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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
37struct drm_fb_helper_crtc {
38 uint32_t crtc_id;
39 struct drm_mode_set mode_set;
40 struct drm_display_mode *desired_mode;
41};
42
43struct drm_fb_helper_surface_size {
44 u32 fb_width;
45 u32 fb_height;
46 u32 surface_width;
47 u32 surface_height;
48 u32 surface_bpp;
49 u32 surface_depth;
50};
51
52struct drm_fb_helper_funcs {
53 void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green,
54 u16 blue, int regno);
55 void (*gamma_get)(struct drm_crtc *crtc, u16 *red, u16 *green,
56 u16 *blue, int regno);
57
58 int (*fb_probe)(struct drm_fb_helper *helper,
59 struct drm_fb_helper_surface_size *sizes);
60};
61
62struct drm_fb_helper_connector {
63 struct drm_connector *connector;
64 struct drm_cmdline_mode cmdline_mode;
65};
66
67struct drm_fb_helper {
68 struct drm_framebuffer *fb;
69 struct drm_framebuffer *saved_fb;
70 struct drm_device *dev;
71 struct drm_display_mode *mode;
72 int crtc_count;
73 struct drm_fb_helper_crtc *crtc_info;
74 int connector_count;
75 struct drm_fb_helper_connector **connector_info;
76 struct drm_fb_helper_funcs *funcs;
77 int conn_limit;
78 struct fb_info *fbdev;
79 u32 pseudo_palette[17];
80 struct list_head kernel_fb_list;
81
82 /* we got a hotplug but fbdev wasn't running the console
83 delay until next set_par */
84 bool delayed_hotplug;
85};
86
87int drm_fb_helper_single_fb_probe(struct drm_fb_helper *helper,
88 int preferred_bpp);
89
90int drm_fb_helper_init(struct drm_device *dev,
91 struct drm_fb_helper *helper, int crtc_count,
92 int max_conn);
93void drm_fb_helper_fini(struct drm_fb_helper *helper);
94int drm_fb_helper_blank(int blank, struct fb_info *info);
95int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
96 struct fb_info *info);
97int drm_fb_helper_set_par(struct fb_info *info);
98int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
99 struct fb_info *info);
100int drm_fb_helper_setcolreg(unsigned regno,
101 unsigned red,
102 unsigned green,
103 unsigned blue,
104 unsigned transp,
105 struct fb_info *info);
106
107bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper);
108void drm_fb_helper_restore(void);
109void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
110 uint32_t fb_width, uint32_t fb_height);
111void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
112 uint32_t depth);
113
114int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
115
116int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
117bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel);
118int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper);
119int drm_fb_helper_debug_enter(struct fb_info *info);
120int drm_fb_helper_debug_leave(struct fb_info *info);
121
122#endif
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 <drm/drm_crtc.h>
36#include <drm/drm_device.h>
37#include <linux/kgdb.h>
38
39enum mode_set_atomic {
40 LEAVE_ATOMIC_MODE_SET,
41 ENTER_ATOMIC_MODE_SET,
42};
43
44struct drm_fb_offset {
45 int x, y;
46};
47
48struct drm_fb_helper_crtc {
49 struct drm_mode_set mode_set;
50 struct drm_display_mode *desired_mode;
51 int x, y;
52 int rotation;
53};
54
55/**
56 * struct drm_fb_helper_surface_size - describes fbdev size and scanout surface size
57 * @fb_width: fbdev width
58 * @fb_height: fbdev height
59 * @surface_width: scanout buffer width
60 * @surface_height: scanout buffer height
61 * @surface_bpp: scanout buffer bpp
62 * @surface_depth: scanout buffer depth
63 *
64 * Note that the scanout surface width/height may be larger than the fbdev
65 * width/height. In case of multiple displays, the scanout surface is sized
66 * according to the largest width/height (so it is large enough for all CRTCs
67 * to scanout). But the fbdev width/height is sized to the minimum width/
68 * height of all the displays. This ensures that fbcon fits on the smallest
69 * of the attached displays.
70 *
71 * So what is passed to drm_fb_helper_fill_var() should be fb_width/fb_height,
72 * rather than the surface size.
73 */
74struct drm_fb_helper_surface_size {
75 u32 fb_width;
76 u32 fb_height;
77 u32 surface_width;
78 u32 surface_height;
79 u32 surface_bpp;
80 u32 surface_depth;
81};
82
83/**
84 * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library
85 *
86 * Driver callbacks used by the fbdev emulation helper library.
87 */
88struct drm_fb_helper_funcs {
89 /**
90 * @fb_probe:
91 *
92 * Driver callback to allocate and initialize the fbdev info structure.
