media: imx: Propagate quantization and encoding in CSI

Unlike the PRPENC and PRPVF subdevices, the CSI's cannot convert
quantization from sink to source, or do any kind of Y'CbCr <-> RGB
encoding. So the CSI's cannot allow quantization and ycbcr_enc to be
selectable by the user and must be propagated from sink to source.

Fixes: 4791bd7d ("media: imx: Try colorimetry at both sink and source pads")
Reported-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Tested-by: Tim Harvey <tharvey@gateworks.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/imx-media-csi.c

@@ -1459,6 +1459,8 @@ static void csi_try_fmt(struct csi_priv *priv,
 		/* propagate colorimetry from sink */
 		sdformat->format.colorspace = infmt->colorspace;
 		sdformat->format.xfer_func = infmt->xfer_func;
+		sdformat->format.quantization = infmt->quantization;
+		sdformat->format.ycbcr_enc = infmt->ycbcr_enc;
 
 		break;
 	case CSI_SINK_PAD:

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

@@ -1013,6 +1013,8 @@ static int imx7_csi_try_fmt(struct imx7_csi *csi,
 
 		sdformat->format.colorspace = in_fmt->colorspace;
 		sdformat->format.xfer_func = in_fmt->xfer_func;
+		sdformat->format.quantization = in_fmt->quantization;
+		sdformat->format.ycbcr_enc = in_fmt->ycbcr_enc;
 		break;
 	case IMX7_CSI_PAD_SINK:
 		*cc = imx_media_find_mbus_format(sdformat->format.code,