Change s_input, s_fmt, s_tuner, s_frequency, querystd, s_hw_freq_seek, and vb2_core_streamon interfaces that alter the tuner configuration to check if it is free, by calling v4l_enable_media_source(). If source isn't free, return -EBUSY. v4l_disable_media_source() is called from v4l2_fh_exit() to release tuner (source). vb2_core_streamon() uses v4l_vb2q_enable_media_source().
Signed-off-by: Shuah Khan shuahkh@osg.samsung.com --- drivers/media/v4l2-core/v4l2-fh.c | 2 ++ drivers/media/v4l2-core/v4l2-ioctl.c | 30 ++++++++++++++++++++++++++++++ drivers/media/v4l2-core/videobuf2-core.c | 4 ++++ 3 files changed, 36 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-fh.c b/drivers/media/v4l2-core/v4l2-fh.c index c97067a..c183f09 100644 --- a/drivers/media/v4l2-core/v4l2-fh.c +++ b/drivers/media/v4l2-core/v4l2-fh.c @@ -29,6 +29,7 @@ #include <media/v4l2-fh.h> #include <media/v4l2-event.h> #include <media/v4l2-ioctl.h> +#include <media/v4l2-mc.h>
void v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev) { @@ -92,6 +93,7 @@ void v4l2_fh_exit(struct v4l2_fh *fh) { if (fh->vdev == NULL) return; + v4l_disable_media_source(fh->vdev); v4l2_event_unsubscribe_all(fh); fh->vdev = NULL; } diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 8a018c6..ceaa44a 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -27,6 +27,7 @@ #include <media/v4l2-event.h> #include <media/v4l2-device.h> #include <media/videobuf2-v4l2.h> +#include <media/v4l2-mc.h>
#include <trace/events/v4l2.h>
@@ -1041,6 +1042,12 @@ static int v4l_querycap(const struct v4l2_ioctl_ops *ops, static int v4l_s_input(const struct v4l2_ioctl_ops *ops, struct file *file, void *fh, void *arg) { + struct video_device *vfd = video_devdata(file); + int ret; + + ret = v4l_enable_media_source(vfd); + if (ret) + return ret; return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); }
@@ -1448,6 +1455,9 @@ static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, bool is_tx = vfd->vfl_dir != VFL_DIR_RX; int ret;
+ ret = v4l_enable_media_source(vfd); + if (ret) + return ret; v4l_sanitize_format(p);
switch (p->type) { @@ -1637,7 +1647,11 @@ static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, { struct video_device *vfd = video_devdata(file); struct v4l2_tuner *p = arg; + int ret;
+ ret = v4l_enable_media_source(vfd); + if (ret) + return ret; p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; return ops->vidioc_s_tuner(file, fh, p); @@ -1691,7 +1705,11 @@ static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, struct video_device *vfd = video_devdata(file); const struct v4l2_frequency *p = arg; enum v4l2_tuner_type type; + int ret;
+ ret = v4l_enable_media_source(vfd); + if (ret) + return ret; if (vfd->vfl_type == VFL_TYPE_SDR) { if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) return -EINVAL; @@ -1746,7 +1764,11 @@ static int v4l_s_std(const struct v4l2_ioctl_ops *ops, { struct video_device *vfd = video_devdata(file); v4l2_std_id id = *(v4l2_std_id *)arg, norm; + int ret;
+ ret = v4l_enable_media_source(vfd); + if (ret) + return ret; norm = id & vfd->tvnorms; if (vfd->tvnorms && !norm) /* Check if std is supported */ return -EINVAL; @@ -1760,7 +1782,11 @@ static int v4l_querystd(const struct v4l2_ioctl_ops *ops, { struct video_device *vfd = video_devdata(file); v4l2_std_id *p = arg; + int ret;
+ ret = v4l_enable_media_source(vfd); + if (ret) + return ret; /* * If no signal is detected, then the driver should return * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with @@ -1779,7 +1805,11 @@ static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, struct video_device *vfd = video_devdata(file); struct v4l2_hw_freq_seek *p = arg; enum v4l2_tuner_type type; + int ret;
+ ret = v4l_enable_media_source(vfd); + if (ret) + return ret; /* s_hw_freq_seek is not supported for SDR for now */ if (vfd->vfl_type == VFL_TYPE_SDR) return -EINVAL; diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c index ec5b78e..d381478 100644 --- a/drivers/media/v4l2-core/videobuf2-core.c +++ b/drivers/media/v4l2-core/videobuf2-core.c @@ -25,6 +25,7 @@ #include <linux/kthread.h>
#include <media/videobuf2-core.h> +#include <media/v4l2-mc.h>
#include <trace/events/vb2.h>
@@ -1873,6 +1874,9 @@ int vb2_core_streamon(struct vb2_queue *q, unsigned int type) * are available. */ if (q->queued_count >= q->min_buffers_needed) { + ret = v4l_vb2q_enable_media_source(q); + if (ret) + return ret; ret = vb2_start_streaming(q); if (ret) { __vb2_queue_cancel(q);