50 static ssize_t dp_aux_write(struct dp_aux_private *aux,  in dp_aux_write()  argument
60 	if (aux->read)  in dp_aux_write()
76 	if (aux->read)  in dp_aux_write()
91 		dp_catalog_aux_write_data(aux->catalog, reg);  in dp_aux_write()
94 	dp_catalog_aux_clear_trans(aux->catalog, false);  in dp_aux_write()
95 	dp_catalog_aux_clear_hw_interrupts(aux->catalog);  in dp_aux_write()
98 	if (!aux->native) { /* i2c */  in dp_aux_write()
101 		if (aux->no_send_addr)  in dp_aux_write()
104 		if (aux->no_send_stop)  in dp_aux_write()
109 	dp_catalog_aux_write_trans(aux->catalog, reg);  in dp_aux_write()
114 static ssize_t dp_aux_cmd_fifo_tx(struct dp_aux_private *aux,  in dp_aux_cmd_fifo_tx()  argument
120 	reinit_completion(&aux->comp);  in dp_aux_cmd_fifo_tx()
122 	ret = dp_aux_write(aux, msg);  in dp_aux_cmd_fifo_tx()
126 	time_left = wait_for_completion_timeout(&aux->comp,  in dp_aux_cmd_fifo_tx()
134 static ssize_t dp_aux_cmd_fifo_rx(struct dp_aux_private *aux,  in dp_aux_cmd_fifo_rx()  argument
142 	dp_catalog_aux_clear_trans(aux->catalog, true);  in dp_aux_cmd_fifo_rx()
147 	dp_catalog_aux_write_data(aux->catalog, data);  in dp_aux_cmd_fifo_rx()
152 	data = dp_catalog_aux_read_data(aux->catalog);  in dp_aux_cmd_fifo_rx()
155 		data = dp_catalog_aux_read_data(aux->catalog);  in dp_aux_cmd_fifo_rx()
166 static void dp_aux_update_offset_and_segment(struct dp_aux_private *aux,  in dp_aux_update_offset_and_segment()  argument
175 	if (aux->native || i2c_read || ((input_msg->address != edid_address) &&  in dp_aux_update_offset_and_segment()
182 		aux->segment = *data;  in dp_aux_update_offset_and_segment()
184 		aux->offset = *data;  in dp_aux_update_offset_and_segment()
190  * @aux: DP AUX private structure
199 static void dp_aux_transfer_helper(struct dp_aux_private *aux,  in dp_aux_transfer_helper()  argument
217 	 * duplicate AUX transactions related to this while reading the  in dp_aux_transfer_helper()
220 	if (!(aux->offset % edid_block_length) || !send_seg)  in dp_aux_transfer_helper()
223 	aux->read = false;  in dp_aux_transfer_helper()
224 	aux->cmd_busy = true;  in dp_aux_transfer_helper()
225 	aux->no_send_addr = true;  in dp_aux_transfer_helper()
226 	aux->no_send_stop = true;  in dp_aux_transfer_helper()
236 	if (aux->segment) {  in dp_aux_transfer_helper()
239 		helper_msg.buffer = &aux->segment;  in dp_aux_transfer_helper()
241 		dp_aux_cmd_fifo_tx(aux, &helper_msg);  in dp_aux_transfer_helper()
249 	 * native AUX transfer function.  in dp_aux_transfer_helper()
253 	helper_msg.buffer = &aux->offset;  in dp_aux_transfer_helper()
255 	dp_aux_cmd_fifo_tx(aux, &helper_msg);  in dp_aux_transfer_helper()
258 	aux->offset += message_size;  in dp_aux_transfer_helper()
259 	if (aux->offset == 0x80 || aux->offset == 0x100)  in dp_aux_transfer_helper()
260 		aux->segment = 0x0; /* reset segment at end of block */  in dp_aux_transfer_helper()
264  * This function does the real job to process an AUX transaction.
