1 // SPDX-License-Identifier: MIT
24  * intel_dp_tunnel_disconnect - Disconnect a DP tunnel from a port
25  * @intel_dp: DP port object the tunnel is connected to
27  * Disconnect a DP tunnel from @intel_dp, destroying any related state. This
28  * should be called after detecting a sink-disconnect event from the port.
32 	drm_dp_tunnel_destroy(intel_dp->tunnel);  in intel_dp_tunnel_disconnect()
33 	intel_dp->tunnel = NULL;  in intel_dp_tunnel_disconnect()
37  * intel_dp_tunnel_destroy - Destroy a DP tunnel
38  * @intel_dp: DP port object the tunnel is connected to
40  * Destroy a DP tunnel connected to @intel_dp, after disabling the BW
47 		drm_dp_tunnel_disable_bw_alloc(intel_dp->tunnel);  in intel_dp_tunnel_destroy()
73 	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;  in update_tunnel_state()
82 	ret = drm_dp_tunnel_update_state(intel_dp->tunnel);  in update_tunnel_state()
84 		drm_dbg_kms(display->drm,  in update_tunnel_state()
86 			    drm_dp_tunnel_name(intel_dp->tunnel),  in update_tunnel_state()
87 			    encoder->base.base.id, encoder->base.name,  in update_tunnel_state()
94 	    !drm_dp_tunnel_bw_alloc_is_enabled(intel_dp->tunnel))  in update_tunnel_state()
106 	drm_dbg_kms(display->drm,  in update_tunnel_state()
107 		    "[DPTUN %s][ENCODER:%d:%s] Notify users about BW change: %d -> %d\n",  in update_tunnel_state()
108 		    drm_dp_tunnel_name(intel_dp->tunnel),  in update_tunnel_state()
109 		    encoder->base.base.id, encoder->base.name,  in update_tunnel_state()
116  * Allocate the BW for a tunnel on a DP connector/port if the connector/port
125 	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;  in allocate_initial_tunnel_bw_for_pipes()
130 	for_each_intel_crtc_in_pipe_mask(display->drm, crtc, pipe_mask) {  in allocate_initial_tunnel_bw_for_pipes()
132 			to_intel_crtc_state(crtc->base.state);  in allocate_initial_tunnel_bw_for_pipes()
137 		drm_dbg_kms(display->drm,  in allocate_initial_tunnel_bw_for_pipes()
139 			    drm_dp_tunnel_name(intel_dp->tunnel),  in allocate_initial_tunnel_bw_for_pipes()
140 			    encoder->base.base.id, encoder->base.name,  in allocate_initial_tunnel_bw_for_pipes()
141 			    crtc->base.base.id, crtc->base.name,  in allocate_initial_tunnel_bw_for_pipes()
142 			    crtc->pipe,  in allocate_initial_tunnel_bw_for_pipes()
146 	err = drm_dp_tunnel_alloc_bw(intel_dp->tunnel, tunnel_bw);  in allocate_initial_tunnel_bw_for_pipes()
148 		drm_dbg_kms(display->drm,  in allocate_initial_tunnel_bw_for_pipes()
150 			    drm_dp_tunnel_name(intel_dp->tunnel),  in allocate_initial_tunnel_bw_for_pipes()
151 			    encoder->base.base.id, encoder->base.name,  in allocate_initial_tunnel_bw_for_pipes()
176 	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;  in detect_new_tunnel()
180 	tunnel = drm_dp_tunnel_detect(display->dp_tunnel_mgr,  in detect_new_tunnel()
181 				      &intel_dp->aux);  in detect_new_tunnel()
185 	intel_dp->tunnel = tunnel;  in detect_new_tunnel()
187 	ret = drm_dp_tunnel_enable_bw_alloc(intel_dp->tunnel);  in detect_new_tunnel()
189 		if (ret == -EOPNOTSUPP)  in detect_new_tunnel()
192 		drm_dbg_kms(display->drm,  in detect_new_tunnel()
194 			    drm_dp_tunnel_name(intel_dp->tunnel),  in detect_new_tunnel()
195 			    encoder->base.base.id, encoder->base.name,  in detect_new_tunnel()
210  * intel_dp_tunnel_detect - Detect a DP tunnel on a port
211  * @intel_dp: DP port object
212  * @ctx: lock context acquired by the connector detection handler
214  * Detect a DP tunnel on the @intel_dp port, enabling the BW allocation mode
221  * tunnel. If the tunnel's state change requires this - for instance the
222  * tunnel's group ID has changed - the tunnel will be dropped and recreated.
