From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84447C433EF for ; Mon, 15 Nov 2021 19:20:53 +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 4BC996008E for ; Mon, 15 Nov 2021 19:20:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 4BC996008E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 692286E5A9; Mon, 15 Nov 2021 19:20:49 +0000 (UTC) Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by gabe.freedesktop.org (Postfix) with ESMTPS id BF8226E530; Mon, 15 Nov 2021 19:20:47 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10169"; a="220401073" X-IronPort-AV: E=Sophos;i="5.87,237,1631602800"; d="scan'208";a="220401073" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Nov 2021 11:20:39 -0800 X-IronPort-AV: E=Sophos;i="5.87,237,1631602800"; d="scan'208";a="506054064" Received: from rakeshr1-mobl1.amr.corp.intel.com (HELO intel.com) ([10.255.37.176]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Nov 2021 11:20:38 -0800 Date: Mon, 15 Nov 2021 14:20:36 -0500 From: Rodrigo Vivi To: Tilak Tangudu Subject: Re: [Intel-gfx] [PATCH] drm/i915: Disable D3Cold in s2idle and runtime pm Message-ID: References: <20211115154054.3220476-1-tilak.tangudu@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211115154054.3220476-1-tilak.tangudu@intel.com> 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: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Mon, Nov 15, 2021 at 09:10:54PM +0530, Tilak Tangudu wrote: > s2idle and runtime pm puts the pci gfx device in D3Hot, ACPI runtime > monitors the pci tree,if it sees complete tree as D3Hot,it transitions > the device to D3Cold.But i915 do not have D3Cold support in S2idle or in > runtime pm. so disabling D3cold in above flows and its FIXME. > > Added pci D3Cold enable/disable in s2idle and runtime suspend/resume > flows. > > Signed-off-by: Tilak Tangudu Just for the clear record, I always preferred the unconditional disallow of d3cold, but it looks some internal experiments for s3/s4 failed with that and this approach here was the safest one, so let's move with this and prevent the d3cold for now and then allow the runtime_pm autosuspend enabled by default everywhere. Reviewed-by: Rodrigo Vivi > --- > drivers/gpu/drm/i915/i915_drv.c | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c > index 46bf3315f616..af6868f12ef0 100644 > --- a/drivers/gpu/drm/i915/i915_drv.c > +++ b/drivers/gpu/drm/i915/i915_drv.c > @@ -1194,6 +1194,14 @@ static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation) > goto out; > } > > + /* > + * FIXME: Temporary hammer to avoid freezing the machine on our DGFX > + * This should be totally removed when we handle the pci states properly > + * on runtime PM and on s2idle cases. > + */ > + if (suspend_to_idle(dev_priv)) > + pci_d3cold_disable(pdev); > + > pci_disable_device(pdev); > /* > * During hibernation on some platforms the BIOS may try to access > @@ -1357,6 +1365,8 @@ static int i915_drm_resume_early(struct drm_device *dev) > > pci_set_master(pdev); > > + pci_d3cold_enable(pdev); > + > disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); > > ret = vlv_resume_prepare(dev_priv, false); > @@ -1533,6 +1543,7 @@ static int intel_runtime_suspend(struct device *kdev) > { > struct drm_i915_private *dev_priv = kdev_to_i915(kdev); > struct intel_runtime_pm *rpm = &dev_priv->runtime_pm; > + struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); > int ret; > > if (drm_WARN_ON_ONCE(&dev_priv->drm, !HAS_RUNTIME_PM(dev_priv))) > @@ -1578,6 +1589,12 @@ static int intel_runtime_suspend(struct device *kdev) > drm_err(&dev_priv->drm, > "Unclaimed access detected prior to suspending\n"); > > + /* > + * FIXME: Temporary hammer to avoid freezing the machine on our DGFX > + * This should be totally removed when we handle the pci states properly > + * on runtime PM and on s2idle cases. > + */ > + pci_d3cold_disable(pdev); > rpm->suspended = true; > > /* > @@ -1616,6 +1633,7 @@ static int intel_runtime_resume(struct device *kdev) > { > struct drm_i915_private *dev_priv = kdev_to_i915(kdev); > struct intel_runtime_pm *rpm = &dev_priv->runtime_pm; > + struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); > int ret; > > if (drm_WARN_ON_ONCE(&dev_priv->drm, !HAS_RUNTIME_PM(dev_priv))) > @@ -1628,6 +1646,7 @@ static int intel_runtime_resume(struct device *kdev) > > intel_opregion_notify_adapter(dev_priv, PCI_D0); > rpm->suspended = false; > + pci_d3cold_enable(pdev); > if (intel_uncore_unclaimed_mmio(&dev_priv->uncore)) > drm_dbg(&dev_priv->drm, > "Unclaimed access during suspend, bios?\n"); > -- > 2.25.1 >