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    Subject[PATCH 6.0 491/862] media: amphion: adjust the encoders value range of gop size
    Date
    From: Ming Qian <ming.qian@nxp.com>

    [ Upstream commit 996f4e89fabe44ab9ac0aabb0697aeecbe717eca ]

    adjust the value range of gop size from [0, 65535] to [1, 8000].
    when the gop size is set to a too large value,
    it may affect the encoded picture quality.
    so constrain it to a reasonable range.

    Fixes: 0401e659c1f92 ("media: amphion: add v4l2 m2m vpu encoder stateful driver")
    Signed-off-by: Ming Qian <ming.qian@nxp.com>
    Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
    Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/media/platform/amphion/venc.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/media/platform/amphion/venc.c b/drivers/media/platform/amphion/venc.c
    index 461524dd1e44..37212f087fdd 100644
    --- a/drivers/media/platform/amphion/venc.c
    +++ b/drivers/media/platform/amphion/venc.c
    @@ -644,7 +644,7 @@ static int venc_ctrl_init(struct vpu_inst *inst)
    BITRATE_DEFAULT_PEAK);

    v4l2_ctrl_new_std(&inst->ctrl_handler, &venc_ctrl_ops,
    - V4L2_CID_MPEG_VIDEO_GOP_SIZE, 0, (1 << 16) - 1, 1, 30);
    + V4L2_CID_MPEG_VIDEO_GOP_SIZE, 1, 8000, 1, 30);

    v4l2_ctrl_new_std(&inst->ctrl_handler, &venc_ctrl_ops,
    V4L2_CID_MPEG_VIDEO_B_FRAMES, 0, 4, 1, 0);
    --
    2.35.1


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