[media] pwc: Avoid sending mode info to the camera when it is not needed
Since we always do a set_video_mode on stream start, there is no need
to actually send the mode info to the device on a s_fmt / s_parm ioctl.
Not doing this saves us doing (slow) usb io.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/pwc/pwc-if.c b/drivers/media/video/pwc/pwc-if.c
index 1f3386d..23eacee 100644
--- a/drivers/media/video/pwc/pwc-if.c
+++ b/drivers/media/video/pwc/pwc-if.c
@@ -385,8 +385,8 @@
retry:
/* We first try with low compression and then retry with a higher
compression setting if there is not enough bandwidth. */
- ret = pwc_set_video_mode(pdev, pdev->width, pdev->height,
- pdev->pixfmt, pdev->vframes, &compression);
+ ret = pwc_set_video_mode(pdev, pdev->width, pdev->height, pdev->pixfmt,
+ pdev->vframes, &compression, 1);
/* Get the current alternate interface, adjust packet size */
intf = usb_ifnum_to_if(udev, 0);
@@ -1129,7 +1129,7 @@
/* Setup intial videomode */
rc = pwc_set_video_mode(pdev, MAX_WIDTH, MAX_HEIGHT,
- V4L2_PIX_FMT_YUV420, 30, &compression);
+ V4L2_PIX_FMT_YUV420, 30, &compression, 1);
if (rc)
goto err_free_mem;
