V4L/DVB (11419): gspca - m5602-ov9650: Don't read exposure data from COM1.

ov9650: Reading the COM1 register corrupts the image.
Decrease the granularity of the exposure and limit its upper range
as setting such high values doesn't have any effect on the image.

Signed-off-by: Erik Andr?n <erik.andren@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 3 insertions, 8 deletions

diff --git a/drivers/media/video/gspca/m5602/m5602_ov9650.c b/drivers/media/video/gspca/m5602/m5602_ov9650.c
index de45649c739c..da6b72a7cf6f 100644
--- a/drivers/media/video/gspca/m5602/m5602_ov9650.c
+++ b/drivers/media/video/gspca/m5602/m5602_ov9650.c
@@ -75,8 +75,8 @@ const static struct ctrl ov9650_ctrls[] = {
                         .type           = V4L2_CTRL_TYPE_INTEGER,
                         .name           = "exposure",
                         .minimum        = 0x00,
-                        .maximum        = 0xffff,
-                        .step           = 0x1,
+                        .maximum        = 0x1ff,
+                        .step           = 0x4,
                         .default_value  = EXPOSURE_DEFAULT,
                         .flags          = V4L2_CTRL_FLAG_SLIDER
                 },
@@ -407,11 +407,6 @@ int ov9650_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
         u8 i2c_data;
         int err;
 
-        err = m5602_read_sensor(sd, OV9650_COM1, &i2c_data, 1);
-        if (err < 0)
-                return err;
-        *val = i2c_data & 0x03;
-
         err = m5602_read_sensor(sd, OV9650_AECH, &i2c_data, 1);
         if (err < 0)
                 return err;
diff --git a/drivers/media/video/gspca/m5602/m5602_ov9650.h b/drivers/media/video/gspca/m5602/m5602_ov9650.h
index 08ae7ea96ffa..ca0e42ee05ce 100644
--- a/drivers/media/video/gspca/m5602/m5602_ov9650.h
+++ b/drivers/media/video/gspca/m5602/m5602_ov9650.h
@@ -123,7 +123,7 @@
 #define GAIN_DEFAULT                    0x14
 #define RED_GAIN_DEFAULT                0x70
 #define BLUE_GAIN_DEFAULT               0x20
-#define EXPOSURE_DEFAULT                0x5003
+#define EXPOSURE_DEFAULT                0x1ff
 
 /*****************************************************************************/