drm/nouveau: resurrect headless mode since rework
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 ccae8c26..9cc83f1 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -63,8 +63,9 @@
static int nouveau_noaccel = 0;
module_param_named(noaccel, nouveau_noaccel, int, 0400);
-MODULE_PARM_DESC(modeset, "enable driver");
-static int nouveau_modeset = -1;
+MODULE_PARM_DESC(modeset, "enable driver (default: auto, "
+ "0 = disabled, 1 = enabled, 2 = headless)");
+int nouveau_modeset = -1;
module_param_named(modeset, nouveau_modeset, int, 0400);
static struct drm_driver driver;
@@ -363,7 +364,8 @@
nouveau_pm_fini(dev);
- nouveau_display_fini(dev);
+ if (dev->mode_config.num_crtc)
+ nouveau_display_fini(dev);
nouveau_display_destroy(dev);
nouveau_irq_fini(dev);
@@ -403,13 +405,15 @@
pm_state.event == PM_EVENT_PRETHAW)
return 0;
- NV_INFO(drm, "suspending fbcon...\n");
- nouveau_fbcon_set_suspend(dev, 1);
+ if (dev->mode_config.num_crtc) {
+ NV_INFO(drm, "suspending fbcon...\n");
+ nouveau_fbcon_set_suspend(dev, 1);
- NV_INFO(drm, "suspending display...\n");
- ret = nouveau_display_suspend(dev);
- if (ret)
- return ret;
+ NV_INFO(drm, "suspending display...\n");
+ ret = nouveau_display_suspend(dev);
+ if (ret)
+ return ret;
+ }
NV_INFO(drm, "evicting buffers...\n");
ttm_bo_evict_mm(&drm->ttm.bdev, TTM_PL_VRAM);
@@ -445,8 +449,10 @@
nouveau_client_init(&cli->base);
}
- NV_INFO(drm, "resuming display...\n");
- nouveau_display_resume(dev);
+ if (dev->mode_config.num_crtc) {
+ NV_INFO(drm, "resuming display...\n");
+ nouveau_display_resume(dev);
+ }
return ret;
}
@@ -486,8 +492,10 @@
nouveau_irq_postinstall(dev);
nouveau_pm_resume(dev);
- NV_INFO(drm, "resuming display...\n");
- nouveau_display_resume(dev);
+ if (dev->mode_config.num_crtc) {
+ NV_INFO(drm, "resuming display...\n");
+ nouveau_display_resume(dev);
+ }
return 0;
}