V4L/DVB (11470): gspca - m5602-mt9m111: Implement an auto white balancing control

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

diff --git a/drivers/media/video/gspca/m5602/m5602_mt9m111.c b/drivers/media/video/gspca/m5602/m5602_mt9m111.c
index a057b8d..37a7fc8 100644 (file)
--- a/drivers/media/video/gspca/m5602/m5602_mt9m111.c
+++ b/drivers/media/video/gspca/m5602/m5602_mt9m111.c
@@ -24,6 +24,11 @@ static int mt9m111_get_hflip(struct gspca_dev *gspca_dev, __s32 *val);
 static int mt9m111_set_hflip(struct gspca_dev *gspca_dev, __s32 val);
 static int mt9m111_get_gain(struct gspca_dev *gspca_dev, __s32 *val);
 static int mt9m111_set_gain(struct gspca_dev *gspca_dev, __s32 val);
+static int mt9m111_set_auto_white_balance(struct gspca_dev *gspca_dev,
+                                        __s32 val);
+static int mt9m111_get_auto_white_balance(struct gspca_dev *gspca_dev,
+                                         __s32 *val);
+
 
 static struct v4l2_pix_format mt9m111_modes[] = {
        {
@@ -81,6 +86,20 @@ const static struct ctrl mt9m111_ctrls[] = {
                },
                .set = mt9m111_set_gain,
                .get = mt9m111_get_gain
+       },
+#define AUTO_WHITE_BALANCE_IDX 3
+       {
+               {
+                       .id             = V4L2_CID_AUTO_WHITE_BALANCE,
+                       .type           = V4L2_CTRL_TYPE_BOOLEAN,
+                       .name           = "auto white balance",
+                       .minimum        = 0,
+                       .maximum        = 1,
+                       .step           = 1,
+                       .default_value  = 0,
+               },
+               .set = mt9m111_set_auto_white_balance,
+               .get = mt9m111_get_auto_white_balance
        }
 };
 
@@ -273,6 +292,37 @@ static int mt9m111_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
        return 0;
 }
 
+static int mt9m111_set_auto_white_balance(struct gspca_dev *gspca_dev,
+                                         __s32 val)
+{
+       struct sd *sd = (struct sd *) gspca_dev;
+       s32 *sensor_settings = sd->sensor_priv;
+       int err;
+       u8 data[2];
+
+       err = m5602_read_sensor(sd, MT9M111_CP_OPERATING_MODE_CTL, data, 2);
+       if (err < 0)
+               return err;
+
+       sensor_settings[AUTO_WHITE_BALANCE_IDX] = val & 0x01;
+       data[0] = ((data[0] & 0xfd) | ((val & 0x01) << 1));
+
+       err = m5602_write_sensor(sd, MT9M111_CP_OPERATING_MODE_CTL, data, 2);
+
+       PDEBUG(D_V4L2, "Set auto white balance %d", val);
+       return err;
+}
+
+static int mt9m111_get_auto_white_balance(struct gspca_dev *gspca_dev,
+                                         __s32 *val) {
+       struct sd *sd = (struct sd *) gspca_dev;
+       s32 *sensor_settings = sd->sensor_priv;
+
+       *val = sensor_settings[AUTO_WHITE_BALANCE_IDX];
+       PDEBUG(D_V4L2, "Read auto white balance %d", *val);
+       return 0;
+}
+
 static int mt9m111_set_gain(struct gspca_dev *gspca_dev, __s32 val)
 {
        int err, tmp;