drm/radeon/kms: make sure display hw is disabled when suspending

Disable the display hw when suspending.
Should fix bug:
https://bugzilla.redhat.com/show_bug.cgi?id=522393

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index db338522191f..f10faed21567 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -713,6 +713,7 @@ int radeon_suspend_kms(struct drm_device *dev, pm_message_t state)
 {
         struct radeon_device *rdev;
         struct drm_crtc *crtc;
+        struct drm_connector *connector;
         int r;
 
         if (dev == NULL || dev->dev_private == NULL) {
@@ -725,6 +726,12 @@ int radeon_suspend_kms(struct drm_device *dev, pm_message_t state)
 
         if (rdev->powered_down)
                 return 0;
+
+        /* turn off display hw */
+        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+                drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
+        }
+
         /* unpin the front buffers */
         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
                 struct radeon_framebuffer *rfb = to_radeon_framebuffer(crtc->fb);