0014-drm-meson-add-YUV422-output-support.patch

From 6e5868cad185179d9354280db495760e2e0f572d Mon Sep 17 00:00:00 2001
From: Dongjin Kim <tobetter@gmail.com>
Date: Wed, 29 Jul 2020 04:05:03 +0900
Subject: [PATCH] HACK: drm/meson: add YUV422 output support

Support YUV422 output from the Amlogic Meson SoC VPU to the HDMI
controller. This incorrectly fixes the green-line on GX devices.

Signed-off-by: Dongjin Kim <tobetter@gmail.com>
---
 drivers/gpu/drm/meson/meson_dw_hdmi.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index aad75a22dc338..97d6700818242 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -703,6 +703,7 @@ dw_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data,
 
 static const u32 meson_dw_hdmi_out_bus_fmts[] = {
 	MEDIA_BUS_FMT_YUV8_1X24,
+	MEDIA_BUS_FMT_UYVY8_1X16,
 	MEDIA_BUS_FMT_UYYVYY8_0_5X24,
 };
 
@@ -802,7 +803,8 @@ static void meson_venc_hdmi_encoder_mode_set(struct drm_bridge *bridge,
 	if (dw_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24) {
 		ycrcb_map = VPU_HDMI_OUTPUT_CRYCB;
 		yuv420_mode = true;
-	}
+	} else if (dw_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYVY8_1X16)
+		ycrcb_map = VPU_HDMI_OUTPUT_CRYCB;
 
 	/* VENC + VENC-DVI Mode setup */
 	meson_venc_hdmi_mode_set(priv, vic, ycrcb_map, yuv420_mode, mode);
@@ -814,6 +816,10 @@ static void meson_venc_hdmi_encoder_mode_set(struct drm_bridge *bridge,
 		/* Setup YUV420 to HDMI-TX, no 10bit diphering */
 		writel_relaxed(2 | (2 << 2),
 			       priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
+	else if (dw_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYVY8_1X16)
+		/* Setup YUV422 to HDMI-TX, no 10bit diphering */
+		writel_relaxed(1 | (2 << 2),
+				priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
 	else
 		/* Setup YUV444 to HDMI-TX, no 10bit diphering */
 		writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL));