3  * DisplayPort CEC-Tunneling-over-AUX support
22  * have a converter chip that supports CEC-Tunneling-over-AUX (usually the
57  * These functions take care of supporting the CEC-Tunneling-over-AUX
95 	struct drm_dp_aux *aux = cec_get_drvdata(adap);  in drm_dp_cec_adap_enable()  local
99 	err = drm_dp_dpcd_writeb(aux, DP_CEC_TUNNELING_CONTROL, val);  in drm_dp_cec_adap_enable()
105 	struct drm_dp_aux *aux = cec_get_drvdata(adap);  in drm_dp_cec_adap_log_addr()  local
115 	err = drm_dp_dpcd_write(aux, DP_CEC_LOGICAL_ADDRESS_MASK, mask, 2);  in drm_dp_cec_adap_log_addr()
122 	struct drm_dp_aux *aux = cec_get_drvdata(adap);  in drm_dp_cec_adap_transmit()  local
126 	err = drm_dp_dpcd_write(aux, DP_CEC_TX_MESSAGE_BUFFER,  in drm_dp_cec_adap_transmit()
131 	err = drm_dp_dpcd_writeb(aux, DP_CEC_TX_MESSAGE_INFO,  in drm_dp_cec_adap_transmit()
140 	struct drm_dp_aux *aux = cec_get_drvdata(adap);  in drm_dp_cec_adap_monitor_all_enable()  local
147 	err = drm_dp_dpcd_readb(aux, DP_CEC_TUNNELING_CONTROL, &val);  in drm_dp_cec_adap_monitor_all_enable()
153 		err = drm_dp_dpcd_writeb(aux, DP_CEC_TUNNELING_CONTROL, val);  in drm_dp_cec_adap_monitor_all_enable()
161 	struct drm_dp_aux *aux = cec_get_drvdata(adap);  in drm_dp_cec_adap_status()  local
165 	if (drm_dp_read_desc(aux, &desc, true))  in drm_dp_cec_adap_status()
190 static int drm_dp_cec_received(struct drm_dp_aux *aux)  in drm_dp_cec_received()  argument
192 	struct cec_adapter *adap = aux->cec.adap;  in drm_dp_cec_received()
197 	err = drm_dp_dpcd_readb(aux, DP_CEC_RX_MESSAGE_INFO, &rx_msg_info);  in drm_dp_cec_received()
205 	err = drm_dp_dpcd_read(aux, DP_CEC_RX_MESSAGE_BUFFER, msg.msg, msg.len);  in drm_dp_cec_received()
213 static void drm_dp_cec_handle_irq(struct drm_dp_aux *aux)  in drm_dp_cec_handle_irq()  argument
215 	struct cec_adapter *adap = aux->cec.adap;  in drm_dp_cec_handle_irq()
218 	if (drm_dp_dpcd_readb(aux, DP_CEC_TUNNELING_IRQ_FLAGS, &flags) < 0)  in drm_dp_cec_handle_irq()
222 		drm_dp_cec_received(aux);  in drm_dp_cec_handle_irq()
233 	drm_dp_dpcd_writeb(aux, DP_CEC_TUNNELING_IRQ_FLAGS, flags);  in drm_dp_cec_handle_irq()
238  * @aux: DisplayPort AUX channel
240  * Should be called when handling an IRQ_HPD request. If CEC-tunneling-over-AUX
243 void drm_dp_cec_irq(struct drm_dp_aux *aux)  in drm_dp_cec_irq()  argument
249 	if (!aux->transfer)  in drm_dp_cec_irq()
252 	mutex_lock(&aux->cec.lock);  in drm_dp_cec_irq()
253 	if (!aux->cec.adap)  in drm_dp_cec_irq()
256 	ret = drm_dp_dpcd_readb(aux, DP_DEVICE_SERVICE_IRQ_VECTOR_ESI1,  in drm_dp_cec_irq()
261 	drm_dp_cec_handle_irq(aux);  in drm_dp_cec_irq()
262 	drm_dp_dpcd_writeb(aux, DP_DEVICE_SERVICE_IRQ_VECTOR_ESI1, DP_CEC_IRQ);  in drm_dp_cec_irq()
264 	mutex_unlock(&aux->cec.lock);  in drm_dp_cec_irq()
268 static bool drm_dp_cec_cap(struct drm_dp_aux *aux, u8 *cec_cap)  in drm_dp_cec_cap()  argument
272 	if (drm_dp_dpcd_readb(aux, DP_CEC_TUNNELING_CAPABILITY, &cap) != 1 ||  in drm_dp_cec_cap()
286 	struct drm_dp_aux *aux = container_of(work, struct drm_dp_aux,  in drm_dp_cec_unregister_work()  local
289 	mutex_lock(&aux->cec.lock);  in drm_dp_cec_unregister_work()
290 	cec_unregister_adapter(aux->cec.adap);  in drm_dp_cec_unregister_work()
291 	aux->cec.adap = NULL;  in drm_dp_cec_unregister_work()
292 	mutex_unlock(&aux->cec.lock);  in drm_dp_cec_unregister_work()
301 void drm_dp_cec_attach(struct drm_dp_aux *aux, u16 source_physical_address)  in drm_dp_cec_attach()  argument
303 	struct drm_connector *connector = aux->cec.connector;  in drm_dp_cec_attach()
311 	if (!aux->transfer)  in drm_dp_cec_attach()
324 	cancel_delayed_work_sync(&aux->cec.unregister_work);  in drm_dp_cec_attach()
326 	mutex_lock(&aux->cec.lock);  in drm_dp_cec_attach()
327 	if (!drm_dp_cec_cap(aux, &cap)) {  in drm_dp_cec_attach()
329 		cec_unregister_adapter(aux->cec.adap);  in drm_dp_cec_attach()
330 		aux->cec.adap = NULL;  in drm_dp_cec_attach()
339 	if (aux->cec.adap) {  in drm_dp_cec_attach()
340 		if (aux->cec.adap->capabilities == cec_caps &&  in drm_dp_cec_attach()
341 		    aux->cec.adap->available_log_addrs == num_las) {  in drm_dp_cec_attach()
343 			cec_s_phys_addr(aux->cec.adap, source_physical_address, false);  in drm_dp_cec_attach()
350 		cec_unregister_adapter(aux->cec.adap);  in drm_dp_cec_attach()
354 	aux->cec.adap = cec_allocate_adapter(&drm_dp_cec_adap_ops,  in drm_dp_cec_attach()
355 					     aux, connector->name, cec_caps,  in drm_dp_cec_attach()
357 	if (IS_ERR(aux->cec.adap)) {  in drm_dp_cec_attach()
358 		aux->cec.adap = NULL;  in drm_dp_cec_attach()
363 	cec_s_conn_info(aux->cec.adap, &conn_info);  in drm_dp_cec_attach()
365 	if (cec_register_adapter(aux->cec.adap, connector->dev->dev)) {  in drm_dp_cec_attach()
366 		cec_delete_adapter(aux->cec.adap);  in drm_dp_cec_attach()
367 		aux->cec.adap = NULL;  in drm_dp_cec_attach()
374 		cec_s_phys_addr(aux->cec.adap, source_physical_address, false);  in drm_dp_cec_attach()
377 	mutex_unlock(&aux->cec.lock);  in drm_dp_cec_attach()
385 void drm_dp_cec_set_edid(struct drm_dp_aux *aux, const struct edid *edid)  in drm_dp_cec_set_edid()  argument
393 	drm_dp_cec_attach(aux, pa);  in drm_dp_cec_set_edid()
400 void drm_dp_cec_unset_edid(struct drm_dp_aux *aux)  in drm_dp_cec_unset_edid()  argument
403 	if (!aux->transfer)  in drm_dp_cec_unset_edid()
406 	cancel_delayed_work_sync(&aux->cec.unregister_work);  in drm_dp_cec_unset_edid()
408 	mutex_lock(&aux->cec.lock);  in drm_dp_cec_unset_edid()
409 	if (!aux->cec.adap)  in drm_dp_cec_unset_edid()
412 	cec_phys_addr_invalidate(aux->cec.adap);  in drm_dp_cec_unset_edid()
420 	    !drm_dp_cec_cap(aux, NULL)) {  in drm_dp_cec_unset_edid()
426 		schedule_delayed_work(&aux->cec.unregister_work,  in drm_dp_cec_unset_edid()
430 	mutex_unlock(&aux->cec.lock);  in drm_dp_cec_unset_edid()
436  * @aux: DisplayPort AUX channel
444 void drm_dp_cec_register_connector(struct drm_dp_aux *aux,  in drm_dp_cec_register_connector()  argument
447 	WARN_ON(aux->cec.adap);  in drm_dp_cec_register_connector()
448 	if (WARN_ON(!aux->transfer))  in drm_dp_cec_register_connector()
450 	aux->cec.connector = connector;  in drm_dp_cec_register_connector()
451 	INIT_DELAYED_WORK(&aux->cec.unregister_work,  in drm_dp_cec_register_connector()
458  * @aux: DisplayPort AUX channel
460 void drm_dp_cec_unregister_connector(struct drm_dp_aux *aux)  in drm_dp_cec_unregister_connector()  argument
462 	if (!aux->cec.adap)  in drm_dp_cec_unregister_connector()
464 	cancel_delayed_work_sync(&aux->cec.unregister_work);  in drm_dp_cec_unregister_connector()
465 	cec_unregister_adapter(aux->cec.adap);  in drm_dp_cec_unregister_connector()
466 	aux->cec.adap = NULL;  in drm_dp_cec_unregister_connector()