[Bug 55121] Limited color range on screen that is connected via HDMI [SandyBridge]

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=55121


Daniel Vetter <daniel at ffwll.ch> changed:

           What    |Removed                     |Added
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                 CC|                            |daniel at ffwll.ch




--- Comment #3 from Daniel Vetter <daniel at ffwll.ch>  2013-03-18 19:31:26 ---
The commit you've bisect to tries to set the reduced range mode (i.e. 16-240)
automatically according to what the hdmi/dp spec suggests. Which means if you
set up a mode listed in the CEA mode list.

Can you please check what happens when you pick an auto setting in your OSD (if
there is such a thing)?

Next step is to force the newly added xrandr property to what you want, but
currently we don't tell the screen what we've set through the hdmi infoframes.
So I this might not work yet correctly, but require a corresponding manual
setting in the OSD. Iirc hdmi specs under which exact circumstances monitors
must follow the infofram setting, so we might need to implement that and
default to the non-reduced range if possible.

Generally though hdmi corner cases seem to be made of fail unfortunately, so
this might take a few patches to fix properly :(

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