RE: 2.6.19-rc4-mm2

Hi, Andrew -

I messed around with trying to recreate the workaround for the 24bpp
Radeon stuff for chips that have the problem (like yours does) all
afternoon yesterday, but I never did get it to work. I can't spend any
more time on this right now (boss is after me!) but I will try to do
some more poking around later or next week. Do you think I should submit
a patch that at least enables 24bpp for the chip I have where it
definitely does work? I'm sure that is overly restrictive, but I don't
know which ones work and which are broken at this point. I tried going
to the ATI web site (we have an OEM agreement with them, so I can get
more data that way) but their documents are no better now that they are
part of AMD than they ever were, and I didn't find anything useful.
Grumble! Actually, as more people use linux and Xfree86, they may have
to do a bit better with the specs. One can hope!

If you get a chance before I do, you might look at what Xfree86 does -
they might have the workaround.

/Charlotte

PS - You have your reply-to email address set to
ajwade@alumni.uwaterloo.ca
which evidently is stale, 'cause replying to that bounces.

-----Original Message-----
From: Andrew Wade [mailto:andrew.j.wade@gmail.com]
Sent: Tuesday, November 07, 2006 10:58 AM
To: Richardson, Charlotte
Cc: Andrew Morton; linux-kernel@vger.kernel.org; Kimball Murray;

linux-

fbdev-devel@lists.sourceforge.net
Subject: Re: 2.6.19-rc4-mm2

Hello Charlotte,

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(Sorry, I don't know what timezone you're in, but I went home,

cooked

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supper, ate supper, did two loads of laundry, slept for about seven
hours, ate breakfast, did another load of laundry, and voted, and

now

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I'm back!)

I'm EST (GMT-5). But the hours I'm online are somewhat erratic.

...

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If I can't repro it with this chip, if you want to mess around with

it

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on yours, here's what I think we had to do... I believe the trick

was

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to use 16bpp mode as far as what mode you write to the chip, and

then

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double all the x coordinate values for things like offset, width,

and

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pitch. You would have to do that to the accelerated routines also.

I'd be happy to mess around with the driver, but I won't have much
time to do so until tomorrow. I'll let you know if I find anything,
and of course I'll be happy to test patches.

-ajw