From patchwork Fri Apr 1 16:20:46 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Paauwe, Bob J" X-Patchwork-Id: 8726531 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 1DF109F39A for ; Fri, 1 Apr 2016 16:20:28 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5EE92203A4 for ; Fri, 1 Apr 2016 16:20:27 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 8F2C0203AB for ; Fri, 1 Apr 2016 16:20:26 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F1AAA6E2F8; Fri, 1 Apr 2016 16:20:24 +0000 (UTC) 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 E1D146E2FA for ; Fri, 1 Apr 2016 16:20:21 +0000 (UTC) Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga102.jf.intel.com with ESMTP; 01 Apr 2016 09:20:22 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,427,1455004800"; d="scan'208";a="77385457" Received: from bpaauwe-desk.fm.intel.com ([10.1.134.218]) by fmsmga004.fm.intel.com with ESMTP; 01 Apr 2016 09:20:16 -0700 From: Bob Paauwe To: intel-gfx Date: Fri, 1 Apr 2016 09:20:46 -0700 Message-Id: <1459527646-9083-1-git-send-email-bob.j.paauwe@intel.com> X-Mailer: git-send-email 2.4.3 Subject: [Intel-gfx] [PATCH] drm/i915: Read DPCD when connector forced on. 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=-5.2 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 When a DP connector is forced on using using the video=:e kernel command line, we bypass the calls to check if the port is connected and also bypass the call to intel_dp_detect_dpcd(); The result is that we don't query for the sink capabilities like the max link bandwidth. The sink capabilities are needed to set a mode. The solution is to add a call to intel_dp_detect_dpcd() in the code path for forced on DP connectors. Signed-off-by: Bob Paauwe --- drivers/gpu/drm/i915/intel_dp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 8aa9214..39b7f6d 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -4644,6 +4644,8 @@ intel_dp_force(struct drm_connector *connector) power_domain = intel_display_port_aux_power_domain(intel_encoder); intel_display_power_get(dev_priv, power_domain); + intel_dp_detect_dpcd(intel_dp); + intel_dp_set_edid(intel_dp); intel_display_power_put(dev_priv, power_domain);