gpu/drm/drm_fb_helper.c

6  * DRM framebuffer helper functions
85  * The fb helper functions are useful to provide an fbdev on top of a drm kernel
87  * helper functions used by many drivers to implement the kernel mode setting
97  * They should also notify the fb helper code from updates to the output
106  * All other functions exported by the fb helper library can be used to
111  * helper must be called first to initialize the minimum required to make
116  * encoders and connectors. To finish up the fbdev helper initialization, the
151  * @info: fbdev registered by the helper
155 	struct drm_fb_helper *helper = info->par;
159 	list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
160 		mutex_lock(&helper->client.modeset_mutex);
161 		drm_client_for_each_modeset(mode_set, &helper->client) {
178 		mutex_unlock(&helper->client.modeset_mutex);
187  * @info: fbdev registered by the helper
191 	struct drm_fb_helper *helper = info->par;
192 	struct drm_client_dev *client = &helper->client;
193 	struct drm_device *dev = helper->dev;
267  * @fb_helper: driver-allocated fbdev helper, can be NULL
270  * when implementing an fbcon on top of kms using this helper. This ensures that
286 	struct drm_fb_helper *helper;
289 	list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
290 		struct drm_device *dev = helper->dev;
295 		mutex_lock(&helper->lock);
296 		drm_client_modeset_commit_locked(&helper->client);
297 		mutex_unlock(&helper->lock);
330  * @info: fbdev registered by the helper
365 	struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper,
369 	fb_set_suspend(helper->info, 0);
373 static void drm_fb_helper_fb_dirty(struct drm_fb_helper *helper)
375 	struct drm_device *dev = helper->dev;
376 	struct drm_clip_rect *clip = &helper->damage_clip;
381 	if (drm_WARN_ON_ONCE(dev, !helper->funcs->fb_dirty))
384 	spin_lock_irqsave(&helper->damage_lock, flags);
388 	spin_unlock_irqrestore(&helper->damage_lock, flags);
390 	ret = helper->funcs->fb_dirty(helper, &clip_copy);
401 	spin_lock_irqsave(&helper->damage_lock, flags);
406 	spin_unlock_irqrestore(&helper->damage_lock, flags);
411 	struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, damage_work);
413 	drm_fb_helper_fb_dirty(helper);
419  * @helper: driver-allocated fbdev helper structure to set up
421  * @funcs: pointer to structure of functions associate with this helper
423  * Sets up the bare minimum to make the framebuffer helper usable. This is
426 void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper,
444 	INIT_LIST_HEAD(&helper->kernel_fb_list);
445 	spin_lock_init(&helper->damage_lock);
446 	INIT_WORK(&helper->resume_work, drm_fb_helper_resume_worker);
447 	INIT_WORK(&helper->damage_work, drm_fb_helper_damage_work);
448 	helper->damage_clip.x1 = helper->damage_clip.y1 = ~0;
449 	mutex_init(&helper->lock);
450 	helper->funcs = funcs;
451 	helper->dev = dev;
452 	helper->preferred_bpp = preferred_bpp;
458  * @fb_helper: driver-allocated fbdev helper structure to set up
460  * Cleans up the framebuffer helper. Inverse of drm_fb_helper_prepare().
471  * @fb_helper: driver-allocated fbdev helper structure to initialize
473  * This allocates the structures for the fbdev helper with the given limits.
506  * @fb_helper: driver-allocated fbdev helper
508  * A helper to alloc fb_info and the member cmap. Called by the driver
544  * @fb_helper: driver-allocated fbdev helper
546  * A helper to release fb_info and the member cmap.  Drivers do not
567  * @fb_helper: driver-allocated fbdev helper, can be NULL
582  * @fb_helper: driver-allocated fbdev helper, can be NULL
614 static void drm_fb_helper_add_damage_clip(struct drm_fb_helper *helper, u32 x, u32 y,
617 	struct drm_clip_rect *clip = &helper->damage_clip;
620 	spin_lock_irqsave(&helper->damage_lock, flags);
625 	spin_unlock_irqrestore(&helper->damage_lock, flags);
628 static void drm_fb_helper_damage(struct drm_fb_helper *helper, u32 x, u32 y,
631 	drm_fb_helper_add_damage_clip(helper, x, y, width, height);
633 	schedule_work(&helper->damage_work);
705 	struct drm_fb_helper *helper = info->par;
732 		drm_fb_helper_damage(helper, damage_area.x1, damage_area.y1,
741  * @fb_helper: driver-allocated fbdev helper, can be NULL
758  * @fb_helper: driver-allocated fbdev helper, can be NULL
1007  * @info: fbdev registered by the helper
1044  * @info: fbdev registered by the helper
1048  * A helper to implement the standard fbdev ioctl. Only
1216  * @info: fbdev registered by the helper
1311  * @info: fbdev registered by the helper
1411  * @info: fbdev registered by the helper
1733  * @fb_helper: fb helper instance to use as template
1736  * Sets up the variable and fixed fbdev metainformation from the given fb helper
1902  * as a helper to setup simple default values for the fbdev info structure.
1945  * @fb_helper: driver-allocated fbdev helper, can be NULL
1997  * drm_fb_helper_lastclose - DRM driver lastclose helper for fbdev emulation
2011  *                                     helper for fbdev emulation