linux/include/drm/drm_fb_helper.h
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   1/*
   2 * Copyright (c) 2006-2009 Red Hat Inc.
   3 * Copyright (c) 2006-2008 Intel Corporation
   4 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
   5 *
   6 * DRM framebuffer helper functions
   7 *
   8 * Permission to use, copy, modify, distribute, and sell this software and its
   9 * documentation for any purpose is hereby granted without fee, provided that
  10 * the above copyright notice appear in all copies and that both that copyright
  11 * notice and this permission notice appear in supporting documentation, and
  12 * that the name of the copyright holders not be used in advertising or
  13 * publicity pertaining to distribution of the software without specific,
  14 * written prior permission.  The copyright holders make no representations
  15 * about the suitability of this software for any purpose.  It is provided "as
  16 * is" without express or implied warranty.
  17 *
  18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  24 * OF THIS SOFTWARE.
  25 *
  26 * Authors:
  27 *      Dave Airlie <airlied@linux.ie>
  28 *      Jesse Barnes <jesse.barnes@intel.com>
  29 */
  30#ifndef DRM_FB_HELPER_H
  31#define DRM_FB_HELPER_H
  32
  33struct drm_fb_helper;
  34
  35#include <linux/kgdb.h>
  36
  37struct drm_fb_helper_crtc {
  38        struct drm_mode_set mode_set;
  39        struct drm_display_mode *desired_mode;
  40};
  41
  42struct drm_fb_helper_surface_size {
  43        u32 fb_width;
  44        u32 fb_height;
  45        u32 surface_width;
  46        u32 surface_height;
  47        u32 surface_bpp;
  48        u32 surface_depth;
  49};
  50
  51struct drm_fb_helper_funcs {
  52        void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green,
  53                          u16 blue, int regno);
  54        void (*gamma_get)(struct drm_crtc *crtc, u16 *red, u16 *green,
  55                          u16 *blue, int regno);
  56
  57        int (*fb_probe)(struct drm_fb_helper *helper,
  58                        struct drm_fb_helper_surface_size *sizes);
  59};
  60
  61struct drm_fb_helper_connector {
  62        struct drm_connector *connector;
  63        struct drm_cmdline_mode cmdline_mode;
  64};
  65
  66struct drm_fb_helper {
  67        struct drm_framebuffer *fb;
  68        struct drm_framebuffer *saved_fb;
  69        struct drm_device *dev;
  70        struct drm_display_mode *mode;
  71        int crtc_count;
  72        struct drm_fb_helper_crtc *crtc_info;
  73        int connector_count;
  74        struct drm_fb_helper_connector **connector_info;
  75        struct drm_fb_helper_funcs *funcs;
  76        struct fb_info *fbdev;
  77        u32 pseudo_palette[17];
  78        struct list_head kernel_fb_list;
  79
  80        /* we got a hotplug but fbdev wasn't running the console
  81           delay until next set_par */
  82        bool delayed_hotplug;
  83};
  84
  85int drm_fb_helper_single_fb_probe(struct drm_fb_helper *helper,
  86                                  int preferred_bpp);
  87
  88int drm_fb_helper_init(struct drm_device *dev,
  89                       struct drm_fb_helper *helper, int crtc_count,
  90                       int max_conn);
  91void drm_fb_helper_fini(struct drm_fb_helper *helper);
  92int drm_fb_helper_blank(int blank, struct fb_info *info);
  93int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
  94                              struct fb_info *info);
  95int drm_fb_helper_set_par(struct fb_info *info);
  96int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
  97                            struct fb_info *info);
  98int drm_fb_helper_setcolreg(unsigned regno,
  99                            unsigned red,
 100                            unsigned green,
 101                            unsigned blue,
 102                            unsigned transp,
 103                            struct fb_info *info);
 104
 105bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper);
 106void drm_fb_helper_restore(void);
 107void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
 108                            uint32_t fb_width, uint32_t fb_height);
 109void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
 110                            uint32_t depth);
 111
 112int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
 113
 114int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
 115bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel);
 116int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper);
 117int drm_fb_helper_debug_enter(struct fb_info *info);
 118int drm_fb_helper_debug_leave(struct fb_info *info);
 119
 120#endif
 121
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