drm/i915: suspend fbdev device around suspend/hibernate

BugLink: http://bugs.launchpad.net/bugs/971808

commit 3fa016a0b5c5237e9c387fc3249592b2cb5391c6 upstream.

Looking at hibernate overwriting I though it looked like a cursor,
so I tracked down this missing piece to stop the cursor blink
timer. I've no idea if this is sufficient to fix the hibernate
problems people are seeing, but please test it.

Both radeon and nouveau have done this for a long time.

I've run this personally all night hib/resume cycles with no fails.

Reviewed-by: Keith Packard <keithp@keithp.com>
Reported-by: Petr Tesarik <kernel@tesarici.cz>
Reported-by: Stanislaw Gruszka <sgruszka@redhat.com>
Reported-by: Lots of misc segfaults after hibernate across the world.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=37142
Tested-by: Dave Airlie <airlied@redhat.com>
Tested-by: Bojan Smojver <bojan@rexursive.com>
Tested-by: Andreas Hartmann <andihartmann@01019freenet.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 18 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index f6e54b14746..0ad5737338f 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -404,6 +404,10 @@ static int i915_drm_freeze(struct drm_device *dev)
         /* Modeset on resume, not lid events */
         dev_priv->modeset_on_lid = 0;
 
+        console_lock();
+        intel_fbdev_set_suspend(dev, 1);
+        console_unlock();
+
         return 0;
 }
 
@@ -476,6 +480,9 @@ static int i915_drm_thaw(struct drm_device *dev)
 
         dev_priv->modeset_on_lid = 0;
 
+        console_lock();
+        intel_fbdev_set_suspend(dev, 0);
+        console_unlock();
         return error;
 }
 
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index f7d942d0bfa..26a10676bea 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -331,7 +331,7 @@ extern int intel_framebuffer_init(struct drm_device *dev,
                                   struct drm_i915_gem_object *obj);
 extern int intel_fbdev_init(struct drm_device *dev);
 extern void intel_fbdev_fini(struct drm_device *dev);
-
+extern void intel_fbdev_set_suspend(struct drm_device *dev, int state);
 extern void intel_prepare_page_flip(struct drm_device *dev, int plane);
 extern void intel_finish_page_flip(struct drm_device *dev, int pipe);
 extern void intel_finish_page_flip_plane(struct drm_device *dev, int plane);
diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c
index ec49bae7338..d0ce34b78cc 100644
--- a/drivers/gpu/drm/i915/intel_fb.c
+++ b/drivers/gpu/drm/i915/intel_fb.c
@@ -257,6 +257,16 @@ void intel_fbdev_fini(struct drm_device *dev)
         kfree(dev_priv->fbdev);
         dev_priv->fbdev = NULL;
 }
+
+void intel_fbdev_set_suspend(struct drm_device *dev, int state)
+{
+        drm_i915_private_t *dev_priv = dev->dev_private;
+        if (!dev_priv->fbdev)
+                return;
+
+        fb_set_suspend(dev_priv->fbdev->helper.fbdev, state);
+}
+
 MODULE_LICENSE("GPL and additional rights");
 
 void intel_fb_output_poll_changed(struct drm_device *dev)