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On i830, there exists a bug where an overlay on pipe B requires the mode clock on pipe A in order to activate. So workaround this by activating pipe A when trying to enable the overlay on pipe B. References: [Bug 29007] GPU hang on video playback with overlay https://bugs.freedesktop.org/show_bug.cgi?id=29007 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> |
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