From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/video/pwc/pwc-if.c | 155 ++++---------------------------------
drivers/media/video/pwc/pwc-v4l.c | 140 +++------------------------------
drivers/media/video/pwc/pwc.h | 3 -
3 files changed, 24 insertions(+), 274 deletions(-)
diff --git a/drivers/media/video/pwc/pwc-if.c b/drivers/media/video/pwc/pwc-if.c
index ec4e2ef..0ae87ec 100644
--- a/drivers/media/video/pwc/pwc-if.c
+++ b/drivers/media/video/pwc/pwc-if.c
@@ -136,19 +136,13 @@ static int leds[2] = { 100, 0 };
/***/
-static int pwc_video_close(struct file *file);
-static ssize_t pwc_video_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos);
-static unsigned int pwc_video_poll(struct file *file, poll_table *wait);
-static int pwc_video_mmap(struct file *file, struct vm_area_struct *vma);
-
static const struct v4l2_file_operations pwc_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
- .release = pwc_video_close,
- .read = pwc_video_read,
- .poll = pwc_video_poll,
- .mmap = pwc_video_mmap,
+ .release = vb2_fop_release,
+ .read = vb2_fop_read,
+ .poll = vb2_fop_poll,
+ .mmap = vb2_fop_mmap,
.unlocked_ioctl = video_ioctl2,
};
static struct video_device pwc_template = {
@@ -562,17 +556,6 @@ static const char *pwc_sensor_type_to_string(unsigned int sensor_type)
/***************************************************************************/
/* Video4Linux functions */
-int pwc_test_n_set_capt_file(struct pwc_device *pdev, struct file *file)
-{
- if (pdev->capt_file != NULL &&
- pdev->capt_file != file)
- return -EBUSY;
-
- pdev->capt_file = file;
-
- return 0;
-}
-
static void pwc_video_release(struct v4l2_device *v)
{
struct pwc_device *pdev = container_of(v, struct pwc_device, v4l2_dev);
@@ -583,113 +566,6 @@ static void pwc_video_release(struct v4l2_device *v)
kfree(pdev);
}
-static int pwc_video_close(struct file *file)
-{
- struct pwc_device *pdev = video_drvdata(file);
-
- /*
- * If we're still streaming vb2_queue_release will call stream_stop
- * so we must take both the v4l2_lock and the vb_queue_lock.
- */
- if (mutex_lock_interruptible(&pdev->v4l2_lock))
- return -ERESTARTSYS;
- if (mutex_lock_interruptible(&pdev->vb_queue_lock)) {
- mutex_unlock(&pdev->v4l2_lock);
- return -ERESTARTSYS;
- }
-
- if (pdev->capt_file == file) {
- vb2_queue_release(&pdev->vb_queue);
- pdev->capt_file = NULL;
- }
-
- mutex_unlock(&pdev->vb_queue_lock);
- mutex_unlock(&pdev->v4l2_lock);
-
- return v4l2_fh_release(file);
-}
-
-static ssize_t pwc_video_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct pwc_device *pdev = video_drvdata(file);
- int lock_v4l2 = 0;
- ssize_t ret;
-
- if (mutex_lock_interruptible(&pdev->vb_queue_lock))
- return -ERESTARTSYS;
-
- ret = pwc_test_n_set_capt_file(pdev, file);
- if (ret)
- goto out;
-
- /* stream_start will get called so we must take the v4l2_lock */
- if (pdev->vb_queue.fileio == NULL)
- lock_v4l2 = 1;
-
- /* Use try_lock, since we're taking the locks in the *wrong* order! */
- if (lock_v4l2 && !mutex_trylock(&pdev->v4l2_lock)) {
- ret = -ERESTARTSYS;
- goto out;
- }
- ret = vb2_read(&pdev->vb_queue, buf, count, ppos,
- file->f_flags & O_NONBLOCK);
