V4L/DVB (7897): TCM825x: Include invertation of image mirroring in configuration

Add invertation of image mirroring register bits to default
configuration.

This is useful when the camera module is e.g. mounted upside down.

Signed-off-by: Sakari Ailus <sakari.ailus@nokia.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/tcm825x.c

@@ -523,6 +523,9 @@ static int ioctl_g_ctrl(struct v4l2_int_device *s,
 	if (val < 0)
 		return val;
 
+	if (vc->id == V4L2_CID_HFLIP || vc->id == V4L2_CID_VFLIP)
+		val ^= sensor->platform_data->is_upside_down();
+
 	vc->value = val;
 	return 0;
 }
@@ -556,6 +559,9 @@ static int ioctl_s_ctrl(struct v4l2_int_device *s,
 	if (lvc == NULL)
 		return -EINVAL;
 
+	if (vc->id == V4L2_CID_HFLIP || vc->id == V4L2_CID_VFLIP)
+		val ^= sensor->platform_data->is_upside_down();
+
 	val = val << lvc->start_bit;
 	if (tcm825x_write_reg_mask(client, lvc->reg, val))
 		return -EIO;

drivers/media/video/tcm825x.h

@@ -182,6 +182,7 @@ struct tcm825x_platform_data {
 	int (*needs_reset)(struct v4l2_int_device *s, void *buf,
 			   struct v4l2_pix_format *fmt);
 	int (*ifparm)(struct v4l2_ifparm *p);
+	int (*is_upside_down)(void);
 };
 
 /* Array of image sizes supported by TCM825X.  These must be ordered from