From: Sergey Vlasov <vsu@altlinux.ru>
To: linux-fbdev-devel@lists.sourceforge.net
Subject: Re: Radeonfb hsync fudge factor?
Date: Wed, 24 Dec 2003 12:18:24 +0300 [thread overview]
Message-ID: <20031224091824.GB11706@master.mivlgu.local> (raw)
In-Reply-To: <3FE8D315.1000904@undead.cc>
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On Tue, Dec 23, 2003 at 06:43:17PM -0500, John Zielinski wrote:
> What's the hsync fudge factor used for?
>
> I noticed that the left edged of my screen moved a bit when I was
> switching between 32/16/8 bpp modes and tracked it down to this.
The same thing here - both with Radeon VE QY and 8500LE (don't remember
the exact chip version). Adding the opposite value to the fbset
parameters puts the image back into the place - so it looks like the hsync
fudge is unneeded at least with these chipsets.
Probably this fudge factor was needed for some early chips?
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next prev parent reply other threads:[~2003-12-24 9:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-23 23:43 Radeonfb hsync fudge factor? John Zielinski
2003-12-24 1:42 ` Benjamin Herrenschmidt
2003-12-24 9:18 ` Sergey Vlasov [this message]
2003-12-24 12:12 ` Geert Uytterhoeven
2003-12-24 20:52 ` John Zielinski
2003-12-24 21:00 ` Sergey Vlasov
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