From patchwork Wed Oct 24 02:19:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juston Li X-Patchwork-Id: 10654025 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 417B313B5 for ; Wed, 24 Oct 2018 02:22:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2A8B52A119 for ; Wed, 24 Oct 2018 02:22:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1E5212A5C8; Wed, 24 Oct 2018 02:22:27 +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 214382A119 for ; Wed, 24 Oct 2018 02:22:25 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 39D9A6E006; Wed, 24 Oct 2018 02:22:24 +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 2034C6E006; Wed, 24 Oct 2018 02:22:23 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 23 Oct 2018 19:22:22 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,418,1534834800"; d="scan'208";a="102098561" Received: from jhli-desk1.jf.intel.com ([10.7.198.167]) by orsmga001.jf.intel.com with ESMTP; 23 Oct 2018 19:22:22 -0700 From: Juston Li To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Tue, 23 Oct 2018 19:19:23 -0700 Message-Id: <20181024021925.27026-1-juston.li@intel.com> X-Mailer: git-send-email 2.17.2 Subject: [Intel-gfx] [RESEND PATCH v2 0/2] Check MST topology change on resume 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: , Cc: mario.limonciello@dell.com, linux-kernel@vger.kernel.org, nathan.d.ciobanu@intel.com, jared_dominguez@dell.com MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP Updated and resending these patches from Lyude: https://lkml.org/lkml/2016/5/19/361 https://lkml.org/lkml/2016/5/19/360 As Lyude explains in patch 1/2, we can't rely on MST hubs to handle hotplugs during suspend. This patchset will check if any EDID's changed upon resume and reset the MST connections if they did. This resolves issues with monitors not being detected when hotplugging them during suspend. Signed-off-by: Juston Li Changes since v1: - update functions that have been renamed since the original patch - add a null check for the cached EDID in case a new device was added - checkpatch fixes Lyude (2): drm/dp/mst: Reprobe EDID for MST ports on resume drm/i915/mst: Reset MST after resume when necessary drivers/gpu/drm/drm_dp_mst_topology.c | 94 ++++++++++++++++++++++++++- drivers/gpu/drm/i915/intel_dp.c | 7 +- 2 files changed, 99 insertions(+), 2 deletions(-)