[PATCH v3 4/4] media: rockchip: rga: Only set output CSC mode for RGB input
From: Paul Kocialkowski <hidden>
Date: 2020-04-30 16:43:08
Also in:
linux-devicetree, linux-media, linux-rockchip, lkml
Subsystem:
arm/rockchip soc support, media input infrastructure (v4l/dvb), rockchip raster 2d graphic acceleration unit driver, the rest · Maintainers:
Heiko Stuebner, Mauro Carvalho Chehab, Jacob Chen, Ezequiel Garcia, Linus Torvalds
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 <redacted>
---
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;
--
2.26.0
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