2 * Copyright (c) 2006-2009 Red Hat Inc.
3 * Copyright (c) 2006-2008 Intel Corporation
4 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
6 * DRM framebuffer helper functions
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.
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
27 * Dave Airlie <airlied@linux.ie>
28 * Jesse Barnes <jesse.barnes@intel.com>
30 #ifndef DRM_FB_HELPER_H
31 #define DRM_FB_HELPER_H
35 #include <linux/kgdb.h>
37 struct drm_fb_offset {
41 struct drm_fb_helper_crtc {
42 struct drm_mode_set mode_set;
43 struct drm_display_mode *desired_mode;
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
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.
63 * So what is passed to drm_fb_helper_fill_var() should be fb_width/fb_height,
64 * rather than the surface size.
66 struct drm_fb_helper_surface_size {
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.
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
86 * Driver callbacks used by the fbdev emulation helper library.
88 struct drm_fb_helper_funcs {
89 void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green,
91 void (*gamma_get)(struct drm_crtc *crtc, u16 *red, u16 *green,
92 u16 *blue, int regno);
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);
103 struct drm_fb_helper_connector {
104 struct drm_connector *connector;
107 struct drm_fb_helper {
108 struct drm_framebuffer *fb;
109 struct drm_device *dev;
111 struct drm_fb_helper_crtc *crtc_info;
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;
120 /* we got a hotplug but fbdev wasn't running the console
121 delay until next set_par */
122 bool delayed_hotplug;
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,
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);
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,
144 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
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);
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);