From patchwork Wed Feb 10 08:33:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Almahallawy, Khaled" X-Patchwork-Id: 12080097 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3B928C433E6 for ; Wed, 10 Feb 2021 08:32:02 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D777664E25 for ; Wed, 10 Feb 2021 08:32:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D777664E25 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5F03C6EB12; Wed, 10 Feb 2021 08:31:55 +0000 (UTC) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by gabe.freedesktop.org (Postfix) with ESMTPS id F219B89BF4; Wed, 10 Feb 2021 08:31:53 +0000 (UTC) IronPort-SDR: FRlQP5hcI301hR7jBP5ev9S6gVOOSk8NrhfMbVm07GhdcNslCbkE7mlDwvkhWBbaL6ilyL/gvL dhSTQeutNmCw== X-IronPort-AV: E=McAfee;i="6000,8403,9890"; a="161183226" X-IronPort-AV: E=Sophos;i="5.81,167,1610438400"; d="scan'208";a="161183226" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Feb 2021 00:31:35 -0800 IronPort-SDR: 7/5C9DyRREDl6tV9ed8o8ID1Gt1sGDSjYsDntFtBNlPuY5Fhp05Ta/RFTcxZ30h1jd5vUWbeaR hpcZFgXosmVA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,167,1610438400"; d="scan'208";a="361212728" Received: from kialmah1-desk.jf.intel.com ([10.23.15.164]) by fmsmga007.fm.intel.com with ESMTP; 10 Feb 2021 00:31:35 -0800 From: Khaled Almahallawy To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [RFC PATCH 2/2] drm/i915/dp: Retry AUX requests 7 times. Date: Wed, 10 Feb 2021 00:33:38 -0800 Message-Id: <20210210083338.100068-2-khaled.almahallawy@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210210083338.100068-1-khaled.almahallawy@intel.com> References: <20210210083338.100068-1-khaled.almahallawy@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: seanpaul@chromium.org, Khaled Almahallawy Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Given that intel_dp_aux_xfer retries 5 times, so configure drm_dpcd_access to retry only 7 times, which means the max number of retries for i915 = 7 * 5 = 35 times. Signed-off-by: Khaled Almahallawy --- drivers/gpu/drm/i915/display/intel_dp_aux.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c b/drivers/gpu/drm/i915/display/intel_dp_aux.c index eaebf123310a..73d711a94000 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c @@ -688,5 +688,7 @@ void intel_dp_aux_init(struct intel_dp *intel_dp) encoder->base.name); intel_dp->aux.transfer = intel_dp_aux_transfer; + /* Follow DP specs*/ + intel_dp->aux.num_retries = 7; cpu_latency_qos_add_request(&intel_dp->pm_qos, PM_QOS_DEFAULT_VALUE); }