Chris Wilson 4b60e5cb70 drm/i915: Clear scanline waits after disabling the pipe. ... If we disable the pipe and the GPU is currently waiting on a scanline WAIT_FOR_EVENT, the GPU will hang. Fortunately, there is a magic bit which we can write on i915+ to break this wait after disabling the pipe. References: Bug 29252 - [Arrandale] Hung WAIT_FOR_EVENT when running rss-glx-skyrocket https://bugs.freedesktop.org/show_bug.cgi?id=29252 Bug 28964 - [i965gm] GPU infinite MI_WAIT_FOR_EVENT while watching video in Totem https://bugs.freedesktop.org/show_bug.cgi?id=28964 and many others. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Jesse Barnes <jbarnes@virtuousgeek.org>		2010-09-08 11:29:58 +01:00
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drm	drm/i915: Clear scanline waits after disabling the pipe.	2010-09-08 11:29:58 +01:00
vga	vgaarb: use MIT license	2010-06-03 13:13:34 +10:00
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