#include <linux/module.h>
-#include <linux/moduleparam.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/init.h>
/* Map the control ID to the correct field in the cx2341x_mpeg_params
struct. Return -EINVAL if the ID is unknown, else return 0. */
-static int cx2341x_set_ctrl(struct cx2341x_mpeg_params *params,
+static int cx2341x_set_ctrl(struct cx2341x_mpeg_params *params, int busy,
struct v4l2_ext_control *ctrl)
{
switch (ctrl->id) {
case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
+ if (busy)
+ return -EBUSY;
params->audio_sampling_freq = ctrl->value;
break;
case V4L2_CID_MPEG_AUDIO_ENCODING:
params->audio_encoding = ctrl->value;
break;
case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
+ if (busy)
+ return -EBUSY;
params->audio_l2_bitrate = ctrl->value;
break;
case V4L2_CID_MPEG_AUDIO_MODE:
params->video_gop_closure = ctrl->value;
break;
case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
+ if (busy)
+ return -EBUSY;
/* MPEG-1 only allows CBR */
if (params->video_encoding == V4L2_MPEG_VIDEO_ENCODING_MPEG_1 &&
ctrl->value != V4L2_MPEG_VIDEO_BITRATE_MODE_CBR)
params->video_bitrate_mode = ctrl->value;
break;
case V4L2_CID_MPEG_VIDEO_BITRATE:
+ if (busy)
+ return -EBUSY;
params->video_bitrate = ctrl->value;
break;
case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
+ if (busy)
+ return -EBUSY;
params->video_bitrate_peak = ctrl->value;
break;
case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION:
params->video_mute_yuv = ctrl->value;
break;
case V4L2_CID_MPEG_STREAM_TYPE:
+ if (busy)
+ return -EBUSY;
params->stream_type = ctrl->value;
params->video_encoding =
(params->stream_type == V4L2_MPEG_STREAM_TYPE_MPEG1_SS ||
(params->audio_crc << 14);
}
-int cx2341x_ext_ctrls(struct cx2341x_mpeg_params *params,
+int cx2341x_ext_ctrls(struct cx2341x_mpeg_params *params, int busy,
struct v4l2_ext_controls *ctrls, unsigned int cmd)
{
int err = 0;
err = v4l2_ctrl_check(ctrl, &qctrl, menu_items);
if (err)
break;
- err = cx2341x_set_ctrl(params, ctrl);
+ err = cx2341x_set_ctrl(params, busy, ctrl);
if (err)
break;
}