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path: root/drivers/media/usb/em28xx/em28xx-video.c
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Diffstat (limited to 'drivers/media/usb/em28xx/em28xx-video.c')
-rw-r--r--drivers/media/usb/em28xx/em28xx-video.c116
1 files changed, 46 insertions, 70 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c
index f6b49c98e2c9..90dec2955f1c 100644
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -1227,8 +1227,7 @@ static void scale_to_size(struct em28xx *dev,
static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
f->fmt.pix.width = v4l2->width;
@@ -1261,8 +1260,7 @@ static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
unsigned int width = f->fmt.pix.width;
unsigned int height = f->fmt.pix.height;
@@ -1355,8 +1353,7 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
*norm = dev->v4l2->norm;
@@ -1365,8 +1362,7 @@ static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm);
@@ -1375,8 +1371,7 @@ static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
struct v4l2_format f;
@@ -1408,8 +1403,7 @@ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
static int vidioc_g_parm(struct file *file, void *priv,
struct v4l2_streamparm *p)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
int rc = 0;
@@ -1427,8 +1421,7 @@ static int vidioc_g_parm(struct file *file, void *priv,
static int vidioc_s_parm(struct file *file, void *priv,
struct v4l2_streamparm *p)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
p->parm.capture.readbuffers = EM28XX_MIN_BUF;
return v4l2_device_call_until_err(&dev->v4l2->v4l2_dev,
@@ -1450,8 +1443,7 @@ static const char *iname[] = {
static int vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *i)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
unsigned int n;
n = i->index;
@@ -1479,8 +1471,7 @@ static int vidioc_enum_input(struct file *file, void *priv,
static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
*i = dev->ctl_input;
@@ -1489,8 +1480,7 @@ static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
if (i >= MAX_EM28XX_INPUT)
return -EINVAL;
@@ -1503,8 +1493,7 @@ static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
switch (a->index) {
case EM28XX_AMUX_VIDEO:
@@ -1543,8 +1532,7 @@ static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
if (a->index >= MAX_EM28XX_INPUT)
return -EINVAL;
@@ -1563,8 +1551,7 @@ static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *t)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
if (0 != t->index)
return -EINVAL;
@@ -1578,8 +1565,7 @@ static int vidioc_g_tuner(struct file *file, void *priv,
static int vidioc_s_tuner(struct file *file, void *priv,
const struct v4l2_tuner *t)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
if (0 != t->index)
return -EINVAL;
@@ -1591,8 +1577,7 @@ static int vidioc_s_tuner(struct file *file, void *priv,
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
if (0 != f->tuner)
@@ -1606,8 +1591,7 @@ static int vidioc_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *f)
{
struct v4l2_frequency new_freq = *f;
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
if (0 != f->tuner)
@@ -1624,8 +1608,7 @@ static int vidioc_s_frequency(struct file *file, void *priv,
static int vidioc_g_chip_info(struct file *file, void *priv,
struct v4l2_dbg_chip_info *chip)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
if (chip->match.addr > 1)
return -EINVAL;
@@ -1652,8 +1635,7 @@ static int em28xx_reg_len(int reg)
static int vidioc_g_register(struct file *file, void *priv,
struct v4l2_dbg_register *reg)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
int ret;
if (reg->match.addr > 1)
@@ -1693,8 +1675,7 @@ static int vidioc_g_register(struct file *file, void *priv,
static int vidioc_s_register(struct file *file, void *priv,
const struct v4l2_dbg_register *reg)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
__le16 buf;
if (reg->match.addr > 1)
@@ -1715,8 +1696,7 @@ static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct video_device *vdev = video_devdata(file);
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
@@ -1761,8 +1741,7 @@ static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
static int vidioc_enum_framesizes(struct file *file, void *priv,
struct v4l2_frmsizeenum *fsize)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
struct em28xx_fmt *fmt;
unsigned int maxw = norm_maxw(dev);
unsigned int maxh = norm_maxh(dev);
