media: i.MX6: Support 16-bit BT.1120 video input

Confirmed to work with ADV7610 HDMI receiver.
Signed-off-by: Krzysztof Hałasa <khalasa@piap.pl>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/gpu/ipu-v3/ipu-csi.c

@@ -259,10 +259,24 @@ static int mbus_code_to_bus_cfg(struct ipu_csi_bus_config *cfg, u32 mbus_code,
 		cfg->data_width = IPU_CSI_DATA_WIDTH_8;
 		break;
 	case MEDIA_BUS_FMT_UYVY8_1X16:
+		if (mbus_type == V4L2_MBUS_BT656) {
+			cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_YUV422_UYVY;
+			cfg->data_width = IPU_CSI_DATA_WIDTH_8;
+		} else {
+			cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_BAYER;
+			cfg->data_width = IPU_CSI_DATA_WIDTH_16;
+		}
+		cfg->mipi_dt = MIPI_DT_YUV422;
+		break;
 	case MEDIA_BUS_FMT_YUYV8_1X16:
-		cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_BAYER;
+		if (mbus_type == V4L2_MBUS_BT656) {
+			cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_YUV422_YUYV;
+			cfg->data_width = IPU_CSI_DATA_WIDTH_8;
+		} else {
+			cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_BAYER;
+			cfg->data_width = IPU_CSI_DATA_WIDTH_16;
+		}
 		cfg->mipi_dt = MIPI_DT_YUV422;
-		cfg->data_width = IPU_CSI_DATA_WIDTH_16;
 		break;
 	case MEDIA_BUS_FMT_SBGGR8_1X8:
 	case MEDIA_BUS_FMT_SGBRG8_1X8:
@@ -332,7 +346,7 @@ static int fill_csi_bus_cfg(struct ipu_csi_bus_config *csicfg,
 			    const struct v4l2_mbus_config *mbus_cfg,
 			    const struct v4l2_mbus_framefmt *mbus_fmt)
 {
-	int ret;
+	int ret, is_bt1120;
 
 	memset(csicfg, 0, sizeof(*csicfg));
 
@@ -353,11 +367,18 @@ static int fill_csi_bus_cfg(struct ipu_csi_bus_config *csicfg,
 		break;
 	case V4L2_MBUS_BT656:
 		csicfg->ext_vsync = 0;
+		/* UYVY10_1X20 etc. should be supported as well */
+		is_bt1120 = mbus_fmt->code == MEDIA_BUS_FMT_UYVY8_1X16 ||
+			    mbus_fmt->code == MEDIA_BUS_FMT_YUYV8_1X16;
 		if (V4L2_FIELD_HAS_BOTH(mbus_fmt->field) ||
 		    mbus_fmt->field == V4L2_FIELD_ALTERNATE)
-			csicfg->clk_mode = IPU_CSI_CLK_MODE_CCIR656_INTERLACED;
+			csicfg->clk_mode = is_bt1120 ?
+				IPU_CSI_CLK_MODE_CCIR1120_INTERLACED_SDR :
+				IPU_CSI_CLK_MODE_CCIR656_INTERLACED;
 		else
-			csicfg->clk_mode = IPU_CSI_CLK_MODE_CCIR656_PROGRESSIVE;
+			csicfg->clk_mode = is_bt1120 ?
+				IPU_CSI_CLK_MODE_CCIR1120_PROGRESSIVE_SDR :
+				IPU_CSI_CLK_MODE_CCIR656_PROGRESSIVE;
 		break;
 	case V4L2_MBUS_CSI2_DPHY:
 		/*

drivers/staging/media/imx/imx-media-csi.c

@@ -139,6 +139,8 @@ static inline bool is_parallel_16bit_bus(struct v4l2_fwnode_endpoint *ep)
  * Check for conditions that require the IPU to handle the
  * data internally as generic data, aka passthrough mode:
  * - raw bayer media bus formats, or
+ * - BT.656 and BT.1120 (8/10-bit YUV422) data can always be processed
+ *   on-the-fly
  * - the CSI is receiving from a 16-bit parallel bus, or
  * - the CSI is receiving from an 8-bit parallel bus and the incoming
  *   media bus format is other than UYVY8_2X8/YUYV8_2X8.
@@ -147,6 +149,9 @@ static inline bool requires_passthrough(struct v4l2_fwnode_endpoint *ep,
 					struct v4l2_mbus_framefmt *infmt,
 					const struct imx_media_pixfmt *incc)
 {
+	if (ep->bus_type == V4L2_MBUS_BT656) // including BT.1120
+		return 0;
+
 	return incc->bayer || is_parallel_16bit_bus(ep) ||
 		(is_parallel_bus(ep) &&
 		 infmt->code != MEDIA_BUS_FMT_UYVY8_2X8 &&