From patchwork Mon Jun 6 13:29:05 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Kahola X-Patchwork-Id: 9159635 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E71F060572 for ; Tue, 7 Jun 2016 00:40:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D7FE628326 for ; Tue, 7 Jun 2016 00:40:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CBBC228350; Tue, 7 Jun 2016 00:40:54 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9B72828326 for ; Tue, 7 Jun 2016 00:40:54 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 724A16E672; Tue, 7 Jun 2016 00:40:41 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTP id 138A36E50A; Mon, 6 Jun 2016 13:29:22 +0000 (UTC) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga101.fm.intel.com with ESMTP; 06 Jun 2016 06:29:21 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,427,1459839600"; d="scan'208";a="969814832" Received: from sorvi.fi.intel.com ([10.237.72.50]) by orsmga001.jf.intel.com with ESMTP; 06 Jun 2016 06:29:21 -0700 From: Mika Kahola To: dri-devel@lists.freedesktop.org Subject: [PATCH v4 03/11] drm: Helper to read DP branch device type Date: Mon, 6 Jun 2016 16:29:05 +0300 Message-Id: <1465219753-3737-4-git-send-email-mika.kahola@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1465219753-3737-1-git-send-email-mika.kahola@intel.com> References: <1465219753-3737-1-git-send-email-mika.kahola@intel.com> X-Mailman-Approved-At: Tue, 07 Jun 2016 00:40:39 +0000 Cc: daniel.vetter@ffwll.ch, intel-gfx@lists.freedesktop.org, jim.bride@linux.intel.com X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Helper routine to read out DisplayPort branch device type. The spec defines these type as following 0 DisplayPort 1 Analog VGA 2 DVI 3 HDMI 4 Others without EDID support 5 DP++ 6 Wireless 7 Reserved Signed-off-by: Mika Kahola --- drivers/gpu/drm/drm_dp_helper.c | 14 ++++++++++++++ include/drm/drm_dp_helper.h | 1 + 2 files changed, 15 insertions(+) diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index c4149fd..7d3b245 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -465,6 +465,20 @@ int drm_dp_downstream_port_cap(struct drm_dp_aux *aux, } EXPORT_SYMBOL(drm_dp_downstream_port_cap); +/** + * drm_dp_downstream_type() - extract downstream port type + * @dpcd: DisplayPort configuration data + * @port_cap: port capabilities + * + * Returns type in success or negative error code on failure + */ +int drm_dp_downstream_type(const u8 dpcd[DP_RECEIVER_CAP_SIZE], + const u8 port_cap[4]) +{ + return port_cap[0] & DP_DS_PORT_TYPE_MASK; +} +EXPORT_SYMBOL(drm_dp_downstream_type); + /* * I2C-over-AUX implementation */ diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index db8d3d47..f290829 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -809,6 +809,7 @@ int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link); int drm_dp_downstream_port_cap(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE], u8 port_cap[4]); +int drm_dp_downstream_type(const u8 dpcd[DP_RECEIVER_CAP_SIZE], const u8 port_cap[4]); int drm_dp_aux_register(struct drm_dp_aux *aux); void drm_dp_aux_unregister(struct drm_dp_aux *aux);