linux-kernel - [PATCH 5.15 027/917] media: rkvdec: Do not override sizeimage for output format

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Date:   Mon, 15 Nov 2021 17:52:02 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Chen-Yu Tsai <wenst@...omium.org>,
        Nicolas Dufresne <nicolas.dufresne@...labora.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Subject: [PATCH 5.15 027/917] media: rkvdec: Do not override sizeimage for output format

From: Chen-Yu Tsai <wenst@...omium.org>

commit 298d8e8f7bcf023aceb60232d59b983255fec0df upstream.

The rkvdec H.264 decoder currently overrides sizeimage for the output
format. This causes issues when userspace requires and requests a larger
buffer, but ends up with one of insufficient size.

Instead, only provide a default size if none was requested. This fixes
the video_decode_accelerator_tests from Chromium failing on the first
frame due to insufficient buffer space. It also aligns the behavior
of the rkvdec driver with the Hantro and Cedrus drivers.

Fixes: cd33c830448b ("media: rkvdec: Add the rkvdec driver")
Cc: <stable@...r.kernel.org>
Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/staging/media/rkvdec/rkvdec-h264.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/staging/media/rkvdec/rkvdec-h264.c
+++ b/drivers/staging/media/rkvdec/rkvdec-h264.c
@@ -1015,8 +1015,9 @@ static int rkvdec_h264_adjust_fmt(struct
 	struct v4l2_pix_format_mplane *fmt = &f->fmt.pix_mp;
 
 	fmt->num_planes = 1;
-	fmt->plane_fmt[0].sizeimage = fmt->width * fmt->height *
-				      RKVDEC_H264_MAX_DEPTH_IN_BYTES;
+	if (!fmt->plane_fmt[0].sizeimage)
+		fmt->plane_fmt[0].sizeimage = fmt->width * fmt->height *
+					      RKVDEC_H264_MAX_DEPTH_IN_BYTES;
 	return 0;
 }