[media] media: Change v4l-core to check if source is free
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>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 1484309..86c4c19 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_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);
}
@@ -1452,6 +1459,9 @@
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) {
@@ -1641,7 +1651,11 @@
{
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);
@@ -1695,7 +1709,11 @@
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;
@@ -1750,7 +1768,11 @@
{
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;
@@ -1764,7 +1786,11 @@
{
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
@@ -1783,7 +1809,11 @@
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;