6  * DRM framebuffer helper functions
89  * The fb helper functions are useful to provide an fbdev on top of a drm kernel
91  * helper functions used by many drivers to implement the kernel mode setting
101  * They should also notify the fb helper code from updates to the output
108  * All other functions exported by the fb helper library can be used to
113  * helper must be called first to initialize the minimum required to make
118  * encoders and connectors. To finish up the fbdev helper initialization, the
153  * @info: fbdev registered by the helper
157 	struct drm_fb_helper *helper = info->par;  in drm_fb_helper_debug_enter()  local
161 	list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {  in drm_fb_helper_debug_enter()
162 		mutex_lock(&helper->client.modeset_mutex);  in drm_fb_helper_debug_enter()
163 		drm_client_for_each_modeset(mode_set, &helper->client) {  in drm_fb_helper_debug_enter()
180 		mutex_unlock(&helper->client.modeset_mutex);  in drm_fb_helper_debug_enter()
189  * @info: fbdev registered by the helper
193 	struct drm_fb_helper *helper = info->par;  in drm_fb_helper_debug_leave()  local
194 	struct drm_client_dev *client = &helper->client;  in drm_fb_helper_debug_leave()
195 	struct drm_device *dev = helper->dev;  in drm_fb_helper_debug_leave()
269  * @fb_helper: driver-allocated fbdev helper, can be NULL
272  * when implementing an fbcon on top of kms using this helper. This ensures that
288 	struct drm_fb_helper *helper;  in drm_fb_helper_restore_work_fn()  local
291 	list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {  in drm_fb_helper_restore_work_fn()
292 		struct drm_device *dev = helper->dev;  in drm_fb_helper_restore_work_fn()
297 		mutex_lock(&helper->lock);  in drm_fb_helper_restore_work_fn()
298 		drm_client_modeset_commit_locked(&helper->client);  in drm_fb_helper_restore_work_fn()
299 		mutex_unlock(&helper->lock);  in drm_fb_helper_restore_work_fn()
332  * @info: fbdev registered by the helper
367 	struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper,  in drm_fb_helper_resume_worker()  local
371 	fb_set_suspend(helper->fbdev, 0);  in drm_fb_helper_resume_worker()
451 	struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper,  in drm_fb_helper_damage_work()  local
453 	struct drm_device *dev = helper->dev;  in drm_fb_helper_damage_work()
454 	struct drm_clip_rect *clip = &helper->damage_clip;  in drm_fb_helper_damage_work()
459 	spin_lock_irqsave(&helper->damage_lock, flags);  in drm_fb_helper_damage_work()
463 	spin_unlock_irqrestore(&helper->damage_lock, flags);  in drm_fb_helper_damage_work()
469 	if (helper->buffer) {  in drm_fb_helper_damage_work()
470 		ret = drm_fb_helper_damage_blit(helper, &clip_copy);  in drm_fb_helper_damage_work()
475 	if (helper->fb->funcs->dirty) {  in drm_fb_helper_damage_work()
476 		ret = helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, &clip_copy, 1);  in drm_fb_helper_damage_work()
477 		if (drm_WARN_ONCE(dev, ret, "Dirty helper failed: ret=%d\n", ret))  in drm_fb_helper_damage_work()
488 	spin_lock_irqsave(&helper->damage_lock, flags);  in drm_fb_helper_damage_work()
493 	spin_unlock_irqrestore(&helper->damage_lock, flags);  in drm_fb_helper_damage_work()
499  * @helper: driver-allocated fbdev helper structure to set up
500  * @funcs: pointer to structure of functions associate with this helper
502  * Sets up the bare minimum to make the framebuffer helper usable. This is
505 void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper,  in drm_fb_helper_prepare()  argument
508 	INIT_LIST_HEAD(&helper->kernel_fb_list);  in drm_fb_helper_prepare()
509 	spin_lock_init(&helper->damage_lock);  in drm_fb_helper_prepare()
510 	INIT_WORK(&helper->resume_work, drm_fb_helper_resume_worker);  in drm_fb_helper_prepare()
511 	INIT_WORK(&helper->damage_work, drm_fb_helper_damage_work);  in drm_fb_helper_prepare()
512 	helper->damage_clip.x1 = helper->damage_clip.y1 = ~0;  in drm_fb_helper_prepare()
513 	mutex_init(&helper->lock);  in drm_fb_helper_prepare()
514 	helper->funcs = funcs;  in drm_fb_helper_prepare()
515 	helper->dev = dev;  in drm_fb_helper_prepare()
522  * @fb_helper: driver-allocated fbdev helper structure to initialize
524  * This allocates the structures for the fbdev helper with the given limits.
562  * @fb_helper: driver-allocated fbdev helper
564  * A helper to alloc fb_info and the members cmap and apertures. Called
589 	 * for each IORESOURCE_MEM resource helper->dev->dev has and also  in drm_fb_helper_alloc_fbi()
616  * @fb_helper: driver-allocated fbdev helper, can be NULL
631  * @fb_helper: driver-allocated fbdev helper, can be NULL
686 	struct drm_fb_helper *helper = info->par;  in drm_fb_helper_damage()  local
687 	struct drm_clip_rect *clip = &helper->damage_clip;  in drm_fb_helper_damage()
690 	if (!drm_fbdev_use_shadow_fb(helper))  in drm_fb_helper_damage()
693 	spin_lock_irqsave(&helper->damage_lock, flags);  in drm_fb_helper_damage()
698 	spin_unlock_irqrestore(&helper->damage_lock, flags);  in drm_fb_helper_damage()
700 	schedule_work(&helper->damage_work);  in drm_fb_helper_damage()
818  * @info: fbdev registered by the helper
833  * @info: fbdev registered by the helper
848  * @info: fbdev registered by the helper
863  * @info: fbdev registered by the helper
878  * @info: fbdev registered by the helper
893  * @info: fbdev registered by the helper
908  * @fb_helper: driver-allocated fbdev helper, can be NULL
925  * @fb_helper: driver-allocated fbdev helper, can be NULL
1174  * @info: fbdev registered by the helper
1211  * @info: fbdev registered by the helper
1215  * A helper to implement the standard fbdev ioctl. Only
1360  * @info: fbdev registered by the helper
1443  * @info: fbdev registered by the helper
1548  * @info: fbdev registered by the helper
1816  * @fb_helper: fb helper instance to use as template
1819  * Sets up the variable and fixed fbdev metainformation from the given fb helper
1991  * as a helper to setup simple default values for the fbdev info structure.
2034  * @fb_helper: driver-allocated fbdev helper, can be NULL
2087  * drm_fb_helper_lastclose - DRM driver lastclose helper for fbdev emulation
2101  *                                     helper for fbdev emulation