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()
189  * @aux: DP AUX private structure
198 static void dp_aux_transfer_helper(struct dp_aux_private *aux,  in dp_aux_transfer_helper()  argument
216 	 * duplicate AUX transactions related to this while reading the  in dp_aux_transfer_helper()
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()
248 	 * native AUX transfer function.  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()
263  * This function does the real job to process an AUX transaction.
264  * It will call aux_reset() function to reset the AUX channel,
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()
298 	mutex_lock(&aux->mutex);  in dp_aux_transfer()
299 	if (!aux->initted) {  in dp_aux_transfer()
307 	 * turned on the panel and then tried to do an AUX transfer. The panel  in dp_aux_transfer()
312 	if (aux->is_edp) {  in dp_aux_transfer()
313 		ret = dp_catalog_aux_wait_for_hpd_connect_state(aux->catalog);  in dp_aux_transfer()
315 			DRM_DEBUG_DP("Panel not ready for aux transactions\n");  in dp_aux_transfer()
320 	dp_aux_update_offset_and_segment(aux, msg);  in dp_aux_transfer()
321 	dp_aux_transfer_helper(aux, msg, true);  in dp_aux_transfer()
323 	aux->read = msg->request & (DP_AUX_I2C_READ & DP_AUX_NATIVE_READ);  in dp_aux_transfer()
324 	aux->cmd_busy = true;  in dp_aux_transfer()
326 	if (aux->read) {  in dp_aux_transfer()
327 		aux->no_send_addr = true;  in dp_aux_transfer()
328 		aux->no_send_stop = false;  in dp_aux_transfer()
330 		aux->no_send_addr = true;  in dp_aux_transfer()
331 		aux->no_send_stop = true;  in dp_aux_transfer()
334 	ret = dp_aux_cmd_fifo_tx(aux, msg);  in dp_aux_transfer()
336 		if (aux->native) {  in dp_aux_transfer()
337 			aux->retry_cnt++;  in dp_aux_transfer()
338 			if (!(aux->retry_cnt % MAX_AUX_RETRIES))  in dp_aux_transfer()
339 				dp_catalog_aux_update_cfg(aux->catalog);  in dp_aux_transfer()
341 		/* reset aux if link is in connected state */  in dp_aux_transfer()
342 		if (dp_catalog_link_is_connected(aux->catalog))  in dp_aux_transfer()
343 			dp_catalog_aux_reset(aux->catalog);  in dp_aux_transfer()
345 		aux->retry_cnt = 0;  in dp_aux_transfer()
346 		switch (aux->aux_error_num) {  in dp_aux_transfer()
348 			if (aux->read)  in dp_aux_transfer()
349 				ret = dp_aux_cmd_fifo_rx(aux, msg);  in dp_aux_transfer()
350 			msg->reply = aux->native ? DP_AUX_NATIVE_REPLY_ACK : DP_AUX_I2C_REPLY_ACK;  in dp_aux_transfer()
353 			msg->reply = aux->native ? DP_AUX_NATIVE_REPLY_DEFER : DP_AUX_I2C_REPLY_DEFER;  in dp_aux_transfer()
359 			msg->reply = aux->native ? DP_AUX_NATIVE_REPLY_NACK : DP_AUX_I2C_REPLY_NACK;  in dp_aux_transfer()
367 	aux->cmd_busy = false;  in dp_aux_transfer()
370 	mutex_unlock(&aux->mutex);  in dp_aux_transfer()
379 	struct dp_aux_private *aux;  in dp_aux_isr()  local
386 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_isr()
388 	isr = dp_catalog_aux_get_irq(aux->catalog);  in dp_aux_isr()
394 	if (!aux->cmd_busy) {  in dp_aux_isr()
395 		DRM_ERROR("Unexpected DP AUX IRQ %#010x when not busy\n", isr);  in dp_aux_isr()
406 		DRM_WARN("Some DP AUX interrupts unhandled: %#010x\n", isr);  in dp_aux_isr()
409 		aux->aux_error_num = DP_AUX_ERR_PHY;  in dp_aux_isr()
410 		dp_catalog_aux_clear_hw_interrupts(aux->catalog);  in dp_aux_isr()
