From patchwork Tue Oct 10 12:17:52 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vidya Srinivas X-Patchwork-Id: 9995961 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 4F5CB60216 for ; Tue, 10 Oct 2017 12:09:57 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4140026E3C for ; Tue, 10 Oct 2017 12:09:57 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 345202858D; Tue, 10 Oct 2017 12:09:57 +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 6535B2858C for ; Tue, 10 Oct 2017 12:09:54 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 03EF66E441; Tue, 10 Oct 2017 12:09:54 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id B28D06E43F for ; Tue, 10 Oct 2017 12:09:52 +0000 (UTC) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 10 Oct 2017 05:09:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos; i="5.42,504,1500966000"; d="scan'208"; a="1023630252" Received: from vsrini4-ubuntu-intel.iind.intel.com ([10.223.25.59]) by orsmga003.jf.intel.com with ESMTP; 10 Oct 2017 05:09:50 -0700 From: Vidya Srinivas To: intel-gfx@lists.freedesktop.org Date: Tue, 10 Oct 2017 17:47:52 +0530 Message-Id: <1507637878-17165-9-git-send-email-vidya.srinivas@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1507637878-17165-1-git-send-email-vidya.srinivas@intel.com> References: <1507637878-17165-1-git-send-email-vidya.srinivas@intel.com> Subject: [Intel-gfx] [PATCH 08/14] drm/i915/skl+: nv12 workaround disable WM level 1-7 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 From: Mahesh Kumar Display Workaround #0826 (SKL:ALL BXT:ALL) & #1059(CNL:A) Hardware sometimes fails to wake memory from pkg C states fetching the last few lines of planar YUV 420 (NV12) planes. This causes intermittent underflow and corruption. WA: Disable package C states or do not enable latency levels 1 through 7 (WM1 - WM7) on NV12 planes. Signed-off-by: Mahesh Kumar --- drivers/gpu/drm/i915/intel_pm.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index c99639b..7117011 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4596,6 +4596,17 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv, } } + /* + * Display WA #826 (SKL:ALL, BXT:ALL) & #1059 (CNL:A) + * disable wm level 1-7 on NV12 planes + */ + if (wp->is_nv12 && level && (IS_SKYLAKE(dev_priv) || + IS_BROXTON(dev_priv) || + IS_CNL_REVID(dev_priv, CNL_REVID_A0, CNL_REVID_A0))) { + result->plane_en = false; + return 0; + } + result->plane_res_b = res_blocks; result->plane_res_l = res_lines; result->plane_en = true;