From patchwork Thu Jun 18 00:01:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Navare, Manasi" X-Patchwork-Id: 11610975 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 16ED992A for ; Thu, 18 Jun 2020 00:00:20 +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 E9EC320776 for ; Thu, 18 Jun 2020 00:00:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E9EC320776 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8D5BC6E1F3; Thu, 18 Jun 2020 00:00:17 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by gabe.freedesktop.org (Postfix) with ESMTPS id 92BC46E1F4 for ; Thu, 18 Jun 2020 00:00:15 +0000 (UTC) IronPort-SDR: FnHi+gzQg6D2Vp91CHd9iLsIY4GjlJ/LRcPy2xXnZq/3dr5B/u54OVTSpI3dAPmM63C7Kvw5yZ XJDO2t2AzX7g== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Jun 2020 17:00:14 -0700 IronPort-SDR: FqBmyVirxjX5CvGyX4U4+8Ob4V5X88tWb0dYbGsPBB6admSVZXGBOs54kNyOPRw/8yyY/7FL1O VxMSIlHlYMzg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,524,1583222400"; d="scan'208";a="352246026" Received: from labuser-z97x-ud5h.jf.intel.com ([10.165.21.211]) by orsmga001.jf.intel.com with ESMTP; 17 Jun 2020 17:00:14 -0700 From: Manasi Navare To: intel-gfx@lists.freedesktop.org Date: Wed, 17 Jun 2020 17:01:24 -0700 Message-Id: <20200618000124.29036-2-manasi.d.navare@intel.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20200618000124.29036-1-manasi.d.navare@intel.com> References: <20200618000124.29036-1-manasi.d.navare@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v2 2/2] drm/i915/dp: Wait or poll with timeout for DDI BUF non idle after enable X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 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" Based on the platform, Bspec expects us to wait or poll with timeout for DDI BUF IDLE bit to be set to 0 (non idle) afetr enabling DDI_BUF_CTL. Use the existing wait_for_buf_idle() to do this. v2: * Based on platform, fixed delay or poll (Ville) * Use a helper to do this (Imre, Ville) Cc: Ville Syrjälä Cc: Imre Deak Signed-off-by: Manasi Navare --- drivers/gpu/drm/i915/display/intel_ddi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index e4738c3b6d44..788c2be8fa73 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -4031,7 +4031,7 @@ static void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp) intel_de_write(dev_priv, DDI_BUF_CTL(port), intel_dp->DP); intel_de_posting_read(dev_priv, DDI_BUF_CTL(port)); - udelay(600); + intel_wait_ddi_buf_idle(dev_priv, port, false); } static void intel_ddi_set_link_train(struct intel_dp *intel_dp,