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media: mt9m111: add s_stream callback

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Add callback to check if we are already streaming. Now other callbacks
can check the state and return -EBUSY if we already streaming.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Marco Felsch 2018-11-27 05:02:48 -05:00 committed by Mauro Carvalho Chehab
parent 4f9d7225c7
commit 7784b1d278
1 changed files with 10 additions and 0 deletions
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10
drivers/media/i2c/mt9m111.c
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@ -220,6 +220,7 @@ struct mt9m111 {
int power_count;
const struct mt9m111_datafmt *fmt;
int lastpage; /* PageMap cache value */
bool is_streaming;
#ifdef CONFIG_MEDIA_CONTROLLER
struct media_pad pad;
#endif
@ -910,6 +911,14 @@ static int mt9m111_enum_mbus_code(struct v4l2_subdev *sd,
return 0;
}
static int mt9m111_s_stream(struct v4l2_subdev *sd, int enable)
{
struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
mt9m111->is_streaming = !!enable;
return 0;
}
static int mt9m111_g_mbus_config(struct v4l2_subdev *sd,
struct v4l2_mbus_config *cfg)
{
@ -923,6 +932,7 @@ static int mt9m111_g_mbus_config(struct v4l2_subdev *sd,
static const struct v4l2_subdev_video_ops mt9m111_subdev_video_ops = {
.g_mbus_config = mt9m111_g_mbus_config,
.s_stream = mt9m111_s_stream,
};
static const struct v4l2_subdev_pad_ops mt9m111_subdev_pad_ops = {