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>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/media/video/gspca/sonixb.c b/drivers/media/video/gspca/sonixb.c
index 66fffa345e7b..fda14200a050 100644
--- a/drivers/media/video/gspca/sonixb.c
+++ b/drivers/media/video/gspca/sonixb.c
@@ -809,10 +809,11 @@ static void setexposure(struct gspca_dev *gspca_dev)
                 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) */