* Re: [Fwd: [PATCH][matroxfb] G450 jittery display on ppc systems]
[not found] ` <443D70A7.8020702@vc.cvut.cz>
@ 2006-04-13 0:11 ` Paul A. Clarke
0 siblings, 0 replies; only message in thread
From: Paul A. Clarke @ 2006-04-13 0:11 UTC (permalink / raw)
To: Petr Vandrovec; +Cc: linux-fbdev-devel, Ian Romanick
Petr Vandrovec wrote:
> Paul A. Clarke wrote:
>> Just a polite nudge on this patch
[...]
> It looks fine to me. Except that I'd like to know why this has to be
> done - is it something common to all DVI displays, or something you got
> hint on from Matrox, or ... ?
I believe it is common to all systems where the initialization code (BIOS,
FCODE, etc.) doesn't leave the card in a completely viable state. It's not a
DVI-specific thing in that I still can't get any DVI signals, but it does appear
from my tests that this line is the most significant line in the patch:
+ matroxfb_DAC_out(PMINFO M1064_XDVICLKCTRL, 0);
And, I got some hints from Matrox. :-)
--
Regards,
Paul Clarke
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