An external Thunderbolt GPU can neither drive the laptop's panel nor be powered off by the platform, so there's no point in registering it with vga_switcheroo. In fact, when the external GPU is runtime suspended, vga_switcheroo will cut power to the internal discrete GPU, resulting in a lockup. Cc: Ben Skeggs <bskeggs@xxxxxxxxxx> Acked-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx> --- drivers/gpu/drm/nouveau/nouveau_vga.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_vga.c b/drivers/gpu/drm/nouveau/nouveau_vga.c index ccb597eac538..a4aacbc0cec8 100644 --- a/drivers/gpu/drm/nouveau/nouveau_vga.c +++ b/drivers/gpu/drm/nouveau/nouveau_vga.c @@ -95,6 +95,10 @@ nouveau_vga_init(struct nouveau_drm *drm) vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode); + /* don't register Thunderbolt eGPU with vga_switcheroo */ + if (pci_is_thunderbolt_attached(dev->pdev)) + return; + if (nouveau_runtime_pm == 1) runtime = true; if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm())) @@ -111,6 +115,11 @@ nouveau_vga_fini(struct nouveau_drm *drm) struct drm_device *dev = drm->dev; bool runtime = false; + vga_client_register(dev->pdev, NULL, NULL, NULL); + + if (pci_is_thunderbolt_attached(dev->pdev)) + return; + if (nouveau_runtime_pm == 1) runtime = true; if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm())) @@ -119,7 +128,6 @@ nouveau_vga_fini(struct nouveau_drm *drm) vga_switcheroo_unregister_client(dev->pdev); if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus()) vga_switcheroo_fini_domain_pm_ops(drm->dev->dev); - vga_client_register(dev->pdev, NULL, NULL, NULL); } -- 2.11.0 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
