diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c index 65440ec9b6f2..69a84d0197d0 100644 --- a/drivers/gpu/drm/nouveau/nouveau_acpi.c +++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c @@ -211,37 +211,6 @@ static const struct vga_switcheroo_handler nouveau_dsm_handler = { .get_client_id = nouveau_dsm_get_client_id, }; -/* - * Firmware supporting Windows 8 or later do not use _DSM to put the device into - * D3cold, they instead rely on disabling power resources on the parent. - */ -static bool nouveau_pr3_present(struct pci_dev *pdev) -{ - struct pci_dev *parent_pdev = pci_upstream_bridge(pdev); - struct acpi_device *parent_adev; - - if (!parent_pdev) - return false; - - if (!parent_pdev->bridge_d3) { - /* - * Parent PCI bridge is currently not power managed. - * Since userspace can change these afterwards to be on - * the safe side we stick with _DSM and prevent usage of - * _PR3 from the bridge. - */ - pci_d3cold_disable(pdev); - return false; - } - - parent_adev = ACPI_COMPANION(&parent_pdev->dev); - if (!parent_adev) - return false; - - return parent_adev->power.flags.power_resources && - acpi_has_method(parent_adev->handle, "_PR3"); -} - static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out, bool *has_mux, bool *has_opt, bool *has_opt_flags, bool *has_pr3) @@ -249,6 +218,16 @@ static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out acpi_handle dhandle; bool supports_mux; int optimus_funcs; + struct pci_dev *parent_pdev; + + *has_pr3 = false; + parent_pdev = pci_upstream_bridge(pdev); + if (parent_pdev) { + if (parent_pdev->bridge_d3) + *has_pr3 = pci_pr3_present(parent_pdev); + else + pci_d3cold_disable(pdev); + } dhandle = ACPI_HANDLE(&pdev->dev); if (!dhandle) @@ -269,7 +248,6 @@ static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out *has_mux = supports_mux; *has_opt = !!optimus_funcs; *has_opt_flags = optimus_funcs & (1 << NOUVEAU_DSM_OPTIMUS_FLAGS); - *has_pr3 = false; if (optimus_funcs) { uint32_t result; @@ -279,8 +257,6 @@ static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out (result & OPTIMUS_ENABLED) ? "enabled" : "disabled", (result & OPTIMUS_DYNAMIC_PWR_CAP) ? "dynamic power, " : "", (result & OPTIMUS_HDA_CODEC_MASK) ? "hda bios codec supported" : ""); - - *has_pr3 = nouveau_pr3_present(pdev); } }