224  * Return 0 in case of success - after any tunnel detected and added to
225  * @intel_dp - 1 in case the BW on an already existing tunnel has changed in a
235 	if (intel_dp->tunnel) {  in intel_dp_tunnel_detect()
248  * intel_dp_tunnel_bw_alloc_is_enabled - Query the BW allocation support on a tunnel
249  * @intel_dp: DP port object
251  * Query whether a DP tunnel is connected on @intel_dp and the tunnel supports
258 	return drm_dp_tunnel_bw_alloc_is_enabled(intel_dp->tunnel);  in intel_dp_tunnel_bw_alloc_is_enabled()
262  * intel_dp_tunnel_suspend - Suspend a DP tunnel connected on a port
263  * @intel_dp: DP port object
265  * Suspend a DP tunnel on @intel_dp with BW allocation mode enabled on it.
270 	struct intel_connector *connector = intel_dp->attached_connector;  in intel_dp_tunnel_suspend()  local
271 	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;  in intel_dp_tunnel_suspend()
276 	drm_dbg_kms(display->drm,  in intel_dp_tunnel_suspend()
277 		    "[DPTUN %s][CONNECTOR:%d:%s][ENCODER:%d:%s] Suspend\n",  in intel_dp_tunnel_suspend()
278 		    drm_dp_tunnel_name(intel_dp->tunnel),  in intel_dp_tunnel_suspend()
279 		    connector->base.base.id, connector->base.name,  in intel_dp_tunnel_suspend()
280 		    encoder->base.base.id, encoder->base.name);  in intel_dp_tunnel_suspend()
282 	drm_dp_tunnel_disable_bw_alloc(intel_dp->tunnel);  in intel_dp_tunnel_suspend()
284 	intel_dp->tunnel_suspended = true;  in intel_dp_tunnel_suspend()
288  * intel_dp_tunnel_resume - Resume a DP tunnel connected on a port
289  * @intel_dp: DP port object
293  * Resume a DP tunnel on @intel_dp with BW allocation mode enabled on it.
300 	struct intel_connector *connector = intel_dp->attached_connector;  in intel_dp_tunnel_resume()  local
301 	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;  in intel_dp_tunnel_resume()
306 	if (!intel_dp->tunnel_suspended)  in intel_dp_tunnel_resume()
309 	intel_dp->tunnel_suspended = false;  in intel_dp_tunnel_resume()
311 	drm_dbg_kms(display->drm,  in intel_dp_tunnel_resume()
312 		    "[DPTUN %s][CONNECTOR:%d:%s][ENCODER:%d:%s] Resume\n",  in intel_dp_tunnel_resume()
313 		    drm_dp_tunnel_name(intel_dp->tunnel),  in intel_dp_tunnel_resume()
314 		    connector->base.base.id, connector->base.name,  in intel_dp_tunnel_resume()
315 		    encoder->base.base.id, encoder->base.name);  in intel_dp_tunnel_resume()
328 			drm_dp_tunnel_set_io_error(intel_dp->tunnel);  in intel_dp_tunnel_resume()
333 	err = drm_dp_tunnel_enable_bw_alloc(intel_dp->tunnel);  in intel_dp_tunnel_resume()
339 		struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);  in intel_dp_tunnel_resume()
342 		pipe_mask |= BIT(crtc->pipe);  in intel_dp_tunnel_resume()
352 	drm_dbg_kms(display->drm,  in intel_dp_tunnel_resume()
353 …"[DPTUN %s][CONNECTOR:%d:%s][ENCODER:%d:%s] Tunnel can't be resumed, will drop and reject it (err …  in intel_dp_tunnel_resume()
354 		    drm_dp_tunnel_name(intel_dp->tunnel),  in intel_dp_tunnel_resume()
355 		    connector->base.base.id, connector->base.name,  in intel_dp_tunnel_resume()
356 		    encoder->base.base.id, encoder->base.name,  in intel_dp_tunnel_resume()
