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drm/rockchip: pre dither down when output bpc is 8bit

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Some encoder have a crc verification check, crc check fail if
input and output data is not equal.

That means encoder input and output need use same color depth,
vop can output 10bit data to encoder, but some panel only support
8bit depth, that would make crc check die.

So pre dither down vop data to 8bit if panel's bpc is 8.

Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
[seanpaul resolved conflict in rockchip_drm_vop.c]
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180423105003.9004-22-enric.balletbo@collabora.com
This commit is contained in:
Mark Yao
2018-04-23 12:49:57 +02:00
committed by Andrzej Hajda
parent 7bd0fd9850
commit 6bda8112fe
5 changed files with 11 additions and 0 deletions
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1
drivers/gpu/drm/rockchip/rockchip_drm_drv.h
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@@ -36,6 +36,7 @@ struct rockchip_crtc_state {
struct drm_crtc_state base;
int output_type;
int output_mode;
int output_bpc;
};
#define to_rockchip_crtc_state(s) \
container_of(s, struct rockchip_crtc_state, base)