From patchwork Mon Aug 8 13:00:30 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kahola, Mika" X-Patchwork-Id: 9270041 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 256C36075A for ; Tue, 9 Aug 2016 01:02:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 179A5280DE for ; Tue, 9 Aug 2016 01:02:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0CA61281F9; Tue, 9 Aug 2016 01:02:17 +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]) (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 8FA33280DE for ; Tue, 9 Aug 2016 01:02:16 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1BF436E550; Tue, 9 Aug 2016 01:02:04 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id 671D96E2C7; Mon, 8 Aug 2016 13:01:36 +0000 (UTC) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 08 Aug 2016 06:01:21 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos; i="5.28,490,1464678000"; d="scan'208"; a="1010443286" Received: from sorvi.fi.intel.com ([10.237.72.167]) by orsmga001.jf.intel.com with ESMTP; 08 Aug 2016 06:00:42 -0700 From: Mika Kahola To: dri-devel@lists.freedesktop.org Subject: [PATCH v7 5/5] drm: Add DP branch device info on debugfs Date: Mon, 8 Aug 2016 16:00:30 +0300 Message-Id: <1470661230-15988-6-git-send-email-mika.kahola@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1470661230-15988-1-git-send-email-mika.kahola@intel.com> References: <1470661230-15988-1-git-send-email-mika.kahola@intel.com> X-Mailman-Approved-At: Tue, 09 Aug 2016 01:02:00 +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 Read DisplayPort branch device info from through debugfs interface. v2: use drm_dp_helper routines to collect data v3: cleanup to match the drm_dp_helper.c patches introduced earlier in this series v4: move DP branch device info to function 'intel_dp_branch_device_info()' v5: initial step to move debugging info from intel_dp. to drm_dp_helper.c (Daniel) Signed-off-by: Mika Kahola --- drivers/gpu/drm/drm_dp_helper.c | 80 +++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_debugfs.c | 2 + include/drm/drm_dp_helper.h | 2 + 3 files changed, 84 insertions(+) diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index a2c46ed..47bbb5e 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -603,6 +603,86 @@ int drm_dp_downstream_id(struct drm_dp_aux *aux, char id[6]) } EXPORT_SYMBOL(drm_dp_downstream_id); +/** + * drm_dp_downstream_debug() - debug DP branch devices + * @m: pointer for debugfs file + * @dpcd: DisplayPort configuration data + * @port_cap: port capabilities + * @aux: DisplayPort AUX channel + * + */ +void drm_dp_downstream_debug(struct seq_file *m, const u8 dpcd[DP_RECEIVER_CAP_SIZE], + const u8 port_cap[4], struct drm_dp_aux *aux) +{ + struct drm_dp_link link; + bool detailed_cap_info = dpcd[DP_DOWNSTREAMPORT_PRESENT] & + DP_DETAILED_CAP_INFO_AVAILABLE; + int clk; + int bpc; + char id[6]; + int type = port_cap[0] & DP_DS_PORT_TYPE_MASK; + bool branch_device = dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT; + + seq_printf(m, "\tDP branch device present: %s\n", branch_device ? "yes" : "no"); + + if (!branch_device) + return; + + switch (type) { + case DP_DS_PORT_TYPE_DP: + seq_printf(m, "\t\tType: DisplayPort\n"); + break; + case DP_DS_PORT_TYPE_VGA: + seq_printf(m, "\t\tType: VGA\n"); + break; + case DP_DS_PORT_TYPE_DVI: + seq_printf(m, "\t\tType: DVI\n"); + break; + case DP_DS_PORT_TYPE_HDMI: + seq_printf(m, "\t\tType: HDMI\n"); + break; + case DP_DS_PORT_TYPE_NON_EDID: + seq_printf(m, "\t\tType: others without EDID support\n"); + break; + case DP_DS_PORT_TYPE_DP_DUALMODE: + seq_printf(m, "\t\tType: DP++\n"); + break; + case DP_DS_PORT_TYPE_WIRELESS: + seq_printf(m, "\t\tType: Wireless\n"); + break; + default: + seq_printf(m, "\t\tType: N/A\n"); + } + + drm_dp_downstream_id(aux, id); + seq_printf(m, "\t\tID: %s\n", id); + + if (drm_dp_downstream_hw_rev(dpcd, aux, &link) == 0) + seq_printf(m, "\t\tHW revision: %.2d.%.2d\n", link.ds_hw_rev.major, + link.ds_hw_rev.minor); + + if (drm_dp_downstream_sw_rev(dpcd, aux, &link) == 0) + seq_printf(m, "\t\tSW revision: %.2d.%.2d\n", link.ds_sw_rev.major, + link.ds_sw_rev.minor); + + if (detailed_cap_info) { + clk = drm_dp_downstream_max_clock(dpcd, port_cap); + + if (clk > 0) { + if (type == DP_DS_PORT_TYPE_VGA) + seq_printf(m, "\t\tMax dot clock: %d kHz\n", clk); + else + seq_printf(m, "\t\tMax TMDS clock: %d kHz\n", clk); + } + + bpc = drm_dp_downstream_max_bpc(dpcd, port_cap); + + if (bpc > 0) + seq_printf(m, "\t\tMax bpc: %d\n", bpc); + } +} +EXPORT_SYMBOL(drm_dp_downstream_debug); + /* * I2C-over-AUX implementation */ diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 531ca02..3747f67 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2959,6 +2959,8 @@ static void intel_dp_info(struct seq_file *m, seq_printf(m, "\taudio support: %s\n", yesno(intel_dp->has_audio)); if (intel_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) intel_panel_info(m, &intel_connector->panel); + drm_dp_downstream_debug(m, intel_dp->dpcd, intel_dp->downstream_ports, + &intel_dp->aux); } static void intel_hdmi_info(struct seq_file *m, diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 5491a9b..85123ac 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -837,6 +837,8 @@ int drm_dp_downstream_hw_rev(const u8 dpcd[DP_RECEIVER_CAP_SIZE], int drm_dp_downstream_sw_rev(const u8 dpcd[DP_RECEIVER_CAP_SIZE], struct drm_dp_aux *aux, struct drm_dp_link *link); +void drm_dp_downstream_debug(struct seq_file *m, const u8 dpcd[DP_RECEIVER_CAP_SIZE], + const u8 port_cap[4], struct drm_dp_aux *aux); void drm_dp_aux_init(struct drm_dp_aux *aux); int drm_dp_aux_register(struct drm_dp_aux *aux);