media: imx: imx6-media-csi: Support clamping Y10 and Y12 to Y8

10-bit and 12-bit greyscale input data to the CSI can be written as
8-bit data to memory. Support this.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Steve Longerbeam <slongerbeam@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/imx-media-utils.c

@@ -161,7 +161,11 @@ static const struct imx_media_pixfmt rgb_formats[] = {
 		.bayer  = true,
 	}, {
 		.fourcc = V4L2_PIX_FMT_GREY,
-		.codes = {MEDIA_BUS_FMT_Y8_1X8},
+		.codes = {
+			MEDIA_BUS_FMT_Y8_1X8,
+			MEDIA_BUS_FMT_Y10_1X10,
+			MEDIA_BUS_FMT_Y12_1X12,
+		},
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 8,
 		.bayer  = true,