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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 <linux/kgdb.h>
37
38enum mode_set_atomic {
39 LEAVE_ATOMIC_MODE_SET,
40 ENTER_ATOMIC_MODE_SET,
41};
42
43struct drm_fb_offset {
44 int x, y;
45};
46
47struct drm_fb_helper_crtc {
48 struct drm_mode_set mode_set;
49 struct drm_display_mode *desired_mode;
50 int x, y;
51};
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72struct drm_fb_helper_surface_size {
73 u32 fb_width;
74 u32 fb_height;
75 u32 surface_width;
76 u32 surface_height;
77 u32 surface_bpp;
78 u32 surface_depth;
79};
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86struct drm_fb_helper_funcs {
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100 void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green,
101 u16 blue, int regno);
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116 void (*gamma_get)(struct drm_crtc *crtc, u16 *red, u16 *green,
117 u16 *blue, int regno);
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133 int (*fb_probe)(struct drm_fb_helper *helper,
134 struct drm_fb_helper_surface_size *sizes);
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153 bool (*initial_config)(struct drm_fb_helper *fb_helper,
154 struct drm_fb_helper_crtc **crtcs,
155 struct drm_display_mode **modes,
156 struct drm_fb_offset *offsets,
157 bool *enabled, int width, int height);
158};
159
160struct drm_fb_helper_connector {
161 struct drm_connector *connector;
162};
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187struct drm_fb_helper {
188 struct drm_framebuffer *fb;
189 struct drm_device *dev;
190 int crtc_count;
191 struct drm_fb_helper_crtc *crtc_info;
192 int connector_count;
193 int connector_info_alloc_count;
194 struct drm_fb_helper_connector **connector_info;
195 const struct drm_fb_helper_funcs *funcs;
196 struct fb_info *fbdev;
197 u32 pseudo_palette[17];
198 struct drm_clip_rect dirty_clip;
199 spinlock_t dirty_lock;
200 struct work_struct dirty_work;
201 struct work_struct resume_work;
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208 struct list_head kernel_fb_list;
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217 bool delayed_hotplug;
218};
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226#define DRM_FB_HELPER_DEFAULT_OPS \
227 .fb_check_var = drm_fb_helper_check_var, \
228 .fb_set_par = drm_fb_helper_set_par, \
229 .fb_setcmap = drm_fb_helper_setcmap, \
230 .fb_blank = drm_fb_helper_blank, \
231 .fb_pan_display = drm_fb_helper_pan_display
232
233#ifdef CONFIG_DRM_FBDEV_EMULATION
234void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper,
235 const struct drm_fb_helper_funcs *funcs);
236int drm_fb_helper_init(struct drm_device *dev,
237 struct drm_fb_helper *helper, int crtc_count,
238 int max_conn);
239void drm_fb_helper_fini(struct drm_fb_helper *helper);
240int drm_fb_helper_blank(int blank, struct fb_info *info);
241int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
242 struct fb_info *info);
243int drm_fb_helper_set_par(struct fb_info *info);
244int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
245 struct fb_info *info);
246
247int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper);
248
249struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper);
250void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper);
251void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper);
252void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
253 uint32_t fb_width, uint32_t fb_height);
254void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
255 uint32_t depth);
256
257void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper);
258
259void drm_fb_helper_deferred_io(struct fb_info *info,
260 struct list_head *pagelist);
261
262ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf,
263 size_t count, loff_t *ppos);
264ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf,
265 size_t count, loff_t *ppos);
266
267void drm_fb_helper_sys_fillrect(struct fb_info *info,
268 const struct fb_fillrect *rect);
269void drm_fb_helper_sys_copyarea(struct fb_info *info,
270 const struct fb_copyarea *area);
271void drm_fb_helper_sys_imageblit(struct fb_info *info,
272 const struct fb_image *image);
273
274void drm_fb_helper_cfb_fillrect(struct fb_info *info,
275 const struct fb_fillrect *rect);
276void drm_fb_helper_cfb_copyarea(struct fb_info *info,
277 const struct fb_copyarea *area);
278void drm_fb_helper_cfb_imageblit(struct fb_info *info,
279 const struct fb_image *image);
280
281void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, bool suspend);
282void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper,
283 bool suspend);
284
285int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
286
287int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
288int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel);
289int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper);
290int drm_fb_helper_debug_enter(struct fb_info *info);
291int drm_fb_helper_debug_leave(struct fb_info *info);
