46 static ssize_t dp_aux_write(struct dp_aux_private *aux,  in dp_aux_write()  argument
56 	if (aux->read)  in dp_aux_write()
72 	if (aux->read)  in dp_aux_write()
87 		aux->catalog->aux_data = reg;  in dp_aux_write()
88 		dp_catalog_aux_write_data(aux->catalog);  in dp_aux_write()
91 	dp_catalog_aux_clear_trans(aux->catalog, false);  in dp_aux_write()
92 	dp_catalog_aux_clear_hw_interrupts(aux->catalog);  in dp_aux_write()
95 	if (!aux->native) { /* i2c */  in dp_aux_write()
98 		if (aux->no_send_addr)  in dp_aux_write()
101 		if (aux->no_send_stop)  in dp_aux_write()
106 	aux->catalog->aux_data = reg;  in dp_aux_write()
107 	dp_catalog_aux_write_trans(aux->catalog);  in dp_aux_write()
112 static ssize_t dp_aux_cmd_fifo_tx(struct dp_aux_private *aux,  in dp_aux_cmd_fifo_tx()  argument
118 	reinit_completion(&aux->comp);  in dp_aux_cmd_fifo_tx()
120 	ret = dp_aux_write(aux, msg);  in dp_aux_cmd_fifo_tx()
124 	time_left = wait_for_completion_timeout(&aux->comp,  in dp_aux_cmd_fifo_tx()
132 static ssize_t dp_aux_cmd_fifo_rx(struct dp_aux_private *aux,  in dp_aux_cmd_fifo_rx()  argument
140 	dp_catalog_aux_clear_trans(aux->catalog, true);  in dp_aux_cmd_fifo_rx()
145 	aux->catalog->aux_data = data;  in dp_aux_cmd_fifo_rx()
146 	dp_catalog_aux_write_data(aux->catalog);  in dp_aux_cmd_fifo_rx()
151 	data = dp_catalog_aux_read_data(aux->catalog);  in dp_aux_cmd_fifo_rx()
154 		data = dp_catalog_aux_read_data(aux->catalog);  in dp_aux_cmd_fifo_rx()
165 static void dp_aux_update_offset_and_segment(struct dp_aux_private *aux,  in dp_aux_update_offset_and_segment()  argument
174 	if (aux->native || i2c_read || ((input_msg->address != edid_address) &&  in dp_aux_update_offset_and_segment()
181 		aux->segment = *data;  in dp_aux_update_offset_and_segment()
183 		aux->offset = *data;  in dp_aux_update_offset_and_segment()
198 static void dp_aux_transfer_helper(struct dp_aux_private *aux,  in dp_aux_transfer_helper()  argument
219 	if (!(aux->offset % edid_block_length) || !send_seg)  in dp_aux_transfer_helper()
222 	aux->read = false;  in dp_aux_transfer_helper()
223 	aux->cmd_busy = true;  in dp_aux_transfer_helper()
224 	aux->no_send_addr = true;  in dp_aux_transfer_helper()
225 	aux->no_send_stop = true;  in dp_aux_transfer_helper()
235 	if (aux->segment) {  in dp_aux_transfer_helper()
238 		helper_msg.buffer = &aux->segment;  in dp_aux_transfer_helper()
240 		dp_aux_cmd_fifo_tx(aux, &helper_msg);  in dp_aux_transfer_helper()
252 	helper_msg.buffer = &aux->offset;  in dp_aux_transfer_helper()
254 	dp_aux_cmd_fifo_tx(aux, &helper_msg);  in dp_aux_transfer_helper()
257 	aux->offset += message_size;  in dp_aux_transfer_helper()
258 	if (aux->offset == 0x80 || aux->offset == 0x100)  in dp_aux_transfer_helper()
259 		aux->segment = 0x0; /* reset segment at end of block */  in dp_aux_transfer_helper()
273 	struct dp_aux_private *aux;  in dp_aux_transfer()  local
275 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_transfer()
277 	aux->native = msg->request & (DP_AUX_NATIVE_WRITE & DP_AUX_NATIVE_READ);  in dp_aux_transfer()
281 		msg->reply = aux->native ?  in dp_aux_transfer()
287 	if ((aux->native && msg->size > aux_cmd_native_max) ||  in dp_aux_transfer()
294 	mutex_lock(&aux->mutex);  in dp_aux_transfer()
295 	if (!aux->initted) {  in dp_aux_transfer()
308 	if (aux->is_edp) {  in dp_aux_transfer()
309 		ret = dp_catalog_aux_wait_for_hpd_connect_state(aux->catalog);  in dp_aux_transfer()
316 	dp_aux_update_offset_and_segment(aux, msg);  in dp_aux_transfer()
317 	dp_aux_transfer_helper(aux, msg, true);  in dp_aux_transfer()
319 	aux->read = msg->request & (DP_AUX_I2C_READ & DP_AUX_NATIVE_READ);  in dp_aux_transfer()
320 	aux->cmd_busy = true;  in dp_aux_transfer()
322 	if (aux->read) {  in dp_aux_transfer()
323 		aux->no_send_addr = true;  in dp_aux_transfer()
324 		aux->no_send_stop = false;  in dp_aux_transfer()
326 		aux->no_send_addr = true;  in dp_aux_transfer()
327 		aux->no_send_stop = true;  in dp_aux_transfer()
330 	ret = dp_aux_cmd_fifo_tx(aux, msg);  in dp_aux_transfer()
332 		if (aux->native) {  in dp_aux_transfer()
