linux-kernel - Re: [git pull] drm for rc1

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Message-ID: <20110223185334.GA711@atrey.karlin.mff.cuni.cz>
Date:	Wed, 23 Feb 2011 19:53:34 +0100
From:	Pavel Machek <pavel@....cz>
To:	Chris Wilson <chris@...is-wilson.co.uk>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Dave Airlie <airlied@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dave Airlie <airlied@...ux.ie>, Eric Anholt <eric@...olt.net>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	linux-kernel@...r.kernel.org,
	DRI mailing list <dri-devel@...ts.freedesktop.org>
Subject: Re: [git pull] drm for rc1

Hi!

> > > >>> Highlights:
> > > >>> core/drivers: add support for high precision vblank timestamps
> > > >>> radeon: pageflipping support, Gen2 PCIE support
> > > >>> nouveau: reworked VRAM and VM support
> > > >>> intel: better ILK/SNB powersaving support, Full GTT support
> > > >>
> > > >> Lowlights: it's broken.
> > 
> > Heh, at this point I expected Linus to complain about milion merges in
> > changelog...

(Ok, I chould have put a smiley there :-).

> > > Arg.  It's been ok on my ILK systems, but Chris has found some
> > >issues with out watermarking code iirc; apparently we're underflowing
> > >the display FIFO, causing all sorts of trouble.  If it works before
> > >the pull of Dave's tree, can you bisect?
> > 
> > Watermarking code? What goes on there?
> 
> FIFO watermarks, they determine when the display fetches from the scanout
> buffer to fill the pipe. If we run out of FIFO entries then the display
> flickers at best, at worst we may hard hang the machine.

Thanks for info. I was afraid it was trying to do some watermarks on
video signal, to catch evil videotapers or something like that...

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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