V4L/DVB: gscpa_sonixb: limit ov7630 max framerate at 640x480
In 640x480, if the reg11 has less than 4, the image is
unstable (the bridge goes into a higher compression mode
which we have not reverse engineered yet).
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/gspca/sonixb.c b/drivers/media/video/gspca/sonixb.c
index 66fffa3..fda1420 100644
--- a/drivers/media/video/gspca/sonixb.c
+++ b/drivers/media/video/gspca/sonixb.c
@@ -809,10 +809,11 @@
else if (reg11 > 16)
reg11 = 16;
- /* In 640x480, if the reg11 has less than 3, the image is
- unstable (not enough bandwidth). */
- if (gspca_dev->width == 640 && reg11 < 3)
- reg11 = 3;
+ /* In 640x480, if the reg11 has less than 4, the image is
+ unstable (the bridge goes into a higher compression mode
+ which we have not reverse engineered yet). */
+ if (gspca_dev->width == 640 && reg11 < 4)
+ reg11 = 4;
/* frame exposure time in ms = 1000 * reg11 / 30 ->
reg10 = (sd->exposure / 2) * reg10_max / (1000 * reg11 / 30) */