From patchwork Sat Mar 30 01:19:20 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sripada, Radhakrishna" X-Patchwork-Id: 10877989 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B825D922 for ; Sat, 30 Mar 2019 01:19:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 93A4F284E8 for ; Sat, 30 Mar 2019 01:19:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6FB0E286B4; Sat, 30 Mar 2019 01:19:17 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, 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 1F25F284E8 for ; Sat, 30 Mar 2019 01:19:17 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 26A1C6E56F; Sat, 30 Mar 2019 01:19:15 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id E80886E56F for ; Sat, 30 Mar 2019 01:19:13 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Mar 2019 18:19:13 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,286,1549958400"; d="scan'208";a="138637982" Received: from invictus.jf.intel.com ([10.54.75.159]) by fmsmga007.fm.intel.com with ESMTP; 29 Mar 2019 18:19:13 -0700 From: Radhakrishna Sripada To: intel-gfx@lists.freedesktop.org Date: Fri, 29 Mar 2019 18:19:20 -0700 Message-Id: <20190330011921.10397-2-radhakrishna.sripada@intel.com> X-Mailer: git-send-email 2.20.0.rc2.7.g965798d1f299 In-Reply-To: <20190315221838.22444-1-radhakrishna.sripada@intel.com> References: <20190315221838.22444-1-radhakrishna.sripada@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v5 2/3] drm/i915: Fix the inconsistent RMW in WA 827 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP RMW is used only in the disable path. Using it in enable path for consistency. Suggested-by: Ville Syrjala Cc: Anusha Srivatsa Signed-off-by: Radhakrishna Sripada --- drivers/gpu/drm/i915/intel_display.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 30aa1e5324f7..f54183761a40 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -471,6 +471,7 @@ skl_wa_827(struct drm_i915_private *dev_priv, int pipe, bool enable) { if (enable) I915_WRITE(CLKGATE_DIS_PSL(pipe), + I915_READ(CLKGATE_DIS_PSL(pipe)) | DUPS1_GATING_DIS | DUPS2_GATING_DIS); else I915_WRITE(CLKGATE_DIS_PSL(pipe),