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
33struct drm_fb_helper;
34
35#include <linux/kgdb.h>
36
37#ifdef __NetBSD__
38#include <sys/device_if.h>
39#endif
40
41struct drm_fb_helper_crtc {
42 struct drm_mode_set mode_set;
43 struct drm_display_mode *desired_mode;
44};
45
46struct drm_fb_helper_surface_size {
47 u32 fb_width;
48 u32 fb_height;
49 u32 surface_width;
50 u32 surface_height;
51 u32 surface_bpp;
52 u32 surface_depth;
53};
54
55/**
56 * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library
57 * @gamma_set: Set the given gamma lut register on the given crtc.
58 * @gamma_get: Read the given gamma lut register on the given crtc, used to
59 * save the current lut when force-restoring the fbdev for e.g.
60 * kdbg.
61 * @fb_probe: Driver callback to allocate and initialize the fbdev info
62 * structure. Furthermore it also needs to allocate the drm
63 * framebuffer used to back the fbdev.
64 * @initial_config: Setup an initial fbdev display configuration
65 *
66 * Driver callbacks used by the fbdev emulation helper library.
67 */
68struct drm_fb_helper_funcs {
69 void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green,
70 u16 blue, int regno);
71 void (*gamma_get)(struct drm_crtc *crtc, u16 *red, u16 *green,
72 u16 *blue, int regno);
73
74 int (*fb_probe)(struct drm_fb_helper *helper,
75 struct drm_fb_helper_surface_size *sizes);
76 bool (*initial_config)(struct drm_fb_helper *fb_helper,
77 struct drm_fb_helper_crtc **crtcs,
78 struct drm_display_mode **modes,
79 bool *enabled, int width, int height);
80};
81
82struct drm_fb_helper_connector {
83 struct drm_connector *connector;
84 struct drm_cmdline_mode cmdline_mode;
85};
86
87struct drm_fb_helper {
88 struct drm_framebuffer *fb;
89 struct drm_device *dev;
90 int crtc_count;
91 struct drm_fb_helper_crtc *crtc_info;
92 int connector_count;
93 struct drm_fb_helper_connector **connector_info;
94 struct drm_fb_helper_funcs *funcs;
95#ifdef __NetBSD__ /* XXX fb info */
96 device_t fbdev;
97#else
98 struct fb_info *fbdev;
99#endif
100 u32 pseudo_palette[17];
101 struct list_head kernel_fb_list;
102
103 /* we got a hotplug but fbdev wasn't running the console
104 delay until next set_par */
105 bool delayed_hotplug;
106};
107
108int drm_fb_helper_init(struct drm_device *dev,
109 struct drm_fb_helper *helper, int crtc_count,
110 int max_conn);
111void drm_fb_helper_fini(struct drm_fb_helper *helper);
112#ifdef __NetBSD__ /* XXX fb info */
113int drm_fb_helper_set_config(struct drm_fb_helper *);
114#else
115int drm_fb_helper_blank(int blank, struct fb_info *info);
116int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
117 struct fb_info *info);
118int drm_fb_helper_set_par(struct fb_info *info);
119int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
120 struct fb_info *info);
121#endif
122
123bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper);
124#ifndef __NetBSD__ /* XXX fb info */
125void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
126 uint32_t fb_width, uint32_t fb_height);
127void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
128 uint32_t depth);
129#endif
130
131#ifndef __NetBSD__ /* XXX fb cmap */
132int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
133#endif
134
135int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
136bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel);
137int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper);
138#ifndef __NetBSD__ /* XXX fb info */
139int drm_fb_helper_debug_enter(struct fb_info *info);
140int drm_fb_helper_debug_leave(struct fb_info *info);
141#endif
142int drm_fb_helper_debug_enter_fb(struct drm_fb_helper *fb_helper);
143int drm_fb_helper_debug_leave_fb(struct drm_fb_helper *fb_helper);
144struct drm_display_mode *
145drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector,
146 int width, int height);
147struct drm_display_mode *
148drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
149 int width, int height);
150
151#endif
152