93 * Furthermore it also needs to allocate the DRM framebuffer used to
94 * back the fbdev.
95 *
96 * This callback is mandatory.
97 *
98 * RETURNS:
99 *
100 * The driver should return 0 on success and a negative error code on
101 * failure.
102 */
103 int (*fb_probe)(struct drm_fb_helper *helper,
104 struct drm_fb_helper_surface_size *sizes);
105
106 /**
107 * @initial_config:
108 *
109 * Driver callback to setup an initial fbdev display configuration.
110 * Drivers can use this callback to tell the fbdev emulation what the
111 * preferred initial configuration is. This is useful to implement
112 * smooth booting where the fbdev (and subsequently all userspace) never
113 * changes the mode, but always inherits the existing configuration.
114 *
115 * This callback is optional.
116 *
117 * RETURNS:
118 *
119 * The driver should return true if a suitable initial configuration has
120 * been filled out and false when the fbdev helper should fall back to
121 * the default probing logic.
122 */
123 bool (*initial_config)(struct drm_fb_helper *fb_helper,
124 struct drm_fb_helper_crtc **crtcs,
125 struct drm_display_mode **modes,
126 struct drm_fb_offset *offsets,
127 bool *enabled, int width, int height);
128};
129
130struct drm_fb_helper_connector {
131 struct drm_connector *connector;
132};
133
134/**
135 * struct drm_fb_helper - main structure to emulate fbdev on top of KMS
136 * @fb: Scanout framebuffer object
137 * @dev: DRM device
138 * @crtc_count: number of possible CRTCs
139 * @crtc_info: per-CRTC helper state (mode, x/y offset, etc)
140 * @connector_count: number of connected connectors
141 * @connector_info_alloc_count: size of connector_info
142 * @funcs: driver callbacks for fb helper
143 * @fbdev: emulated fbdev device info struct
144 * @pseudo_palette: fake palette of 16 colors
145 * @dirty_clip: clip rectangle used with deferred_io to accumulate damage to
146 * the screen buffer
147 * @dirty_lock: spinlock protecting @dirty_clip
148 * @dirty_work: worker used to flush the framebuffer
149 * @resume_work: worker used during resume if the console lock is already taken
150 *
151 * This is the main structure used by the fbdev helpers. Drivers supporting
152 * fbdev emulation should embedded this into their overall driver structure.
153 * Drivers must also fill out a &struct drm_fb_helper_funcs with a few
154 * operations.
155 */
156struct drm_fb_helper {
157 struct drm_framebuffer *fb;
158 struct drm_device *dev;
159 int crtc_count;
160 struct drm_fb_helper_crtc *crtc_info;
161 int connector_count;
162 int connector_info_alloc_count;
163 /**
164 * @sw_rotations:
165 * Bitmask of all rotations requested for panel-orientation which
166 * could not be handled in hardware. If only one bit is set
167 * fbdev->fbcon_rotate_hint gets set to the requested rotation.
168 */
169 int sw_rotations;
170 /**
171 * @connector_info:
172 *
173 * Array of per-connector information. Do not iterate directly, but use
174 * drm_fb_helper_for_each_connector.
175 */
176 struct drm_fb_helper_connector **connector_info;
177 const struct drm_fb_helper_funcs *funcs;
178 struct fb_info *fbdev;
179 u32 pseudo_palette[17];
180 struct drm_clip_rect dirty_clip;
181 spinlock_t dirty_lock;
182 struct work_struct dirty_work;
183 struct work_struct resume_work;
184
185 /**
186 * @lock:
187 *
188 * Top-level FBDEV helper lock. This protects all internal data
189 * structures and lists, such as @connector_info and @crtc_info.
190 *
191 * FIXME: fbdev emulation locking is a mess and long term we want to
192 * protect all helper internal state with this lock as well as reduce
193 * core KMS locking as much as possible.
194 */
195 struct mutex lock;
196
197 /**
198 * @kernel_fb_list:
199 *
200 * Entry on the global kernel_fb_helper_list, used for kgdb entry/exit.
201 */
202 struct list_head kernel_fb_list;
203
204 /**
205 * @delayed_hotplug:
206 *
207 * A hotplug was received while fbdev wasn't in control of the DRM
208 * device, i.e. another KMS master was active. The output configuration
209 * needs to be reprobe when fbdev is in control again.
210 */
211 bool delayed_hotplug;
212
213 /**
214 * @deferred_setup:
215 *
216 * If no outputs are connected (disconnected or unknown) the FB helper
217 * code will defer setup until at least one of the outputs shows up.
218 * This field keeps track of the status so that setup can be retried
219 * at every hotplug event until it succeeds eventually.
220 *
221 * Protected by @lock.