- if (lock_v4l2)
- mutex_unlock(&pdev->v4l2_lock);
-out:
- mutex_unlock(&pdev->vb_queue_lock);
- return ret;
-}
-
-static unsigned int pwc_video_poll(struct file *file, poll_table *wait)
-{
- struct pwc_device *pdev = video_drvdata(file);
- struct vb2_queue *q = &pdev->vb_queue;
- unsigned long req_events = poll_requested_events(wait);
- unsigned int ret = POLL_ERR;
- int lock_v4l2 = 0;
-
- if (mutex_lock_interruptible(&pdev->vb_queue_lock))
- return POLL_ERR;
-
- /* Will this start fileio and thus call start_stream? */
- if ((req_events & (POLLIN | POLLRDNORM)) &&
- q->num_buffers == 0 && !q->streaming && q->fileio == NULL) {
- if (pwc_test_n_set_capt_file(pdev, file))
- goto out;
- lock_v4l2 = 1;
- }
-
- /* Use try_lock, since we're taking the locks in the *wrong* order! */
- if (lock_v4l2 && !mutex_trylock(&pdev->v4l2_lock))
- goto out;
- ret = vb2_poll(&pdev->vb_queue, file, wait);
- if (lock_v4l2)
- mutex_unlock(&pdev->v4l2_lock);
-
-out:
- if (!pdev->udev)
- ret |= POLLHUP;
- mutex_unlock(&pdev->vb_queue_lock);
- return ret;
-}
-
-static int pwc_video_mmap(struct file *file, struct vm_area_struct *vma)
-{
- struct pwc_device *pdev = video_drvdata(file);
- int ret;
-
- if (mutex_lock_interruptible(&pdev->vb_queue_lock))
- return -ERESTARTSYS;
-
- ret = pwc_test_n_set_capt_file(pdev, file);
- if (ret == 0)
- ret = vb2_mmap(&pdev->vb_queue, vma);
-
- mutex_unlock(&pdev->vb_queue_lock);
- return ret;
-}
-
/***************************************************************************/
/* Videobuf2 operations */
@@ -782,6 +658,8 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
if (!pdev->udev)
return -ENODEV;
+ if (mutex_lock_interruptible(&pdev->v4l2_lock))
+ return -ERESTARTSYS;
/* Turn on camera and set LEDS on */
pwc_camera_power(pdev, 1);
pwc_set_leds(pdev, leds[0], leds[1]);
@@ -794,6 +672,7 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
/* And cleanup any queued bufs!! */
pwc_cleanup_queued_bufs(pdev);
}
+ mutex_unlock(&pdev->v4l2_lock);
return r;
}
@@ -802,6 +681,8 @@ static int stop_streaming(struct vb2_queue *vq)
{
struct pwc_device *pdev = vb2_get_drv_priv(vq);
+ if (mutex_lock_interruptible(&pdev->v4l2_lock))
+ return -ERESTARTSYS;
if (pdev->udev) {
pwc_set_leds(pdev, 0, 0);
pwc_camera_power(pdev, 0);
@@ -809,6 +690,7 @@ static int stop_streaming(struct vb2_queue *vq)
}
pwc_cleanup_queued_bufs(pdev);
+ mutex_unlock(&pdev->v4l2_lock);
return 0;
}
@@ -1136,6 +1018,8 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id
/* Init video_device structure */
memcpy(&pdev->vdev, &pwc_template, sizeof(pwc_template));
strcpy(pdev->vdev.name, name);
+ pdev->vdev.queue = &pdev->vb_queue;
+ pdev->vdev.queue_lock = &pdev->vb_queue_lock;
set_bit(V4L2_FL_USE_FH_PRIO, &pdev->vdev.flags);
video_set_drvdata(&pdev->vdev, pdev);
@@ -1190,15 +1074,6 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id
pdev->vdev.v4l2_dev = &pdev->v4l2_dev;
pdev->vdev.lock = &pdev->v4l2_lock;
- /*
- * Don't take v4l2_lock for these ioctls. This improves latency if
- * v4l2_lock is taken for a long time, e.g. when changing a control
- * value, and a new frame is ready to be dequeued.
