From patchwork Sat Jul 29 04:59:00 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Praveen Paneri X-Patchwork-Id: 9869757 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7D84660353 for ; Sat, 29 Jul 2017 04:49:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6D6942880B for ; Sat, 29 Jul 2017 04:49:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 61F5D28872; Sat, 29 Jul 2017 04:49:20 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id EF4BD2880B for ; Sat, 29 Jul 2017 04:49:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A02F06E22D; Sat, 29 Jul 2017 04:49:18 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id 946666E22D for ; Sat, 29 Jul 2017 04:49:17 +0000 (UTC) Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga105.fm.intel.com with ESMTP; 28 Jul 2017 21:49:17 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.40,429,1496127600"; d="scan'208";a="113289850" Received: from intel-desktop.iind.intel.com ([10.223.26.163]) by orsmga004.jf.intel.com with ESMTP; 28 Jul 2017 21:49:15 -0700 From: Praveen Paneri To: intel-gfx@lists.freedesktop.org Date: Sat, 29 Jul 2017 10:29:00 +0530 Message-Id: <1501304340-27452-1-git-send-email-praveen.paneri@intel.com> X-Mailer: git-send-email 1.9.1 Cc: Praveen Paneri Subject: [Intel-gfx] [PATCH] drm/i915: enable WaDisableDopClkGating for SKL GT4 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-Virus-Scanned: ClamAV using ClamSMTP This WA is required when decopled frequencies for slice and unslice are enabled. This disables DOP clock gating for SKL GT4. Cc: David Weinehall Signed-off-by: Praveen Paneri Reviewed-by: David Weinehall --- drivers/gpu/drm/i915/intel_pm.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 48785ef..6dee3b6 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -78,6 +78,12 @@ static void gen9_init_clock_gating(struct drm_i915_private *dev_priv) /* WaFbcHighMemBwCorruptionAvoidance:skl,bxt,kbl,cfl */ I915_WRITE(ILK_DPFC_CHICKEN, I915_READ(ILK_DPFC_CHICKEN) | ILK_DPFC_DISABLE_DUMMY0); + + if (IS_SKL_GT4(dev_priv)) { + /* WaDisableDopClockGating */ + I915_WRITE(GEN7_MISCCPCTL, I915_READ(GEN7_MISCCPCTL) + & ~GEN7_DOP_CLOCK_GATE_ENABLE); + } } static void bxt_init_clock_gating(struct drm_i915_private *dev_priv)