222 */
223 bool deferred_setup;
224
225 /**
226 * @preferred_bpp:
227 *
228 * Temporary storage for the driver's preferred BPP setting passed to
229 * FB helper initialization. This needs to be tracked so that deferred
230 * FB helper setup can pass this on.
231 *
232 * See also: @deferred_setup
233 */
234 int preferred_bpp;
235};
236
237/**
238 * define DRM_FB_HELPER_DEFAULT_OPS - helper define for drm drivers
239 *
240 * Helper define to register default implementations of drm_fb_helper
241 * functions. To be used in struct fb_ops of drm drivers.
242 */
243#define DRM_FB_HELPER_DEFAULT_OPS \
244 .fb_check_var = drm_fb_helper_check_var, \
245 .fb_set_par = drm_fb_helper_set_par, \
246 .fb_setcmap = drm_fb_helper_setcmap, \
247 .fb_blank = drm_fb_helper_blank, \
248 .fb_pan_display = drm_fb_helper_pan_display, \
249 .fb_debug_enter = drm_fb_helper_debug_enter, \
250 .fb_debug_leave = drm_fb_helper_debug_leave, \
251 .fb_ioctl = drm_fb_helper_ioctl
252
253#ifdef CONFIG_DRM_FBDEV_EMULATION
254void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper,
255 const struct drm_fb_helper_funcs *funcs);
256int drm_fb_helper_init(struct drm_device *dev,
257 struct drm_fb_helper *helper, int max_conn);
258void drm_fb_helper_fini(struct drm_fb_helper *helper);
259int drm_fb_helper_blank(int blank, struct fb_info *info);
260int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
261 struct fb_info *info);
262int drm_fb_helper_set_par(struct fb_info *info);
263int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
264 struct fb_info *info);
265
266int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper);
267
268struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper);
269void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper);
270void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
271 uint32_t fb_width, uint32_t fb_height);
272void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
273 uint32_t depth);
274
275void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper);
276
277void drm_fb_helper_deferred_io(struct fb_info *info,
278 struct list_head *pagelist);
279int drm_fb_helper_defio_init(struct drm_fb_helper *fb_helper);
280
281ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf,
282 size_t count, loff_t *ppos);
283ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf,
284 size_t count, loff_t *ppos);
285
286void drm_fb_helper_sys_fillrect(struct fb_info *info,
287 const struct fb_fillrect *rect);
288void drm_fb_helper_sys_copyarea(struct fb_info *info,
289 const struct fb_copyarea *area);
290void drm_fb_helper_sys_imageblit(struct fb_info *info,
291 const struct fb_image *image);
292
293void drm_fb_helper_cfb_fillrect(struct fb_info *info,
294 const struct fb_fillrect *rect);
295void drm_fb_helper_cfb_copyarea(struct fb_info *info,
296 const struct fb_copyarea *area);
297void drm_fb_helper_cfb_imageblit(struct fb_info *info,
298 const struct fb_image *image);
299
300void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, bool suspend);
301void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper,
302 bool suspend);
303
304int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
305
306int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd,
307 unsigned long arg);
308
309int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
310int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel);
311int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper);
312int drm_fb_helper_debug_enter(struct fb_info *info);
313int drm_fb_helper_debug_leave(struct fb_info *info);
314struct drm_display_mode *
315drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector,
316 int width, int height);
317struct drm_display_mode *
318drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn);
319
320int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector);
321int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
322 struct drm_connector *connector);
323
324int drm_fb_helper_fbdev_setup(struct drm_device *dev,
325 struct drm_fb_helper *fb_helper,
326 const struct drm_fb_helper_funcs *funcs,
327 unsigned int preferred_bpp,
328 unsigned int max_conn_count);
329void drm_fb_helper_fbdev_teardown(struct drm_device *dev);
330
331void drm_fb_helper_lastclose(struct drm_device *dev);
332void drm_fb_helper_output_poll_changed(struct drm_device *dev);
333#else
334static inline void drm_fb_helper_prepare(struct drm_device *dev,
335 struct drm_fb_helper *helper,
336 const struct drm_fb_helper_funcs *funcs)
337{
338}
339
340static inline int drm_fb_helper_init(struct drm_device *dev,
341 struct drm_fb_helper *helper,
342 int max_conn)
343{
344 /* So drivers can use it to free the struct */
345 helper->dev = dev;
346 dev->fb_helper = helper;
347
348 return 0;
349}
350
351static inline void drm_fb_helper_fini(struct drm_fb_helper *helper)
352{
353 if (helper && helper->dev)
354 helper->dev->fb_helper = NULL;
355}
356
