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785b93ef DA |
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 | ||
4abe3520 DA |
33 | struct drm_fb_helper; |
34 | ||
1a7aba7f JB |
35 | #include <linux/kgdb.h> |
36 | ||
b0ee9e7f DA |
37 | struct drm_fb_offset { |
38 | int x, y; | |
39 | }; | |
40 | ||
785b93ef | 41 | struct drm_fb_helper_crtc { |
785b93ef | 42 | struct drm_mode_set mode_set; |
8be48d92 | 43 | struct drm_display_mode *desired_mode; |
b0ee9e7f | 44 | int x, y; |
785b93ef DA |
45 | }; |
46 | ||
b7b5ee59 RC |
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 | */ | |
38651674 DA |
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 | ||
207fd329 DV |
75 | /** |
76 | * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library | |
7b97936f VS |
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 | |
e227867f | 82 | * structure. Furthermore it also needs to allocate the drm |
7b97936f VS |
83 | * framebuffer used to back the fbdev. |
84 | * @initial_config: Setup an initial fbdev display configuration | |
207fd329 DV |
85 | * |
86 | * Driver callbacks used by the fbdev emulation helper library. | |
87 | */ | |
4abe3520 DA |
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); | |
11e17a08 JB |
96 | bool (*initial_config)(struct drm_fb_helper *fb_helper, |
97 | struct drm_fb_helper_crtc **crtcs, | |
98 | struct drm_display_mode **modes, | |
b0ee9e7f | 99 | struct drm_fb_offset *offsets, |
11e17a08 | 100 | bool *enabled, int width, int height); |
4abe3520 DA |
101 | }; |
102 | ||
d50ba256 | 103 | struct drm_fb_helper_connector { |
0b4c0f3f | 104 | struct drm_connector *connector; |
d50ba256 DA |
105 | }; |
106 | ||
785b93ef DA |
107 | struct drm_fb_helper { |
108 | struct drm_framebuffer *fb; | |
109 | struct drm_device *dev; | |
785b93ef DA |
110 | int crtc_count; |
111 | struct drm_fb_helper_crtc *crtc_info; | |
0b4c0f3f | 112 | int connector_count; |
65c2a89c | 113 | int connector_info_alloc_count; |
0b4c0f3f | 114 | struct drm_fb_helper_connector **connector_info; |
3a493879 | 115 | const struct drm_fb_helper_funcs *funcs; |
38651674 DA |
116 | struct fb_info *fbdev; |
117 | u32 pseudo_palette[17]; | |
785b93ef | 118 | struct list_head kernel_fb_list; |
8be48d92 | 119 | |
4abe3520 DA |
120 | /* we got a hotplug but fbdev wasn't running the console |
121 | delay until next set_par */ | |
122 | bool delayed_hotplug; | |
785b93ef DA |
123 | }; |
124 | ||
a03fdcb1 | 125 | #ifdef CONFIG_DRM_FBDEV_EMULATION |
10a23102 TR |
126 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, |
127 | const struct drm_fb_helper_funcs *funcs); | |
4abe3520 DA |
128 | int drm_fb_helper_init(struct drm_device *dev, |
129 | struct drm_fb_helper *helper, int crtc_count, | |
eb1f8e4f | 130 | int max_conn); |
4abe3520 | 131 | void drm_fb_helper_fini(struct drm_fb_helper *helper); |
785b93ef DA |
132 | int drm_fb_helper_blank(int blank, struct fb_info *info); |
133 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, | |
134 | struct fb_info *info); | |
135 | int drm_fb_helper_set_par(struct fb_info *info); | |
136 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, | |
137 | struct fb_info *info); | |
785b93ef | 138 | |
5ea1f752 | 139 | bool drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper); |
b8017d6c AT |
140 | |
141 | struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper); | |
142 | void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper); | |
143 | void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper); | |
38651674 | 144 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef | 145 | uint32_t fb_width, uint32_t fb_height); |
3632ef89 DA |
146 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
147 | uint32_t depth); | |
148 | ||
47074ab7 AT |
149 | void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper); |
150 | ||
cbb1a82e AT |
151 | ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf, |
152 | size_t count, loff_t *ppos); | |
153 | ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf, | |
154 | size_t count, loff_t *ppos); | |
155 | ||
742547b7 AT |
156 | void drm_fb_helper_sys_fillrect(struct fb_info *info, |
157 | const struct fb_fillrect *rect); | |
158 | void drm_fb_helper_sys_copyarea(struct fb_info *info, | |
159 | const struct fb_copyarea *area); | |
160 | void drm_fb_helper_sys_imageblit(struct fb_info *info, | |
161 | const struct fb_image *image); | |
162 | ||
163 | void drm_fb_helper_cfb_fillrect(struct fb_info *info, | |
164 | const struct fb_fillrect *rect); | |
165 | void drm_fb_helper_cfb_copyarea(struct fb_info *info, | |
166 | const struct fb_copyarea *area); | |
167 | void drm_fb_helper_cfb_imageblit(struct fb_info *info, | |
168 | const struct fb_image *image); | |
169 | ||
fdefa58a AT |
170 | void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, int state); |
171 | ||
068143d3 | 172 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info); |
d50ba256 | 173 | |
7394371d | 174 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper); |
01934c2a | 175 | int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel); |
0b4c0f3f | 176 | int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper); |
1a7aba7f JB |
177 | int drm_fb_helper_debug_enter(struct fb_info *info); |
178 | int drm_fb_helper_debug_leave(struct fb_info *info); | |
2f1046f3 JB |
179 | struct drm_display_mode * |
180 | drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, | |
181 | int width, int height); | |
182 | struct drm_display_mode * | |
183 | drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, | |
