From: Jonas Karlman <jonas@xxxxxxxxx>
Configure the correct mtmdsclock for deep colors to prepare support
for 10, 12 & 16bit output.
Signed-off-by: Jonas Karlman <jonas@xxxxxxxxx>
Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Reviewed-by: Jernej Škrabec <jernej.skrabec@xxxxxxxx>
---
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 9bad194cfd0a..10f98c9ee77e 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1814,13 +1814,32 @@ 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) &&
--
2.22.0
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