1 // SPDX-License-Identifier: GPL-2.0
12 #include <linux/dma-fence.h>
57  *	Write-only object property storing a DRM_MODE_OBJECT_FB: it stores the
65  *	Immutable blob property to store the supported pixel formats table. The
67  *	Userspace can use this blob to find out what pixel formats are supported
68  *	by the connector's writeback engine.
73  *	writeback is finished. The value should be the address of a 32-bit
80  *	out-fence for the commit and use it appropriately.
84 #define fence_to_wb_connector(x) container_of(x->lock, \
93 	return wb_connector->base.dev->driver->name;  in drm_writeback_fence_get_driver_name()
102 	return wb_connector->timeline_name;  in drm_writeback_fence_get_timeline_name()
114 	if (!dev->mode_config.writeback_fb_id_property) {  in create_writeback_properties()
119 			return -ENOMEM;  in create_writeback_properties()
120 		dev->mode_config.writeback_fb_id_property = prop;  in create_writeback_properties()
123 	if (!dev->mode_config.writeback_pixel_formats_property) {  in create_writeback_properties()
129 			return -ENOMEM;  in create_writeback_properties()
130 		dev->mode_config.writeback_pixel_formats_property = prop;  in create_writeback_properties()
133 	if (!dev->mode_config.writeback_out_fence_ptr_property) {  in create_writeback_properties()
138 			return -ENOMEM;  in create_writeback_properties()
139 		dev->mode_config.writeback_out_fence_ptr_property = prop;  in create_writeback_properties()
150  * drm_writeback_connector_init - Initialize a writeback connector and its properties
155  * @formats: Array of supported pixel formats for the writeback engine
159  * This function creates the writeback-connector-specific properties if they
180 	drm_encoder_helper_add(&wb_connector->encoder, enc_helper_funcs);  in drm_writeback_connector_init()
182 	wb_connector->encoder.possible_crtcs = possible_crtcs;  in drm_writeback_connector_init()
184 	ret = drm_encoder_init(dev, &wb_connector->encoder,  in drm_writeback_connector_init()
190 	ret = drm_writeback_connector_init_with_encoder(dev, wb_connector, &wb_connector->encoder,  in drm_writeback_connector_init()
194 		drm_encoder_cleanup(&wb_connector->encoder);  in drm_writeback_connector_init()
202 	if (dev->mode_config.writeback_pixel_formats_property) {  in delete_writeback_properties()
203 		drm_property_destroy(dev, dev->mode_config.writeback_pixel_formats_property);  in delete_writeback_properties()
204 		dev->mode_config.writeback_pixel_formats_property = NULL;  in delete_writeback_properties()
206 	if (dev->mode_config.writeback_out_fence_ptr_property) {  in delete_writeback_properties()
207 		drm_property_destroy(dev, dev->mode_config.writeback_out_fence_ptr_property);  in delete_writeback_properties()
208 		dev->mode_config.writeback_out_fence_ptr_property = NULL;  in delete_writeback_properties()
210 	if (dev->mode_config.writeback_fb_id_property) {  in delete_writeback_properties()
211 		drm_property_destroy(dev, dev->mode_config.writeback_fb_id_property);  in delete_writeback_properties()
212 		dev->mode_config.writeback_fb_id_property = NULL;  in delete_writeback_properties()
217  * __drm_writeback_connector_init - Initialize a writeback connector with
223  * @formats: Array of supported pixel formats for the writeback engine
226  * This function creates the writeback-connector-specific properties if they
245 	struct drm_connector *connector = &wb_connector->base;  in __drm_writeback_connector_init()
246 	struct drm_mode_config *config = &dev->mode_config;  in __drm_writeback_connector_init()
253 	connector->interlace_allowed = 0;  in __drm_writeback_connector_init()
266 	INIT_LIST_HEAD(&wb_connector->job_queue);  in __drm_writeback_connector_init()
267 	spin_lock_init(&wb_connector->job_lock);  in __drm_writeback_connector_init()
269 	wb_connector->fence_context = dma_fence_context_alloc(1);  in __drm_writeback_connector_init()
270 	spin_lock_init(&wb_connector->fence_lock);  in __drm_writeback_connector_init()
271 	snprintf(wb_connector->timeline_name,  in __drm_writeback_connector_init()
272 		 sizeof(wb_connector->timeline_name),  in __drm_writeback_connector_init()
273 		 "CONNECTOR:%d-%s", connector->base.id, connector->name);  in __drm_writeback_connector_init()
275 	drm_object_attach_property(&connector->base,  in __drm_writeback_connector_init()
276 				   config->writeback_out_fence_ptr_property, 0);  in __drm_writeback_connector_init()
278 	drm_object_attach_property(&connector->base,  in __drm_writeback_connector_init()
279 				   config->writeback_fb_id_property, 0);  in __drm_writeback_connector_init()
281 	drm_object_attach_property(&connector->base,  in __drm_writeback_connector_init()