265  * It will call aux_reset() function to reset the AUX channel,
274 	struct dp_aux_private *aux;  in dp_aux_transfer()  local
276 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_transfer()
278 	aux->native = msg->request & (DP_AUX_NATIVE_WRITE & DP_AUX_NATIVE_READ);  in dp_aux_transfer()
282 		msg->reply = aux->native ?  in dp_aux_transfer()
288 	if ((aux->native && msg->size > aux_cmd_native_max) ||  in dp_aux_transfer()
299 	mutex_lock(&aux->mutex);  in dp_aux_transfer()
300 	if (!aux->initted) {  in dp_aux_transfer()
308 	 * can end up with long timeouts if someone tries to access the DP AUX  in dp_aux_transfer()
311 	if (!aux->is_edp && !aux->enable_xfers) {  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 				phy_calibrate(aux->phy);  in dp_aux_transfer()
337 		/* reset aux if link is in connected state */  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()
375 	struct dp_aux_private *aux;  in dp_aux_isr()  local
382 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_isr()
384 	isr = dp_catalog_aux_get_irq(aux->catalog);  in dp_aux_isr()
390 	if (!aux->cmd_busy) {  in dp_aux_isr()
391 		DRM_ERROR("Unexpected DP AUX IRQ %#010x when not busy\n", isr);  in dp_aux_isr()
402 		DRM_WARN("Some DP AUX interrupts unhandled: %#010x\n", isr);  in dp_aux_isr()
405 		aux->aux_error_num = DP_AUX_ERR_PHY;  in dp_aux_isr()
406 		dp_catalog_aux_clear_hw_interrupts(aux->catalog);  in dp_aux_isr()
408 		aux->aux_error_num = DP_AUX_ERR_NACK_DEFER;  in dp_aux_isr()
410 		aux->aux_error_num = DP_AUX_ERR_ADDR;  in dp_aux_isr()
412 		aux->aux_error_num = DP_AUX_ERR_TOUT;  in dp_aux_isr()
413 	} else if (!aux->native && (isr & DP_INTR_I2C_NACK)) {  in dp_aux_isr()
414 		aux->aux_error_num = DP_AUX_ERR_NACK;  in dp_aux_isr()
415 	} else if (!aux->native && (isr & DP_INTR_I2C_DEFER)) {  in dp_aux_isr()
417 			aux->aux_error_num = DP_AUX_ERR_NACK;  in dp_aux_isr()
419 			aux->aux_error_num = DP_AUX_ERR_DEFER;  in dp_aux_isr()
421 		aux->aux_error_num = DP_AUX_ERR_NONE;  in dp_aux_isr()
427 	complete(&aux->comp);  in dp_aux_isr()
434 	struct dp_aux_private *aux;  in dp_aux_enable_xfers()  local
436 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_enable_xfers()
437 	aux->enable_xfers = enabled;  in dp_aux_enable_xfers()
442 	struct dp_aux_private *aux;  in dp_aux_reconfig()  local
444 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_reconfig()
446 	phy_calibrate(aux->phy);  in dp_aux_reconfig()
447 	dp_catalog_aux_reset(aux->catalog);  in dp_aux_reconfig()
452 	struct dp_aux_private *aux;  in dp_aux_init()  local
459 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_init()
461 	mutex_lock(&aux->mutex);  in dp_aux_init()
463 	dp_catalog_aux_enable(aux->catalog, true);  in dp_aux_init()
464 	aux->retry_cnt = 0;  in dp_aux_init()
465 	aux->initted = true;  in dp_aux_init()
467 	mutex_unlock(&aux->mutex);  in dp_aux_init()
472 	struct dp_aux_private *aux;  in dp_aux_deinit()  local
474 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_deinit()
476 	mutex_lock(&aux->mutex);  in dp_aux_deinit()
478 	aux->initted = false;  in dp_aux_deinit()
479 	dp_catalog_aux_enable(aux->catalog, false);  in dp_aux_deinit()
481 	mutex_unlock(&aux->mutex);  in dp_aux_deinit()
495 		DRM_ERROR("%s: failed to register drm aux: %d\n", __func__,  in dp_aux_register()
512 	struct dp_aux_private *aux;  in dp_wait_hpd_asserted()  local
514 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_wait_hpd_asserted()
516 	ret = pm_runtime_resume_and_get(aux->dev);  in dp_wait_hpd_asserted()
520 	ret = dp_catalog_aux_wait_for_hpd_connect_state(aux->catalog, wait_us);  in dp_wait_hpd_asserted()
521 	pm_runtime_put_sync(aux->dev);  in dp_wait_hpd_asserted()
530 	struct dp_aux_private *aux;  in dp_aux_get()  local
537 	aux = devm_kzalloc(dev, sizeof(*aux), GFP_KERNEL);  in dp_aux_get()
538 	if (!aux)  in dp_aux_get()
541 	init_completion(&aux->comp);  in dp_aux_get()
542 	aux->cmd_busy = false;  in dp_aux_get()
543 	aux->is_edp = is_edp;  in dp_aux_get()
544 	mutex_init(&aux->mutex);  in dp_aux_get()
546 	aux->dev = dev;  in dp_aux_get()
547 	aux->catalog = catalog;  in dp_aux_get()
548 	aux->phy = phy;  in dp_aux_get()
549 	aux->retry_cnt = 0;  in dp_aux_get()
552 	 * Use the drm_dp_aux_init() to use the aux adapter  in dp_aux_get()
553 	 * before registering AUX with the DRM device so that  in dp_aux_get()
556 	aux->dp_aux.name = "dpu_dp_aux";  in dp_aux_get()
557 	aux->dp_aux.dev = dev;  in dp_aux_get()
558 	aux->dp_aux.transfer = dp_aux_transfer;  in dp_aux_get()
559 	aux->dp_aux.wait_hpd_asserted = dp_wait_hpd_asserted;  in dp_aux_get()
560 	drm_dp_aux_init(&aux->dp_aux);  in dp_aux_get()
562 	return &aux->dp_aux;  in dp_aux_get()
567 	struct dp_aux_private *aux;  in dp_aux_put()  local
572 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);  in dp_aux_put()
574 	mutex_destroy(&aux->mutex);  in dp_aux_put()
576 	devm_kfree(aux->dev, aux);  in dp_aux_put()