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| author | Ezequiel Garcia <ezequiel@collabora.com> | 2020-07-09 18:36:34 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-07-19 13:26:25 +0200 |
| commit | 9363aa33f6a9acfd16f98c749f17f6c65d184670 (patch) | |
| tree | 7b507ba0a6822001aab837777e491eebdb525f66 /drivers | |
| parent | 46d7aaebbe441d5381e35d8e16df784690e65ef3 (diff) | |
| download | linux-9363aa33f6a9acfd16f98c749f17f6c65d184670.tar.bz2 | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/media/rkvdec/rkvdec.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/staging/media/rkvdec/rkvdec.c b/drivers/staging/media/rkvdec/rkvdec.c index fd68671f0286..c8151328fb70 100644 --- a/drivers/staging/media/rkvdec/rkvdec.c +++ b/drivers/staging/media/rkvdec/rkvdec.c @@ -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, |