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