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-rw-r--r--drivers/media/video/pwc/pwc-ctrl.c7
-rw-r--r--drivers/media/video/pwc/pwc-if.c54
-rw-r--r--drivers/media/video/pwc/pwc-v4l.c13
-rw-r--r--drivers/media/video/pwc/pwc.h1
4 files changed, 27 insertions, 48 deletions
diff --git a/drivers/media/video/pwc/pwc-ctrl.c b/drivers/media/video/pwc/pwc-ctrl.c
index 6b8fbddc074..1593f8deb81 100644
--- a/drivers/media/video/pwc/pwc-ctrl.c
+++ b/drivers/media/video/pwc/pwc-ctrl.c
@@ -1386,11 +1386,16 @@ long pwc_ioctl(struct pwc_device *pdev, unsigned int cmd, void *arg)
{
ARG_DEF(int, qual)
+ if (pdev->iso_init) {
+ ret = -EBUSY;
+ break;
+ }
+
ARG_IN(qual)
if (ARGR(qual) < 0 || ARGR(qual) > 3)
ret = -EINVAL;
else
- ret = pwc_try_video_mode(pdev, pdev->view.x, pdev->view.y, pdev->vframes, ARGR(qual), pdev->vsnapshot);
+ ret = pwc_set_video_mode(pdev, pdev->view.x, pdev->view.y, pdev->vframes, ARGR(qual), pdev->vsnapshot);
if (ret >= 0)
pdev->vcompression = ARGR(qual);
break;
diff --git a/drivers/media/video/pwc/pwc-if.c b/drivers/media/video/pwc/pwc-if.c
index b821065e387..6f8b682b924 100644
--- a/drivers/media/video/pwc/pwc-if.c
+++ b/drivers/media/video/pwc/pwc-if.c
@@ -966,36 +966,6 @@ void pwc_isoc_cleanup(struct pwc_device *pdev)
PWC_DEBUG_OPEN("<< pwc_isoc_cleanup()\n");
}
-int pwc_try_video_mode(struct pwc_device *pdev, int width, int height, int new_fps, int new_compression, int new_snapshot)
-{
- int ret, start;
-
- /* Stop isoc stuff */
- pwc_isoc_cleanup(pdev);
- /* Reset parameters */
- pwc_reset_buffers(pdev);
- /* Try to set video mode... */
- start = ret = pwc_set_video_mode(pdev, width, height, new_fps, new_compression, new_snapshot);
- if (ret) {
- PWC_DEBUG_FLOW("pwc_set_video_mode attempt 1 failed.\n");
- /* That failed... restore old mode (we know that worked) */
- start = pwc_set_video_mode(pdev, pdev->view.x, pdev->view.y, pdev->vframes, pdev->vcompression, pdev->vsnapshot);
- if (start) {
- PWC_DEBUG_FLOW("pwc_set_video_mode attempt 2 failed.\n");
- }
- }
- if (start == 0)
- {
- if (pwc_isoc_init(pdev) < 0)
- {
- PWC_WARNING("Failed to restart ISOC transfers in pwc_try_video_mode.\n");
- ret = -EAGAIN; /* let's try again, who knows if it works a second time */
- }
- }
- pdev->drop_frames++; /* try to avoid garbage during switch */
- return ret; /* Return original error code */
-}
-
/*********
* sysfs
*********/
@@ -1175,7 +1145,7 @@ static int pwc_video_open(struct file *file)
/* Set some defaults */
pdev->vsnapshot = 0;
- /* Start iso pipe for video; first try the last used video size
+ /* Set video size, first try the last used video size
(or the default one); if that fails try QCIF/10 or QSIF/10;
it that fails too, give up.
