#define OV5693_GAIN_ADDR_MSB 0x350A
#define OV5693_GAIN_ADDR_LSB 0x350B
#define OV5693_GROUP_HOLD_ADDR 0x3208
+#define OV5693_TIMING_REG20 0x3820
+#define VERTICAL_FLIP ((0x1 << 1) | (0x1 << 6))
+#define OV5693_TIMING_REG21 0x3821
+#define HORIZONTAL_MIRROR_MASK (0x3 << 1)
struct ov5693_mode {
int res_x;