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_native_handler(struct dp_aux_private *aux, u32 isr)  in dp_aux_native_handler()  argument
168 		aux->aux_error_num = DP_AUX_ERR_NONE;  in dp_aux_native_handler()
170 		aux->aux_error_num = DP_AUX_ERR_ADDR;  in dp_aux_native_handler()
172 		aux->aux_error_num = DP_AUX_ERR_TOUT;  in dp_aux_native_handler()
174 		aux->aux_error_num = DP_AUX_ERR_NACK;  in dp_aux_native_handler()
176 		aux->aux_error_num = DP_AUX_ERR_PHY;  in dp_aux_native_handler()
177 		dp_catalog_aux_clear_hw_interrupts(aux->catalog);  in dp_aux_native_handler()
181 static void dp_aux_i2c_handler(struct dp_aux_private *aux, u32 isr)  in dp_aux_i2c_handler()  argument
185 			aux->aux_error_num = DP_AUX_ERR_NACK;  in dp_aux_i2c_handler()
187 			aux->aux_error_num = DP_AUX_ERR_NONE;  in dp_aux_i2c_handler()
190 			aux->aux_error_num = DP_AUX_ERR_ADDR;  in dp_aux_i2c_handler()
192 			aux->aux_error_num = DP_AUX_ERR_TOUT;  in dp_aux_i2c_handler()
194 			aux->aux_error_num = DP_AUX_ERR_NACK_DEFER;  in dp_aux_i2c_handler()
196 			aux->aux_error_num = DP_AUX_ERR_NACK;  in dp_aux_i2c_handler()
198 			aux->aux_error_num = DP_AUX_ERR_DEFER;  in dp_aux_i2c_handler()
200 			aux->aux_error_num = DP_AUX_ERR_PHY;  in dp_aux_i2c_handler()
201 			dp_catalog_aux_clear_hw_interrupts(aux->catalog);  in dp_aux_i2c_handler()
206 static void dp_aux_update_offset_and_segment(struct dp_aux_private *aux,  in dp_aux_update_offset_and_segment()  argument
215 	if (aux->native || i2c_read || ((input_msg->address != edid_address) &&  in dp_aux_update_offset_and_segment()
222 		aux->segment = *data;  in dp_aux_update_offset_and_segment()
224 		aux->offset = *data;  in dp_aux_update_offset_and_segment()
230  * @aux: DP AUX private structure
239 static void dp_aux_transfer_helper(struct dp_aux_private *aux,  in dp_aux_transfer_helper()  argument
257 	 * duplicate AUX transactions related to this while reading the  in dp_aux_transfer_helper()
260 	if (!(aux->offset % edid_block_length) || !send_seg)  in dp_aux_transfer_helper()
263 	aux->read = false;  in dp_aux_transfer_helper()
264 	aux->cmd_busy = true;  in dp_aux_transfer_helper()
265 	aux->no_send_addr = true;  in dp_aux_transfer_helper()
266 	aux->no_send_stop = true;  in dp_aux_transfer_helper()
276 	if (aux->segment) {  in dp_aux_transfer_helper()
279 		helper_msg.buffer = &aux->segment;  in dp_aux_transfer_helper()
281 		dp_aux_cmd_fifo_tx(aux, &helper_msg);  in dp_aux_transfer_helper()
289 	 * native AUX transfer function.  in dp_aux_transfer_helper()
293 	helper_msg.buffer = &aux->offset;  in dp_aux_transfer_helper()
295 	dp_aux_cmd_fifo_tx(aux, &helper_msg);  in dp_aux_transfer_helper()
298 	aux->offset += message_size;  in dp_aux_transfer_helper()
299 	if (aux->offset == 0x80 || aux->offset == 0x100)  in dp_aux_transfer_helper()
300 		aux->segment = 0x0; /* reset segment at end of block */  in dp_aux_transfer_helper()
304  * This function does the real job to process an AUX transaction.
