[media] ov772x: Add support for SBGGR10 format

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/i2c/soc_camera/ov772x.c

@@ -275,6 +275,7 @@
 #define SLCT_VGA        0x00	/*   0 : VGA */
 #define SLCT_QVGA       0x40	/*   1 : QVGA */
 #define ITU656_ON_OFF   0x20	/* ITU656 protocol ON/OFF selection */
+#define SENSOR_RAW	0x10	/* Sensor RAW */
 				/* RGB output format control */
 #define FMT_MASK        0x0c	/*      Mask of color format */
 #define FMT_GBR422      0x00	/*      00 : GBR 4:2:2 */
@@ -338,6 +339,12 @@
 #define CBAR_ON         0x20	/*   ON */
 #define CBAR_OFF        0x00	/*   OFF */
 
+/* DSP_CTRL4 */
+#define DSP_OFMT_YUV	0x00
+#define DSP_OFMT_RGB	0x00
+#define DSP_OFMT_RAW8	0x02
+#define DSP_OFMT_RAW10	0x03
+
 /* HSTART */
 #define HST_VGA         0x23
 #define HST_QVGA        0x3F
@@ -389,6 +396,7 @@ struct ov772x_color_format {
 	enum v4l2_mbus_pixelcode code;
 	enum v4l2_colorspace colorspace;
 	u8 dsp3;
+	u8 dsp4;
 	u8 com3;
 	u8 com7;
 };
@@ -447,6 +455,7 @@ static const struct ov772x_color_format ov772x_cfmts[] = {
 		.code		= V4L2_MBUS_FMT_YUYV8_2X8,
 		.colorspace	= V4L2_COLORSPACE_JPEG,
 		.dsp3		= 0x0,
+		.dsp4		= DSP_OFMT_YUV,
 		.com3		= SWAP_YUV,
 		.com7		= OFMT_YUV,
 	},
@@ -454,6 +463,7 @@ static const struct ov772x_color_format ov772x_cfmts[] = {
 		.code		= V4L2_MBUS_FMT_YVYU8_2X8,
 		.colorspace	= V4L2_COLORSPACE_JPEG,
 		.dsp3		= UV_ON,
+		.dsp4		= DSP_OFMT_YUV,
 		.com3		= SWAP_YUV,
 		.com7		= OFMT_YUV,
 	},
@@ -461,6 +471,7 @@ static const struct ov772x_color_format ov772x_cfmts[] = {
 		.code		= V4L2_MBUS_FMT_UYVY8_2X8,
 		.colorspace	= V4L2_COLORSPACE_JPEG,
 		.dsp3		= 0x0,
+		.dsp4		= DSP_OFMT_YUV,
 		.com3		= 0x0,
 		.com7		= OFMT_YUV,
 	},
@@ -468,6 +479,7 @@ static const struct ov772x_color_format ov772x_cfmts[] = {
 		.code		= V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE,
 		.colorspace	= V4L2_COLORSPACE_SRGB,
 		.dsp3		= 0x0,
+		.dsp4		= DSP_OFMT_YUV,
 		.com3		= SWAP_RGB,
 		.com7		= FMT_RGB555 | OFMT_RGB,
 	},
@@ -475,6 +487,7 @@ static const struct ov772x_color_format ov772x_cfmts[] = {
 		.code		= V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE,
 		.colorspace	= V4L2_COLORSPACE_SRGB,
 		.dsp3		= 0x0,
+		.dsp4		= DSP_OFMT_YUV,
 		.com3		= 0x0,
 		.com7		= FMT_RGB555 | OFMT_RGB,
 	},
@@ -482,6 +495,7 @@ static const struct ov772x_color_format ov772x_cfmts[] = {
 		.code		= V4L2_MBUS_FMT_RGB565_2X8_LE,
 		.colorspace	= V4L2_COLORSPACE_SRGB,
 		.dsp3		= 0x0,
+		.dsp4		= DSP_OFMT_YUV,
 		.com3		= SWAP_RGB,
 		.com7		= FMT_RGB565 | OFMT_RGB,
 	},
@@ -489,9 +503,22 @@ static const struct ov772x_color_format ov772x_cfmts[] = {
 		.code		= V4L2_MBUS_FMT_RGB565_2X8_BE,
 		.colorspace	= V4L2_COLORSPACE_SRGB,
 		.dsp3		= 0x0,
+		.dsp4		= DSP_OFMT_YUV,
 		.com3		= 0x0,
 		.com7		= FMT_RGB565 | OFMT_RGB,
 	},
+	{
+		/* Setting DSP4 to DSP_OFMT_RAW8 still gives 10-bit output,
+		 * regardless of the COM7 value. We can thus only support 10-bit
+		 * Bayer until someone figures it out.
+		 */
+		.code		= V4L2_MBUS_FMT_SBGGR10_1X10,
+		.colorspace	= V4L2_COLORSPACE_SRGB,
+		.dsp3		= 0x0,
+		.dsp4		= DSP_OFMT_RAW10,
+		.com3		= 0x0,
+		.com7		= SENSOR_RAW | OFMT_BRAW,
+	},
 };
 
 
@@ -808,6 +835,13 @@ static int ov772x_set_params(struct ov772x_priv *priv,
 			goto ov772x_set_fmt_error;
 	}
 
+	/* DSP_CTRL4: AEC reference point and DSP output format. */
+	if (cfmt->dsp4) {
+		ret = ov772x_write(client, DSP_CTRL4, cfmt->dsp4);
+		if (ret < 0)
+			goto ov772x_set_fmt_error;
+	}
+
 	/*
 	 * set COM3
 	 */
@@ -826,13 +860,8 @@ static int ov772x_set_params(struct ov772x_priv *priv,
 	if (ret < 0)
 		goto ov772x_set_fmt_error;
 
-	/*
-	 * set COM7
-	 */
-	val = win->com7_bit | cfmt->com7;
-	ret = ov772x_mask_set(client,
-			      COM7, SLCT_MASK | FMT_MASK | OFMT_MASK,
-			      val);
+	/* COM7: Sensor resolution and output format control. */
+	ret = ov772x_write(client, COM7, win->com7_bit | cfmt->com7);
 	if (ret < 0)
 		goto ov772x_set_fmt_error;