1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>drm_crtc_vblank_on</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="drm-vertical-blank.html#idp1127382092" title="Vertical Blanking and Interrupt Handling Functions Reference"><link rel="prev" href="API-drm-vblank-on.html" title="drm_vblank_on"><link rel="next" href="API-drm-vblank-pre-modeset.html" title="drm_vblank_pre_modeset"></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_crtc_vblank_on</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-drm-vblank-on.html">Prev</a>&#160;</td><th width="60%" align="center">Vertical Blanking and Interrupt Handling Functions Reference</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-drm-vblank-pre-modeset.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-drm-crtc-vblank-on"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>drm_crtc_vblank_on &#8212; 
2     enable vblank events on a CRTC
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">drm_crtc_vblank_on </b>(</code></td><td>struct drm_crtc * <var class="pdparam">crtc</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1127590796"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>crtc</code></em></span></dt><dd><p>
4     CRTC in question
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1127592404"></a><h2>Description</h2><p>
6   This functions restores the vblank interrupt state captured with
7   <code class="function">drm_vblank_off</code> again. Note that calls to <code class="function">drm_vblank_on</code> and
8   <code class="function">drm_vblank_off</code> can be unbalanced and so can also be unconditionally called
9   in driver load code to reflect the current hardware state of the crtc.
10   </p><p>
11
12   This is the native kms version of <code class="function">drm_vblank_on</code>.
13</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-vblank-on.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="drm-vertical-blank.html#idp1127382092">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-drm-vblank-pre-modeset.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">drm_vblank_on</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">drm_vblank_pre_modeset</span></td></tr></table></div></body></html>
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