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    drm/i915: Restore fences after resume and GPU resets · 19b2dbde
    Chris Wilson 提交于
    Stéphane Marchesin found that fences for pinned objects (i.e. the
    scanout) were not being restored upon resume, leading to corruption on
    the display and reference counting issues. This is due to a bug in
    
    commit 312817a3 [2.6.38]
    Author: Chris Wilson <chris@chris-wilson.co.uk>
    Date:   Mon Nov 22 11:50:11 2010 +0000
    
        drm/i915: Only save and restore fences for UMS
    
    that zapped the pinned fences even though they were in use.
    Fortuitously, whilst we forced a VT switch during suspend and resume,
    no fences were ever pinned at the time. However, we now can do
    switchless S3 transitions and so the old bug finally surfaces.
    Reported-by: NStéphane Marchesin <marcheu@chromium.org>
    Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
    Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
    Cc: Stéphane Marchesin <marcheu@chromium.org>
    Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
    19b2dbde
i915_drv.h 60.0 KB