[XS] Change in libgfxinit[main]: common/connector_info: Fix HDMI/DVI default bytes per color setting

[Jérémy Compostella (Code Review)]

Attention is currently required from: Nick Vaccaro, Nico Huber.

Hello Nick Vaccaro, Nico Huber,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/libgfxinit/+/77227?usp=email

to look at the new patch set (#3).

Change subject: common/connector_info: Fix HDMI/DVI default bytes per color setting
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common/connector_info: Fix HDMI/DVI default bytes per color setting

According to the Programming Reference Manual and more specificaly
`TRANS_DDI_FUNC_CTL' register description, A bytes per colors value of
6 (or 10) is not supported by HDMI.

We indeed noticed that if we use a HDMI monitor on the first HDMI port
of a board without eDP, the monitor does not accept the configuration.

This patch ensures that we do not use a default BPC of 6 if the port
is HDMI.

Change-Id: I55e9e63a4da6c6764bae0f1b19132f14fd865cea
Signed-off-by: Jeremy Compostella 
---
M common/hw-gfx-gma-connector_info.adb
1 file changed, 1 insertion(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/libgfxinit refs/changes/27/77227/3