drm/i915: Wait for all pending operations to the fb before disabling the pipe

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During modeset we have to disable the pipe to reconfigure its timings
and maybe its size. Userspace may have queued up command buffers that
depend upon the pipe running in a certain configuration and so the
commands may become confused across the modeset. At the moment, we use a
less than satisfactory kick-scanline-waits should the GPU hang during
the modeset. It should be more reliable to wait for the pending
operations to complete first, even though we still have a window for
userspace to submit a broken command buffer during the modeset.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Chris Wilson 2012-04-17 10:05:38 +01:00 • committed by Daniel Vetter

parent 46f0f8d120

commit 0f91128d88

1 changed files with 4 additions and 23 deletions

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drivers/gpu/drm/i915/intel_display.c

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