[PATCH v3 07/10] media: i2c: imx290: Add RAW12 mode support

[Andrey Konovalov <andrey.konovalov@xxxxxxxxxx>]

From: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>

IMX290 is capable of outputting frames in both Raw Bayer (packed) 10 and
12 bit formats. Since the driver already supports RAW10 mode, let's add
the missing RAW12 mode as well.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Signed-off-by: Andrey Konovalov <andrey.konovalov@xxxxxxxxxx>
---
 drivers/media/i2c/imx290.c | 36 +++++++++++++++++++++++++++++++++---
 1 file changed, 33 insertions(+), 3 deletions(-)

diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c
index 162c345fffac..6e70ff22bc5f 100644
--- a/drivers/media/i2c/imx290.c
+++ b/drivers/media/i2c/imx290.c
@@ -71,6 +71,7 @@ struct imx290 {
 	struct clk *xclk;
 	struct regmap *regmap;
 	u8 nlanes;
+	u8 bpp;
 
 	struct v4l2_subdev sd;
 	struct v4l2_fwnode_endpoint ep;
@@ -90,10 +91,12 @@ struct imx290 {
 
 struct imx290_pixfmt {
 	u32 code;
+	u8 bpp;
 };
 
 static const struct imx290_pixfmt imx290_formats[] = {
-	{ MEDIA_BUS_FMT_SRGGB10_1X10 },
+	{ MEDIA_BUS_FMT_SRGGB10_1X10, 10 },
+	{ MEDIA_BUS_FMT_SRGGB12_1X12, 12 },
 };
 
 static const struct regmap_config imx290_regmap_config = {
@@ -261,6 +264,18 @@ static const struct imx290_regval imx290_10bit_settings[] = {
 	{ 0x300b, 0x00},
 };
 
+static const struct imx290_regval imx290_12bit_settings[] = {
+	{ 0x3005, 0x01 },
+	{ 0x3046, 0x01 },
+	{ 0x3129, 0x00 },
+	{ 0x317c, 0x00 },
+	{ 0x31ec, 0x0e },
+	{ 0x3441, 0x0c },
+	{ 0x3442, 0x0c },
+	{ 0x300a, 0xf0 },
+	{ 0x300b, 0x00 },
+};
+
 /* supported link frequencies */
 static const s64 imx290_link_freq_2lanes[] = {
 	891000000, /* 1920x1080 -  2 lane */
@@ -421,7 +436,12 @@ static int imx290_set_ctrl(struct v4l2_ctrl *ctrl)
 		} else {
 			imx290_write_reg(imx290, IMX290_PGCTRL, 0x00);
 			msleep(10);
-			imx290_write_reg(imx290, IMX290_BLKLEVEL_LOW, 0x3c);
+			if (imx290->bpp == 10)
+				imx290_write_reg(imx290, IMX290_BLKLEVEL_LOW,
+						 0x3c);
+			else /* 12 bits per pixel */
+				imx290_write_reg(imx290, IMX290_BLKLEVEL_LOW,
+						 0xf0);
 			imx290_write_reg(imx290, IMX290_BLKLEVEL_HIGH, 0x00);
 		}
 		break;
@@ -496,7 +516,7 @@ static u64 imx290_calc_pixel_rate(struct imx290 *imx290)
 	u8 nlanes = imx290->nlanes;
 
 	/* pixel rate = link_freq * 2 * nr_of_lanes / bits_per_sample */
-	return (link_freq * 2 * nlanes / 10);
+	return (link_freq * 2 * nlanes / imx290->bpp);
 }
 
 static int imx290_set_fmt(struct v4l2_subdev *sd,
@@ -533,6 +553,7 @@ static int imx290_set_fmt(struct v4l2_subdev *sd,
 	} else {
 		format = &imx290->current_format;
 		imx290->current_mode = mode;
+		imx290->bpp = imx290_formats[i].bpp;
 
 		if (imx290->link_freq)
 			__v4l2_ctrl_s_ctrl(imx290->link_freq,
@@ -577,6 +598,15 @@ static int imx290_write_current_format(struct imx290 *imx290)
 			return ret;
 		}
 		break;
+	case MEDIA_BUS_FMT_SRGGB12_1X12:
+		ret = imx290_set_register_array(imx290, imx290_12bit_settings,
+						ARRAY_SIZE(
+							imx290_12bit_settings));
+		if (ret < 0) {
+			dev_err(imx290->dev, "Could not set format registers\n");
+			return ret;
+		}
+		break;
 	default:
 		dev_err(imx290->dev, "Unknown pixel format\n");
 		return -EINVAL;
-- 
2.17.1