357static inline int drm_fb_helper_blank(int blank, struct fb_info *info)
358{
359 return 0;
360}
361
362static inline int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
363 struct fb_info *info)
364{
365 return 0;
366}
367
368static inline int drm_fb_helper_set_par(struct fb_info *info)
369{
370 return 0;
371}
372
373static inline int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
374 struct fb_info *info)
375{
376 return 0;
377}
378
379static inline int
380drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper)
381{
382 return 0;
383}
384
385static inline struct fb_info *
386drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper)
387{
388 return NULL;
389}
390
391static inline void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper)
392{
393}
394
395static inline void drm_fb_helper_fill_var(struct fb_info *info,
396 struct drm_fb_helper *fb_helper,
397 uint32_t fb_width, uint32_t fb_height)
398{
399}
400
401static inline void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
402 uint32_t depth)
403{
404}
405
406static inline int drm_fb_helper_setcmap(struct fb_cmap *cmap,
407 struct fb_info *info)
408{
409 return 0;
410}
411
412static inline int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd,
413 unsigned long arg)
414{
415 return 0;
416}
417
418static inline void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper)
419{
420}
421
422static inline void drm_fb_helper_deferred_io(struct fb_info *info,
423 struct list_head *pagelist)
424{
425}
426
427static inline int drm_fb_helper_defio_init(struct drm_fb_helper *fb_helper)
428{
429 return -ENODEV;
430}
431
432static inline ssize_t drm_fb_helper_sys_read(struct fb_info *info,
433 char __user *buf, size_t count,
434 loff_t *ppos)
435{
436 return -ENODEV;
437}
438
439static inline ssize_t drm_fb_helper_sys_write(struct fb_info *info,
440 const char __user *buf,
441 size_t count, loff_t *ppos)
442{
443 return -ENODEV;
444}
445
446static inline void drm_fb_helper_sys_fillrect(struct fb_info *info,
447 const struct fb_fillrect *rect)
448{
449}
450
451static inline void drm_fb_helper_sys_copyarea(struct fb_info *info,
452 const struct fb_copyarea *area)
453{
454}
455
456static inline void drm_fb_helper_sys_imageblit(struct fb_info *info,
457 const struct fb_image *image)
458{
459}
460
461static inline void drm_fb_helper_cfb_fillrect(struct fb_info *info,
462 const struct fb_fillrect *rect)
463{
464}
465
466static inline void drm_fb_helper_cfb_copyarea(struct fb_info *info,
467 const struct fb_copyarea *area)
468{
469}
470
471static inline void drm_fb_helper_cfb_imageblit(struct fb_info *info,
472 const struct fb_image *image)
473{
474}
475
476static inline void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper,
477 bool suspend)
478{
479}
480
481static inline void
482drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper, bool suspend)
483{
484}
485
486static inline int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
487{
488 return 0;
489}
490
491static inline int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper,
492 int bpp_sel)
493{
494 return 0;
495}
496
497static inline int
498drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
499{
500 return 0;
501}
502
503static inline int drm_fb_helper_debug_enter(struct fb_info *info)
504{
505 return 0;
506}
507
508static inline int drm_fb_helper_debug_leave(struct fb_info *info)
509{
510 return 0;
511}
512
513static inline struct drm_display_mode *
514drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector,
515 int width, int height)
516{
517 return NULL;
518}
519
520static inline struct drm_display_mode *
521drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
522 int width, int height)
523{
524 return NULL;
525}
526
527static inline int
528drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper,
529 struct drm_connector *connector)
530{
531 return 0;
532}
533
534static inline int
535drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
536 struct drm_connector *connector)
537{
538 return 0;
539}
540
541static inline int
542drm_fb_helper_fbdev_setup(struct drm_device *dev,
543 struct drm_fb_helper *fb_helper,
544 const struct drm_fb_helper_funcs *funcs,
545 unsigned int preferred_bpp,
546 unsigned int max_conn_count)
547{
548 /* So drivers can use it to free the struct */
549 dev->fb_helper = fb_helper;
550
551 return 0;
552}
553
554static inline void drm_fb_helper_fbdev_teardown(struct drm_device *dev)
555{
556 dev->fb_helper = NULL;
557}
558
559static inline void drm_fb_helper_lastclose(struct drm_device *dev)
560{
561}
562
563static inline void drm_fb_helper_output_poll_changed(struct drm_device *dev)
564{
565}
566
567#endif
568
569static inline int
570drm_fb_helper_remove_conflicting_framebuffers(struct apertures_struct *a,
571 const char *name, bool primary)
572{
573#if IS_REACHABLE(CONFIG_FB)
574 return remove_conflicting_framebuffers(a, name, primary);
575#else
576 return 0;
577#endif
578}
579
580#endif