[Intel-gfx] [PATCH] drm/i915: Do a better job at disabling primary plane in the noatomic case.

[Maarten Lankhorst]

When disable_noatomic is called plane_mask is not reliable yet,
and plane_state->visible = true even after disabling the primary plane.

Fix this by unsetting plane->visible if it was visible, and calling
disable_planes with the primary plane as mask.

The other planes are already disabled in intel_sanitize_crtc, so
they don't have to be handled here.

Cc: stable at vger.kernel.org #v4.3, v4.2?
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92655
Tested-by: Tomas Mezzadra <tmezzadra at gmail.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index b5f7493213b7..bc3282ab5ed2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6267,9 +6267,11 @@ static void intel_crtc_disable_noatomic(struct drm_crtc *crtc)
 		WARN_ON(intel_crtc->unpin_work);
 
 		intel_pre_disable_primary(crtc);
+
+		intel_crtc_disable_planes(crtc, 1 << drm_plane_index(crtc->primary));
+		to_intel_plane_state(crtc->primary->state)->visible = false;
 	}
 
-	intel_crtc_disable_planes(crtc, crtc->state->plane_mask);
 	dev_priv->display.crtc_disable(crtc);
 	intel_crtc->active = false;
 	intel_update_watermarks(crtc);
-- 
2.1.0