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 struct drm_fb_helper_crtc { 36 struct drm_mode_set mode_set; 37 struct drm_display_mode *desired_mode; 38 }; 39 40 struct drm_fb_helper_surface_size { 41 u32 fb_width; 42 u32 fb_height; 43 u32 surface_width; 44 u32 surface_height; 45 u32 surface_bpp; 46 u32 surface_depth; 47 }; 48 49 /** 50 * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library 51 * @gamma_set: Set the given gamma lut register on the given crtc. 52 * @gamma_get: Read the given gamma lut register on the given crtc, used to 53 * save the current lut when force-restoring the fbdev for e.g. 54 * kdbg. 55 * @fb_probe: Driver callback to allocate and initialize the fbdev info 56 * structure. Futhermore it also needs to allocate the drm 57 * framebuffer used to back the fbdev. 58 * @initial_config: Setup an initial fbdev display configuration 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 bool (*initial_config)(struct drm_fb_helper *fb_helper, 71 struct drm_fb_helper_crtc **crtcs, 72 struct drm_display_mode **modes, 73 bool *enabled, int width, int height); 74 }; 75 76 struct drm_fb_helper_connector { 77 struct drm_connector *connector; 78 struct drm_cmdline_mode cmdline_mode; 79 }; 80 81 struct drm_fb_helper { 82 struct drm_framebuffer *fb; 83 struct drm_device *dev; 84 int crtc_count; 85 struct drm_fb_helper_crtc *crtc_info; 86 int connector_count; 87 struct drm_fb_helper_connector **connector_info; 88 struct drm_fb_helper_funcs *funcs; 89 struct task fb_mode_task; 90 struct fb_info *fbdev; 91 u32 pseudo_palette[17]; 92 struct list_head kernel_fb_list; 93 94 /* we got a hotplug but fbdev wasn't running the console 95 delay until next set_par */ 96 bool delayed_hotplug; 97 }; 98 99 struct fb_var_screeninfo; 100 struct fb_cmap; 101 102 int drm_fb_helper_init(struct drm_device *dev, 103 struct drm_fb_helper *helper, int crtc_count, 104 int max_conn); 105 void drm_fb_helper_fini(struct drm_fb_helper *helper); 106 int drm_fb_helper_blank(int blank, struct fb_info *info); 107 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, 108 struct fb_info *info); 109 int drm_fb_helper_set_par(struct fb_info *info); 110 int drm_fb_helper_check_var(struct fb_var_screeninfo *var, 111 struct fb_info *info); 112 113 bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper); 114 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, 115 uint32_t fb_width, uint32_t fb_height); 116 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, 117 uint32_t depth); 118 119 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info); 120 121 int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper); 122 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel); 123 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper); 124 int drm_fb_helper_debug_enter(struct fb_info *info); 125 int drm_fb_helper_debug_leave(struct fb_info *info); 126 127 #endif 128