184 | int width, int height); | |
8be48d92 | 185 | |
65c2a89c DA |
186 | int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector); |
187 | int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, | |
188 | struct drm_connector *connector); | |
a03fdcb1 AT |
189 | #else |
190 | static inline void drm_fb_helper_prepare(struct drm_device *dev, | |
191 | struct drm_fb_helper *helper, | |
192 | const struct drm_fb_helper_funcs *funcs) | |
193 | { | |
194 | } | |
195 | ||
196 | static inline int drm_fb_helper_init(struct drm_device *dev, | |
197 | struct drm_fb_helper *helper, int crtc_count, | |
198 | int max_conn) | |
199 | { | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static inline void drm_fb_helper_fini(struct drm_fb_helper *helper) | |
204 | { | |
205 | } | |
206 | ||
207 | static inline int drm_fb_helper_blank(int blank, struct fb_info *info) | |
208 | { | |
209 | return 0; | |
210 | } | |
211 | ||
212 | static inline int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, | |
213 | struct fb_info *info) | |
214 | { | |
215 | return 0; | |
216 | } | |
217 | ||
218 | static inline int drm_fb_helper_set_par(struct fb_info *info) | |
219 | { | |
220 | return 0; | |
221 | } | |
222 | ||
223 | static inline int drm_fb_helper_check_var(struct fb_var_screeninfo *var, | |
224 | struct fb_info *info) | |
225 | { | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static inline bool | |
230 | drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) | |
231 | { | |
232 | return true; | |
233 | } | |
234 | ||
235 | static inline struct fb_info * | |
236 | drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper) | |
237 | { | |
238 | return NULL; | |
239 | } | |
240 | ||
241 | static inline void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper) | |
242 | { | |
243 | } | |
244 | static inline void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper) | |
245 | { | |
246 | } | |
247 | ||
248 | static inline void drm_fb_helper_fill_var(struct fb_info *info, | |
249 | struct drm_fb_helper *fb_helper, | |
250 | uint32_t fb_width, uint32_t fb_height) | |
251 | { | |
252 | } | |
253 | ||
254 | static inline void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, | |
255 | uint32_t depth) | |
256 | { | |
257 | } | |
258 | ||
259 | static inline int drm_fb_helper_setcmap(struct fb_cmap *cmap, | |
260 | struct fb_info *info) | |
261 | { | |
262 | return 0; | |
263 | } | |
264 | ||
265 | static inline void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper) | |
266 | { | |
267 | } | |
268 | ||
269 | static inline ssize_t drm_fb_helper_sys_read(struct fb_info *info, | |
270 | char __user *buf, size_t count, | |
271 | loff_t *ppos) | |
272 | { | |
273 | return -ENODEV; | |
274 | } | |
275 | ||
276 | static inline ssize_t drm_fb_helper_sys_write(struct fb_info *info, | |
277 | const char __user *buf, | |
278 | size_t count, loff_t *ppos) | |
279 | { | |
280 | return -ENODEV; | |
281 | } | |
282 | ||
283 | static inline void drm_fb_helper_sys_fillrect(struct fb_info *info, | |
284 | const struct fb_fillrect *rect) | |
285 | { | |
286 | } | |
287 | ||
288 | static inline void drm_fb_helper_sys_copyarea(struct fb_info *info, | |
289 | const struct fb_copyarea *area) | |
290 | { | |
291 | } | |
292 | ||
293 | static inline void drm_fb_helper_sys_imageblit(struct fb_info *info, | |
294 | const struct fb_image *image) | |
295 | { | |
296 | } | |
297 | ||
298 | static inline void drm_fb_helper_cfb_fillrect(struct fb_info *info, | |
299 | const struct fb_fillrect *rect) | |
300 | { | |
301 | } | |
302 | ||
303 | static inline void drm_fb_helper_cfb_copyarea(struct fb_info *info, | |
304 | const struct fb_copyarea *area) | |
305 | { | |
306 | } | |
307 | ||
308 | static inline void drm_fb_helper_cfb_imageblit(struct fb_info *info, | |
309 | const struct fb_image *image) | |
310 | { | |
311 | } | |
312 | ||
313 | static inline void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, | |
314 | int state) | |
315 | { | |
316 | } | |
317 | ||
318 | static inline int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
319 | { | |
320 | return 0; | |
321 | } | |
322 | ||
323 | static inline int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, | |
324 | int bpp_sel) | |
325 | { | |
326 | return 0; | |
327 | } | |
328 | ||
329 | static inline int | |
330 | drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) | |
331 | { | |
332 | return 0; | |
333 | } | |
334 | ||
335 | static inline int drm_fb_helper_debug_enter(struct fb_info *info) | |
336 | { | |
337 | return 0; | |
338 | } | |
339 | ||
340 | static inline int drm_fb_helper_debug_leave(struct fb_info *info) | |
341 | { | |
342 | return 0; | |
343 | } | |
344 | ||
345 | static inline struct drm_display_mode * | |
346 | drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, | |
347 | int width, int height) | |
348 | { | |
349 | return NULL; | |
350 | } | |
351 | ||
352 | static inline struct drm_display_mode * | |
353 | drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, | |
354 | int width, int height) | |
355 | { | |
356 | return NULL; | |
357 | } | |
358 | ||
359 | static inline int | |
360 | drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, | |
361 | struct drm_connector *connector) | |
362 | { | |
363 | return 0; | |
364 | } | |
365 | ||
366 | static inline int | |
367 | drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, | |
368 | struct drm_connector *connector) | |
369 | { | |
370 | return 0; | |
371 | } | |
372 | #endif | |
785b93ef | 373 | #endif |