282 				   config->writeback_pixel_formats_property,  in __drm_writeback_connector_init()
283 				   blob->base.id);  in __drm_writeback_connector_init()
284 	wb_connector->pixel_formats_blob_ptr = blob;  in __drm_writeback_connector_init()
293  * drm_writeback_connector_init_with_encoder - Initialize a writeback connector with
300  * @formats: Array of supported pixel formats for the writeback engine
303  * This function creates the writeback-connector-specific properties if they
327 	struct drm_connector *connector = &wb_connector->base;  in drm_writeback_connector_init_with_encoder()
345  * drm_writeback_connector_cleanup - Cleanup the writeback connector
361 	drm_property_blob_put(wb_connector->pixel_formats_blob_ptr);  in drm_writeback_connector_cleanup()
363 	spin_lock_irqsave(&wb_connector->job_lock, flags);  in drm_writeback_connector_cleanup()
364 	list_for_each_entry_safe(pos, n, &wb_connector->job_queue, list_entry) {  in drm_writeback_connector_cleanup()
365 		list_del(&pos->list_entry);  in drm_writeback_connector_cleanup()
368 	spin_unlock_irqrestore(&wb_connector->job_lock, flags);  in drm_writeback_connector_cleanup()
372  * drmm_writeback_connector_init - Initialize a writeback connector with
379  * @formats: Array of supported pixel formats for the writeback engine
384  * This function creates the writeback-connector-specific properties if they
397 	struct drm_connector *connector = &wb_connector->base;  in drmm_writeback_connector_init()
422 	WARN_ON(conn_state->connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK);  in drm_writeback_set_fb()
424 	if (!conn_state->writeback_job) {  in drm_writeback_set_fb()
425 		conn_state->writeback_job =  in drm_writeback_set_fb()
426 			kzalloc(sizeof(*conn_state->writeback_job), GFP_KERNEL);  in drm_writeback_set_fb()
427 		if (!conn_state->writeback_job)  in drm_writeback_set_fb()
428 			return -ENOMEM;  in drm_writeback_set_fb()
430 		conn_state->writeback_job->connector =  in drm_writeback_set_fb()
431 			drm_connector_to_writeback(conn_state->connector);  in drm_writeback_set_fb()
434 	drm_framebuffer_assign(&conn_state->writeback_job->fb, fb);  in drm_writeback_set_fb()
440 	struct drm_writeback_connector *connector = job->connector;  in drm_writeback_prepare_job()
442 		connector->base.helper_private;  in drm_writeback_prepare_job()
445 	if (funcs->prepare_writeback_job) {  in drm_writeback_prepare_job()
446 		ret = funcs->prepare_writeback_job(connector, job);  in drm_writeback_prepare_job()
451 	job->prepared = true;  in drm_writeback_prepare_job()
457  * drm_writeback_queue_job - Queue a writeback job for later signalling
463  * @conn_state->writeback_job to NULL, and so no access to the job may be
481 	job = conn_state->writeback_job;  in drm_writeback_queue_job()
482 	conn_state->writeback_job = NULL;  in drm_writeback_queue_job()
484 	spin_lock_irqsave(&wb_connector->job_lock, flags);  in drm_writeback_queue_job()
485 	list_add_tail(&job->list_entry, &wb_connector->job_queue);  in drm_writeback_queue_job()
486 	spin_unlock_irqrestore(&wb_connector->job_lock, flags);  in drm_writeback_queue_job()
492 	struct drm_writeback_connector *connector = job->connector;  in drm_writeback_cleanup_job()
494 		connector->base.helper_private;  in drm_writeback_cleanup_job()
496 	if (job->prepared && funcs->cleanup_writeback_job)  in drm_writeback_cleanup_job()
497 		funcs->cleanup_writeback_job(connector, job);  in drm_writeback_cleanup_job()
499 	if (job->fb)  in drm_writeback_cleanup_job()
500 		drm_framebuffer_put(job->fb);  in drm_writeback_cleanup_job()
502 	if (job->out_fence)  in drm_writeback_cleanup_job()
503 		dma_fence_put(job->out_fence);  in drm_writeback_cleanup_job()
526  * drm_writeback_signal_completion - Signal the completion of a writeback job
549 	spin_lock_irqsave(&wb_connector->job_lock, flags);  in drm_writeback_signal_completion()
550 	job = list_first_entry_or_null(&wb_connector->job_queue,  in drm_writeback_signal_completion()
554 		list_del(&job->list_entry);  in drm_writeback_signal_completion()
556 	spin_unlock_irqrestore(&wb_connector->job_lock, flags);  in drm_writeback_signal_completion()
561 	out_fence = job->out_fence;  in drm_writeback_signal_completion()
567 		job->out_fence = NULL;  in drm_writeback_signal_completion()
570 	INIT_WORK(&job->cleanup_work, cleanup_work);  in drm_writeback_signal_completion()
571 	queue_work(system_long_wq, &job->cleanup_work);  in drm_writeback_signal_completion()
580 	if (WARN_ON(wb_connector->base.connector_type !=  in drm_writeback_get_out_fence()
589 		       &wb_connector->fence_lock, wb_connector->fence_context,  in drm_writeback_get_out_fence()
590 		       ++wb_connector->fence_seqno);  in drm_writeback_get_out_fence()