1 // SPDX-License-Identifier: GPL-2.0
12 #include <linux/dma-fence.h>
55  *	Write-only object property storing a DRM_MODE_OBJECT_FB: it stores the
63  *	Immutable blob property to store the supported pixel formats table. The
64  *	data is an array of u32 DRM_FORMAT_* fourcc values.
65  *	Userspace can use this blob to find out what pixel formats are supported
71  *	writeback is finished. The value should be the address of a 32-bit
78  *	out-fence for the commit and use it appropriately.
82 #define fence_to_wb_connector(x) container_of(x->lock, \
91 	return wb_connector->base.dev->driver->name;  in drm_writeback_fence_get_driver_name()
100 	return wb_connector->timeline_name;  in drm_writeback_fence_get_timeline_name()
112 	if (!dev->mode_config.writeback_fb_id_property) {  in create_writeback_properties()
117 			return -ENOMEM;  in create_writeback_properties()
118 		dev->mode_config.writeback_fb_id_property = prop;  in create_writeback_properties()
121 	if (!dev->mode_config.writeback_pixel_formats_property) {  in create_writeback_properties()
127 			return -ENOMEM;  in create_writeback_properties()
128 		dev->mode_config.writeback_pixel_formats_property = prop;  in create_writeback_properties()
131 	if (!dev->mode_config.writeback_out_fence_ptr_property) {  in create_writeback_properties()
136 			return -ENOMEM;  in create_writeback_properties()
137 		dev->mode_config.writeback_out_fence_ptr_property = prop;  in create_writeback_properties()
148  * drm_writeback_connector_init - Initialize a writeback connector and its properties
153  * @formats: Array of supported pixel formats for the writeback engine
154  * @n_formats: Length of the formats array
157  * This function creates the writeback-connector-specific properties if they
178 	drm_encoder_helper_add(&wb_connector->encoder, enc_helper_funcs);  in drm_writeback_connector_init()
180 	wb_connector->encoder.possible_crtcs = possible_crtcs;  in drm_writeback_connector_init()
182 	ret = drm_encoder_init(dev, &wb_connector->encoder,  in drm_writeback_connector_init()
188 	ret = drm_writeback_connector_init_with_encoder(dev, wb_connector, &wb_connector->encoder,  in drm_writeback_connector_init()
192 		drm_encoder_cleanup(&wb_connector->encoder);  in drm_writeback_connector_init()
199  * drm_writeback_connector_init_with_encoder - Initialize a writeback connector with
206  * @formats: Array of supported pixel formats for the writeback engine
207  * @n_formats: Length of the formats array
209  * This function creates the writeback-connector-specific properties if they
233 	struct drm_connector *connector = &wb_connector->base;  in drm_writeback_connector_init_with_encoder()
234 	struct drm_mode_config *config = &dev->mode_config;  in drm_writeback_connector_init_with_encoder()
246 	connector->interlace_allowed = 0;  in drm_writeback_connector_init_with_encoder()
257 	INIT_LIST_HEAD(&wb_connector->job_queue);  in drm_writeback_connector_init_with_encoder()
258 	spin_lock_init(&wb_connector->job_lock);  in drm_writeback_connector_init_with_encoder()
260 	wb_connector->fence_context = dma_fence_context_alloc(1);  in drm_writeback_connector_init_with_encoder()
261 	spin_lock_init(&wb_connector->fence_lock);  in drm_writeback_connector_init_with_encoder()
262 	snprintf(wb_connector->timeline_name,  in drm_writeback_connector_init_with_encoder()
263 		 sizeof(wb_connector->timeline_name),  in drm_writeback_connector_init_with_encoder()
264 		 "CONNECTOR:%d-%s", connector->base.id, connector->name);  in drm_writeback_connector_init_with_encoder()
266 	drm_object_attach_property(&connector->base,  in drm_writeback_connector_init_with_encoder()
267 				   config->writeback_out_fence_ptr_property, 0);  in drm_writeback_connector_init_with_encoder()
