media: imx: imx7-media-csi: Set the MIPI data type based on the bus code

The MIPI CSI-2 data type depends solely on the media bus code on the
sink pad. Deriving it from the pixel format is confusing. Simplify the
code.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/imx/imx7-media-csi.c

@@ -482,7 +482,6 @@ static void imx7_csi_configure(struct imx7_csi *csi)
 {
 	struct imx_media_video_dev *vdev = csi->vdev;
 	struct v4l2_pix_format *out_pix = &vdev->fmt;
-	__u32 in_code = csi->format_mbus[IMX7_CSI_PAD_SINK].code;
 	u32 cr1, cr18;
 	int width = out_pix->width;
 
@@ -518,37 +517,52 @@ static void imx7_csi_configure(struct imx7_csi *csi)
 	cr18 &= BIT_MIPI_DATA_FORMAT_MASK;
 	cr18 |= BIT_DATA_FROM_MIPI;
 
-	switch (out_pix->pixelformat) {
-	case V4L2_PIX_FMT_UYVY:
-	case V4L2_PIX_FMT_YUYV:
-		cr18 |= BIT_MIPI_DATA_FORMAT_YUV422_8B;
-		break;
-	case V4L2_PIX_FMT_GREY:
-		if (in_code == MEDIA_BUS_FMT_Y8_1X8)
+	switch (csi->format_mbus[IMX7_CSI_PAD_SINK].code) {
+	case MEDIA_BUS_FMT_Y8_1X8:
+	case MEDIA_BUS_FMT_SBGGR8_1X8:
+	case MEDIA_BUS_FMT_SGBRG8_1X8:
+	case MEDIA_BUS_FMT_SGRBG8_1X8:
+	case MEDIA_BUS_FMT_SRGGB8_1X8:
 		cr18 |= BIT_MIPI_DATA_FORMAT_RAW8;
-		else if (in_code == MEDIA_BUS_FMT_Y10_1X10)
-			cr18 |= BIT_MIPI_DATA_FORMAT_RAW10;
-		else
-			cr18 |= BIT_MIPI_DATA_FORMAT_RAW12;
 		break;
-	case V4L2_PIX_FMT_Y10:
+	case MEDIA_BUS_FMT_Y10_1X10:
+	case MEDIA_BUS_FMT_SBGGR10_1X10:
+	case MEDIA_BUS_FMT_SGBRG10_1X10:
+	case MEDIA_BUS_FMT_SGRBG10_1X10:
+	case MEDIA_BUS_FMT_SRGGB10_1X10:
 		cr18 |= BIT_MIPI_DATA_FORMAT_RAW10;
-		cr1 |= BIT_PIXEL_BIT;
 		break;
-	case V4L2_PIX_FMT_Y12:
+	case MEDIA_BUS_FMT_Y12_1X12:
+	case MEDIA_BUS_FMT_SBGGR12_1X12:
+	case MEDIA_BUS_FMT_SGBRG12_1X12:
+	case MEDIA_BUS_FMT_SGRBG12_1X12:
+	case MEDIA_BUS_FMT_SRGGB12_1X12:
 		cr18 |= BIT_MIPI_DATA_FORMAT_RAW12;
-		cr1 |= BIT_PIXEL_BIT;
 		break;
-	case V4L2_PIX_FMT_SBGGR8:
-		cr18 |= BIT_MIPI_DATA_FORMAT_RAW8;
+	case MEDIA_BUS_FMT_Y14_1X14:
+	case MEDIA_BUS_FMT_SBGGR14_1X14:
+	case MEDIA_BUS_FMT_SGBRG14_1X14:
+	case MEDIA_BUS_FMT_SGRBG14_1X14:
+	case MEDIA_BUS_FMT_SRGGB14_1X14:
+		cr18 |= BIT_MIPI_DATA_FORMAT_RAW14;
 		break;
+	/*
+	 * CSI-2 sources are supposed to use the 1X16 formats, but not all of
+	 * them comply. Support both variants.
+	 */
+	case MEDIA_BUS_FMT_UYVY8_2X8:
+	case MEDIA_BUS_FMT_UYVY8_1X16:
+	case MEDIA_BUS_FMT_YUYV8_2X8:
+	case MEDIA_BUS_FMT_YUYV8_1X16:
+		cr18 |= BIT_MIPI_DATA_FORMAT_YUV422_8B;
+		break;
+	}
+
+	switch (out_pix->pixelformat) {
+	case V4L2_PIX_FMT_Y10:
+	case V4L2_PIX_FMT_Y12:
+	case V4L2_PIX_FMT_SBGGR8:
 	case V4L2_PIX_FMT_SBGGR16:
-		if (in_code == MEDIA_BUS_FMT_SBGGR10_1X10)
-			cr18 |= BIT_MIPI_DATA_FORMAT_RAW10;
-		else if (in_code == MEDIA_BUS_FMT_SBGGR12_1X12)
-			cr18 |= BIT_MIPI_DATA_FORMAT_RAW12;
-		else if (in_code == MEDIA_BUS_FMT_SBGGR14_1X14)
-			cr18 |= BIT_MIPI_DATA_FORMAT_RAW14;
 		cr1 |= BIT_PIXEL_BIT;
 		break;
 	}