tree df7ce98b79674d78b29fb050c21be46c1f69ea58
parent 8a94b0aa372ebf7375c8ea861cb9bbf84b39d2df
author Hai Li <hali@codeaurora.org> 1438019385 -0400
committer Rob Clark <robdclark@gmail.com> 1439677642 -0400

drm/msm: Enable clocks during enable/disable_vblank() callbacks

AHB clock should be enabled before accessing registers during
enable/disable_vblank(). Since these 2 callbacks are called in
atomic context while clk_prepare may cause thread sleep, a work
is scheduled to control vblanks.

v2: fixup spinlock initialization

Signed-off-by: Hai Li <hali@codeaurora.org>
[add comment about cancel_work_sync() before drm_irq_uninstall()]
Signed-off-by: Rob Clark <robdclark@gmail.com>