V4L/DVB: gspca - sn9c20x: Fix exposure control for HV7131R sensor
Make the range of exposure values (0-0x1770) distribute evenly through
HV7131R's exposure control bytes.
Signed-off-by: German Galkin <galkinga@gmail.com>
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/gspca/sn9c20x.c b/drivers/media/video/gspca/sn9c20x.c
index 3dee3e5..04bf80d 100644
--- a/drivers/media/video/gspca/sn9c20x.c
+++ b/drivers/media/video/gspca/sn9c20x.c
@@ -1655,9 +1655,9 @@
case SENSOR_HV7131R:
exp[0] |= (4 << 4);
exp[2] = 0x25;
- exp[3] = ((sd->exposure * 0xffffff) / 0xffff) >> 16;
- exp[4] = ((sd->exposure * 0xffffff) / 0xffff) >> 8;
- exp[5] = ((sd->exposure * 0xffffff) / 0xffff) & 0xff;
+ exp[3] = (sd->exposure >> 5) & 0xff;
+ exp[4] = (sd->exposure << 3) & 0xff;
+ exp[5] = 0;
break;
default:
return 0;