[Intel-gfx] rfc: kms fix S3 resume

[Shaohua Li]

After enabling kms, my console can't get resumed from S3. Below patch
makes it work, please check.

---
 drivers/gpu/drm/i915/i915_suspend.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux/drivers/gpu/drm/i915/i915_suspend.c
===================================================================
--- linux.orig/drivers/gpu/drm/i915/i915_suspend.c	2009-02-10 13:33:25.000000000 +0800
+++ linux/drivers/gpu/drm/i915/i915_suspend.c	2009-02-10 14:10:46.000000000 +0800
@@ -28,6 +28,7 @@
 #include "drm.h"
 #include "i915_drm.h"
 #include "i915_drv.h"
+#include <drm/drm_crtc_helper.h>
 
 static bool i915_pipe_enabled(struct drm_device *dev, enum pipe pipe)
 {
@@ -519,6 +520,7 @@ int i915_restore_state(struct drm_device
 
 	i915_restore_vga(dev);
 
+	drm_helper_resume_force_mode(dev);
 	return 0;
 }