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_offset { 37 int x, y; 38 }; 39 40 struct drm_fb_helper_crtc { 41 struct drm_mode_set mode_set; 42 struct drm_display_mode *desired_mode; 43 int x, y; 44 }; 45 46 /** 47 * struct drm_fb_helper_surface_size - describes fbdev size and scanout surface size 48 * @fb_width: fbdev width 49 * @fb_height: fbdev height 50 * @surface_width: scanout buffer width 51 * @surface_height: scanout buffer height 52 * @surface_bpp: scanout buffer bpp 53 * @surface_depth: scanout buffer depth 54 * 55 * Note that the scanout surface width/height may be larger than the fbdev 56 * width/height. In case of multiple displays, the scanout surface is sized 57 * according to the largest width/height (so it is large enough for all CRTCs 58 * to scanout). But the fbdev width/height is sized to the minimum width/ 59 * height of all the displays. This ensures that fbcon fits on the smallest 60 * of the attached displays. 61 * 62 * So what is passed to drm_fb_helper_fill_var() should be fb_width/fb_height, 63 * rather than the surface size. 64 */ 65 struct drm_fb_helper_surface_size { 66 u32 fb_width; 67 u32 fb_height; 68 u32 surface_width; 69 u32 surface_height; 70 u32 surface_bpp; 71 u32 surface_depth; 72 }; 73 74 /** 75 * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library 76 * @gamma_set: Set the given gamma lut register on the given crtc. 77 * @gamma_get: Read the given gamma lut register on the given crtc, used to 78 * save the current lut when force-restoring the fbdev for e.g. 79 * kdbg. 80 * @fb_probe: Driver callback to allocate and initialize the fbdev info 81 * structure. Furthermore it also needs to allocate the drm 82 * framebuffer used to back the fbdev. 83 * @initial_config: Setup an initial fbdev display configuration 84 * 85 * Driver callbacks used by the fbdev emulation helper library. 86 */ 87 struct drm_fb_helper_funcs { 88 void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green, 89 u16 blue, int regno); 90 void (*gamma_get)(struct drm_crtc *crtc, u16 *red, u16 *green, 91 u16 *blue, int regno); 92 93 int (*fb_probe)(struct drm_fb_helper *helper, 94 struct drm_fb_helper_surface_size *sizes); 95 bool (*initial_config)(struct drm_fb_helper *fb_helper, 96 struct drm_fb_helper_crtc **crtcs, 97 struct drm_display_mode **modes, 98 struct drm_fb_offset *offsets, 99 bool *enabled, int width, int height); 100 }; 101 102 struct drm_fb_helper_connector { 103 struct drm_connector *connector; 104 }; 105 106 struct drm_fb_helper { 107 struct drm_framebuffer *fb; 108 struct drm_device *dev; 109 int crtc_count; 110 struct drm_fb_helper_crtc *crtc_info; 111 int connector_count; 112 int connector_info_alloc_count; 113 struct drm_fb_helper_connector **connector_info; 114 const struct drm_fb_helper_funcs *funcs; 115 struct fb_info *fbdev; 116 u32 pseudo_palette[17]; 117 struct list_head kernel_fb_list; 118 119 /* we got a hotplug but fbdev wasn't running the console 120 delay until next set_par */ 121 bool delayed_hotplug; 122 123 #ifdef __DragonFly__ 124 struct task fb_mode_task; 125 #endif 126 }; 127 128 void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, 129 const struct drm_fb_helper_funcs *funcs); 130 int drm_fb_helper_init(struct drm_device *dev, 131 struct drm_fb_helper *helper, int crtc_count, 132 int max_conn); 133 void drm_fb_helper_fini(struct drm_fb_helper *helper); 134 int drm_fb_helper_blank(int blank, struct fb_info *info); 135 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, 136 struct fb_info *info); 137 int drm_fb_helper_set_par(struct fb_info *info); 138 int drm_fb_helper_check_var(struct fb_var_screeninfo *var, 139 struct fb_info *info); 140 141 bool drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper); 142 143 struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper); 144 void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper); 145 void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper); 146 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, 147 uint32_t fb_width, uint32_t fb_height); 148 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, 149 uint32_t depth); 150 151 void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper); 152 153 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info); 154 155 int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper); 156 int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel); 157 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper); 158 int drm_fb_helper_debug_enter(struct fb_info *info); 159 int drm_fb_helper_debug_leave(struct fb_info *info); 160 struct drm_display_mode * 161 drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, 162 int width, int height); 163 struct drm_display_mode * 164 drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, 165 int width, int height); 166 167 int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector); 168 int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, 169 struct drm_connector *connector); 170 #endif 171