363 	if (!state->inherited_dp_tunnels)  in get_inherited_tunnel()
366 	return state->inherited_dp_tunnels->ref[crtc->pipe].tunnel;  in get_inherited_tunnel()
379 		drm_WARN_ON(display->drm, old_tunnel != tunnel);  in add_inherited_tunnel()
383 	if (!state->inherited_dp_tunnels) {  in add_inherited_tunnel()
384 		state->inherited_dp_tunnels = kzalloc(sizeof(*state->inherited_dp_tunnels),  in add_inherited_tunnel()
386 		if (!state->inherited_dp_tunnels)  in add_inherited_tunnel()
387 			return -ENOMEM;  in add_inherited_tunnel()
390 	drm_dp_tunnel_ref_get(tunnel, &state->inherited_dp_tunnels->ref[crtc->pipe]);  in add_inherited_tunnel()
400 	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;  in check_inherited_tunnel_state()
401 	struct intel_connector *connector =  in check_inherited_tunnel_state()  local
402 		to_intel_connector(old_conn_state->base.connector);  in check_inherited_tunnel_state()
408 	 * connector got enabled already without a BWA tunnel, or a different  in check_inherited_tunnel_state()
417 	if (!old_conn_state->base.crtc)  in check_inherited_tunnel_state()
420 	old_crtc = to_intel_crtc(old_conn_state->base.crtc);  in check_inherited_tunnel_state()
423 	if (!old_crtc_state->hw.active ||  in check_inherited_tunnel_state()
424 	    old_crtc_state->dp_tunnel_ref.tunnel == intel_dp->tunnel)  in check_inherited_tunnel_state()
427 	drm_dbg_kms(display->drm,  in check_inherited_tunnel_state()
428 …   "[DPTUN %s][CONNECTOR:%d:%s][ENCODER:%d:%s][CRTC:%d:%s] Adding state for inherited tunnel %p\n",  in check_inherited_tunnel_state()
429 		    drm_dp_tunnel_name(intel_dp->tunnel),  in check_inherited_tunnel_state()
430 		    connector->base.base.id, connector->base.name,  in check_inherited_tunnel_state()
431 		    encoder->base.base.id, encoder->base.name,  in check_inherited_tunnel_state()
432 		    old_crtc->base.base.id, old_crtc->base.name,  in check_inherited_tunnel_state()
433 		    intel_dp->tunnel);  in check_inherited_tunnel_state()
435 	return add_inherited_tunnel(state, intel_dp->tunnel, old_crtc);  in check_inherited_tunnel_state()
439  * intel_dp_tunnel_atomic_cleanup_inherited_state - Free any inherited DP tunnel state
442  * Free the inherited DP tunnel state in @state.
449 	if (!state->inherited_dp_tunnels)  in intel_dp_tunnel_atomic_cleanup_inherited_state()
453 		if (state->inherited_dp_tunnels->ref[pipe].tunnel)  in intel_dp_tunnel_atomic_cleanup_inherited_state()
454 			drm_dp_tunnel_ref_put(&state->inherited_dp_tunnels->ref[pipe]);  in intel_dp_tunnel_atomic_cleanup_inherited_state()
456 	kfree(state->inherited_dp_tunnels);  in intel_dp_tunnel_atomic_cleanup_inherited_state()
457 	state->inherited_dp_tunnels = NULL;  in intel_dp_tunnel_atomic_cleanup_inherited_state()
467 	err = drm_dp_tunnel_atomic_get_group_streams_in_state(&state->base,  in intel_dp_tunnel_atomic_add_group_state()
472 	drm_WARN_ON(display->drm, pipe_mask & ~((1 << I915_MAX_PIPES) - 1));  in intel_dp_tunnel_atomic_add_group_state()
478  * intel_dp_tunnel_atomic_add_state_for_crtc - Add CRTC specific DP tunnel state
482  * Add the DP tunnel state for @crtc if the CRTC (aka DP tunnel stream) is enabled
483  * via a DP tunnel.