- */
- v4l2_disable_ioctl_locking(&pdev->vdev, VIDIOC_DQBUF);
- v4l2_disable_ioctl_locking(&pdev->vdev, VIDIOC_QBUF);
- v4l2_disable_ioctl_locking(&pdev->vdev, VIDIOC_QUERYBUF);
-
rc = video_register_device(&pdev->vdev, VFL_TYPE_GRABBER, -1);
if (rc < 0) {
PWC_ERROR("Failed to register as video device (%d).\n", rc);
@@ -1253,20 +1128,18 @@ static void usb_pwc_disconnect(struct usb_interface *intf)
struct v4l2_device *v = usb_get_intfdata(intf);
struct pwc_device *pdev = container_of(v, struct pwc_device, v4l2_dev);
- mutex_lock(&pdev->v4l2_lock);
-
mutex_lock(&pdev->vb_queue_lock);
+ mutex_lock(&pdev->v4l2_lock);
/* No need to keep the urbs around after disconnection */
if (pdev->vb_queue.streaming)
pwc_isoc_cleanup(pdev);
pdev->udev = NULL;
pwc_cleanup_queued_bufs(pdev);
- mutex_unlock(&pdev->vb_queue_lock);
v4l2_device_disconnect(&pdev->v4l2_dev);
video_unregister_device(&pdev->vdev);
-
mutex_unlock(&pdev->v4l2_lock);
+ mutex_unlock(&pdev->vb_queue_lock);
#ifdef CONFIG_USB_PWC_INPUT_EVDEV
if (pdev->button_dev)
diff --git a/drivers/media/video/pwc/pwc-v4l.c b/drivers/media/video/pwc/pwc-v4l.c
index c691e29..114ae41 100644
--- a/drivers/media/video/pwc/pwc-v4l.c
+++ b/drivers/media/video/pwc/pwc-v4l.c
@@ -468,17 +468,8 @@ static int pwc_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
if (ret < 0)
return ret;
- if (mutex_lock_interruptible(&pdev->vb_queue_lock))
- return -ERESTARTSYS;
-
- ret = pwc_test_n_set_capt_file(pdev, file);
- if (ret)
- goto leave;
-
- if (pdev->vb_queue.streaming) {
- ret = -EBUSY;
- goto leave;
- }
+ if (vb2_is_busy(&pdev->vb_queue))
+ return -EBUSY;
pixelformat = f->fmt.pix.pixelformat;
@@ -496,8 +487,6 @@ static int pwc_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
PWC_DEBUG_IOCTL("pwc_set_video_mode(), return=%d\n", ret);
pwc_vidioc_fill_fmt(f, pdev->width, pdev->height, pdev->pixfmt);
-leave:
- mutex_unlock(&pdev->vb_queue_lock);
return ret;
}
@@ -933,104 +922,6 @@ static int pwc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *
return pwc_vidioc_try_fmt(pdev, f);
}
-static int pwc_reqbufs(struct file *file, void *fh,
- struct v4l2_requestbuffers *rb)
-{
- struct pwc_device *pdev = video_drvdata(file);
- int ret;
-
- if (mutex_lock_interruptible(&pdev->vb_queue_lock))
- return -ERESTARTSYS;
-
- ret = pwc_test_n_set_capt_file(pdev, file);
- if (ret == 0)
- ret = vb2_reqbufs(&pdev->vb_queue, rb);
-
- mutex_unlock(&pdev->vb_queue_lock);
- return ret;
-}
-
-static int pwc_querybuf(struct file *file, void *fh, struct v4l2_buffer *buf)
-{
- struct pwc_device *pdev = video_drvdata(file);
- int ret;
-
- if (mutex_lock_interruptible(&pdev->vb_queue_lock))
- return -ERESTARTSYS;
-
- ret = pwc_test_n_set_capt_file(pdev, file);
- if (ret == 0)
- ret = vb2_querybuf(&pdev->vb_queue, buf);
-
- mutex_unlock(&pdev->vb_queue_lock);
- return ret;
-}
-
-static int pwc_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
-{
- struct pwc_device *pdev = video_drvdata(file);
- int ret;
-
- if (mutex_lock_interruptible(&pdev->vb_queue_lock))
- return -ERESTARTSYS;
-
- ret = pwc_test_n_set_capt_file(pdev, file);
- if (ret == 0)
- ret = vb2_qbuf(&pdev->vb_queue, buf);
-
- mutex_unlock(&pdev->vb_queue_lock);
- return ret;
-}
-
-static int pwc_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
