From 3751e288bcf3d77652ef979edc0b3ea8b21d8b97 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Tue, 16 Nov 2010 11:39:25 -0300 Subject: [media] pwc: do not start isoc stream on /dev/video open pwc was starting streaming on /dev/video# open rather then on STREAM_ON. Now that the v4l1 compat code is removed from the pwc driver there is no reason left to do this. So this patch changes the pwc driver to delay starting the isoc stream (and thus using valuable usb bandwidth) until the application does a STREAM_ON Signed-off-by: Hans de Goede Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/pwc/pwc-v4l.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'drivers/media/video/pwc/pwc-v4l.c') diff --git a/drivers/media/video/pwc/pwc-v4l.c b/drivers/media/video/pwc/pwc-v4l.c index 7061a03f5cf1..2ef1668638f9 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: -- cgit v1.2.1