drm/i915: Add current/max/min GPU freq to sysfs
authorBen Widawsky <ben@bwidawsk.net>
Sat, 8 Sep 2012 02:43:40 +0000 (19:43 -0700)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Thu, 20 Sep 2012 12:23:00 +0000 (14:23 +0200)
commitdf6eedc81d43c2245885c6baeb28d488c8a4dea4
tree1f6216ada7559b58668f28075f425a7cd234ab09
parentc8735b0c3edf9ace136c5c24280c5514d95433f2
drm/i915: Add current/max/min GPU freq to sysfs

Userspace applications such as PowerTOP are interesting in being able to
read the current GPU frequency. The patch itself sets up a generic array
for gen6 attributes so we can easily add other items in the future (and
it also happens to be just about the cleanest way to do this).

The patch is a nice addition to
commit 1ac02185dff3afac146d745ba220dc6672d1d162
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Aug 30 13:26:48 2012 +0200

    drm/i915: add a tracepoint for gpu frequency changes

Reading the GPU frequncy can be done by reading a file like:
/sys/class/drm/card0/render_frequency_mhz

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/i915_sysfs.c