Rockchip: linux: add patch to fix RGB to YUV422 conversion in dw-hdmi

CoreELEC · May 13, 2021 · 8cce2e2 · 8cce2e2
1 parent aada40a
commit 8cce2e2
Showing 1 changed file with 35 additions and 0 deletions.
diff --git a/projects/Rockchip/patches/linux/default/linux-1001-drm-rockchip.patch b/projects/Rockchip/patches/linux/default/linux-1001-drm-rockchip.patch
@@ -3421,3 +3421,38 @@ index 3719309ad0d0..00025dcd3bb9 100644
  	{ /* sentinel */ }
  };
 
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Algea Cao <algea.cao@rock-chips.com>
+Date: Wed, 6 Jun 2018 15:47:12 +0800
+Subject: [PATCH] drm/bridge: synopsys: dw-hdmi: Select formula1 for csc
+ decimation
+
+Formula3 and Formula2 for csc decimation will cause hdmi yuv422
+display err.
+
+Formula3:
+The pixel color of left 0-14 columns and right 0-12 columns is
+err.
+
+Formula2:
+The pixel color of left 0-2 columns is err.
+
+Change-Id: I94fdd5fd962a24fde02dde1fe3ac10437ad117ad
+Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
+---
+ drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+index 3340aef73d8d..d798846579f5 100644
+--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
++++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+@@ -1060,7 +1060,7 @@ static void hdmi_video_csc(struct dw_hdmi *hdmi)
+ 	if (is_color_space_interpolation(hdmi))
+ 		interpolation = HDMI_CSC_CFG_INTMODE_CHROMA_INT_FORMULA1;
+ 	else if (is_color_space_decimation(hdmi))
+-		decimation = HDMI_CSC_CFG_DECMODE_CHROMA_INT_FORMULA3;
++		decimation = HDMI_CSC_CFG_DECMODE_CHROMA_INT_FORMULA1;
+
+ 	switch (hdmi_bus_fmt_color_depth(hdmi->hdmi_data.enc_out_bus_format)) {
+ 	case 8: