media: ov2680: Add a bunch of register tweaks

Usually when developing a sensor driver with help from the vendor
the vendor will provide a bunch of register tweaks for optimal
performance of the sensor.

The atomisp-ov2680.c driver was (presumably) developed by Intel with
help from OmniVision and indeed contains a bunch of register tweaks.

Add these register tweaks to the "main" ov2680.c driver.
Acked-by: Rui Miguel Silva <rmfrfs@gmail.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/i2c/ov2680.c

@@ -180,18 +180,71 @@ static const int ov2680_hv_flip_bayer_order[] = {
 };
 
 static const struct reg_sequence ov2680_global_setting[] = {
+	/* MIPI PHY, 0x10 -> 0x1c enable bp_c_hs_en_lat and bp_d_hs_en_lat */
+	{0x3016, 0x1c},
+
 	/* R MANUAL set exposure and gain to manual (hw does not do auto) */
 	{0x3503, 0x03},
 
+	/* Analog control register tweaks */
+	{0x3603, 0x39}, /* Reset value 0x99 */
+	{0x3604, 0x24}, /* Reset value 0x74 */
+	{0x3621, 0x37}, /* Reset value 0x44 */
+
+	/* Sensor control register tweaks */
+	{0x3701, 0x64}, /* Reset value 0x61 */
+	{0x3705, 0x3c}, /* Reset value 0x21 */
+	{0x370c, 0x50}, /* Reset value 0x10 */
+	{0x370d, 0xc0}, /* Reset value 0x00 */
+	{0x3718, 0x88}, /* Reset value 0x80 */
+
+	/* PSRAM tweaks */
+	{0x3781, 0x80}, /* Reset value 0x00 */
+	{0x3784, 0x0c}, /* Reset value 0x00, based on OV2680_R1A_AM10.ovt */
+	{0x3789, 0x60}, /* Reset value 0x50 */
+
+	/* BLC CTRL00 0x01 -> 0x81 set avg_weight to 8 */
+	{0x4000, 0x81},
+
 	/* Set black level compensation range to 0 - 3 (default 0 - 11) */
 	{0x4008, 0x00},
 	{0x4009, 0x03},
 
+	/* VFIFO R2 0x00 -> 0x02 set Frame reset enable */
+	{0x4602, 0x02},
+
+	/* MIPI ctrl CLK PREPARE MIN change from 0x26 (38) -> 0x36 (54) */
+	{0x481f, 0x36},
+
+	/* MIPI ctrl CLK LPX P MIN change from 0x32 (50) -> 0x36 (54) */
+	{0x4825, 0x36},
+
+	/* R ISP CTRL2 0x20 -> 0x30, set sof_sel bit */
+	{0x5002, 0x30},
+
 	/*
 	 * Window CONTROL 0x00 -> 0x01, enable manual window control,
 	 * this is necessary for full size flip and mirror support.
 	 */
 	{0x5708, 0x01},
+
+	/*
+	 * DPC CTRL0 0x14 -> 0x3e, set enable_tail, enable_3x3_cluster
+	 * and enable_general_tail bits based OV2680_R1A_AM10.ovt.
+	 */
+	{0x5780, 0x3e},
+
+	/* DPC MORE CONNECTION CASE THRE 0x0c (12) -> 0x02 (2) */
+	{0x5788, 0x02},
+
+	/* DPC GAIN LIST1 0x0f (15) -> 0x08 (8) */
+	{0x578e, 0x08},
+
+	/* DPC GAIN LIST2 0x3f (63) -> 0x0c (12) */
+	{0x578f, 0x0c},
+
+	/* DPC THRE RATIO 0x04 (4) -> 0x00 (0) */
+	{0x5792, 0x00},
 };
 
 static struct ov2680_dev *to_ov2680_dev(struct v4l2_subdev *sd)