@@ -1806,8 +1785,7 @@ static int vidioc_enum_framesizes(struct file *file, void *priv,
static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
struct v4l2_format *format)
{
- struct em28xx_fh *fh = priv;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(file);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
format->fmt.vbi.samples_per_line = v4l2->vbi_width;
@@ -1840,7 +1818,7 @@ static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
static int radio_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *t)
{
- struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
+ struct em28xx *dev = video_drvdata(file);
if (unlikely(t->index > 0))
return -EINVAL;
@@ -1855,7 +1833,7 @@ static int radio_g_tuner(struct file *file, void *priv,
static int radio_s_tuner(struct file *file, void *priv,
const struct v4l2_tuner *t)
{
- struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
+ struct em28xx *dev = video_drvdata(file);
if (0 != t->index)
return -EINVAL;
@@ -1890,7 +1868,7 @@ static int em28xx_v4l2_open(struct file *filp)
struct em28xx *dev = video_drvdata(filp);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
enum v4l2_buf_type fh_type = 0;
- struct em28xx_fh *fh;
+ int ret;
switch (vdev->vfl_type) {
case VFL_TYPE_GRABBER:
@@ -1905,24 +1883,23 @@ static int em28xx_v4l2_open(struct file *filp)
return -EINVAL;
}
- em28xx_videodbg("open dev=%s type=%s users=%d\n",
- video_device_node_name(vdev), v4l2_type_names[fh_type],
- v4l2->users);
+ em28xx_videodbg("open dev=%s type=%s\n",
+ video_device_node_name(vdev), v4l2_type_names[fh_type]);
if (mutex_lock_interruptible(&dev->lock))
return -ERESTARTSYS;
- fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
- if (!fh) {
- em28xx_errdev("em28xx-video.c: Out of memory?!\n");
+
+ ret = v4l2_fh_open(filp);
+ if (ret) {
+ em28xx_errdev("%s: v4l2_fh_open() returned error %d\n",
+ __func__, ret);
mutex_unlock(&dev->lock);
- return -ENOMEM;
+ return ret;
}
- v4l2_fh_init(&fh->fh, vdev);
- fh->dev = dev;
- fh->type = fh_type;
- filp->private_data = fh;
- if (v4l2->users == 0) {
+ if (v4l2_fh_is_singular_file(filp)) {
+ em28xx_videodbg("first opened filehandle, initializing device\n");
+
em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
if (vdev->vfl_type != VFL_TYPE_RADIO)
@@ -1933,6 +1910,8 @@ static int em28xx_v4l2_open(struct file *filp)
* of some i2c devices
*/
em28xx_wake_i2c(dev);
+ } else {
+ em28xx_videodbg("further filehandles are already opened\n");
}
if (vdev->vfl_type == VFL_TYPE_RADIO) {
@@ -1942,10 +1921,8 @@ static int em28xx_v4l2_open(struct file *filp)
kref_get(&dev->ref);
kref_get(&v4l2->ref);
- v4l2->users++;
mutex_unlock(&dev->lock);
- v4l2_fh_add(&fh->fh);
return 0;
}
@@ -2046,17 +2023,15 @@ static int em28xx_v4l2_resume(struct em28xx *dev)
*/
static int em28xx_v4l2_close(struct file *filp)
{
- struct em28xx_fh *fh = filp->private_data;
- struct em28xx *dev = fh->dev;
+ struct em28xx *dev = video_drvdata(filp);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
int errCode;
- em28xx_videodbg("users=%d\n", v4l2->users);
-
- vb2_fop_release(filp);
mutex_lock(&dev->lock);
- if (v4l2->users == 1) {
+ if (v4l2_fh_is_singular_file(filp)) {
+ em28xx_videodbg("last opened filehandle, shutting down device\n");
+
/* No sense to try to write to the device */
if (dev->disconnected)
goto exit;
@@ -2075,10 +2050,12 @@ static int em28xx_v4l2_close(struct file *filp)
em28xx_errdev("cannot change alternate number to "
"0 (error=%i)\n", errCode);
}
+ } else {
+ em28xx_videodbg("further opened filehandles left\n");
}
exit:
- v4l2->users--;
+ vb2_fop_release(filp);
kref_put(&v4l2->ref, em28xx_free_v4l2);
mutex_unlock(&dev->lock);
kref_put(&dev->ref, em28xx_free_device);
@@ -2208,7 +2185,6 @@ static struct video_device *em28xx_vdev_init(struct em28xx *dev,
vfd->v4l2_dev = &dev->v4l2->v4l2_dev;
vfd->debug = video_debug;
vfd->lock = &dev->lock;
- set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
if (dev->board.is_webcam)
vfd->tvnorms = 0;
@@ -2552,7 +2528,7 @@ static int em28xx_v4l2_init(struct em28xx *dev)
v4l2->vbi_dev->queue->lock = &v4l2->vb_vbi_queue_lock;
/* disable inapplicable ioctls */
- v4l2_disable_ioctl(v4l2->vdev, VIDIOC_S_PARM);
+ v4l2_disable_ioctl(v4l2->vbi_dev, VIDIOC_S_PARM);
if (dev->tuner_type == TUNER_ABSENT) {
v4l2_disable_ioctl(v4l2->vbi_dev, VIDIOC_G_TUNER);
v4l2_disable_ioctl(v4l2->vbi_dev, VIDIOC_S_TUNER);
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-26 22:30:01 +0100