[Bug 94921] Remove illogical/bogus "Automatic" mode from "Broadcast RGB" property

[bugzilla-daemon at bugzilla.kernel.org]

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

--- Comment #22 from Nicholas Stommel (nicholas.stommel at gmail.com) ---
I don't mean to say that the automatic mode selection is an incorrect approach
to solving this problem, in fact it seems to be the only thing that makes sense
given the reality. But it does appear to be fairly unreliable for users who
require either side of the RGB color range (limited/full) and there's quite a
bit of unpleasantness when it fails to select the appropriate range because of
something in the driver code or a quirk of the monitor itself. 

Exposing color range as an i915 kernel parameter while keeping automatic mode
in place would solve both problems. Just like other features of the i915 driver
module, this could be added as a sort of manual override to ensure kernel mode
setting is correct before the initialization of the display server. As a kernel
parameter, this would eliminate the need of compositor workarounds in X and
Wayland. Furthermore, it would be ideal for consumers with either limited or
full color displays experiencing this issue with the automatic driver mode
selecting the incorrect color range.

I apologize for my less than civil reply in the previous comment. This
particular issue is very troubling when I'm stuck on the wrong end. Still...I
think the point merits some thought. I look forward to developments regarding
the improvements you suggested for color space, particularly the "need to take
the bpc value into consideration."

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