From patchwork Wed Mar 9 06:14:04 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Airlie X-Patchwork-Id: 8542611 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 99E499F38C for ; Wed, 9 Mar 2016 06:14:22 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7B76120251 for ; Wed, 9 Mar 2016 06:14:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6883E20218 for ; Wed, 9 Mar 2016 06:14:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750902AbcCIGOJ (ORCPT ); Wed, 9 Mar 2016 01:14:09 -0500 Received: from mx1.redhat.com ([209.132.183.28]:53585 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751063AbcCIGOI (ORCPT ); Wed, 9 Mar 2016 01:14:08 -0500 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (Postfix) with ESMTPS id 2776FC057EC2; Wed, 9 Mar 2016 06:14:08 +0000 (UTC) Received: from dreadlord-bne-redhat-com.bne.redhat.com (dhcp-40-179.bne.redhat.com [10.64.40.179]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u296E69U004757; Wed, 9 Mar 2016 01:14:06 -0500 From: Dave Airlie To: dri-devel@lists.freedesktop.org, linux-pm@vger.kernel.org, linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] vga_switcheroo: add power support for windows 10 machines. Date: Wed, 9 Mar 2016 16:14:04 +1000 Message-Id: <1457504045-12738-1-git-send-email-airlied@gmail.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM,RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Dave Airlie Windows 10 seems to have standardised power control for the optimus/powerxpress laptops using PR3 power resource hooks. I'm not sure this is definitely the correct place to be doing this, but it works for me here. The ACPI device for the GPU I have is \_SB_.PCI0.PEG_.VID_ but the power resource hooks are on \_SB_.PCI0.PEG_, so this patch creates a new power domain to turn the GPU device parent off using standard ACPI calls. Signed-off-by: Dave Airlie --- drivers/gpu/vga/vga_switcheroo.c | 54 +++++++++++++++++++++++++++++++++++++++- include/linux/vga_switcheroo.h | 3 ++- 2 files changed, 55 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c index 665ab9f..be32cb2 100644 --- a/drivers/gpu/vga/vga_switcheroo.c +++ b/drivers/gpu/vga/vga_switcheroo.c @@ -42,7 +42,7 @@ #include #include #include - +#include /** * DOC: Overview * @@ -997,3 +997,55 @@ vga_switcheroo_init_domain_pm_optimus_hdmi_audio(struct device *dev, return -EINVAL; } EXPORT_SYMBOL(vga_switcheroo_init_domain_pm_optimus_hdmi_audio); + +/* With Windows 10 the runtime suspend/resume can use power + resources on the parent device */ +static int vga_acpi_switcheroo_runtime_suspend(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + int ret; + struct acpi_device *adev; + + ret = dev->bus->pm->runtime_suspend(dev); + if (ret) + return ret; + + ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev); + if (!ret) + acpi_device_set_power(adev->parent, ACPI_STATE_D3_COLD); + return 0; +} + +static int vga_acpi_switcheroo_runtime_resume(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct acpi_device *adev; + int ret; + + ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev); + if (!ret) + acpi_device_set_power(adev->parent, ACPI_STATE_D0); + ret = dev->bus->pm->runtime_resume(dev); + if (ret) + return ret; + + return 0; +} + +int vga_switcheroo_init_parent_pr3_ops(struct device *dev, + struct dev_pm_domain *domain) + +{ + /* copy over all the bus versions */ + if (dev->bus && dev->bus->pm) { + domain->ops = *dev->bus->pm; + domain->ops.runtime_suspend = vga_acpi_switcheroo_runtime_suspend; + domain->ops.runtime_resume = vga_acpi_switcheroo_runtime_resume; + + dev_pm_domain_set(dev, domain); + return 0; + } + dev_pm_domain_set(dev, NULL); + return -EINVAL; +} +EXPORT_SYMBOL(vga_switcheroo_init_parent_pr3_ops); diff --git a/include/linux/vga_switcheroo.h b/include/linux/vga_switcheroo.h index 69e1d4a1..5ce0cbe 100644 --- a/include/linux/vga_switcheroo.h +++ b/include/linux/vga_switcheroo.h @@ -144,6 +144,7 @@ void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev, enum vga_switcheroo int vga_switcheroo_init_domain_pm_ops(struct device *dev, struct dev_pm_domain *domain); void vga_switcheroo_fini_domain_pm_ops(struct device *dev); int vga_switcheroo_init_domain_pm_optimus_hdmi_audio(struct device *dev, struct dev_pm_domain *domain); +int vga_switcheroo_init_parent_pr3_ops(struct device *dev, struct dev_pm_domain *domain); #else static inline void vga_switcheroo_unregister_client(struct pci_dev *dev) {} @@ -163,6 +164,6 @@ static inline void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev, enum static inline int vga_switcheroo_init_domain_pm_ops(struct device *dev, struct dev_pm_domain *domain) { return -EINVAL; } static inline void vga_switcheroo_fini_domain_pm_ops(struct device *dev) {} static inline int vga_switcheroo_init_domain_pm_optimus_hdmi_audio(struct device *dev, struct dev_pm_domain *domain) { return -EINVAL; } - +static inline int vga_switcheroo_init_parent_pr3_ops(struct device *dev, struct dev_pm_domain *domain) { return -EINVAL; } #endif #endif /* _LINUX_VGA_SWITCHEROO_H_ */