[Intel-gfx] [PATCH 2/2] drm/i915: rc6 in sysfs

Chris Wilson chris at chris-wilson.co.uk
Tue Apr 10 11:42:42 CEST 2012

On Tue, 27 Mar 2012 18:59:39 -0700, Ben Widawsky <ben at bwidawsk.net> wrote:
> Merge rc6 information into the power group for our device. Until now the
> i915 driver has not had any sysfs entries (aside from the connector
> stuff enabled by drm core). Since it seems like we're likely to have
> more in the future I created a new file for sysfs stubs, as well as the
> rc6 sysfs functions which don't really belong elsewhere (perhaps
> i915_suspend, but most of the stuff is in intel_display,c).
> displays rc6 modes enabled (as a hex mask):
> cat /sys/class/drm/card0/power/rc6_enable
> displays #ms GPU has been in rc6 since boot:
> cat /sys/class/drm/card0/power/rc6
> displays #ms GPU has been in deep rc6 since boot:
> cat /sys/class/drm/card0/power/rc6p
> displays #ms GPU has been in deepest rc6 since boot:
> cat /sys/class/drm/card0/power/rc6pp

Last comments, I promise.

/sys/class/drm/card0/power/rc6_uptime_ms or
/sys/class/drm/card0/power/rc6_total[_ms] or

A plain (rc6, rc6p, rc6pp) is just too vague and so may conflict with a
future knob we wish to expose via sysfs.

Chris Wilson, Intel Open Source Technology Centre

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