diff options
| author | Ben Widawsky <ben@bwidawsk.net> | 2011-04-25 14:23:07 -0400 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-05-10 16:56:46 -0400 |
| commit | fcca7926299944841569515da321bef9655b7703 (patch) | |
| tree | 3d3961db5e3d1821bd68c3c09365f9e557e61d55 /drivers/gpu/drm/drm_usb.c | |
| parent | b7287d8054d219b3009f7ca82edf24f89fd363e5 (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>
Diffstat (limited to 'drivers/gpu/drm/drm_usb.c')
0 files changed, 0 insertions, 0 deletions