292struct drm_display_mode *
293drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector,
294 int width, int height);
295struct drm_display_mode *
296drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
297 int width, int height);
298
299int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector);
300int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
301 struct drm_connector *connector);
302#else
303static inline void drm_fb_helper_prepare(struct drm_device *dev,
304 struct drm_fb_helper *helper,
305 const struct drm_fb_helper_funcs *funcs)
306{
307}
308
309static inline int drm_fb_helper_init(struct drm_device *dev,
310 struct drm_fb_helper *helper, int crtc_count,
311 int max_conn)
312{
313 return 0;
314}
315
316static inline void drm_fb_helper_fini(struct drm_fb_helper *helper)
317{
318}
319
320static inline int drm_fb_helper_blank(int blank, struct fb_info *info)
321{
322 return 0;
323}
324
325static inline int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
326 struct fb_info *info)
327{
328 return 0;
329}
330
331static inline int drm_fb_helper_set_par(struct fb_info *info)
332{
333 return 0;
334}
335
336static inline int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
337 struct fb_info *info)
338{
339 return 0;
340}
341
342static inline int
343drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper)
344{
345 return 0;
346}
347
348static inline struct fb_info *
349drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper)
350{
351 return NULL;
352}
353
354static inline void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper)
355{
356}
357static inline void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper)
358{
359}
360
361static inline void drm_fb_helper_fill_var(struct fb_info *info,
362 struct drm_fb_helper *fb_helper,
363 uint32_t fb_width, uint32_t fb_height)
364{
365}
366
367static inline void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
368 uint32_t depth)
369{
370}
371
372static inline int drm_fb_helper_setcmap(struct fb_cmap *cmap,
373 struct fb_info *info)
374{
375 return 0;
376}
377
378static inline void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper)
379{
380}
381
382static inline void drm_fb_helper_deferred_io(struct fb_info *info,
383 struct list_head *pagelist)
384{
385}
386
387static inline ssize_t drm_fb_helper_sys_read(struct fb_info *info,
388 char __user *buf, size_t count,
389 loff_t *ppos)
390{
391 return -ENODEV;
392}
393
394static inline ssize_t drm_fb_helper_sys_write(struct fb_info *info,
395 const char __user *buf,
396 size_t count, loff_t *ppos)
397{
398 return -ENODEV;
399}
400
401static inline void drm_fb_helper_sys_fillrect(struct fb_info *info,
402 const struct fb_fillrect *rect)
403{
404}
405
406static inline void drm_fb_helper_sys_copyarea(struct fb_info *info,
407 const struct fb_copyarea *area)
408{
409}
410
411static inline void drm_fb_helper_sys_imageblit(struct fb_info *info,
412 const struct fb_image *image)
413{
414}
415
416static inline void drm_fb_helper_cfb_fillrect(struct fb_info *info,
417 const struct fb_fillrect *rect)
418{
419}
420
421static inline void drm_fb_helper_cfb_copyarea(struct fb_info *info,
422 const struct fb_copyarea *area)
423{
424}
425
426static inline void drm_fb_helper_cfb_imageblit(struct fb_info *info,
427 const struct fb_image *image)
428{
429}
430
431static inline void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper,
432 bool suspend)
433{
434}
435
436static inline void
437drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper, bool suspend)
438{
439}
440
441static inline int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
442{
443 return 0;
444}
445
446static inline int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper,
447 int bpp_sel)
448{
449 return 0;
450}
451
452static inline int
453drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
454{
455 return 0;
456}
457
458static inline int drm_fb_helper_debug_enter(struct fb_info *info)
459{
460 return 0;
461}
462
463static inline int drm_fb_helper_debug_leave(struct fb_info *info)
464{
465 return 0;
466}
467
468static inline struct drm_display_mode *
469drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector,
470 int width, int height)
471{
472 return NULL;
473}
474
475static inline struct drm_display_mode *
476drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
477 int width, int height)
478{
479 return NULL;
480}
481
482static inline int
483drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper,
484 struct drm_connector *connector)
485{
486 return 0;
487}
488
489static inline int
490drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
491 struct drm_connector *connector)
492{
493 return 0;
494}
495
496#endif
497
498static inline int
499drm_fb_helper_remove_conflicting_framebuffers(struct apertures_struct *a,
500 const char *name, bool primary)
501{
502#if IS_REACHABLE(CONFIG_FB)
503 return remove_conflicting_framebuffers(a, name, primary);
504#else
505 return 0;
506#endif
507}
508
509#endif
510