drm/i915: implement interruptible sleeps in the overlay code

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At least for the common case of userspace ioctls. When doing a
modeset operation, the wait is still uninterruptible. But considering
that failing to turn off the overlay when switching off the crtc it's
running on hangs the chip, it doesn't complicate matters _very_
much. There's just an unkillable X in addition to a black screen.
BUG() about it and explain in the code.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Eric Anholt <eric@anholt.net>

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Daniel Vetter 2009-09-15 22:57:37 +02:00 • committed by Eric Anholt

parent 5a5a0c64a9

commit 03f77ea597

3 changed files with 159 additions and 34 deletions

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17

drivers/gpu/drm/i915/intel_display.c

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9

drivers/gpu/drm/i915/intel_drv.h

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167

drivers/gpu/drm/i915/intel_overlay.c

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