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drm/bridge: dw-hdmi: set mtmdsclock for deep color 

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
This commit is contained in:
Jonas Karlman 2020-03-04 11:40:42 +01:00 committed by Neil Armstrong
parent bc1a4130fc
commit c6cae70234
1 changed files with 20 additions and 1 deletions
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21
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
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@ -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) &&