412 		aux->aux_error_num = DP_AUX_ERR_NACK_DEFER;  in dp_aux_isr()
414 		aux->aux_error_num = DP_AUX_ERR_ADDR;  in dp_aux_isr()
416 		aux->aux_error_num = DP_AUX_ERR_TOUT;  in dp_aux_isr()
417 	} else if (!aux->native && (isr & DP_INTR_I2C_NACK)) {  in dp_aux_isr()
418 		aux->aux_error_num = DP_AUX_ERR_NACK;  in dp_aux_isr()
419 	} else if (!aux->native && (isr & DP_INTR_I2C_DEFER)) {  in dp_aux_isr()
421 			aux->aux_error_num = DP_AUX_ERR_NACK;  in dp_aux_isr()
423 			aux->aux_error_num = DP_AUX_ERR_DEFER;  in dp_aux_isr()
425 		aux->aux_error_num = DP_AUX_ERR_NONE;  in dp_aux_isr()
431 	complete(&aux->comp);  in dp_aux_isr()
438 	struct dp_aux_private *aux;  in dp_aux_reconfig()  local
440 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_reconfig()
442 	dp_catalog_aux_update_cfg(aux->catalog);  in dp_aux_reconfig()
443 	dp_catalog_aux_reset(aux->catalog);  in dp_aux_reconfig()
448 	struct dp_aux_private *aux;  in dp_aux_init()  local
455 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_init()
457 	mutex_lock(&aux->mutex);  in dp_aux_init()
459 	dp_catalog_aux_enable(aux->catalog, true);  in dp_aux_init()
460 	aux->retry_cnt = 0;  in dp_aux_init()
461 	aux->initted = true;  in dp_aux_init()
463 	mutex_unlock(&aux->mutex);  in dp_aux_init()
468 	struct dp_aux_private *aux;  in dp_aux_deinit()  local
470 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_deinit()
472 	mutex_lock(&aux->mutex);  in dp_aux_deinit()
474 	aux->initted = false;  in dp_aux_deinit()
475 	dp_catalog_aux_enable(aux->catalog, false);  in dp_aux_deinit()
477 	mutex_unlock(&aux->mutex);  in dp_aux_deinit()
491 		DRM_ERROR("%s: failed to register drm aux: %d\n", __func__,  in dp_aux_register()
508 	struct dp_aux_private *aux;  in dp_wait_hpd_asserted()  local
510 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_wait_hpd_asserted()
512 	pm_runtime_get_sync(aux->dev);  in dp_wait_hpd_asserted()
513 	ret = dp_catalog_aux_wait_for_hpd_connect_state(aux->catalog);  in dp_wait_hpd_asserted()
514 	pm_runtime_put_sync(aux->dev);  in dp_wait_hpd_asserted()
522 	struct dp_aux_private *aux;  in dp_aux_get()  local
529 	aux = devm_kzalloc(dev, sizeof(*aux), GFP_KERNEL);  in dp_aux_get()
530 	if (!aux)  in dp_aux_get()
533 	init_completion(&aux->comp);  in dp_aux_get()
534 	aux->cmd_busy = false;  in dp_aux_get()
535 	aux->is_edp = is_edp;  in dp_aux_get()
536 	mutex_init(&aux->mutex);  in dp_aux_get()
538 	aux->dev = dev;  in dp_aux_get()
539 	aux->catalog = catalog;  in dp_aux_get()
540 	aux->retry_cnt = 0;  in dp_aux_get()
543 	 * Use the drm_dp_aux_init() to use the aux adapter  in dp_aux_get()
544 	 * before registering AUX with the DRM device so that  in dp_aux_get()
547 	aux->dp_aux.name = "dpu_dp_aux";  in dp_aux_get()
548 	aux->dp_aux.dev = dev;  in dp_aux_get()
549 	aux->dp_aux.transfer = dp_aux_transfer;  in dp_aux_get()
550 	aux->dp_aux.wait_hpd_asserted = dp_wait_hpd_asserted;  in dp_aux_get()
551 	drm_dp_aux_init(&aux->dp_aux);  in dp_aux_get()
553 	return &aux->dp_aux;  in dp_aux_get()
558 	struct dp_aux_private *aux;  in dp_aux_put()  local
563 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_put()
565 	mutex_destroy(&aux->mutex);  in dp_aux_put()
567 	devm_kfree(aux->dev, aux);  in dp_aux_put()