From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Tue, 11 Dec 2012 00:07:12 +0000 (+0100)
Subject: drm: refcounting for crtc framebuffers
X-Git-Tag: v3.9-rc1~83^2~38^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b0d1232589df5575c5971224ac4cb30e7e525884;p=pandora-kernel.git

drm: refcounting for crtc framebuffers

With the prep patch to encapsulate ->set_crtc calls, this is now
rather easy. Hooray for inconsistent semantics between ->set_crtc and
->page_flip, where the driver callback is supposed to update the fb
pointer, and ->update_plane, where the drm core does the same.

Also, since the drm core functions check crtc->fb before calling into
driver callbacks, we can't really reduce the critical sections
protected by the mode_config locks.

Reviewed-by: Rob Clark <rob@ti.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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