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(parent: b7287d8) | patch
drm/i915: reference counted forcewake
authorBen Widawsky <ben@bwidawsk.net>
Mon, 25 Apr 2011 18:23:07 +0000 (11:23 -0700)
committerKeith Packard <keithp@keithp.com>
Tue, 10 May 2011 20:56:46 +0000 (13:56 -0700)
commitfcca7926299944841569515da321bef9655b7703
tree3d3961db5e3d1821bd68c3c09365f9e557e61d55tree | snapshot (tar.gz zip)
parentb7287d8054d219b3009f7ca82edf24f89fd363e5commit | diff
drm/i915: reference counted forcewake

Provide a reference count to track the forcewake state of the GPU and
give a safe mechanism for userspace to wake the GT. This also potentially
saves a UC read if the GT is known to be awake already.

The reference count is atomic, but the register access and hardware wake
sequence is protected by struct_mutex.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
drivers/gpu/drm/i915/i915_debugfs.c diff | blob | blame | history
drivers/gpu/drm/i915/i915_drv.c diff | blob | blame | history
drivers/gpu/drm/i915/i915_drv.h diff | blob | blame | history
drivers/gpu/drm/i915/i915_irq.c diff | blob | blame | history
drivers/gpu/drm/i915/intel_display.c diff | blob | blame | history