From patchwork Thu Jun 16 12:01:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gupta, Anshuman" X-Patchwork-Id: 12883783 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 7EB25C433EF for ; Thu, 16 Jun 2022 12:02:14 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E252311A4DA; Thu, 16 Jun 2022 12:02:09 +0000 (UTC) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id 90C9B11A4C3; Thu, 16 Jun 2022 12:02:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1655380924; x=1686916924; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=n04pVspeYr1Z4PmeXjJUniNQCilqRGE2M2WlvMC4CqY=; b=P9e9HrxQpEu4mc9kUoEoByAS8nEnzNppMPBmAUTSc0woWqUG+3jRIvVv k4D5kwiyYPUmQvA3YoYfPyyyRsE27+QKFpkTkuGvK/ECLvIUdVazzUeze PeMenqTabPVHeoSa9cuBjSY19uq2UPKKDxi5K1+Etx/GOTTBJ3+cIkePg e5yxQed7w56k0eRGL6Xi6PqWG3d3ri9CDRKgVuoXeNC4lVdHM0tL03h3q mDobXCAN3RwRSblFnnd/wPnqpn0w48uiNfnbCgA+Th6ilO3ilp5DV7r50 JAvWJM0HP/r4Ina0ggW0O64/d5y2bW64aeAI6wc3EcAN7PgnVdkUDmL3s w==; X-IronPort-AV: E=McAfee;i="6400,9594,10379"; a="343189623" X-IronPort-AV: E=Sophos;i="5.91,305,1647327600"; d="scan'208";a="343189623" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Jun 2022 05:01:45 -0700 X-IronPort-AV: E=Sophos;i="5.91,305,1647327600"; d="scan'208";a="713330941" Received: from srr4-3-linux-105-anshuma1.iind.intel.com ([10.223.74.179]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Jun 2022 05:01:42 -0700 From: Anshuman Gupta To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH v2 7/9] drm/i915/rpm: Enable D3Cold VRAM SR Support Date: Thu, 16 Jun 2022 17:31:04 +0530 Message-Id: <20220616120106.24353-8-anshuman.gupta@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20220616120106.24353-1-anshuman.gupta@intel.com> References: <20220616120106.24353-1-anshuman.gupta@intel.com> 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: tilak.tangudu@intel.com, tvrtko.ursulin@intel.com, Anshuman Gupta , Chris Wilson , jon.ewins@intel.com, badal.nilawar@intel.com, rodrigo.vivi@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Intel Client DGFX card supports D3Cold with two option. D3Cold-off zero watt, D3Cold-VRAM Self Refresh. i915 requires to evict the lmem objects to smem in order to support D3Cold-Off, which increases i915 the suspend/resume latency. Enabling VRAM Self Refresh feature optimize the latency with additional power cost which required to retain the lmem. Adding intel_runtime_idle (runtime_idle callback) to enable VRAM_SR, it will be used for policy to choose between D3Cold-off vs D3Cold-VRAM_SR. Since we have introduced i915 runtime_idle callback. It need to be warranted that Runtime PM Core invokes runtime_idle callback when runtime usages count becomes zero. That requires to use pm_runtime_put instead of pm_runtime_put_autosuspend. TODO: GuC interface state save/restore. Cc: Rodrigo Vivi Cc: Chris Wilson Signed-off-by: Anshuman Gupta --- drivers/gpu/drm/i915/i915_driver.c | 26 +++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_runtime_pm.c | 3 +-- 2 files changed, 27 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c index aa1fb15b1f11..fcff5f3fe05e 100644 --- a/drivers/gpu/drm/i915/i915_driver.c +++ b/drivers/gpu/drm/i915/i915_driver.c @@ -1557,6 +1557,31 @@ static int i915_pm_restore(struct device *kdev) return i915_pm_resume(kdev); } +static int intel_runtime_idle(struct device *kdev) +{ + struct drm_i915_private *dev_priv = kdev_to_i915(kdev); + int ret = 1; + + if (!HAS_LMEM_SR(dev_priv)) { + /*TODO: Prepare for D3Cold-Off */ + goto out; + } + + disable_rpm_wakeref_asserts(&dev_priv->runtime_pm); + + ret = intel_pm_vram_sr(dev_priv, true); + if (!ret) + drm_dbg(&dev_priv->drm, "VRAM Self Refresh enabled\n"); + + enable_rpm_wakeref_asserts(&dev_priv->runtime_pm); + +out: + pm_runtime_mark_last_busy(kdev); + pm_runtime_autosuspend(kdev); + + return ret; +} + static int intel_runtime_suspend(struct device *kdev) { struct drm_i915_private *dev_priv = kdev_to_i915(kdev); @@ -1742,6 +1767,7 @@ const struct dev_pm_ops i915_pm_ops = { .restore = i915_pm_restore, /* S0ix (via runtime suspend) event handlers */ + .runtime_idle = intel_runtime_idle, .runtime_suspend = intel_runtime_suspend, .runtime_resume = intel_runtime_resume, }; diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index 6ed5786bcd29..4dade7e8a795 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -492,8 +492,7 @@ static void __intel_runtime_pm_put(struct intel_runtime_pm *rpm, intel_runtime_pm_release(rpm, wakelock); - pm_runtime_mark_last_busy(kdev); - pm_runtime_put_autosuspend(kdev); + pm_runtime_put(kdev); } /**