From patchwork Fri Apr 23 04:46:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kai-Heng Feng X-Patchwork-Id: 12219549 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.9 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 96F51C43460 for ; Fri, 23 Apr 2021 04:47:17 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 23499613CC for ; Fri, 23 Apr 2021 04:47:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 23499613CC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=canonical.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 259856EB3E; Fri, 23 Apr 2021 04:47:14 +0000 (UTC) Received: from youngberry.canonical.com (youngberry.canonical.com [91.189.89.112]) by gabe.freedesktop.org (Postfix) with ESMTPS id 563AE6E072; Fri, 23 Apr 2021 04:47:12 +0000 (UTC) Received: from 1-171-214-192.dynamic-ip.hinet.net ([1.171.214.192] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1lZnic-0002E6-5n; Fri, 23 Apr 2021 04:47:07 +0000 From: Kai-Heng Feng To: jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, rodrigo.vivi@intel.com, ville.syrjala@linux.intel.com Subject: [PATCH v2] drm/i915: Invoke BXT _DSM to enable MUX on HP Workstation laptops Date: Fri, 23 Apr 2021 12:46:54 +0800 Message-Id: <20210423044700.247359-1-kai.heng.feng@canonical.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Airlie , intel-gfx@lists.freedesktop.org, open list , "open list:DRM DRIVERS" , Kai-Heng Feng Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On HP Fury G7 Workstations, graphics output is re-routed from Intel GFX to discrete GFX after S3. This is not desirable, because userspace will treat connected display as a new one, losing display settings. The expected behavior is to let discrete GFX drives all external displays. The platform in question uses ACPI method \_SB.PCI0.HGME to enable MUX. The method is inside the BXT _DSM, so add the _DSM and call it accordingly. I also tested some MUX-less and iGPU only laptops with the BXT _DSM, no regression was found. v2: - Forward declare struct pci_dev. Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/3113 References: https://lore.kernel.org/intel-gfx/1460040732-31417-4-git-send-email-animesh.manna@intel.com/ Signed-off-by: Kai-Heng Feng --- drivers/gpu/drm/i915/display/intel_acpi.c | 17 +++++++++++++++++ drivers/gpu/drm/i915/display/intel_acpi.h | 3 +++ drivers/gpu/drm/i915/i915_drv.c | 5 +++++ 3 files changed, 25 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_acpi.c b/drivers/gpu/drm/i915/display/intel_acpi.c index 833d0c1be4f1..c7b57c22dce3 100644 --- a/drivers/gpu/drm/i915/display/intel_acpi.c +++ b/drivers/gpu/drm/i915/display/intel_acpi.c @@ -14,11 +14,16 @@ #define INTEL_DSM_REVISION_ID 1 /* For Calpella anyway... */ #define INTEL_DSM_FN_PLATFORM_MUX_INFO 1 /* No args */ +#define INTEL_DSM_FN_PLATFORM_BXT_MUX_INFO 0 /* No args */ static const guid_t intel_dsm_guid = GUID_INIT(0x7ed873d3, 0xc2d0, 0x4e4f, 0xa8, 0x54, 0x0f, 0x13, 0x17, 0xb0, 0x1c, 0x2c); +static const guid_t intel_bxt_dsm_guid = + GUID_INIT(0x3e5b41c6, 0xeb1d, 0x4260, + 0x9d, 0x15, 0xc7, 0x1f, 0xba, 0xda, 0xe4, 0x14); + static char *intel_dsm_port_name(u8 id) { switch (id) { @@ -176,6 +181,18 @@ void intel_unregister_dsm_handler(void) { } +void intel_bxt_dsm_detect(struct pci_dev *pdev) +{ + acpi_handle dhandle; + + dhandle = ACPI_HANDLE(&pdev->dev); + if (!dhandle) + return; + + acpi_evaluate_dsm(dhandle, &intel_bxt_dsm_guid, INTEL_DSM_REVISION_ID, + INTEL_DSM_FN_PLATFORM_BXT_MUX_INFO, NULL); +} + /* * ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices * Attached to the Display Adapter). diff --git a/drivers/gpu/drm/i915/display/intel_acpi.h b/drivers/gpu/drm/i915/display/intel_acpi.h index e8b068661d22..d2d560d63bb3 100644 --- a/drivers/gpu/drm/i915/display/intel_acpi.h +++ b/drivers/gpu/drm/i915/display/intel_acpi.h @@ -6,15 +6,18 @@ #ifndef __INTEL_ACPI_H__ #define __INTEL_ACPI_H__ +struct pci_dev; struct drm_i915_private; #ifdef CONFIG_ACPI void intel_register_dsm_handler(void); void intel_unregister_dsm_handler(void); +void intel_bxt_dsm_detect(struct pci_dev *pdev); void intel_acpi_device_id_update(struct drm_i915_private *i915); #else static inline void intel_register_dsm_handler(void) { return; } static inline void intel_unregister_dsm_handler(void) { return; } +static inline void intel_bxt_dsm_detect(struct pci_dev *pdev) { return; } static inline void intel_acpi_device_id_update(struct drm_i915_private *i915) { return; } #endif /* CONFIG_ACPI */ diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 785dcf20c77b..57b12068aab4 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -853,6 +853,8 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (ret) goto out_cleanup_gem; + intel_bxt_dsm_detect(pdev); + i915_driver_register(i915); enable_rpm_wakeref_asserts(&i915->runtime_pm); @@ -1215,6 +1217,7 @@ int i915_suspend_switcheroo(struct drm_i915_private *i915, pm_message_t state) static int i915_drm_resume(struct drm_device *dev) { struct drm_i915_private *dev_priv = to_i915(dev); + struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); int ret; disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); @@ -1271,6 +1274,8 @@ static int i915_drm_resume(struct drm_device *dev) intel_gvt_resume(dev_priv); + intel_bxt_dsm_detect(pdev); + enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); return 0;