git.maquefel.me Git - linux.git/commit

author	Ben Widawsky <ben@bwidawsk.net>
	Mon, 25 Apr 2011 18:23:07 +0000 (11:23 -0700)
committer	Keith Packard <keithp@keithp.com>
	Tue, 10 May 2011 20:56:46 +0000 (13:56 -0700)
commit	fcca7926299944841569515da321bef9655b7703
tree	3d3961db5e3d1821bd68c3c09365f9e557e61d55	tree \| snapshot
parent	b7287d8054d219b3009f7ca82edf24f89fd363e5	commit \| 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>

ep93xx device tree rework repo: git://git.maquefel.me/linux.git

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drivers/gpu/drm/i915/i915_debugfs.c		diff \| blob \| history
drivers/gpu/drm/i915/i915_drv.c		diff \| blob \| history
drivers/gpu/drm/i915/i915_drv.h		diff \| blob \| history
drivers/gpu/drm/i915/i915_irq.c		diff \| blob \| history
drivers/gpu/drm/i915/intel_display.c		diff \| blob \| history