1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>drm_fb_helper_hotplug_event</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#idp1125647748" title="fbdev Helper Functions Reference"><link rel="prev" href="API-drm-fb-helper-initial-config.html" title="drm_fb_helper_initial_config"><link rel="next" href="API-struct-drm-fb-helper-surface-size.html" title="struct drm_fb_helper_surface_size"></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_fb_helper_hotplug_event</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-drm-fb-helper-initial-config.html">Prev</a>&#160;</td><th width="60%" align="center">fbdev Helper Functions Reference</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-struct-drm-fb-helper-surface-size.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-drm-fb-helper-hotplug-event"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>drm_fb_helper_hotplug_event &#8212; 
2     respond to a hotplug notification by probing all the outputs attached to the fb
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">int <b class="fsfunc">drm_fb_helper_hotplug_event </b>(</code></td><td>struct drm_fb_helper * <var class="pdparam">fb_helper</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1125784756"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>fb_helper</code></em></span></dt><dd><p>
4     the drm_fb_helper
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1125786372"></a><h2>Description</h2><p>
6   Scan the connectors attached to the fb_helper and try to put together a
7   setup after *notification of a change in output configuration.
8   </p><p>
9
10   Called at runtime, takes the mode config locks to be able to check/change the
11   modeset configuration. Must be run from process context (which usually means
12   either the output polling work or a work item launched from the driver's
13   hotplug interrupt).
14   </p><p>
15
16   Note that drivers may call this even before calling
17   drm_fb_helper_initial_config but only aftert drm_fb_helper_init. This allows
18   for a race-free fbcon setup and will make sure that the fbdev emulation will
19   not miss any hotplug events.
20</p></div><div class="refsect1"><a name="idp1125787900"></a><h2>RETURNS</h2><p>
21   0 on success and a non-zero error code otherwise.
22</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-drm-fb-helper-initial-config.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch02s05.html#idp1125647748">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-struct-drm-fb-helper-surface-size.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">drm_fb_helper_initial_config</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">struct drm_fb_helper_surface_size</span></td></tr></table></div></body></html>
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