From: Matthew Garrett <mjg59@srcf.ucam.org>
To: "Michel Dänzer" <michel@daenzer.net>
Cc: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
Mario Kleiner <mario.kleiner@tuebingen.mpg.de>
Subject: Re: [RFC] Reduce idle vblank wakeups
Date: Wed, 16 Nov 2011 17:11:22 +0000 [thread overview]
Message-ID: <20111116171122.GA28222@srcf.ucam.org> (raw)
In-Reply-To: <1321462995.3794.18.camel@thor.local>
On Wed, Nov 16, 2011 at 06:03:15PM +0100, Michel Dänzer wrote:
> I thought the main reason for the delay wasn't broken hardware but to
> avoid constantly ping-ponging the vblank IRQ between on and off with
> apps which regularly neeed the vblank counter value, as that could make
> the counter unreliable. Maybe I'm misremembering though.
If turning it on and off results in the counter value being wrong then
surely that's a hardware problem? I've tested that turning it on and off
between every IRQ still gives valid counter values on sandybridge.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2011-11-16 17:11 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-16 14:20 [RFC] Reduce idle vblank wakeups Matthew Garrett
2011-11-16 14:20 ` [RFC 1/3] drm: Make drm_vblank_offdelay per-device Matthew Garrett
2011-11-16 14:20 ` [RFC 2/3] drm: Handle the vblank_offdelay=0 case properly Matthew Garrett
2011-11-16 14:20 ` [RFC 3/3] i915: Drop vblank_offdelay Matthew Garrett
2011-11-16 14:32 ` [RFC] Reduce idle vblank wakeups Adam Jackson
2011-11-16 17:03 ` Michel Dänzer
2011-11-16 17:11 ` Matthew Garrett [this message]
2011-11-16 17:53 ` [Intel-gfx] " Andrew Lutomirski
2011-11-16 18:27 ` Mario Kleiner
2011-11-16 18:48 ` Matthew Garrett
2011-11-17 0:26 ` Mario Kleiner
2011-11-17 2:19 ` Matthew Garrett
2011-11-17 5:36 ` [Intel-gfx] " Andrew Lutomirski
2011-11-17 5:39 ` [RFC PATCH] drm: Fix off-by-one races on vblank disable Andy Lutomirski
2011-11-17 8:30 ` Michel Dänzer
2011-11-17 15:39 ` Andrew Lutomirski
2011-11-17 22:54 ` Mario Kleiner
2011-11-17 23:03 ` Andrew Lutomirski
2011-11-17 20:36 ` [RFC] Reduce idle vblank wakeups Mario Kleiner
2011-11-17 20:46 ` Matthew Garrett
2012-05-04 18:31 ` [Intel-gfx] " Matthew Garrett
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20111116171122.GA28222@srcf.ucam.org \
--to=mjg59@srcf.ucam.org \
--cc=dri-devel@lists.freedesktop.org \
--cc=intel-gfx@lists.freedesktop.org \
--cc=mario.kleiner@tuebingen.mpg.de \
--cc=michel@daenzer.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.