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| author | Ben Widawsky <ben@bwidawsk.net> | 2011-04-25 11:23:07 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-05-10 13:56:46 -0700 |
| commit | fcca7926299944841569515da321bef9655b7703 (patch) | |
| tree | 3d3961db5e3d1821bd68c3c09365f9e557e61d55 /scripts/patch-kernel | |
| parent | drm/i915: proper use of forcewake (diff) | |
| download | linux-fcca7926299944841569515da321bef9655b7703.tar.gz linux-fcca7926299944841569515da321bef9655b7703.zip | |
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>
Diffstat (limited to 'scripts/patch-kernel')
0 files changed, 0 insertions, 0 deletions