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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.  
  33. struct drm_fb_helper;
  34.  
  35. #include <linux/kgdb.h>
  36.  
  37. struct drm_fb_helper_crtc {
  38.         struct drm_mode_set mode_set;
  39.         struct drm_display_mode *desired_mode;
  40. };
  41.  
  42. struct 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.  
  51. /**
  52.  * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library
  53.  * @gamma_set: Set the given gamma lut register on the given crtc.
  54.  * @gamma_get: Read the given gamma lut register on the given crtc, used to
  55.  *               save the current lut when force-restoring the fbdev for e.g.
  56.  *               kdbg.
  57.  * @fb_probe: Driver callback to allocate and initialize the fbdev info
  58.  *            structure. Furthermore it also needs to allocate the drm
  59.  *              framebuffer used to back the fbdev.
  60.  * @initial_config: Setup an initial fbdev display configuration
  61.  *
  62.  * Driver callbacks used by the fbdev emulation helper library.
  63.  */
  64. struct drm_fb_helper_funcs {
  65.         void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green,
  66.                           u16 blue, int regno);
  67.         void (*gamma_get)(struct drm_crtc *crtc, u16 *red, u16 *green,
  68.                           u16 *blue, int regno);
  69.  
  70.         int (*fb_probe)(struct drm_fb_helper *helper,
  71.                         struct drm_fb_helper_surface_size *sizes);
  72.         bool (*initial_config)(struct drm_fb_helper *fb_helper,
  73.                                struct drm_fb_helper_crtc **crtcs,
  74.                                struct drm_display_mode **modes,
  75.                                bool *enabled, int width, int height);
  76. };
  77.  
  78. struct drm_fb_helper_connector {
  79.         struct drm_connector *connector;
  80.         struct drm_cmdline_mode cmdline_mode;
  81. };
  82.  
  83. struct drm_fb_helper {
  84.         struct drm_framebuffer *fb;
  85.         struct drm_device *dev;
  86.         int crtc_count;
  87.         struct drm_fb_helper_crtc *crtc_info;
  88.         int connector_count;
  89.         int connector_info_alloc_count;
  90.         struct drm_fb_helper_connector **connector_info;
  91.         const struct drm_fb_helper_funcs *funcs;
  92.         struct fb_info *fbdev;
  93.         u32 pseudo_palette[17];
  94.         struct list_head kernel_fb_list;
  95.  
  96.         /* we got a hotplug but fbdev wasn't running the console
  97.            delay until next set_par */
  98.         bool delayed_hotplug;
  99. };
  100.  
  101. void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper,
  102.                            const struct drm_fb_helper_funcs *funcs);
  103. int drm_fb_helper_init(struct drm_device *dev,
  104.                        struct drm_fb_helper *helper, int crtc_count,
  105.                                   int max_conn);
  106. void drm_fb_helper_fini(struct drm_fb_helper *helper);
  107. int drm_fb_helper_blank(int blank, struct fb_info *info);
  108. int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
  109.                               struct fb_info *info);
  110. int drm_fb_helper_set_par(struct fb_info *info);
  111. int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
  112.                             struct fb_info *info);
  113.  
  114. bool drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper);
  115. void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
  116.                             uint32_t fb_width, uint32_t fb_height);
  117. void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
  118.                             uint32_t depth);
  119.  
  120. int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
  121.  
  122. int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
  123. bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel);
  124. int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper);
  125. int drm_fb_helper_debug_enter(struct fb_info *info);
  126. int drm_fb_helper_debug_leave(struct fb_info *info);
  127. struct drm_display_mode *
  128. drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector,
  129.                         int width, int height);
  130. struct drm_display_mode *
  131. drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
  132.                       int width, int height);
  133.  
  134. int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector);
  135. int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
  136.                                        struct drm_connector *connector);
  137. #endif
  138.