From patchwork Thu Mar 17 07:59:25 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sharma, Shashank" X-Patchwork-Id: 8607611 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 7068B9F54C for ; Thu, 17 Mar 2016 07:50:08 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9364B20279 for ; Thu, 17 Mar 2016 07:50:07 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id A378B20173 for ; Thu, 17 Mar 2016 07:50:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E6C266EA6D; Thu, 17 Mar 2016 07:50:03 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTP id 6A0666EA6D for ; Thu, 17 Mar 2016 07:50:01 +0000 (UTC) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga103.jf.intel.com with ESMTP; 17 Mar 2016 00:50:01 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,349,1455004800"; d="scan'208";a="765894095" Received: from shashanks-desktop.iind.intel.com ([10.223.26.81]) by orsmga003.jf.intel.com with ESMTP; 17 Mar 2016 00:49:58 -0700 From: Shashank Sharma To: intel-gfx@lists.freedesktop.org Date: Thu, 17 Mar 2016 13:29:25 +0530 Message-Id: <1458201565-10128-1-git-send-email-shashank.sharma@intel.com> X-Mailer: git-send-email 1.9.1 Cc: daniel.vetter@intel.com Subject: [Intel-gfx] [PATCH] drm/i915: Restrict usage of live status check 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-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch restricts usage of live status check for HDMI detection. While testing certain (monitor + cable) combinations with various intel platforms, it seems that live status register is not reliable on some older devices. So limit the live_status check from VLV onwards. This fixes a regression introduced in: commit: 237ed86 "drm/i915: Check live status" Author: Sonika Jindal Date: Tue Sep 15 09:44:20 2015 +0530 Signed-off-by: Shashank Sharma --- drivers/gpu/drm/i915/intel_hdmi.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index e2dab48..d24d18a 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -1397,7 +1397,8 @@ intel_hdmi_detect(struct drm_connector *connector, bool force) enum drm_connector_status status; struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector); struct drm_i915_private *dev_priv = to_i915(connector->dev); - bool live_status = false; + struct drm_device *dev = connector->dev; + bool live_status = true; unsigned int try; DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", @@ -1405,16 +1406,21 @@ intel_hdmi_detect(struct drm_connector *connector, bool force) intel_display_power_get(dev_priv, POWER_DOMAIN_GMBUS); - for (try = 0; !live_status && try < 9; try++) { - if (try) - msleep(10); - live_status = intel_digital_port_connected(dev_priv, + /* + * Live status check for HDMI detection is not very + * reliable on older platforms. So insist the live + * status check for EDID read from VLV onwards. + */ + if (INTEL_INFO(dev)->gen >= 7 && !IS_IVYBRIDGE(dev)) { + for (try = 0; !live_status && try < 9; try++) { + if (try) + msleep(10); + live_status = intel_digital_port_connected(dev_priv, hdmi_to_dig_port(intel_hdmi)); + } + DRM_DEBUG_KMS("Live status %s\n", live_status ? "up" : "down"); } - if (!live_status) - DRM_DEBUG_KMS("Live status not up!"); - intel_hdmi_unset_edid(connector); if (intel_hdmi_set_edid(connector, live_status)) {