder.

Nicolas

>  
>  		/* YUV planar formats, non contiguous variant */
>  		{ .format = V4L2_PIX_FMT_YUV420M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 2, .vdiv = 2 },