493 	struct drm_dp_tunnel *tunnel = new_crtc_state->dp_tunnel_ref.tunnel;  in intel_dp_tunnel_atomic_add_state_for_crtc()
498 	tunnel_state = drm_dp_tunnel_atomic_get_state(&state->base, tunnel);  in intel_dp_tunnel_atomic_add_state_for_crtc()
507 			     struct intel_connector *connector,  in check_group_state()  argument
511 	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;  in check_group_state()
515 	if (!crtc_state->dp_tunnel_ref.tunnel)  in check_group_state()
518 	drm_dbg_kms(display->drm,  in check_group_state()
519 		    "[DPTUN %s][CONNECTOR:%d:%s][ENCODER:%d:%s][CRTC:%d:%s] Adding group state for tunnel %p\n",  in check_group_state()
520 		    drm_dp_tunnel_name(intel_dp->tunnel),  in check_group_state()
521 		    connector->base.base.id, connector->base.name,  in check_group_state()
522 		    encoder->base.base.id, encoder->base.name,  in check_group_state()
523 		    crtc->base.base.id, crtc->base.name,  in check_group_state()
524 		    crtc_state->dp_tunnel_ref.tunnel);  in check_group_state()
526 	return intel_dp_tunnel_atomic_add_group_state(state, crtc_state->dp_tunnel_ref.tunnel);  in check_group_state()
530  * intel_dp_tunnel_atomic_check_state - Check a connector's DP tunnel specific state
532  * @intel_dp: DP port object
533  * @connector: connector using @intel_dp
535  * Check and add the DP tunnel atomic state for @intel_dp/@connector to
536  * @state, if there is a DP tunnel detected on @intel_dp with BW allocation
537  * mode enabled on it, or if @intel_dp/@connector was previously enabled via a
538  * DP tunnel.
544 				       struct intel_connector *connector)  in intel_dp_tunnel_atomic_check_state()  argument
547 		intel_atomic_get_old_connector_state(state, connector);  in intel_dp_tunnel_atomic_check_state()
549 		intel_atomic_get_new_connector_state(state, connector);  in intel_dp_tunnel_atomic_check_state()
552 	if (old_conn_state->base.crtc) {  in intel_dp_tunnel_atomic_check_state()
553 		err = check_group_state(state, intel_dp, connector,  in intel_dp_tunnel_atomic_check_state()
554 					to_intel_crtc(old_conn_state->base.crtc));  in intel_dp_tunnel_atomic_check_state()
559 	if (new_conn_state->base.crtc &&  in intel_dp_tunnel_atomic_check_state()
560 	    new_conn_state->base.crtc != old_conn_state->base.crtc) {  in intel_dp_tunnel_atomic_check_state()
561 		err = check_group_state(state, intel_dp, connector,  in intel_dp_tunnel_atomic_check_state()
562 					to_intel_crtc(new_conn_state->base.crtc));  in intel_dp_tunnel_atomic_check_state()
571  * intel_dp_tunnel_atomic_compute_stream_bw - Compute the BW required by a DP tunnel stream
573  * @intel_dp: DP object
574  * @connector: connector using @intel_dp
575  * @crtc_state: state of CRTC of the given DP tunnel stream
577  * Compute the required BW of CRTC (aka DP tunnel stream), storing this BW to
578  * the DP tunnel state containing the stream in @state. Before re-calculating a
586 					     const struct intel_connector *connector,  in intel_dp_tunnel_atomic_compute_stream_bw()  argument
590 	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;  in intel_dp_tunnel_atomic_compute_stream_bw()
591 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);  in intel_dp_tunnel_atomic_compute_stream_bw()
598 	drm_dbg_kms(display->drm,  in intel_dp_tunnel_atomic_compute_stream_bw()
599 		    "[DPTUN %s][CONNECTOR:%d:%s][ENCODER:%d:%s][CRTC:%d:%s] Stream %d required BW %d Mb/s\n",  in intel_dp_tunnel_atomic_compute_stream_bw()
600 		    drm_dp_tunnel_name(intel_dp->tunnel),  in intel_dp_tunnel_atomic_compute_stream_bw()
601 		    connector->base.base.id, connector->base.name,  in intel_dp_tunnel_atomic_compute_stream_bw()
602 		    encoder->base.base.id, encoder->base.name,  in intel_dp_tunnel_atomic_compute_stream_bw()
