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media: rockchip: rga: Only set output CSC mode for RGB input

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[ Upstream commit 0f879bab72f47e8ba2421a984e7acfa763d3e84e ]

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: f7e7b48e6d ("[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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Paul Kocialkowski 2020-04-30 18:42:45 +02:00 committed by Greg Kroah-Hartman
parent a676d83b8f
commit d7ee731744
1 changed files with 7 additions and 1 deletions
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8
drivers/media/platform/rockchip/rga/rga-hw.c
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@ -208,6 +208,11 @@ 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) {
@ -220,7 +225,8 @@ 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;