-{
- struct pwc_device *pdev = video_drvdata(file);
- int ret;
-
- if (mutex_lock_interruptible(&pdev->vb_queue_lock))
- return -ERESTARTSYS;
-
- ret = pwc_test_n_set_capt_file(pdev, file);
- if (ret == 0)
- ret = vb2_dqbuf(&pdev->vb_queue, buf,
- file->f_flags & O_NONBLOCK);
-
- mutex_unlock(&pdev->vb_queue_lock);
- return ret;
-}
-
-static int pwc_streamon(struct file *file, void *fh, enum v4l2_buf_type i)
-{
- struct pwc_device *pdev = video_drvdata(file);
- int ret;
-
- if (mutex_lock_interruptible(&pdev->vb_queue_lock))
- return -ERESTARTSYS;
-
- ret = pwc_test_n_set_capt_file(pdev, file);
- if (ret == 0)
- ret = vb2_streamon(&pdev->vb_queue, i);
-
- mutex_unlock(&pdev->vb_queue_lock);
- return ret;
-}
-
-static int pwc_streamoff(struct file *file, void *fh, enum v4l2_buf_type i)
-{
- struct pwc_device *pdev = video_drvdata(file);
- int ret;
-
- if (mutex_lock_interruptible(&pdev->vb_queue_lock))
- return -ERESTARTSYS;
-
- ret = pwc_test_n_set_capt_file(pdev, file);
- if (ret == 0)
- ret = vb2_streamoff(&pdev->vb_queue, i);
-
- mutex_unlock(&pdev->vb_queue_lock);
- return ret;
-}
-
static int pwc_enum_framesizes(struct file *file, void *fh,
struct v4l2_frmsizeenum *fsize)
{
@@ -1119,25 +1010,14 @@ static int pwc_s_parm(struct file *file, void *fh,
fps = parm->parm.capture.timeperframe.denominator /
parm->parm.capture.timeperframe.numerator;
- if (mutex_lock_interruptible(&pdev->vb_queue_lock))
- return -ERESTARTSYS;
-
- ret = pwc_test_n_set_capt_file(pdev, file);
- if (ret)
- goto leave;
-
- if (pdev->vb_queue.streaming) {
- ret = -EBUSY;
- goto leave;
- }
+ if (vb2_is_busy(&pdev->vb_queue))
+ return -EBUSY;
ret = pwc_set_video_mode(pdev, pdev->width, pdev->height, pdev->pixfmt,
fps, &compression, 0);
pwc_g_parm(file, fh, parm);
-leave:
- mutex_unlock(&pdev->vb_queue_lock);
return ret;
}
@@ -1150,12 +1030,12 @@ const struct v4l2_ioctl_ops pwc_ioctl_ops = {
.vidioc_g_fmt_vid_cap = pwc_g_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = pwc_s_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = pwc_try_fmt_vid_cap,
- .vidioc_reqbufs = pwc_reqbufs,
- .vidioc_querybuf = pwc_querybuf,
- .vidioc_qbuf = pwc_qbuf,
- .vidioc_dqbuf = pwc_dqbuf,
- .vidioc_streamon = pwc_streamon,
- .vidioc_streamoff = pwc_streamoff,
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
.vidioc_log_status = v4l2_ctrl_log_status,
.vidioc_enum_framesizes = pwc_enum_framesizes,
.vidioc_enum_frameintervals = pwc_enum_frameintervals,
diff --git a/drivers/media/video/pwc/pwc.h b/drivers/media/video/pwc/pwc.h
index d6b5b21..7a6a0d3 100644
--- a/drivers/media/video/pwc/pwc.h
+++ b/drivers/media/video/pwc/pwc.h
@@ -239,7 +239,6 @@ struct pwc_device
int features; /* feature bits */
/*** Video data ***/
- struct file *capt_file; /* file doing video capture */
int vendpoint; /* video isoc endpoint */
int vcinterface; /* video control interface */
int valternate; /* alternate interface needed */
@@ -355,8 +354,6 @@ struct pwc_device
extern int pwc_trace;
#endif
-int pwc_test_n_set_capt_file(struct pwc_device *pdev, struct file *file);
-
/** Functions in pwc-misc.c */
/* sizes in pixels */
extern const int pwc_image_sizes[PSZ_MAX][2];
--
1.7.10
--
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