1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>struct drm_fb_helper_funcs</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-struct-drm-fb-helper-surface-size.html" title="struct drm_fb_helper_surface_size"><link rel="next" href="API-struct-drm-dp-aux-msg.html" title="struct drm_dp_aux_msg"></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">struct drm_fb_helper_funcs</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-struct-drm-fb-helper-surface-size.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-dp-aux-msg.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-struct-drm-fb-helper-funcs"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>struct drm_fb_helper_funcs &#8212; 
2     driver callbacks for the fbdev emulation library
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="programlisting">
4struct drm_fb_helper_funcs {
5  void (* gamma_set) (struct drm_crtc *crtc, u16 red, u16 green,u16 blue, int regno);
6  void (* gamma_get) (struct drm_crtc *crtc, u16 *red, u16 *green,u16 *blue, int regno);
7  int (* fb_probe) (struct drm_fb_helper *helper,struct drm_fb_helper_surface_size *sizes);
8  bool (* initial_config) (struct drm_fb_helper *fb_helper,struct drm_fb_helper_crtc **crtcs,struct drm_display_mode **modes,struct drm_fb_offset *offsets,bool *enabled, int width, int height);
9};  </pre></div><div class="refsect1"><a name="idp1125803636"></a><h2>Members</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term">gamma_set</span></dt><dd><p>
10   Set the given gamma lut register on the given crtc.
11      </p></dd><dt><span class="term">gamma_get</span></dt><dd><p>
12   Read the given gamma lut register on the given crtc, used to
13   save the current lut when force-restoring the fbdev for e.g.
14   kdbg.
15      </p></dd><dt><span class="term">fb_probe</span></dt><dd><p>
16   Driver callback to allocate and initialize the fbdev info
17   structure. Furthermore it also needs to allocate the drm
18   framebuffer used to back the fbdev.
19      </p></dd><dt><span class="term">initial_config</span></dt><dd><p>
20   Setup an initial fbdev display configuration
21      </p></dd></dl></div></div><div class="refsect1"><a name="idp1125807324"></a><h2>Description</h2><p>
22   Driver callbacks used by the fbdev emulation helper library.
23</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-struct-drm-fb-helper-surface-size.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-dp-aux-msg.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">struct drm_fb_helper_surface_size</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_dp_aux_msg</span></td></tr></table></div></body></html>
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