diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2012-07-02 10:51:03 -0400 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-07-03 16:09:21 -0400 |
| commit | c4de7b0ffda2bb4843fd7f1052d0a2bb90bd08a5 (patch) | |
| tree | b6806b54c43e44dd15e1bf7bf3480a4f47b8edcd /drivers/gpu/drm/i915/intel_acpi.c | |
| parent | 990bbdadabaa51828e475eda86ee5720a4910cc3 (diff) | |
drm/i915: Implement w/a for sporadic read failures on waking from rc6
As a w/a to prevent reads sporadically returning 0, we need to wait for
the GT thread to return to TC0 before proceeding to read the registers.
v2: adapt for Haswell changes (Eugeni).
v3: use wait_for_atomic_us for thread status polling.
v3: *really* use wait_for_atomic for polling.
References: https://bugs.freedesktop.org/show_bug.cgi?id=50243
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Acked-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_acpi.c')
0 files changed, 0 insertions, 0 deletions