[PATCH v2 3/4] media: i2c: ov5640: Add support for BT656 mode

[Lad Prabhakar]

Enable support for BT656 mode.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad...@bp.renesas.com>
Reviewed-by: Biju Das <biju.das...@bp.renesas.com>
---
 drivers/media/i2c/ov5640.c | 40 +++++++++++++++++++++++++++-----------
 1 file changed, 29 insertions(+), 11 deletions(-)

diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
index ec444bee2ce9..08c67250042f 100644
--- a/drivers/media/i2c/ov5640.c
+++ b/drivers/media/i2c/ov5640.c
@@ -82,6 +82,7 @@
 #define OV5640_REG_VFIFO_HSIZE         0x4602
 #define OV5640_REG_VFIFO_VSIZE         0x4604
 #define OV5640_REG_JPG_MODE_SELECT     0x4713
+#define OV5640_REG_CCIR656_CTRL00      0x4730
 #define OV5640_REG_POLARITY_CTRL00     0x4740
 #define OV5640_REG_MIPI_CTRL00         0x4800
 #define OV5640_REG_DEBUG_MODE          0x4814
@@ -1216,6 +1217,18 @@ static int ov5640_set_autogain(struct ov5640_dev 
*sensor, bool on)
                              BIT(1), on ? 0 : BIT(1));
 }
 
+static int ov5640_set_stream_bt656(struct ov5640_dev *sensor, bool on)
+{
+       int ret;
+
+       ret = ov5640_write_reg(sensor, OV5640_REG_CCIR656_CTRL00, on ? 0x1 : 
0x00);
+       if (ret)
+               return ret;
+
+       return ov5640_write_reg(sensor, OV5640_REG_SYS_CTRL0, on ?
+                               OV5640_SOFTWARE_WAKEUP : OV5640_SOFTWARE_PWDN);
+}
+
 static int ov5640_set_stream_dvp(struct ov5640_dev *sensor, bool on)
 {
        return ov5640_write_reg(sensor, OV5640_REG_SYS_CTRL0, on ?
@@ -2022,18 +2035,20 @@ static int ov5640_set_dvp(struct ov5640_dev *sensor, 
bool on)
         *              datasheet and hardware, 0 is active high
         *              and 1 is active low...)
         */
-       if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
-               pclk_pol = 1;
-       if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
-               hsync_pol = 1;
-       if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
-               vsync_pol = 1;
+       if (sensor->ep.bus_type == V4L2_MBUS_PARALLEL) {
+               if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
+                       pclk_pol = 1;
+               if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
+                       hsync_pol = 1;
+               if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+                       vsync_pol = 1;
 
-       ret = ov5640_write_reg(sensor, OV5640_REG_POLARITY_CTRL00,
-                              (pclk_pol << 5) | (hsync_pol << 1) | vsync_pol);
+               ret = ov5640_write_reg(sensor, OV5640_REG_POLARITY_CTRL00,
+                                      (pclk_pol << 5) | (hsync_pol << 1) | 
vsync_pol);
 
-       if (ret)
-               return ret;
+               if (ret)
+                       return ret;
+       }
 
        /*
         * powerdown MIPI TX/RX PHY & disable MIPI
@@ -2057,7 +2072,8 @@ static int ov5640_set_dvp(struct ov5640_dev *sensor, bool 
on)
         * - 4:         PCLK output enable
         * - [3:0]:     D[9:6] output enable
         */
-       ret = ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE01, 0x7f);
+       ret = ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE01,
+                              sensor->ep.bus_type == V4L2_MBUS_PARALLEL ? 0x7f 
: 0x1f);
        if (ret)
                return ret;
 
@@ -2911,6 +2927,8 @@ static int ov5640_s_stream(struct v4l2_subdev *sd, int 
enable)
 
                if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY)
                        ret = ov5640_set_stream_mipi(sensor, enable);
+               else if (sensor->ep.bus_type == V4L2_MBUS_BT656)
+                       ret = ov5640_set_stream_bt656(sensor, enable);
                else
                        ret = ov5640_set_stream_dvp(sensor, enable);
 
-- 
2.17.1