From patchwork Fri Apr 10 12:02:34 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: sagar.a.kamble@intel.com X-Patchwork-Id: 6194721 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 [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id E5328BF4A6 for ; Fri, 10 Apr 2015 12:01:57 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 27EA1203A0 for ; Fri, 10 Apr 2015 12:01:57 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 0AF252035D for ; Fri, 10 Apr 2015 12:01:56 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CB8186E942; Fri, 10 Apr 2015 05:01:54 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id 1F9FA6E942 for ; Fri, 10 Apr 2015 05:01:53 -0700 (PDT) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga101.jf.intel.com with ESMTP; 10 Apr 2015 05:01:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,556,1422950400"; d="scan'208";a="554082122" Received: from sagar-desktop.iind.intel.com ([10.223.82.56]) by orsmga003.jf.intel.com with ESMTP; 10 Apr 2015 05:01:50 -0700 From: sagar.a.kamble@intel.com To: intel-gfx@lists.freedesktop.org Date: Fri, 10 Apr 2015 17:32:34 +0530 Message-Id: <1428667354-22366-1-git-send-email-sagar.a.kamble@intel.com> X-Mailer: git-send-email 1.8.5 In-Reply-To: <20150410111158.GE26339@strange.amr.corp.intel.com> References: <20150410111158.GE26339@strange.amr.corp.intel.com> Cc: Sagar Kamble Subject: [Intel-gfx] [PATCH 1/1] drm/i915: Disable Render power gating X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_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: Sagar Kamble When RC6 along with Render power gating is enabled, GPU hang happens due to lack of synchronization between GTI and Render power gating. Change-Id: If1614206341eb52a21eadae8c5ebb2655029b50c Signed-off-by: Sagar Kamble --- drivers/gpu/drm/i915/intel_pm.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 9975401..4dd8b41 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4350,9 +4350,12 @@ static void gen9_enable_rc6(struct drm_device *dev) GEN6_RC_CTL_EI_MODE(1) | rc6_mask); - /* 3b: Enable Coarse Power Gating only when RC6 is enabled */ + /* + * 3b: Enable Coarse Power Gating only when RC6 is enabled. + * WaDisableRenderPowerGating:skl,bxt - Render PG need to be disabled with RC6. + */ I915_WRITE(GEN9_PG_ENABLE, (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ? - (GEN9_RENDER_PG_ENABLE | GEN9_MEDIA_PG_ENABLE) : 0); + GEN9_MEDIA_PG_ENABLE : 0); intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);