From patchwork Thu Feb 27 22:26:36 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paulo Zanoni X-Patchwork-Id: 3736671 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 8911ABF13A for ; Thu, 27 Feb 2014 22:28:19 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 65EF42021B for ; Thu, 27 Feb 2014 22:28:18 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 311ED2011E for ; Thu, 27 Feb 2014 22:28:17 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2DA271058F4; Thu, 27 Feb 2014 14:28:14 -0800 (PST) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mail-yh0-f41.google.com (mail-yh0-f41.google.com [209.85.213.41]) by gabe.freedesktop.org (Postfix) with ESMTP id 417181058DB for ; Thu, 27 Feb 2014 14:27:19 -0800 (PST) Received: by mail-yh0-f41.google.com with SMTP id f73so3485663yha.14 for ; Thu, 27 Feb 2014 14:27:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=nZe9NUMZ+uK+fN0EkpOydKHQ/vzZeJeb8dc592uc00M=; b=qC3zIvAzERQEkJpx7DTOLgZJ021UZ9/bY94OUajWfbabnzj/F4hbPrsyRsJrXG5BBU lBokNcoRqfJCzsJjNEh8AjpUwGPq5LwH69CmIPlly7hlqFBi0sH94cGMnJ/ud/69EeLj xv7uIHjL+4fQ0dpH2NiWtuwNkDkW68RpDyVM5FOtQ/UAbOcrf2lXOvt9RfT+uaAfpJzB JqVoRuh/te2EqtF8kMzdasPalsNkovcyqBSv+aY04XWH08wmt0oq+gCEm7CPhfph8U3D +j/sU+DJ2sgNfC2OViRl03DVUJRf5aHomr2BqX+o0kwwqc3CM5hTEnoWDMQ8ld2UxQ0S kQzw== X-Received: by 10.236.199.82 with SMTP id w58mr18026665yhn.57.1393540038947; Thu, 27 Feb 2014 14:27:18 -0800 (PST) Received: from localhost.localdomain ([177.132.50.39]) by mx.google.com with ESMTPSA id t58sm18099538yho.20.2014.02.27.14.27.17 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 27 Feb 2014 14:27:18 -0800 (PST) From: Paulo Zanoni To: intel-gfx@lists.freedesktop.org Date: Thu, 27 Feb 2014 19:26:36 -0300 Message-Id: <1393540010-1582-10-git-send-email-przanoni@gmail.com> X-Mailer: git-send-email 1.8.5.3 In-Reply-To: <1393540010-1582-1-git-send-email-przanoni@gmail.com> References: <1393540010-1582-1-git-send-email-przanoni@gmail.com> Cc: Paulo Zanoni Subject: [Intel-gfx] [PATCH 09/23] drm/i915: make PC8 be part of runtime PM suspend/resume X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: intel-gfx-bounces@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, T_DKIM_INVALID, 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: Paulo Zanoni Currently, when our driver becomes idle for i915.pc8_timeout (default: 5s) we enable PC8, so we save some power, but not everything we can. Then, while PC8 is enabled, if we stay idle for more autosuspend_delay_ms (default: 10s) we'll enter runtime PM and put the graphics device in D3 state, saving even more power. The two features are separate things with increasing levels of power savings, but if we disable PC8 we'll never get into D3. While from the modularity point of view it would be nice to keep these features as separate, we have reasons to merge them: - We are not aware of anybody wanting a "PC8 without D3" environment. - If we keep both features as separate, we'll have to to test both PC8 and PC8+D3 code paths. We're already having a major pain to make QA do automated testing of just one thing, testing both paths will cost even more. - Only Haswell+ supports PC8, so if we want to add runtime PM support to, for example, IVB, we'll have to copy some code from the PC8 feature to runtime PM, so merging both features as a single thing will make it easier for enabling runtime PM on other platforms. This patch only does the very basic steps required to have PC8 and runtime PM merged on a single feature: the next patches will take care of cleaning up everything. v2: - Rebase. v3: - Rebase. - Fully remove the deprecated i915 params since Daniel doesn't consider them as part of the ABI. v4: - Rebase. - Fix typo in the commit message. Signed-off-by: Paulo Zanoni --- drivers/gpu/drm/i915/i915_dma.c | 2 -- drivers/gpu/drm/i915/i915_drv.c | 8 +++++++ drivers/gpu/drm/i915/i915_drv.h | 7 +++--- drivers/gpu/drm/i915/i915_params.c | 10 --------- drivers/gpu/drm/i915/intel_display.c | 43 ++++++++---------------------------- drivers/gpu/drm/i915/intel_drv.h | 3 ++- drivers/gpu/drm/i915/intel_pm.c | 1 - 7 files changed, 23 insertions(+), 51 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 7688abc..da0b2ee 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1818,8 +1818,6 @@ int i915_driver_unload(struct drm_device *dev) cancel_work_sync(&dev_priv->gpu_error.work); i915_destroy_error_state(dev); - cancel_delayed_work_sync(&dev_priv->pc8.enable_work); - if (dev->pdev->msi_enabled) pci_disable_msi(dev->pdev); diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 2d05d7c..983ab56 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -850,6 +850,9 @@ static int i915_runtime_suspend(struct device *device) DRM_DEBUG_KMS("Suspending device\n"); + if (HAS_PC8(dev)) + __hsw_do_enable_pc8(dev_priv); + i915_gem_release_all_mmaps(dev_priv); del_timer_sync(&dev_priv->gpu_error.hangcheck_timer); @@ -864,6 +867,7 @@ static int i915_runtime_suspend(struct device *device) */ intel_opregion_notify_adapter(dev, PCI_D1); + DRM_DEBUG_KMS("Device suspended\n"); return 0; } @@ -880,6 +884,10 @@ static int i915_runtime_resume(struct device *device) intel_opregion_notify_adapter(dev, PCI_D0); dev_priv->pm.suspended = false; + if (HAS_PC8(dev)) + __hsw_do_disable_pc8(dev_priv); + + DRM_DEBUG_KMS("Device resumed\n"); return 0; } diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index dcaa130..f53e77d 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1299,6 +1299,10 @@ struct ilk_wm_values { /* * This struct tracks the state needed for the Package C8+ feature. * + * TODO: we're merging the Package C8+ feature with the runtime PM support. To + * avoid having to update the documentation at each patch of the series, we'll + * do a final update at the end. + * * Package states C8 and deeper are really deep PC states that can only be * reached when all the devices on the system allow it, so even if the graphics * device allows PC8+, it doesn't mean the system will actually get to these @@ -1352,7 +1356,6 @@ struct i915_package_c8 { bool enabled; int disable_count; struct mutex lock; - struct delayed_work enable_work; struct { uint32_t deimr; @@ -1968,8 +1971,6 @@ struct i915_params { unsigned int preliminary_hw_support; int disable_power_well; int enable_ips; - int enable_pc8; - int pc8_timeout; int invert_brightness; /* leave bools at the end to not create holes */ bool enable_hangcheck; diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index 3b48258..5bf38f9 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -42,8 +42,6 @@ struct i915_params i915 __read_mostly = { .disable_power_well = 1, .enable_ips = 1, .fastboot = 0, - .enable_pc8 = 1, - .pc8_timeout = 5000, .prefault_disable = 0, .reset = true, .invert_brightness = 0, @@ -134,14 +132,6 @@ module_param_named(fastboot, i915.fastboot, bool, 0600); MODULE_PARM_DESC(fastboot, "Try to skip unnecessary mode sets at boot time (default: false)"); -module_param_named(enable_pc8, i915.enable_pc8, int, 0600); -MODULE_PARM_DESC(enable_pc8, - "Enable support for low power package C states (PC8+) (default: true)"); - -module_param_named(pc8_timeout, i915.pc8_timeout, int, 0600); -MODULE_PARM_DESC(pc8_timeout, - "Number of msecs of idleness required to enter PC8+ (default: 5000)"); - module_param_named(prefault_disable, i915.prefault_disable, bool, 0600); MODULE_PARM_DESC(prefault_disable, "Disable page prefaulting for pread/pwrite/reloc (default:false). " diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index ce582eb..788b165 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -6614,7 +6614,7 @@ static void hsw_restore_lcpll(struct drm_i915_private *dev_priv) /* Make sure we're not on PC8 state before disabling PC8, otherwise * we'll hang the machine! */ - gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL); + gen6_gt_force_wake_get_no_rpm(dev_priv, FORCEWAKE_ALL); if (val & LCPLL_POWER_DOWN_ALLOW) { val &= ~LCPLL_POWER_DOWN_ALLOW; @@ -6648,14 +6648,16 @@ static void hsw_restore_lcpll(struct drm_i915_private *dev_priv) DRM_ERROR("Switching back to LCPLL failed\n"); } - gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL); + gen6_gt_force_wake_put_no_rpm(dev_priv, FORCEWAKE_ALL); } -static void __hsw_do_enable_pc8(struct drm_i915_private *dev_priv) +void __hsw_do_enable_pc8(struct drm_i915_private *dev_priv) { struct drm_device *dev = dev_priv->dev; uint32_t val; + WARN_ON(!HAS_PC8(dev)); + DRM_DEBUG_KMS("Enabling package C8+\n"); dev_priv->pc8.enabled = true; @@ -6671,22 +6673,6 @@ static void __hsw_do_enable_pc8(struct drm_i915_private *dev_priv) hsw_disable_lcpll(dev_priv, true, true); } -void hsw_enable_pc8_work(struct work_struct *__work) -{ - struct drm_i915_private *dev_priv = - container_of(to_delayed_work(__work), struct drm_i915_private, - pc8.enable_work); - struct drm_device *dev = dev_priv->dev; - - WARN_ON(!HAS_PC8(dev)); - - if (dev_priv->pc8.enabled) - return; - - __hsw_do_enable_pc8(dev_priv); - intel_runtime_pm_put(dev_priv); -} - static void __hsw_enable_package_c8(struct drm_i915_private *dev_priv) { WARN_ON(!mutex_is_locked(&dev_priv->pc8.lock)); @@ -6697,15 +6683,16 @@ static void __hsw_enable_package_c8(struct drm_i915_private *dev_priv) if (dev_priv->pc8.disable_count != 0) return; - schedule_delayed_work(&dev_priv->pc8.enable_work, - msecs_to_jiffies(i915.pc8_timeout)); + intel_runtime_pm_put(dev_priv); } -static void __hsw_do_disable_package_c8(struct drm_i915_private *dev_priv) +void __hsw_do_disable_pc8(struct drm_i915_private *dev_priv) { struct drm_device *dev = dev_priv->dev; uint32_t val; + WARN_ON(!HAS_PC8(dev)); + DRM_DEBUG_KMS("Disabling package C8+\n"); hsw_restore_lcpll(dev_priv); @@ -6728,8 +6715,6 @@ static void __hsw_do_disable_package_c8(struct drm_i915_private *dev_priv) static void __hsw_disable_package_c8(struct drm_i915_private *dev_priv) { - struct drm_device *dev = dev_priv->dev; - WARN_ON(!mutex_is_locked(&dev_priv->pc8.lock)); WARN(dev_priv->pc8.disable_count < 0, "pc8.disable_count: %d\n", dev_priv->pc8.disable_count); @@ -6738,14 +6723,7 @@ static void __hsw_disable_package_c8(struct drm_i915_private *dev_priv) if (dev_priv->pc8.disable_count != 1) return; - WARN_ON(!HAS_PC8(dev)); - - cancel_delayed_work_sync(&dev_priv->pc8.enable_work); - if (!dev_priv->pc8.enabled) - return; - intel_runtime_pm_get(dev_priv); - __hsw_do_disable_package_c8(dev_priv); } void hsw_enable_package_c8(struct drm_i915_private *dev_priv) @@ -6803,9 +6781,6 @@ static void hsw_update_package_c8(struct drm_device *dev) if (!HAS_PC8(dev_priv->dev)) return; - if (!i915.enable_pc8) - return; - mutex_lock(&dev_priv->pc8.lock); allow = hsw_can_enable_package_c8(dev_priv); diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index a4ffc02..ea24eae 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -720,7 +720,8 @@ unsigned long intel_gen4_compute_page_offset(int *x, int *y, unsigned int bpp, unsigned int pitch); void intel_display_handle_reset(struct drm_device *dev); -void hsw_enable_pc8_work(struct work_struct *__work); +void __hsw_do_enable_pc8(struct drm_i915_private *dev_priv); +void __hsw_do_disable_pc8(struct drm_i915_private *dev_priv); void hsw_enable_package_c8(struct drm_i915_private *dev_priv); void hsw_disable_package_c8(struct drm_i915_private *dev_priv); void intel_dp_get_m_n(struct intel_crtc *crtc, diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 50b80bb..d68fee2 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5789,7 +5789,6 @@ void intel_pm_setup(struct drm_device *dev) dev_priv->pc8.irqs_disabled = false; dev_priv->pc8.enabled = false; dev_priv->pc8.disable_count = 1; /* requirements_met */ - INIT_DELAYED_WORK(&dev_priv->pc8.enable_work, hsw_enable_pc8_work); INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work, intel_gen6_powersave_work); }