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>
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index c89c935..12c97cf 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -71,6 +71,12 @@
PLANE_PROP_MAX_NUM
};
+struct msm_vblank_ctrl {
+ struct work_struct work;
+ struct list_head event_list;
+ spinlock_t lock;
+};
+
struct msm_drm_private {
struct msm_kms *kms;
@@ -147,6 +153,8 @@
*/
struct drm_mm mm;
} vram;
+
+ struct msm_vblank_ctrl vblank_ctrl;
};
struct msm_format {