[PATCH v2 3/7] drm/i915: Fix fbdev sprite disable code

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

plane->enabled is never set, so this code didn't do anything.

Fix the code for sprites by calling the new drm_plane_force_disable()
function. That means the plane will remain off until someone explicitly
turns it back on.

And do the same for cursors and the old video overlays, since we only
want to see the primary plane for fbdev.

v2: Disable sprites/cursors until explicitly re-enabled

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 16 ++++++++++++++++
 drivers/gpu/drm/i915/intel_drv.h     |  1 +
 drivers/gpu/drm/i915/intel_fb.c      |  9 ++-------
 3 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 944b6d5..1d1a3fd 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9842,3 +9842,19 @@ intel_display_print_error_state(struct drm_i915_error_state_buf *m,
 	}
 }
 #endif
+
+void intel_disable_cursors_and_sprites(struct drm_device *dev)
+{
+	struct drm_crtc *crtc;
+	struct drm_plane *plane;
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		intel_crtc_dpms_overlay(to_intel_crtc(crtc), false);
+		intel_crtc_cursor_set(crtc, NULL, 0, 0, 0);
+	}
+
+	list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
+		if (plane->fb)
+			drm_plane_force_disable(plane);
+	}
+}
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index d0a8c1a..f8e76cf 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -800,5 +800,6 @@ extern bool intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev,
 extern bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev,
 						 enum transcoder pch_transcoder,
 						 bool enable);
+extern void intel_disable_cursors_and_sprites(struct drm_device *dev);
 
 #endif /* __INTEL_DRV_H__ */
diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c
index 5fe525a..b34ccf3 100644
--- a/drivers/gpu/drm/i915/intel_fb.c
+++ b/drivers/gpu/drm/i915/intel_fb.c
@@ -293,22 +293,17 @@ void intel_fb_restore_mode(struct drm_device *dev)
 {
 	int ret;
 	drm_i915_private_t *dev_priv = dev->dev_private;
-	struct drm_mode_config *config = &dev->mode_config;
-	struct drm_plane *plane;
 
 	if (INTEL_INFO(dev)->num_pipes == 0)
 		return;
 
 	drm_modeset_lock_all(dev);
 
+	intel_disable_cursors_and_sprites(dev);
+
 	ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
 	if (ret)
 		DRM_DEBUG("failed to restore crtc mode\n");
 
-	/* Be sure to shut off any planes that may be active */
-	list_for_each_entry(plane, &config->plane_list, head)
-		if (plane->enabled)
-			plane->funcs->disable_plane(plane);
-
 	drm_modeset_unlock_all(dev);
 }
-- 
1.8.1.5