nouveau: Support Optimus models for vga_switcheroo

Newer nVidia cards with Optimus do not support/use the DSM switching functions.
Instead, it require a DSM function to be called prior to bringing a device into
D3 state. No other _DSM calls are necessary before/after enabling/disabling a
device. Switching between discrete and integrated GPU is not supported by
this Optimus _DSM call, therefore return on the switching method.

Signed-off-by: Peter Lekensteyn <lekensteyn@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c
index f5e98910d17f..f80c5e0762ff 100644
--- a/drivers/gpu/drm/nouveau/nouveau_state.c
+++ b/drivers/gpu/drm/nouveau/nouveau_state.c
@@ -525,6 +525,7 @@ static void nouveau_switcheroo_set_state(struct pci_dev *pdev,
                 printk(KERN_ERR "VGA switcheroo: switched nouveau off\n");
                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                 drm_kms_helper_poll_disable(dev);
+                nouveau_switcheroo_optimus_dsm();
                 nouveau_pci_suspend(pdev, pmm);
                 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
         }