commit 6c3598e641d447edbaaa05ff0d4cd6da152dc3f4
author Frank Schaefer <fschaefer.oss@googlemail.com> Sun Feb 10 16:05:14 2013 -0300
committer Mauro Carvalho Chehab <mchehab@redhat.com> Mon Mar 04 14:43:23 2013 -0300
tree 1e5c759841c32eb0cab376d3598dec66989d342d
parent b83741383565f675bd13861fc39cfacdd68d18c1

[media] em28xx: VIDIOC_ENUM_FRAMESIZES: consider the scaler limits when calculating the minimum frame size

Output resolutions <=20% of the input resolution exceed the capabilities of the
scaler.

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/usb/em28xx/em28xx-video.c

diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c
index f745617..86fd907 100644
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -1405,8 +1405,12 @@
 
 	/* Report a continuous range */
 	fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
-	fsize->stepwise.min_width = 48;
-	fsize->stepwise.min_height = 32;
+	scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX,
+		      &fsize->stepwise.min_width, &fsize->stepwise.min_height);
+	if (fsize->stepwise.min_width < 48)
+		fsize->stepwise.min_width = 48;
+	if (fsize->stepwise.min_height < 38)
+		fsize->stepwise.min_height = 38;
 	fsize->stepwise.max_width = maxw;
 	fsize->stepwise.max_height = maxh;
 	fsize->stepwise.step_width = 1;