From patchwork Tue Jul 7 10:40:49 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sivakumar Thulasimani X-Patchwork-Id: 6731911 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 D22909F319 for ; Tue, 7 Jul 2015 10:36:26 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 13A0C206FD for ; Tue, 7 Jul 2015 10:36:26 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id D1AB3206FC for ; Tue, 7 Jul 2015 10:36:24 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BD6086E9B8; Tue, 7 Jul 2015 03:36:23 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTP id 5160B6E9B8 for ; Tue, 7 Jul 2015 03:36:22 -0700 (PDT) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga102.jf.intel.com with ESMTP; 07 Jul 2015 03:36:23 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,422,1432623600"; d="scan'208";a="601507785" Received: from rtshiva-desktop.iind.intel.com ([10.223.26.71]) by orsmga003.jf.intel.com with ESMTP; 07 Jul 2015 03:36:20 -0700 From: Sivakumar Thulasimani To: jani.nikula@intel.com, intel-gfx@lists.freedesktop.org Date: Tue, 7 Jul 2015 16:10:49 +0530 Message-Id: <1436265650-5201-1-git-send-email-sivakumar.thulasimani@intel.com> X-Mailer: git-send-email 1.7.9.5 Subject: [Intel-gfx] [PATCH] drm/i915: storm detection documentation update 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=-5.0 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 From: "Thulasimani,Sivakumar" Update the hotplug documentation to explain that hotplug storm is not expected for Display port panels and hence is not handled in current code. Signed-off-by: Sivakumar Thulasimani Tested-By: Intel Graphics QA PRTS (Patch Regression Test System Contact: shuang.he@intel.com) --- drivers/gpu/drm/i915/intel_hotplug.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_hotplug.c b/drivers/gpu/drm/i915/intel_hotplug.c index bac91a1..7dc5e6a 100644 --- a/drivers/gpu/drm/i915/intel_hotplug.c +++ b/drivers/gpu/drm/i915/intel_hotplug.c @@ -66,6 +66,10 @@ * while before being re-enabled. The intention is to mitigate issues raising * from broken hardware triggering massive amounts of interrupts and grinding * the system to a halt. + * + * Hotplug interrupt storm is not expected on Display port panel, hence the + * current code only handles disabling and later enabling of HPD interrupts + * for HDMI panels through the storm handling set of functions. */ enum port intel_hpd_pin_to_port(enum hpd_pin pin)