[PATCH 4/4] drm/i915: Implement restore_fbdev_mode hook

[ville.syrjala at linux.intel.com]

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

Convert intel_fb_restore_mode to be useable as the
drm_fb_helper.restore_fbdev_mode hook. This will cause all planes to be
disabled when swithing back to fbcon.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_dma.c  |    2 +-
 drivers/gpu/drm/i915/intel_drv.h |    2 +-
 drivers/gpu/drm/i915/intel_fb.c  |   14 ++++++++++----
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index f947926..186308a 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1738,7 +1738,7 @@ void i915_driver_lastclose(struct drm_device * dev)
 	drm_i915_private_t *dev_priv = dev->dev_private;
 
 	if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
-		intel_fb_restore_mode(dev);
+		intel_fb_restore_mode(&dev_priv->fbdev->helper);
 		vga_switcheroo_process_delayed_switch();
 		return;
 	}
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 3e09188..2ec63a8 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -452,7 +452,7 @@ extern int intel_overlay_attrs(struct drm_device *dev, void *data,
 			       struct drm_file *file_priv);
 
 extern void intel_fb_output_poll_changed(struct drm_device *dev);
-extern void intel_fb_restore_mode(struct drm_device *dev);
+extern int intel_fb_restore_mode(struct drm_fb_helper *helper);
 
 extern void assert_pipe(struct drm_i915_private *dev_priv, enum pipe pipe,
 			bool state);
diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c
index 07404ac..51b7fd1 100644
--- a/drivers/gpu/drm/i915/intel_fb.c
+++ b/drivers/gpu/drm/i915/intel_fb.c
@@ -192,6 +192,7 @@ static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 	.gamma_set = intel_crtc_fb_gamma_set,
 	.gamma_get = intel_crtc_fb_gamma_get,
 	.fb_probe = intel_fb_find_or_create_single,
+	.restore_fbdev_mode = intel_fb_restore_mode,
 };
 
 static void intel_fbdev_destroy(struct drm_device *dev,
@@ -272,22 +273,27 @@ void intel_fb_output_poll_changed(struct drm_device *dev)
 	drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 }
 
-void intel_fb_restore_mode(struct drm_device *dev)
+int intel_fb_restore_mode(struct drm_fb_helper *helper)
 {
+	struct drm_device *dev = helper->dev;
 	int ret;
-	drm_i915_private_t *dev_priv = dev->dev_private;
 	struct drm_mode_config *config = &dev->mode_config;
 	struct drm_plane *plane;
 
 	mutex_lock(&dev->mode_config.mutex);
 
-	ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
-	if (ret)
+	ret = drm_fb_helper_restore_fbdev_mode(helper);
+	if (ret) {
 		DRM_DEBUG("failed to restore crtc mode\n");
+		goto out;
+	}
 
 	/* Be sure to shut off any planes that may be active */
 	list_for_each_entry(plane, &config->plane_list, head)
 		plane->funcs->disable_plane(plane);
 
+out:
 	mutex_unlock(&dev->mode_config.mutex);
+
+	return ret;
 }
-- 
1.7.3.4