linux-kernel - Re: [PATCH v2,3/5] media: mediatek: vcodec: add MM21 format definition

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Date: Thu, 18 Apr 2024 16:20:44 -0400
From: Nicolas Dufresne <nicolas.dufresne@...labora.com>
To: Yunfei Dong <yunfei.dong@...iatek.com>, Nícolas "F .
 R . A . Prado" <nfraprado@...labora.com>, Hans Verkuil
 <hverkuil-cisco@...all.nl>, AngeloGioacchino Del Regno
 <angelogioacchino.delregno@...labora.com>, Benjamin Gaignard
 <benjamin.gaignard@...labora.com>, Nathan Hebert <nhebert@...omium.org>, 
 Sebastian Fricke <sebastian.fricke@...labora.com>
Cc: Hsin-Yi Wang <hsinyi@...omium.org>, Fritz Koenig
 <frkoenig@...omium.org>,  Daniel Vetter <daniel@...ll.ch>, Steve Cho
 <stevecho@...omium.org>, linux-media@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
 Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v2,3/5] media: mediatek: vcodec: add MM21 format
 definition

Le mardi 09 avril 2024 à 14:44 +0800, Yunfei Dong a écrit :
> Adding the definition of MM21 format to calculate bytesperline
> and sizeimage of plane[0] and plane[1].
> 
> Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
> ---
>  drivers/media/v4l2-core/v4l2-common.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
> index cef1492dba22..0d5de132e07f 100644
> --- a/drivers/media/v4l2-core/v4l2-common.c
> +++ b/drivers/media/v4l2-core/v4l2-common.c
> @@ -269,6 +269,8 @@ const struct v4l2_format_info *v4l2_format_info(u32 format)
>  		  .block_w = { 64, 64, 0, 0 }, .block_h = { 64, 64, 0, 0 }},
>  		{ .format = V4L2_PIX_FMT_MT2110R, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 5, 5, 0, 0 }, .bpp_div = { 4, 4, 1, 1 }, .hdiv = 1, .vdiv = 2,
>  		  .block_w = { 64, 64, 0, 0 }, .block_h = { 64, 64, 0, 0 }},
> +		{ .format = V4L2_PIX_FMT_MM21, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 1, 0, 0 }, .bpp_div = { 1, 1, 1, 1 }, .hdiv = 1, .vdiv = 2,
> +		  .block_w = { 64, 64, 0, 0 }, .block_h = { 64, 64, 0, 0 }},

MM21 has the same subsampling as NV12M, so hdiv should be 2 for correctness The
64x64 block is incorrect. The only difference between this and NV12M should be
with block.

>  
>  		/* YUV planar formats */
>  		{ .format = V4L2_PIX_FMT_NV12,    .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 },