linux-kernel - [PATCH 3/5] media: i2c: imx290: Add RAW12 mode support

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Date:   Sat, 30 Nov 2019 00:35:39 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     mchehab@...nel.org, sakari.ailus@....fi
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        c.barrett@...mos.com, a.brela@...mos.com, peter.griffin@...aro.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH 3/5] media: i2c: imx290: Add RAW12 mode support

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@...aro.org>
---
 drivers/media/i2c/imx290.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c
index e218c959a729..d5bb3a59ac46 100644
--- a/drivers/media/i2c/imx290.c
+++ b/drivers/media/i2c/imx290.c
@@ -75,6 +75,7 @@ struct imx290 {
 	struct clk *xclk;
 	struct regmap *regmap;
 	int nlanes;
+	u8 bpp;
 
 	struct v4l2_subdev sd;
 	struct v4l2_fwnode_endpoint ep;
@@ -98,6 +99,7 @@ struct imx290_pixfmt {
 
 static const struct imx290_pixfmt imx290_formats[] = {
 	{ MEDIA_BUS_FMT_SRGGB10_1X10 },
+	{ MEDIA_BUS_FMT_SRGGB12_1X12 },
 };
 
 static const struct regmap_config imx290_regmap_config = {
@@ -265,6 +267,18 @@ 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[] = {
 	IMX290_DEFAULT_LINK_FREQ,
@@ -550,6 +564,21 @@ static int imx290_write_current_format(struct imx290 *imx290,
 			dev_err(imx290->dev, "Could not set format registers\n");
 			return ret;
 		}
+
+		imx290->bpp = 10;
+
+		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;
+		}
+
+		imx290->bpp = 12;
+
 		break;
 	default:
 		dev_err(imx290->dev, "Unknown pixel format\n");
@@ -910,6 +939,9 @@ static int imx290_probe(struct i2c_client *client)
 		goto free_err;
 	}
 
+	/* Default bits per pixel value */
+	imx290->bpp = 10;
+
 	mutex_init(&imx290->lock);
 
 	v4l2_ctrl_handler_init(&imx290->ctrls, 4);
-- 
2.17.1