drm/switcheroo: track state of switch in drivers.

We need to track the state of the switch in drivers, so that after s/r
we don't resume the card we've explicitly switched off before. Also
don't allow a userspace open to occur if we've switched the gpu off.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.c b/drivers/gpu/drm/nouveau/nouveau_drv.c
index bb170570938..13bb672a16f 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drv.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.c
@@ -171,6 +171,9 @@ nouveau_pci_suspend(struct pci_dev *pdev, pm_message_t pm_state)
         if (pm_state.event == PM_EVENT_PRETHAW)
                 return 0;
 
+        if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+                return 0;
+
         NV_INFO(dev, "Disabling fbcon acceleration...\n");
         nouveau_fbcon_save_disable_accel(dev);
 
@@ -254,6 +257,9 @@ nouveau_pci_resume(struct pci_dev *pdev)
         struct drm_crtc *crtc;
         int ret, i;
 
+        if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+                return 0;
+
         nouveau_fbcon_save_disable_accel(dev);
 
         NV_INFO(dev, "We're back, enabling device...\n");