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rkvdec: h264: Refuse to decode unsupported bitstream 

The hardware only supports 4:2:2, 4:2:0 or 4:0:0 (monochrome),
8-bit or 10-bit depth content.

Verify that the SPS refers to a supported bitstream, and refuse
unsupported bitstreams by failing at TRY_EXT_CTRLS time.

The driver is currently broken on 10-bit and 4:2:2
so disallow those as well.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Reviewed-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Ezequiel Garcia 2020-07-09 18:36:34 +02:00 committed by Mauro Carvalho Chehab
parent 46d7aaebbe
commit 9363aa33f6
1 changed files with 27 additions and 0 deletions
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27
drivers/staging/media/rkvdec/rkvdec.c
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@ -27,6 +27,32 @@
#include "rkvdec.h"
#include "rkvdec-regs.h"
static int rkvdec_try_ctrl(struct v4l2_ctrl *ctrl)
{
if (ctrl->id == V4L2_CID_MPEG_VIDEO_H264_SPS) {
const struct v4l2_ctrl_h264_sps *sps = ctrl->p_new.p_h264_sps;
/*
* TODO: The hardware supports 10-bit and 4:2:2 profiles,
* but it's currently broken in the driver.
* Reject them for now, until it's fixed.
*/
if (sps->chroma_format_idc > 1)
/* Only 4:0:0 and 4:2:0 are supported */
return -EINVAL;
if (sps->bit_depth_luma_minus8 != sps->bit_depth_chroma_minus8)
/* Luma and chroma bit depth mismatch */
return -EINVAL;
if (sps->bit_depth_luma_minus8 != 0)
/* Only 8-bit is supported */
return -EINVAL;
}
return 0;
}
static const struct v4l2_ctrl_ops rkvdec_ctrl_ops = {
.try_ctrl = rkvdec_try_ctrl,
};
static const struct rkvdec_ctrl_desc rkvdec_h264_ctrl_descs[] = {
{
.per_request = true,
@ -42,6 +68,7 @@ static const struct rkvdec_ctrl_desc rkvdec_h264_ctrl_descs[] = {
.per_request = true,
.mandatory = true,
.cfg.id = V4L2_CID_MPEG_VIDEO_H264_SPS,
.cfg.ops = &rkvdec_ctrl_ops,
},
{
.per_request = true,