drm/nouveau: Remove bogus crtc check in pmops_runtime_idle

This both uses the legacy modesetting structures in a racy manner, and
additionally also doesn't even check the right variable (enabled != the
CRTC is actually turned on for atomic).

This fixes issues on my P50 regarding the dedicated GPU not entering
runtime suspend.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: stable@vger.kernel.org
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 775443c..5149033 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -874,22 +874,11 @@ nouveau_pmops_runtime_resume(struct device *dev)
 static int
 nouveau_pmops_runtime_idle(struct device *dev)
 {
-       struct pci_dev *pdev = to_pci_dev(dev);
-       struct drm_device *drm_dev = pci_get_drvdata(pdev);
-       struct nouveau_drm *drm = nouveau_drm(drm_dev);
-       struct drm_crtc *crtc;
-
        if (!nouveau_pmops_runtime()) {
                pm_runtime_forbid(dev);
                return -EBUSY;
        }
 
-       list_for_each_entry(crtc, &drm->dev->mode_config.crtc_list, head) {
-               if (crtc->enabled) {
-                       DRM_DEBUG_DRIVER("failing to power off - crtc active\n");
-                       return -EBUSY;
-               }
-       }
        pm_runtime_mark_last_busy(dev);
        pm_runtime_autosuspend(dev);
        /* we don't want the main rpm_idle to call suspend - we want to autosuspend */