From: Dave Airlie <airlied@gmail.com>
To: dri-devel@lists.freedesktop.org
Subject: [RFC] drm dynamic power off support
Date: Mon, 10 Sep 2012 14:31:50 +1000 [thread overview]
Message-ID: <1347251515-10136-1-git-send-email-airlied@gmail.com> (raw)
For optimus and powerxpress setups where we can explicitly power off
the GPU I'd like to do this under control of the driver. Now that I've
added X server support for secondary GPUs, it makes sense to start
powering them down more often if we can.
I've tested this code on two laptops, one intel/nouveau one intel/radeon
It works, powertop says I use 5-6W less power.
Caveats:
There is a race at X server start with platform probing code, if
the secondary device is off, we the wrong PCI info for it, I've
got a patch that works around this I'll send to the xorg-devel.
Audio seems to get screwed at least on one machine, we power up
and the alsa callbacks into snd_hda_intel get called but it can't
find the hw properly, need to investigate a bit further.
Dave.
next reply other threads:[~2012-09-10 4:31 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-10 4:31 Dave Airlie [this message]
2012-09-10 4:31 ` [PATCH 1/5] gpu/vga_switcheroo: add driver control power feature Dave Airlie
2012-09-10 4:31 ` [PATCH 2/5] drm: Add initial dnyamic power off feature Dave Airlie
2012-09-10 7:18 ` Daniel Vetter
2012-09-10 8:23 ` Dave Airlie
2012-09-10 8:36 ` Chris Wilson
2012-09-10 10:55 ` Alan Cox
2012-09-10 9:00 ` Daniel Vetter
2012-09-10 11:07 ` Alan Cox
2012-09-10 11:16 ` Dave Airlie
2012-09-10 4:31 ` [PATCH 3/5] nouveau: Add interface to detect optimus support Dave Airlie
2012-09-10 16:25 ` Lekensteyn
2012-09-10 20:24 ` Dave Airlie
2012-09-10 4:31 ` [PATCH 4/5] nouveau: add dynamic gpu power off support Dave Airlie
2012-09-10 16:30 ` Peter Wu
2012-09-10 4:31 ` [PATCH 5/5] radeon: add dynamic " Dave Airlie
2012-09-10 5:04 ` [RFC] drm " Dave Airlie
2012-09-10 8:47 ` Takashi Iwai
2012-09-10 8:50 ` Dave Airlie
2012-09-11 13:32 ` Takashi Iwai
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