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Message-Id: <8e31384a21e670e6b75dfbc1556f1e597a2184d8.1452105878.git.shuahkh@osg.samsung.com>
Date: Wed, 6 Jan 2016 13:27:03 -0700
From: Shuah Khan <shuahkh@....samsung.com>
To: mchehab@....samsung.com, tiwai@...e.com, clemens@...isch.de,
hans.verkuil@...co.com, laurent.pinchart@...asonboard.com,
sakari.ailus@...ux.intel.com, javier@....samsung.com
Cc: Shuah Khan <shuahkh@....samsung.com>, pawel@...iak.com,
m.szyprowski@...sung.com, kyungmin.park@...sung.com,
perex@...ex.cz, arnd@...db.de, dan.carpenter@...cle.com,
tvboxspy@...il.com, crope@....fi, ruchandani.tina@...il.com,
corbet@....net, chehabrafael@...il.com, k.kozlowski@...sung.com,
stefanr@...6.in-berlin.de, inki.dae@...sung.com,
jh1009.sung@...sung.com, elfring@...rs.sourceforge.net,
prabhakar.csengg@...il.com, sw0312.kim@...sung.com,
p.zabel@...gutronix.de, ricardo.ribalda@...il.com,
labbott@...oraproject.org, pierre-louis.bossart@...ux.intel.com,
ricard.wanderlof@...s.com, julian@...st.de, takamichiho@...il.com,
dominic.sacre@....de, misterpib@...il.com, daniel@...que.org,
gtmkramer@...all.nl, normalperson@...t.net, joe@...po.co.uk,
linuxbugs@...tgam.net, johan@...ud.se,
linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
linux-api@...r.kernel.org, alsa-devel@...a-project.org
Subject: [PATCH 14/31] media: Change v4l-core to check for tuner availability
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 for tuner availability
by calling v4l_enable_media_tuner(). If tuner isn't free,
return -EBUSY. v4l_disable_media_tuner() is called from
v4l2_fh_exit() to release the tuner. vb2_core_streamon()
uses v4l_vb2q_enable_media_tuner().
Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
---
drivers/media/v4l2-core/v4l2-fh.c | 1 +
drivers/media/v4l2-core/v4l2-ioctl.c | 29 +++++++++++++++++++++++++++++
drivers/media/v4l2-core/videobuf2-core.c | 4 ++++
3 files changed, 34 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-fh.c b/drivers/media/v4l2-core/v4l2-fh.c
index c97067a..538db62 100644
--- a/drivers/media/v4l2-core/v4l2-fh.c
+++ b/drivers/media/v4l2-core/v4l2-fh.c
@@ -92,6 +92,7 @@ void v4l2_fh_exit(struct v4l2_fh *fh)
{
if (fh->vdev == NULL)
return;
+ v4l_disable_media_tuner(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..ed7f600 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1041,6 +1041,12 @@ 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_tuner(vfd);
+ if (ret)
+ return ret;
return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
}
@@ -1448,6 +1454,9 @@ 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_tuner(vfd);
+ if (ret)
+ return ret;
v4l_sanitize_format(p);
switch (p->type) {
@@ -1637,7 +1646,11 @@ 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_tuner(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 +1704,11 @@ 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_tuner(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 +1763,11 @@ 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_tuner(vfd);
+ if (ret)
+ return ret;
norm = id & vfd->tvnorms;
if (vfd->tvnorms && !norm) /* Check if std is supported */
return -EINVAL;
@@ -1760,7 +1781,11 @@ 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_tuner(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 +1804,11 @@ 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_tuner(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 33bdd81..c9bbb87 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-dev.h>
#include <trace/events/vb2.h>
@@ -1742,6 +1743,9 @@ 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_tuner(q);
+ if (ret)
+ return ret;
ret = vb2_start_streaming(q);
if (ret) {
__vb2_queue_cancel(q);
--
2.5.0
--
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