333 			aux->retry_cnt++;  in dp_aux_transfer()
334 			if (!(aux->retry_cnt % MAX_AUX_RETRIES))  in dp_aux_transfer()
335 				dp_catalog_aux_update_cfg(aux->catalog);  in dp_aux_transfer()
338 		if (dp_catalog_link_is_connected(aux->catalog))  in dp_aux_transfer()
339 			dp_catalog_aux_reset(aux->catalog);  in dp_aux_transfer()
341 		aux->retry_cnt = 0;  in dp_aux_transfer()
342 		switch (aux->aux_error_num) {  in dp_aux_transfer()
344 			if (aux->read)  in dp_aux_transfer()
345 				ret = dp_aux_cmd_fifo_rx(aux, msg);  in dp_aux_transfer()
346 			msg->reply = aux->native ? DP_AUX_NATIVE_REPLY_ACK : DP_AUX_I2C_REPLY_ACK;  in dp_aux_transfer()
349 			msg->reply = aux->native ? DP_AUX_NATIVE_REPLY_DEFER : DP_AUX_I2C_REPLY_DEFER;  in dp_aux_transfer()
355 			msg->reply = aux->native ? DP_AUX_NATIVE_REPLY_NACK : DP_AUX_I2C_REPLY_NACK;  in dp_aux_transfer()
363 	aux->cmd_busy = false;  in dp_aux_transfer()
366 	mutex_unlock(&aux->mutex);  in dp_aux_transfer()
374 	struct dp_aux_private *aux;  in dp_aux_isr()  local
381 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_isr()
383 	isr = dp_catalog_aux_get_irq(aux->catalog);  in dp_aux_isr()
389 	if (!aux->cmd_busy) {  in dp_aux_isr()
404 		aux->aux_error_num = DP_AUX_ERR_PHY;  in dp_aux_isr()
405 		dp_catalog_aux_clear_hw_interrupts(aux->catalog);  in dp_aux_isr()
407 		aux->aux_error_num = DP_AUX_ERR_NACK_DEFER;  in dp_aux_isr()
409 		aux->aux_error_num = DP_AUX_ERR_ADDR;  in dp_aux_isr()
411 		aux->aux_error_num = DP_AUX_ERR_TOUT;  in dp_aux_isr()
412 	} else if (!aux->native && (isr & DP_INTR_I2C_NACK)) {  in dp_aux_isr()
413 		aux->aux_error_num = DP_AUX_ERR_NACK;  in dp_aux_isr()
414 	} else if (!aux->native && (isr & DP_INTR_I2C_DEFER)) {  in dp_aux_isr()
416 			aux->aux_error_num = DP_AUX_ERR_NACK;  in dp_aux_isr()
418 			aux->aux_error_num = DP_AUX_ERR_DEFER;  in dp_aux_isr()
420 		aux->aux_error_num = DP_AUX_ERR_NONE;  in dp_aux_isr()
426 	complete(&aux->comp);  in dp_aux_isr()
433 	struct dp_aux_private *aux;  in dp_aux_reconfig()  local
435 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_reconfig()
437 	dp_catalog_aux_update_cfg(aux->catalog);  in dp_aux_reconfig()
438 	dp_catalog_aux_reset(aux->catalog);  in dp_aux_reconfig()
443 	struct dp_aux_private *aux;  in dp_aux_init()  local
450 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_init()
452 	mutex_lock(&aux->mutex);  in dp_aux_init()
454 	dp_catalog_aux_enable(aux->catalog, true);  in dp_aux_init()
455 	aux->retry_cnt = 0;  in dp_aux_init()
456 	aux->initted = true;  in dp_aux_init()
458 	mutex_unlock(&aux->mutex);  in dp_aux_init()
463 	struct dp_aux_private *aux;  in dp_aux_deinit()  local
465 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_deinit()
467 	mutex_lock(&aux->mutex);  in dp_aux_deinit()
469 	aux->initted = false;  in dp_aux_deinit()
470 	dp_catalog_aux_enable(aux->catalog, false);  in dp_aux_deinit()
472 	mutex_unlock(&aux->mutex);  in dp_aux_deinit()
477 	struct dp_aux_private *aux;  in dp_aux_register()  local
485 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_register()
487 	aux->dp_aux.name = "dpu_dp_aux";  in dp_aux_register()
488 	aux->dp_aux.dev = aux->dev;  in dp_aux_register()
489 	aux->dp_aux.transfer = dp_aux_transfer;  in dp_aux_register()
490 	ret = drm_dp_aux_register(&aux->dp_aux);  in dp_aux_register()
508 	struct dp_aux_private *aux;  in dp_aux_get()  local
515 	aux = devm_kzalloc(dev, sizeof(*aux), GFP_KERNEL);  in dp_aux_get()
516 	if (!aux)  in dp_aux_get()
519 	init_completion(&aux->comp);  in dp_aux_get()
520 	aux->cmd_busy = false;  in dp_aux_get()
521 	aux->is_edp = is_edp;  in dp_aux_get()
522 	mutex_init(&aux->mutex);  in dp_aux_get()
524 	aux->dev = dev;  in dp_aux_get()
525 	aux->catalog = catalog;  in dp_aux_get()
526 	aux->retry_cnt = 0;  in dp_aux_get()
528 	return &aux->dp_aux;  in dp_aux_get()
533 	struct dp_aux_private *aux;  in dp_aux_put()  local
538 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_put()
540 	mutex_destroy(&aux->mutex);  in dp_aux_put()
542 	devm_kfree(aux->dev, aux);  in dp_aux_put()