1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>intel_display_power_get</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="drmI915.html#idp1127683628" title="Runtime Power Management"><link rel="prev" href="API-intel-display-set-init-power.html" title="intel_display_set_init_power"><link rel="next" href="API-intel-display-power-put.html" title="intel_display_power_put"></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">intel_display_power_get</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-intel-display-set-init-power.html">Prev</a>&#160;</td><th width="60%" align="center">Runtime Power Management</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-intel-display-power-put.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-intel-display-power-get"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>intel_display_power_get &#8212; 
2     grab a power domain reference
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">void <b class="fsfunc">intel_display_power_get </b>(</code></td><td>struct drm_i915_private * <var class="pdparam">dev_priv</var>, </td></tr><tr><td>&#160;</td><td>enum intel_display_power_domain <var class="pdparam">domain</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1127718948"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>dev_priv</code></em></span></dt><dd><p>
4     i915 device instance
5    </p></dd><dt><span class="term"><em class="parameter"><code>domain</code></em></span></dt><dd><p>
6     power domain to reference
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1127721596"></a><h2>Description</h2><p>
8   This function grabs a power domain reference for <em class="parameter"><code>domain</code></em> and ensures that the
9   power domain and all its parents are powered up. Therefore users should only
10   grab a reference to the innermost power domain they need.
11   </p><p>
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13   Any power domain reference obtained by this function must have a symmetric
14   call to <code class="function">intel_display_power_put</code> to release the reference again.
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