From 0f879bab72f47e8ba2421a984e7acfa763d3e84e Mon Sep 17 00:00:00 2001
From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Date: Thu, 30 Apr 2020 18:42:45 +0200
Subject: [PATCH] media: rockchip: rga: Only set output CSC mode for RGB input
Git-commit: 0f879bab72f47e8ba2421a984e7acfa763d3e84e
Patch-mainline: v5.9-rc1
References: git-fixes
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 output CSC mode when the output is YUV and
the input is RGB. Also add a comment to clarify the rationale.
Fixes: f7e7b48e6d79 ("[media] rockchip/rga: v4l2 m2m support")
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/media/platform/rockchip/rga/rga-hw.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/rockchip/rga/rga-hw.c b/drivers/media/platform/rockchip/rga/rga-hw.c
index 5607ee8d1917..aaa96f256356 100644
--- a/drivers/media/platform/rockchip/rga/rga-hw.c
+++ b/drivers/media/platform/rockchip/rga/rga-hw.c
@@ -200,6 +200,11 @@ static void rga_cmd_set_trans_info(struct rga_ctx *ctx)
dst_info.data.format = ctx->out.fmt->hw_format;
dst_info.data.swap = ctx->out.fmt->color_swap;
+ /*
+ * CSC mode must only be set when the colorspace families differ between
+ * input and output. It must remain unset (zeroed) if both are the same.
+ */
+
if (RGA_COLOR_FMT_IS_YUV(ctx->in.fmt->hw_format) &&
RGA_COLOR_FMT_IS_RGB(ctx->out.fmt->hw_format)) {
switch (ctx->in.colorspace) {
@@ -212,7 +217,8 @@ static void rga_cmd_set_trans_info(struct rga_ctx *ctx)
}
}
- if (RGA_COLOR_FMT_IS_YUV(ctx->out.fmt->hw_format)) {
+ if (RGA_COLOR_FMT_IS_RGB(ctx->in.fmt->hw_format) &&
+ RGA_COLOR_FMT_IS_YUV(ctx->out.fmt->hw_format)) {
switch (ctx->out.colorspace) {
case V4L2_COLORSPACE_REC709:
dst_info.data.csc_mode = RGA_SRC_CSC_MODE_BT709_R0;
--
2.16.4