305  * It will call aux_reset() function to reset the AUX channel,
314 	struct dp_aux_private *aux;  in dp_aux_transfer()  local
316 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_transfer()
318 	aux->native = msg->request & (DP_AUX_NATIVE_WRITE & DP_AUX_NATIVE_READ);  in dp_aux_transfer()
322 		msg->reply = aux->native ?  in dp_aux_transfer()
328 	if ((aux->native && msg->size > aux_cmd_native_max) ||  in dp_aux_transfer()
335 	mutex_lock(&aux->mutex);  in dp_aux_transfer()
336 	if (!aux->initted) {  in dp_aux_transfer()
344 	 * turned on the panel and then tried to do an AUX transfer. The panel  in dp_aux_transfer()
349 	if (aux->is_edp) {  in dp_aux_transfer()
350 		ret = dp_catalog_aux_wait_for_hpd_connect_state(aux->catalog);  in dp_aux_transfer()
352 			DRM_DEBUG_DP("Panel not ready for aux transactions\n");  in dp_aux_transfer()
357 	dp_aux_update_offset_and_segment(aux, msg);  in dp_aux_transfer()
358 	dp_aux_transfer_helper(aux, msg, true);  in dp_aux_transfer()
360 	aux->read = msg->request & (DP_AUX_I2C_READ & DP_AUX_NATIVE_READ);  in dp_aux_transfer()
361 	aux->cmd_busy = true;  in dp_aux_transfer()
363 	if (aux->read) {  in dp_aux_transfer()
364 		aux->no_send_addr = true;  in dp_aux_transfer()
365 		aux->no_send_stop = false;  in dp_aux_transfer()
367 		aux->no_send_addr = true;  in dp_aux_transfer()
368 		aux->no_send_stop = true;  in dp_aux_transfer()
371 	ret = dp_aux_cmd_fifo_tx(aux, msg);  in dp_aux_transfer()
373 		if (aux->native) {  in dp_aux_transfer()
374 			aux->retry_cnt++;  in dp_aux_transfer()
375 			if (!(aux->retry_cnt % MAX_AUX_RETRIES))  in dp_aux_transfer()
376 				dp_catalog_aux_update_cfg(aux->catalog);  in dp_aux_transfer()
378 		/* reset aux if link is in connected state */  in dp_aux_transfer()
379 		if (dp_catalog_link_is_connected(aux->catalog))  in dp_aux_transfer()
380 			dp_catalog_aux_reset(aux->catalog);  in dp_aux_transfer()
382 		aux->retry_cnt = 0;  in dp_aux_transfer()
383 		switch (aux->aux_error_num) {  in dp_aux_transfer()
385 			if (aux->read)  in dp_aux_transfer()
386 				ret = dp_aux_cmd_fifo_rx(aux, msg);  in dp_aux_transfer()
387 			msg->reply = aux->native ? DP_AUX_NATIVE_REPLY_ACK : DP_AUX_I2C_REPLY_ACK;  in dp_aux_transfer()
390 			msg->reply = aux->native ? DP_AUX_NATIVE_REPLY_DEFER : DP_AUX_I2C_REPLY_DEFER;  in dp_aux_transfer()
396 			msg->reply = aux->native ? DP_AUX_NATIVE_REPLY_NACK : DP_AUX_I2C_REPLY_NACK;  in dp_aux_transfer()
404 	aux->cmd_busy = false;  in dp_aux_transfer()
407 	mutex_unlock(&aux->mutex);  in dp_aux_transfer()
415 	struct dp_aux_private *aux;  in dp_aux_isr()  local
422 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_isr()
424 	isr = dp_catalog_aux_get_irq(aux->catalog);  in dp_aux_isr()
426 	if (!aux->cmd_busy)  in dp_aux_isr()
429 	if (aux->native)  in dp_aux_isr()
430 		dp_aux_native_handler(aux, isr);  in dp_aux_isr()
432 		dp_aux_i2c_handler(aux, isr);  in dp_aux_isr()
434 	complete(&aux->comp);  in dp_aux_isr()
439 	struct dp_aux_private *aux;  in dp_aux_reconfig()  local
441 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_reconfig()
443 	dp_catalog_aux_update_cfg(aux->catalog);  in dp_aux_reconfig()
444 	dp_catalog_aux_reset(aux->catalog);  in dp_aux_reconfig()
449 	struct dp_aux_private *aux;  in dp_aux_init()  local
456 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_init()
458 	mutex_lock(&aux->mutex);  in dp_aux_init()
460 	dp_catalog_aux_enable(aux->catalog, true);  in dp_aux_init()
461 	aux->retry_cnt = 0;  in dp_aux_init()
462 	aux->initted = true;  in dp_aux_init()
464 	mutex_unlock(&aux->mutex);  in dp_aux_init()
469 	struct dp_aux_private *aux;  in dp_aux_deinit()  local
471 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_deinit()
473 	mutex_lock(&aux->mutex);  in dp_aux_deinit()
475 	aux->initted = false;  in dp_aux_deinit()
476 	dp_catalog_aux_enable(aux->catalog, false);  in dp_aux_deinit()
478 	mutex_unlock(&aux->mutex);  in dp_aux_deinit()
483 	struct dp_aux_private *aux;  in dp_aux_register()  local
491 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_register()
493 	aux->dp_aux.name = "dpu_dp_aux";  in dp_aux_register()
494 	aux->dp_aux.dev = aux->dev;  in dp_aux_register()
495 	aux->dp_aux.transfer = dp_aux_transfer;  in dp_aux_register()
496 	ret = drm_dp_aux_register(&aux->dp_aux);  in dp_aux_register()
498 		DRM_ERROR("%s: failed to register drm aux: %d\n", __func__,  in dp_aux_register()
514 	struct dp_aux_private *aux;  in dp_aux_get()  local
521 	aux = devm_kzalloc(dev, sizeof(*aux), GFP_KERNEL);  in dp_aux_get()
522 	if (!aux)  in dp_aux_get()
525 	init_completion(&aux->comp);  in dp_aux_get()
526 	aux->cmd_busy = false;  in dp_aux_get()
527 	aux->is_edp = is_edp;  in dp_aux_get()
528 	mutex_init(&aux->mutex);  in dp_aux_get()
530 	aux->dev = dev;  in dp_aux_get()
531 	aux->catalog = catalog;  in dp_aux_get()
532 	aux->retry_cnt = 0;  in dp_aux_get()
534 	return &aux->dp_aux;  in dp_aux_get()
539 	struct dp_aux_private *aux;  in dp_aux_put()  local
544 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_put()
546 	mutex_destroy(&aux->mutex);  in dp_aux_put()
548 	devm_kfree(aux->dev, aux);  in dp_aux_put()