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From: John Zielinski <grim@undead.cc>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Sergey Vlasov <vsu@altlinux.ru>,
	Linux Frame Buffer Device Development
	<linux-fbdev-devel@lists.sourceforge.net>
Subject: Re: Radeonfb hsync fudge factor?
Date: Wed, 24 Dec 2003 15:52:57 -0500	[thread overview]
Message-ID: <3FE9FCA9.3070107@undead.cc> (raw)
In-Reply-To: <Pine.GSO.4.58.0312241310520.1638@waterleaf.sonytel.be>

Geert Uytterhoeven wrote:

>On Wed, 24 Dec 2003, Sergey Vlasov wrote:
>  
>
>>Probably this fudge factor was needed for some early chips?
>>    
>>
>
>Yep, Mach64 needs one (but atyfb doesn't take care of it yet). So if you switch
>between depths, the display may shift horizontally. I guess this is due to
>different lengths of the dataflow paths for different color depths.
>  
>

How many cards handled by radeonfb need it?   That way we can add a 
fudge or nofudge driver option.  Or put it in the card database if the 
numbers are roughly equal.

I need to see if that's what's causing the sync problems with my friends 
HDTV....

John




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  reply	other threads:[~2003-12-24 20:53 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
2003-12-24 12:12   ` Geert Uytterhoeven
2003-12-24 20:52     ` John Zielinski [this message]
2003-12-24 21:00       ` Sergey Vlasov

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