603 		    crtc->base.base.id, crtc->base.name,  in intel_dp_tunnel_atomic_compute_stream_bw()
604 		    crtc->pipe,  in intel_dp_tunnel_atomic_compute_stream_bw()
607 	ret = drm_dp_tunnel_atomic_set_stream_bw(&state->base, intel_dp->tunnel,  in intel_dp_tunnel_atomic_compute_stream_bw()
608 						 crtc->pipe, required_rate);  in intel_dp_tunnel_atomic_compute_stream_bw()
612 	drm_dp_tunnel_ref_get(intel_dp->tunnel,  in intel_dp_tunnel_atomic_compute_stream_bw()
613 			      &crtc_state->dp_tunnel_ref);  in intel_dp_tunnel_atomic_compute_stream_bw()
619  * intel_dp_tunnel_atomic_clear_stream_bw - Clear any DP tunnel stream BW requirement
621  * @crtc_state: state of CRTC of the given DP tunnel stream
623  * Clear any DP tunnel stream BW requirement set by
629 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);  in intel_dp_tunnel_atomic_clear_stream_bw()
631 	if (!crtc_state->dp_tunnel_ref.tunnel)  in intel_dp_tunnel_atomic_clear_stream_bw()
634 	drm_dp_tunnel_atomic_set_stream_bw(&state->base,  in intel_dp_tunnel_atomic_clear_stream_bw()
635 					   crtc_state->dp_tunnel_ref.tunnel,  in intel_dp_tunnel_atomic_clear_stream_bw()
636 					   crtc->pipe, 0);  in intel_dp_tunnel_atomic_clear_stream_bw()
637 	drm_dp_tunnel_ref_put(&crtc_state->dp_tunnel_ref);  in intel_dp_tunnel_atomic_clear_stream_bw()
641  * intel_dp_tunnel_atomic_check_link - Check the DP tunnel atomic state
645  * Check the link configuration for all DP tunnels in @state. If the
651  *   - 0 if the configuration is valid
652  *   - %-EAGAIN, if the configuration is invalid and @limits got updated
655  *   - Other negative error, if the configuration is invalid without a
664 	err = drm_dp_tunnel_atomic_check_stream_bws(&state->base,  in intel_dp_tunnel_atomic_check_link()
666 	if (err != -ENOSPC)  in intel_dp_tunnel_atomic_check_link()
670 				       failed_stream_mask, "DP tunnel link BW");  in intel_dp_tunnel_atomic_check_link()
672 	return err ? : -EAGAIN;  in intel_dp_tunnel_atomic_check_link()
693 			tunnel = old_crtc_state->dp_tunnel_ref.tunnel;  in atomic_decrease_bw()
700 		new_tunnel_state = drm_dp_tunnel_atomic_get_new_state(&state->base, tunnel);  in atomic_decrease_bw()
722 	drm_dbg_kms(display->drm,  in queue_retry_work()
725 		    encoder->base.base.id,  in queue_retry_work()
726 		    encoder->base.name);  in queue_retry_work()
739 		struct drm_dp_tunnel *tunnel = crtc_state->dp_tunnel_ref.tunnel;  in atomic_increase_bw()
748 		tunnel_state = drm_dp_tunnel_atomic_get_new_state(&state->base, tunnel);  in atomic_increase_bw()
758  * intel_dp_tunnel_atomic_alloc_bw - Allocate the BW for all modeset tunnels
770  * intel_dp_tunnel_mgr_init - Initialize the DP tunnel manager
773  * Initialize the DP tunnel manager. The tunnel manager will support the
774  * detection/management of DP tunnels on all DP connectors, so the function
783 	struct intel_connector *connector;  in intel_dp_tunnel_mgr_init()  local
786 	drm_connector_list_iter_begin(display->drm, &connector_list_iter);  in intel_dp_tunnel_mgr_init()
787 	for_each_intel_connector_iter(connector, &connector_list_iter) {  in intel_dp_tunnel_mgr_init()
788 		if (connector->base.connector_type != DRM_MODE_CONNECTOR_DisplayPort)  in intel_dp_tunnel_mgr_init()
795 	tunnel_mgr = drm_dp_tunnel_mgr_create(display->drm, dp_connectors);  in intel_dp_tunnel_mgr_init()
799 	display->dp_tunnel_mgr = tunnel_mgr;  in intel_dp_tunnel_mgr_init()
805  * intel_dp_tunnel_mgr_cleanup - Clean up the DP tunnel manager state
808  * Clean up the DP tunnel manager state.
812 	drm_dp_tunnel_mgr_destroy(display->dp_tunnel_mgr);  in intel_dp_tunnel_mgr_cleanup()
813 	display->dp_tunnel_mgr = NULL;  in intel_dp_tunnel_mgr_cleanup()