[Bug 94248] MegaChips MCDP2800 LSPCON and ASRock Fatal1ty Z170 Gaming-ITX/ac issues (Broadcast RGB, HDMI output, triple monitor not working)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94248

--- Comment #80 from nw9165-3201 at yahoo.com ---
(In reply to Jani Nikula from comment #79)
> The CEA-861-E spec says we must default to limited color range for CEA modes
> with bpp other than 18. We've probably changed this between 4.4 and 4.8, I
> don't remember exactly.

No, that change actually was introduced in 2013 and it's being discussed over
there:

https://bugzilla.kernel.org/show_bug.cgi?id=94921

So why am I suddenly seeing this regression between 4.4 and 4.8?

Maybe a bug?

(In reply to Jani Nikula from comment #79)
> Whichever we default to will be correct for some
> people, and wrong for some others. Thus the neutral option is to go by the
> spec.

Can you please tell me how I can change the default behavior other than
manually setting it via xrandr? I've already asked it in
https://bugs.freedesktop.org/show_bug.cgi?id=96501 but nobody answered.

Is there any way to change the default behavior? As you can see from the
comments in https://bugzilla.kernel.org/show_bug.cgi?id=94921, it's really
quite an issue.

Especially now, since something seems to have broke between 4.4 and 4.8.

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