Chris Wilson 14667a4bde drm/i915: Finish any pending operations on the framebuffer before disabling ... Similar to the case where we are changing from one framebuffer to another, we need to be sure that there are no pending WAIT_FOR_EVENTs on the pipe for the current framebuffer before switching. If we disable the pipe, and then try to execute a WAIT_FOR_EVENT it will block indefinitely and cause a GPU hang. We attempted to fix this in commit 85345517fe (drm/i915: Retire any pending operations on the old scanout when switching) for the case of mode switching, but this leaves the condition where we are switching off the pipe vulnerable. There still remains the race condition were a display may be unplugged, switched off by the core, a uevent sent to notify the DDX and the DDX may issue a WAIT_FOR_EVENT before it processes the uevent. This window does not exist if the pipe is only switched off in response to the uevent. Time to make sure that is so... Reported-by: Francis Leblanc <Francis.Leblanc-Lebeau@verint.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=36515 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=45413 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com> [danvet: fixup spelling in comment, noticed by Eugeni.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>		2012-04-09 21:53:30 +02:00
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drm	drm/i915: Finish any pending operations on the framebuffer before disabling	2012-04-09 21:53:30 +02:00
stub	i915: select VIDEO_OUTPUT_CONTROL for ACPI_VIDEO	2011-04-13 09:10:25 +10:00
vga	drivers/gpu/vga/vgaarb.c: add missing kfree	2011-11-22 20:21:10 +00:00
Makefile	gpu: Add Intel GMA500(Poulsbo) Stub Driver	2010-10-26 11:00:13 +10:00