[Openchrome-devel] [Bug 96397] legacy modesetting removal breaks CLE266

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Jun 8 22:29:41 UTC 2016


--- Comment #27 from Kevin Brace <kevinbrace at gmx.com> ---
(In reply to Xavier Bachelot from comment #26)

Hi Xavier,

> So with the patch applied and the bios set to CRT only, it works.
> With CRT + TV, 3x5.6b is properly set to 0x04, but 3x5.6c is still set to
> 0x01 rather than 0x00 and thus no display. Forcing 6c to 0x00 gives a
> working display.
> I need to go out now, I'll be back in 2 to 3 hours.

Thanks for testing the patch.
If I think about it, with your hardware, IGA2 is probably not running at this
point since you probably do not have TV connected, and you should keep it that
way for now (I do know that TV out is currently broken. You can hook up a TV if
you can, but when I tested it, it caused a hang. The OS was Ubuntu 10.04 LTS.).
This will likely mean that the IGA2 initialization function (viaIGA2Init) will
never be executed.
I thought the situation was odd, so I looked at UniChrome Pro II documentation.
It says 3X5.6C[0] selects LCDCK PLL source.
LCDCK is for IGA2.
I also looked at viafbdev.c (VIA FB driver), and it appears that the role of
3X5.6C was changed starting with CX700.
I am currently analyzing the source code, and a few patch will probably not be
ready in a few hours.
I hope to have a new patch ready by tomorrow.

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