269 	drm_object_attach_property(&connector->base,  in drm_writeback_connector_init_with_encoder()
270 				   config->writeback_fb_id_property, 0);  in drm_writeback_connector_init_with_encoder()
272 	drm_object_attach_property(&connector->base,  in drm_writeback_connector_init_with_encoder()
273 				   config->writeback_pixel_formats_property,  in drm_writeback_connector_init_with_encoder()
274 				   blob->base.id);  in drm_writeback_connector_init_with_encoder()
275 	wb_connector->pixel_formats_blob_ptr = blob;  in drm_writeback_connector_init_with_encoder()
290 	WARN_ON(conn_state->connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK);  in drm_writeback_set_fb()
292 	if (!conn_state->writeback_job) {  in drm_writeback_set_fb()
293 		conn_state->writeback_job =  in drm_writeback_set_fb()
294 			kzalloc(sizeof(*conn_state->writeback_job), GFP_KERNEL);  in drm_writeback_set_fb()
295 		if (!conn_state->writeback_job)  in drm_writeback_set_fb()
296 			return -ENOMEM;  in drm_writeback_set_fb()
298 		conn_state->writeback_job->connector =  in drm_writeback_set_fb()
299 			drm_connector_to_writeback(conn_state->connector);  in drm_writeback_set_fb()
302 	drm_framebuffer_assign(&conn_state->writeback_job->fb, fb);  in drm_writeback_set_fb()
308 	struct drm_writeback_connector *connector = job->connector;  in drm_writeback_prepare_job()
310 		connector->base.helper_private;  in drm_writeback_prepare_job()
313 	if (funcs->prepare_writeback_job) {  in drm_writeback_prepare_job()
314 		ret = funcs->prepare_writeback_job(connector, job);  in drm_writeback_prepare_job()
319 	job->prepared = true;  in drm_writeback_prepare_job()
325  * drm_writeback_queue_job - Queue a writeback job for later signalling
331  * @conn_state->writeback_job to NULL, and so no access to the job may be
349 	job = conn_state->writeback_job;  in drm_writeback_queue_job()
350 	conn_state->writeback_job = NULL;  in drm_writeback_queue_job()
352 	spin_lock_irqsave(&wb_connector->job_lock, flags);  in drm_writeback_queue_job()
353 	list_add_tail(&job->list_entry, &wb_connector->job_queue);  in drm_writeback_queue_job()
354 	spin_unlock_irqrestore(&wb_connector->job_lock, flags);  in drm_writeback_queue_job()
360 	struct drm_writeback_connector *connector = job->connector;  in drm_writeback_cleanup_job()
362 		connector->base.helper_private;  in drm_writeback_cleanup_job()
364 	if (job->prepared && funcs->cleanup_writeback_job)  in drm_writeback_cleanup_job()
365 		funcs->cleanup_writeback_job(connector, job);  in drm_writeback_cleanup_job()
367 	if (job->fb)  in drm_writeback_cleanup_job()
368 		drm_framebuffer_put(job->fb);  in drm_writeback_cleanup_job()
370 	if (job->out_fence)  in drm_writeback_cleanup_job()
371 		dma_fence_put(job->out_fence);  in drm_writeback_cleanup_job()
394  * drm_writeback_signal_completion - Signal the completion of a writeback job
417 	spin_lock_irqsave(&wb_connector->job_lock, flags);  in drm_writeback_signal_completion()
418 	job = list_first_entry_or_null(&wb_connector->job_queue,  in drm_writeback_signal_completion()
422 		list_del(&job->list_entry);  in drm_writeback_signal_completion()
424 	spin_unlock_irqrestore(&wb_connector->job_lock, flags);  in drm_writeback_signal_completion()
429 	out_fence = job->out_fence;  in drm_writeback_signal_completion()
435 		job->out_fence = NULL;  in drm_writeback_signal_completion()
438 	INIT_WORK(&job->cleanup_work, cleanup_work);  in drm_writeback_signal_completion()
439 	queue_work(system_long_wq, &job->cleanup_work);  in drm_writeback_signal_completion()
448 	if (WARN_ON(wb_connector->base.connector_type !=  in drm_writeback_get_out_fence()
457 		       &wb_connector->fence_lock, wb_connector->fence_context,  in drm_writeback_get_out_fence()
458 		       ++wb_connector->fence_seqno);  in drm_writeback_get_out_fence()