From patchwork Mon Aug 4 18:15:14 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rodrigo Vivi X-Patchwork-Id: 4674171 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 E9AB2C0338 for ; Tue, 5 Aug 2014 01:14:24 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1968B20173 for ; Tue, 5 Aug 2014 01:14:24 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 36E7A20125 for ; Tue, 5 Aug 2014 01:14:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2E3F96E481; Mon, 4 Aug 2014 18:14:20 -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 B91CD89E5A for ; Mon, 4 Aug 2014 18:14:18 -0700 (PDT) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP; 04 Aug 2014 18:14:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.01,801,1400050800"; d="scan'208";a="583413770" Received: from di-604.jf.intel.com (HELO rdvivi-hillsboro.jf.intel.com) ([10.7.196.77]) by orsmga002.jf.intel.com with ESMTP; 04 Aug 2014 18:14:17 -0700 From: Rodrigo Vivi To: intel-gfx@lists.freedesktop.org Date: Mon, 4 Aug 2014 11:15:14 -0700 Message-Id: <1407176119-5294-2-git-send-email-rodrigo.vivi@intel.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1407176119-5294-1-git-send-email-rodrigo.vivi@intel.com> References: <1407176119-5294-1-git-send-email-rodrigo.vivi@intel.com> Cc: Ben Widawsky , Rodrigo Vivi Subject: [Intel-gfx] [PATCH 2/7] drm/i915: Add thread stall DOP clock gating workaround on Broadwell. X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.15 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=-3.3 required=5.0 tests=BAYES_00, DATE_IN_PAST_06_12, RCVD_IN_DNSWL_MED, 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: Kenneth Graunke Ben and I believe this will be necessary on production hardware. Signed-off-by: Kenneth Graunke Signed-off-by: Ben Widawsky Signed-off-by: Rodrigo Vivi --- drivers/gpu/drm/i915/intel_pm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 684dc5f..f919596 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5412,6 +5412,10 @@ static void gen8_init_clock_gating(struct drm_device *dev) I915_WRITE(GEN8_ROW_CHICKEN, _MASKED_BIT_ENABLE(STALL_DOP_GATING_DISABLE)); + /* WaDisableThreadStallDopClockGating:bdw */ + I915_WRITE(GEN8_ROW_CHICKEN, + _MASKED_BIT_ENABLE(STALL_DOP_GATING_DISABLE)); + /* * This GEN8_CENTROID_PIXEL_OPT_DIS W/A is only needed for * pre-production hardware