V4L/DVB (4200): Disable bitrate_mode when encoding mpeg-1.

MPEG-1 always uses CBR, so make the BITRATE_MODE control inactive.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/media/video/cx2341x.c b/drivers/media/video/cx2341x.c
index 4c457dc6a403..7cd1c4cf5aec 100644
--- a/drivers/media/video/cx2341x.c
+++ b/drivers/media/video/cx2341x.c
@@ -406,6 +406,12 @@ int cx2341x_ctrl_query(struct cx2341x_mpeg_params *params, struct v4l2_queryctrl
                         qctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
                 return err;
 
+        case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
+                err = v4l2_ctrl_query_fill_std(qctrl);
+                if (err == 0 && params->video_encoding == V4L2_MPEG_VIDEO_ENCODING_MPEG_1)
+                        qctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
+                return err;
+
         case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
                 err = v4l2_ctrl_query_fill_std(qctrl);
                 if (err == 0 && params->video_bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_CBR)