[Bug 46800] [SNB] Full/Limited Color range not functional

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=46800

--- Comment #10 from Paul Owen <paul at starstreak.net> ---
> It's also available in my git tree here:https://gitorious.org/vsyrjala/linux/commits/rgb_quant_range2
>
> I wasn't able to test the AVI infoframe stuff as my TV doesn't support it. But
> otherwise it seems to work as intended, ie. the driver changes to limited range
> when a CEA video mode (except 640x480) is used, and otherwise uses full range.
>
> My TV seems fairly happy with it, assuming I haven't changed the defaults on
> the TV side. This TV allows me to select the quantization range in CEA modes,
> and it remembers the selection for each mode. The default I assume is limited
> range for those. For non-CEA modes the TV is hardcoded to use full range,
> without any option to override it.
>
> As for xorg.conf, I'll leave stuff like that for Chris to decide.
>
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>  I finally tried this out yesterday, all seems to work okay with one
(potential) issue. I set a modeline to try (fractional framerate issues
aside) set a mode for 1280x720 @ 59.94Hz. When switching to this mode the
automatic setting seems to set the range to full. As noted it's fine on
1280x720 @ 50Hz and @ 60Hz. Equally it works fine if explicitly setting
Limited Range. I cannot test 1920x1080 modes since the TV doesn't support
full HD but my guess would be the same thing would be seen for 23.976Hz. Of
course this could all be but a blip.

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