[PATCH v2 4/4] media: rockchip: rga: Only set output CSC mode for RGB input

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Setting the output CSC mode is required for a YUV output, but must not
be set when the input is also YUV. Doing this (as tested with a YUV420P
to YUV420P conversion) results in wrong colors.

Adapt the logic to only set the CSC mode when the output is YUV and the
input is RGB.

Fixes: f7e7b48e6d79 ("[media] rockchip/rga: v4l2 m2m support")
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
---
 drivers/media/platform/rockchip/rga/rga-hw.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/media/platform/rockchip/rga/rga-hw.c b/drivers/media/platform/rockchip/rga/rga-hw.c
index 4be6dcf292ff..cbffcf986ccf 100644
--- a/drivers/media/platform/rockchip/rga/rga-hw.c
+++ b/drivers/media/platform/rockchip/rga/rga-hw.c
@@ -216,13 +216,17 @@ static void rga_cmd_set_trans_info(struct rga_ctx *ctx)
 	}
 
 	if (ctx->out.fmt->hw_format >= RGA_COLOR_FMT_YUV422SP) {
-		switch (ctx->out.colorspace) {
-		case V4L2_COLORSPACE_REC709:
-			dst_info.data.csc_mode = RGA_SRC_CSC_MODE_BT709_R0;
-			break;
-		default:
-			dst_info.data.csc_mode = RGA_DST_CSC_MODE_BT601_R0;
-			break;
+		if (ctx->in.fmt->hw_format < RGA_COLOR_FMT_YUV422SP) {
+			switch (ctx->out.colorspace) {
+			case V4L2_COLORSPACE_REC709:
+				dst_info.data.csc_mode =
+					RGA_SRC_CSC_MODE_BT709_R0;
+				break;
+			default:
+				dst_info.data.csc_mode =
+					RGA_DST_CSC_MODE_BT601_R0;
+				break;
+			}
 		}
 	}
 
-- 
2.26.0


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