[PATCH 4.0 134/148] drm/plane-helper: Adapt cursor hack to transitional helpers

[Greg Kroah-Hartman]

4.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Daniel Vetter <daniel.vetter@xxxxxxxx>

commit 2e7f43c41c042d6fed4d67aceeaae32d8f102e98 upstream.

In

commit f02ad907cd9e7fe3a6405d2d005840912f1ed258
Author: Daniel Vetter <daniel.vetter@xxxxxxxx>
Date:   Thu Jan 22 16:36:23 2015 +0100

    drm/atomic-helpers: Recover full cursor plane behaviour

we've added a hack to atomic helpers to never to vblank waits for
cursor updates through the legacy apis since that's what X expects.
Unfortunately we've (again) forgotten to adjust the transitional
helpers. Do this now.

This fixes regressions for drivers only partially converted over to
atomic (like i915).

Reported-by: Pekka Paalanen <ppaalanen@xxxxxxxxx>
Cc: Pekka Paalanen <ppaalanen@xxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Reviewed-and-tested-by: Mario Kleiner <mario.kleiner.de@xxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/drm_plane_helper.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/gpu/drm/drm_plane_helper.c
+++ b/drivers/gpu/drm/drm_plane_helper.c
@@ -476,6 +476,9 @@ int drm_plane_helper_commit(struct drm_p
 		if (!crtc[i])
 			continue;
 
+		if (crtc[i]->cursor == plane)
+			continue;
+
 		/* There's no other way to figure out whether the crtc is running. */
 		ret = drm_crtc_vblank_get(crtc[i]);
 		if (ret == 0) {


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