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Subject[PATCH v3 01/10] drm/bridge: dw-hdmi: set mtmdsclock for deep color
Date
From: Jonas Karlman <jonas@kwiboo.se>

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>
---
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index dbe38a54870b..6a0b4b3a6739 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1792,9 +1792,26 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,

dev_dbg(hdmi->dev, "final pixclk = %d\n", 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 = (u64)vmode->mpixelclock * 2;
+ break;
+ case 12:
+ vmode->mtmdsclock = (u64)vmode->mpixelclock * 3 / 2;
+ break;
+ case 10:
+ vmode->mtmdsclock = (u64)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 tmdsclk = %d\n", vmode->mtmdsclock);
+
/* Set up HDMI_FC_INVIDCONF */
inv_val = (hdmi->hdmi_data.hdcp_enable ||
(dw_hdmi_support_scdc(hdmi) &&
--
2.22.0
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