1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>drm_dp_mst_detect_port</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux DRM Developer's Guide"><link rel="up" href="ch02s05.html#idp1125934820" title="Display Port MST Helper Functions Reference"><link rel="prev" href="API-drm-dp-mst-hpd-irq.html" title="drm_dp_mst_hpd_irq"><link rel="next" href="API-drm-dp-mst-get-edid.html" title="drm_dp_mst_get_edid"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">drm_dp_mst_detect_port</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-drm-dp-mst-hpd-irq.html">Prev</a>&#160;</td><th width="60%" align="center">Display Port MST Helper Functions Reference</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-drm-dp-mst-get-edid.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-drm-dp-mst-detect-port"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>drm_dp_mst_detect_port &#8212; 
2     get connection status for an MST port
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">enum drm_connector_status <b class="fsfunc">drm_dp_mst_detect_port </b>(</code></td><td>struct drm_connector * <var class="pdparam">connector</var>, </td></tr><tr><td>&#160;</td><td>struct drm_dp_mst_topology_mgr * <var class="pdparam">mgr</var>, </td></tr><tr><td>&#160;</td><td>struct drm_dp_mst_port * <var class="pdparam">port</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1126044804"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>connector</code></em></span></dt><dd><p>
4     -- undescribed --
5    </p></dd><dt><span class="term"><em class="parameter"><code>mgr</code></em></span></dt><dd><p>
6     manager for this port
7    </p></dd><dt><span class="term"><em class="parameter"><code>port</code></em></span></dt><dd><p>
8     unverified pointer to a port
9    </p></dd></dl></div></div><div class="refsect1"><a name="idp1126048460"></a><h2>Description</h2><p>
10   This returns the current connection state for a port. It validates the
11   port pointer still exists so the caller doesn't require a reference
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