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Bug#277038: xserver-xfree86: xv in neomagic driver is too slow for dvd playback



Branden,

Unfortunately, I have not had any success finding out what the register pokes
do.  My searches have not yielded any results.  I emailed the submitter of the
earliest patch with this poke (the linux kernel framebuffer).  He has not responded.

I'm not sure how to proceed from here.  Do you have any ideas?

Tony


> On Mon, Oct 18, 2004 at 03:48:03PM -0500, Tony Hill wrote:
> > I hear what you are saying and agree that I'd like to understand what 
> > that register poke does.  I'm doing a little searching right now to 
> > figure it out.
> > 
> > I do know this, the register poke has been present in the linux kernel 
> > framebuffer driver since 2002 
> >
(http://seclists.org/lists/linux-kernel/2002/Jan/att-6384/neofb-0.3.1-linux-2.4.18-pre6.patch),

> > as well as present in XFree86 since April 2003 
> >
(http://cvsweb.xfree86.org/cvsweb/*checkout*/xc/programs/Xserver/hw/xfree86/drivers/neomagic/neo_driver.c?rev=1.67)

> > 
> > Neither the kernel fb team nor the XFree86 team mention what the 
> > register poke does, just that it speeds up framebuffer operations.
> > 
> > So, I'll look into it more, and let you know what I find out.
> 
> Hi Tony,
> 
> Have you had any luck with this?
> 
> -- 
> G. Branden Robinson                |
> Debian GNU/Linux                   |     Cogitationis poenam nemo meretur.
> branden@debian.org                 |
> http://people.debian.org/~branden/ |
> 








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