From fbd1b2bd039e0005946cf096fc7a521f336c8f33 Mon Sep 17 00:00:00 2001
From: Jonas Karlman <jonas@kwiboo.se>
Date: Wed, 4 Mar 2020 11:40:42 +0100
Subject: drm/bridge: dw-hdmi: set mtmdsclock for deep color
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Git-commit: c6cae702340069d9f48925bd2201359602a72e83
Patch-mainline: v5.7-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
Configure the correct mtmdsclock for deep colors to prepare support
for 10, 12 & 16bit output.
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Jernej Škrabec <jernej.skrabec@siol.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20200304104052.17196-2-narmstrong@baylibre.com
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index e8239cd1f944..237c8c440c86 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1820,13 +1820,32 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
int hblank, vblank, h_de_hs, v_de_vs, hsync_len, vsync_len;
unsigned int vdisplay, hdisplay;
- vmode->mtmdsclock = vmode->mpixelclock = mode->clock * 1000;
+ vmode->mpixelclock = mode->clock * 1000;
dev_dbg(hdmi->dev, "final pixclk = %d\n", vmode->mpixelclock);
+ vmode->mtmdsclock = vmode->mpixelclock;
+
+ if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) {
+ switch (hdmi_bus_fmt_color_depth(
+ hdmi->hdmi_data.enc_out_bus_format)) {
+ case 16:
+ vmode->mtmdsclock = vmode->mpixelclock * 2;
+ break;
+ case 12:
+ vmode->mtmdsclock = vmode->mpixelclock * 3 / 2;
+ break;
+ case 10:
+ vmode->mtmdsclock = vmode->mpixelclock * 5 / 4;
+ break;
+ }
+ }
+
if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format))
vmode->mtmdsclock /= 2;
+ dev_dbg(hdmi->dev, "final tmdsclock = %d\n", vmode->mtmdsclock);
+
/* Set up HDMI_FC_INVIDCONF */
inv_val = (hdmi->hdmi_data.hdcp_enable ||
(dw_hdmi_support_scdc(hdmi) &&
--
2.28.0