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 }; 81 82 struct drm_fb_helper { 83 struct drm_framebuffer *fb; 84 struct drm_device *dev; 85 int crtc_count; 86 struct drm_fb_helper_crtc *crtc_info; 87 int connector_count; 88 int connector_info_alloc_count; 89 struct drm_fb_helper_connector **connector_info; 90 const struct drm_fb_helper_funcs *funcs; 91 struct fb_info *fbdev; 92 u32 pseudo_palette[17]; 93 struct list_head kernel_fb_list; 94 95 /* we got a hotplug but fbdev wasn't running the console 96 delay until next set_par */ 97 bool delayed_hotplug; 98 }; 99 100 void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, 101 const struct drm_fb_helper_funcs *funcs); 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_unlocked(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 struct drm_display_mode * 127 drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, 128 int width, int height); 129 struct drm_display_mode * 130 drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, 131 int width, int height); 132 133 int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector); 134 int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, 135 struct drm_connector *connector); 136 #endif 137