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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.  
  36. struct drm_fb_helper_crtc {
  37.         struct drm_mode_set mode_set;
  38.         struct drm_display_mode *desired_mode;
  39. };
  40.  
  41. struct drm_fb_helper_surface_size {
  42.         u32 fb_width;
  43.         u32 fb_height;
  44.         u32 surface_width;
  45.         u32 surface_height;
  46.         u32 surface_bpp;
  47.         u32 surface_depth;
  48. };
  49.  
  50. /**
  51.  * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library
  52.  * @gamma_set: - Set the given gamma lut register on the given crtc.
  53.  * @gamma_get: - Read the given gamma lut register on the given crtc, used to
  54.  *               save the current lut when force-restoring the fbdev for e.g.
  55.  *               kdbg.
  56.  * @fb_probe: - Driver callback to allocate and initialize the fbdev info
  57.  *              structure. Futhermore it also needs to allocate the drm
  58.  *              framebuffer used to back the fbdev.
  59.  *
  60.  * Driver callbacks used by the fbdev emulation helper library.
  61.  */
  62. struct drm_fb_helper_funcs {
  63.         void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green,
  64.                           u16 blue, int regno);
  65.         void (*gamma_get)(struct drm_crtc *crtc, u16 *red, u16 *green,
  66.                           u16 *blue, int regno);
  67.  
  68.         int (*fb_probe)(struct drm_fb_helper *helper,
  69.                         struct drm_fb_helper_surface_size *sizes);
  70. };
  71.  
  72. struct drm_fb_helper_connector {
  73.         struct drm_connector *connector;
  74.         struct drm_cmdline_mode cmdline_mode;
  75. };
  76.  
  77. struct drm_fb_helper {
  78.         struct drm_framebuffer *fb;
  79.         struct drm_device *dev;
  80.         int crtc_count;
  81.         struct drm_fb_helper_crtc *crtc_info;
  82.         int connector_count;
  83.         struct drm_fb_helper_connector **connector_info;
  84.         struct drm_fb_helper_funcs *funcs;
  85.         struct fb_info *fbdev;
  86.         u32 pseudo_palette[17];
  87.         struct list_head kernel_fb_list;
  88.  
  89.         /* we got a hotplug but fbdev wasn't running the console
  90.            delay until next set_par */
  91.         bool delayed_hotplug;
  92. };
  93.  
  94. int drm_fb_helper_init(struct drm_device *dev,
  95.                        struct drm_fb_helper *helper, int crtc_count,
  96.                                   int max_conn);
  97. void drm_fb_helper_fini(struct drm_fb_helper *helper);
  98. int drm_fb_helper_blank(int blank, struct fb_info *info);
  99. int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
  100.                               struct fb_info *info);
  101. int drm_fb_helper_set_par(struct fb_info *info);
  102. int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
  103.                             struct fb_info *info);
  104. int drm_fb_helper_setcolreg(unsigned regno,
  105.                             unsigned red,
  106.                             unsigned green,
  107.                             unsigned blue,
  108.                             unsigned transp,
  109.                             struct fb_info *info);
  110.  
  111. bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper);
  112. void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
  113.                             uint32_t fb_width, uint32_t fb_height);
  114. void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
  115.                             uint32_t depth);
  116.  
  117. int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
  118.  
  119. int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
  120. bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel);
  121. int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper);
  122. int drm_fb_helper_debug_enter(struct fb_info *info);
  123. int drm_fb_helper_debug_leave(struct fb_info *info);
  124.  
  125. #endif
  126.