*/
@@ -1202,15 +1172,6 @@ static int pwc_video_open(struct file *file)
return i;
}
- i = pwc_isoc_init(pdev);
- if (i) {
- PWC_DEBUG_OPEN("Failed to init ISOC stuff = %d.\n", i);
- pwc_isoc_cleanup(pdev);
- pwc_free_buffers(pdev);
- mutex_unlock(&pdev->modlock);
- return i;
- }
-
/* Initialize the webcam to sane value */
pwc_set_brightness(pdev, 0x7fff);
pwc_set_agc(pdev, 1, 0);
@@ -1325,6 +1286,11 @@ static ssize_t pwc_video_read(struct file *file, char __user *buf,
goto err_out;
}
+ /* Start the stream (if not already started) */
+ rv = pwc_isoc_init(pdev);
+ if (rv)
+ goto err_out;
+
/* In case we're doing partial reads, we don't have to wait for a frame */
if (pdev->image_read_pos == 0) {
/* Do wait queueing according to the (doc)book */
@@ -1394,6 +1360,7 @@ static unsigned int pwc_video_poll(struct file *file, poll_table *wait)
{
struct video_device *vdev = file->private_data;
struct pwc_device *pdev;
+ int ret;
if (vdev == NULL)
return -EFAULT;
@@ -1401,6 +1368,13 @@ static unsigned int pwc_video_poll(struct file *file, poll_table *wait)
if (pdev == NULL)
return -EFAULT;
+ /* Start the stream (if not already started) */
+ mutex_lock(&pdev->modlock);
+ ret = pwc_isoc_init(pdev);
+ mutex_unlock(&pdev->modlock);
+ if (ret)
+ return ret;
+
poll_wait(file, &pdev->frameq, wait);
if (pdev->error_status)
return POLLERR;
diff --git a/drivers/media/video/pwc/pwc-v4l.c b/drivers/media/video/pwc/pwc-v4l.c
index 7061a03f5cf..2ef1668638f 100644
--- a/drivers/media/video/pwc/pwc-v4l.c
+++ b/drivers/media/video/pwc/pwc-v4l.c
@@ -309,7 +309,10 @@ static int pwc_vidioc_set_fmt(struct pwc_device *pdev, struct v4l2_format *f)
pixelformat != V4L2_PIX_FMT_PWC2)
return -EINVAL;
- PWC_DEBUG_IOCTL("Try to change format to: width=%d height=%d fps=%d "
+ if (pdev->iso_init)
+ return -EBUSY;
+
+ PWC_DEBUG_IOCTL("Trying to set format to: width=%d height=%d fps=%d "
"compression=%d snapshot=%d format=%c%c%c%c\n",
f->fmt.pix.width, f->fmt.pix.height, fps,
compression, snapshot,
@@ -318,14 +321,14 @@ static int pwc_vidioc_set_fmt(struct pwc_device *pdev, struct v4l2_format *f)
(pixelformat>>16)&255,
(pixelformat>>24)&255);
- ret = pwc_try_video_mode(pdev,
+ ret = pwc_set_video_mode(pdev,
f->fmt.pix.width,
f->fmt.pix.height,
fps,
compression,
snapshot);
- PWC_DEBUG_IOCTL("pwc_try_video_mode(), return=%d\n", ret);
+ PWC_DEBUG_IOCTL("pwc_set_video_mode(), return=%d\n", ret);
if (ret)
return ret;
@@ -882,9 +885,7 @@ long pwc_video_do_ioctl(struct file *file, unsigned int cmd, void *arg)
case VIDIOC_STREAMON:
{
- /* WARNING: pwc_try_video_mode() called pwc_isoc_init */
- pwc_isoc_init(pdev);
- return 0;
+ return pwc_isoc_init(pdev);
}
case VIDIOC_STREAMOFF:
diff --git a/drivers/media/video/pwc/pwc.h b/drivers/media/video/pwc/pwc.h
index 36a9c83b5f5..16bbc6df9b0 100644
--- a/drivers/media/video/pwc/pwc.h
+++ b/drivers/media/video/pwc/pwc.h
@@ -275,7 +275,6 @@ extern int pwc_trace;
extern int pwc_mbufs;
/** functions in pwc-if.c */
-int pwc_try_video_mode(struct pwc_device *pdev, int width, int height, int new_fps, int new_compression, int new_snapshot);
int pwc_handle_frame(struct pwc_device *pdev);
void pwc_next_image(struct pwc_device *pdev);
int pwc_isoc_init(struct pwc_device *pdev);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-18 08:07:25 +0000