174 static int drm_dp_dpcd_access(struct drm_dp_aux *aux, u8 request,  in drm_dp_dpcd_access()  argument
195 		mutex_lock(&aux->hw_mutex);  in drm_dp_dpcd_access()
196 		err = aux->transfer(aux, &msg);  in drm_dp_dpcd_access()
197 		mutex_unlock(&aux->hw_mutex);  in drm_dp_dpcd_access()
239 ssize_t drm_dp_dpcd_read(struct drm_dp_aux *aux, unsigned int offset,  in drm_dp_dpcd_read()  argument
242 	return drm_dp_dpcd_access(aux, DP_AUX_NATIVE_READ, offset, buffer,  in drm_dp_dpcd_read()
261 ssize_t drm_dp_dpcd_write(struct drm_dp_aux *aux, unsigned int offset,  in drm_dp_dpcd_write()  argument
264 	return drm_dp_dpcd_access(aux, DP_AUX_NATIVE_WRITE, offset, buffer,  in drm_dp_dpcd_write()
277 int drm_dp_dpcd_read_link_status(struct drm_dp_aux *aux,  in drm_dp_dpcd_read_link_status()  argument
280 	return drm_dp_dpcd_read(aux, DP_LANE0_1_STATUS, status,  in drm_dp_dpcd_read_link_status()
296 int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link)  in drm_dp_link_probe()  argument
303 	err = drm_dp_dpcd_read(aux, DP_DPCD_REV, values, sizeof(values));  in drm_dp_link_probe()
325 int drm_dp_link_power_up(struct drm_dp_aux *aux, struct drm_dp_link *link)  in drm_dp_link_power_up()  argument
334 	err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);  in drm_dp_link_power_up()
341 	err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);  in drm_dp_link_power_up()
363 int drm_dp_link_power_down(struct drm_dp_aux *aux, struct drm_dp_link *link)  in drm_dp_link_power_down()  argument
372 	err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);  in drm_dp_link_power_down()
379 	err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);  in drm_dp_link_power_down()
394 int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link)  in drm_dp_link_configure()  argument
405 	err = drm_dp_dpcd_write(aux, DP_LINK_BW_SET, values, sizeof(values));  in drm_dp_link_configure()
433 static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)  in drm_dp_i2c_do_msg()  argument
444 		mutex_lock(&aux->hw_mutex);  in drm_dp_i2c_do_msg()
445 		ret = aux->transfer(aux, msg);  in drm_dp_i2c_do_msg()
446 		mutex_unlock(&aux->hw_mutex);  in drm_dp_i2c_do_msg()
497 			aux->i2c_nack_count++;  in drm_dp_i2c_do_msg()
502 			aux->i2c_defer_count++;  in drm_dp_i2c_do_msg()
521 static int drm_dp_i2c_drain_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *orig_msg)  in drm_dp_i2c_drain_msg()  argument
527 		err = drm_dp_i2c_do_msg(aux, &msg);  in drm_dp_i2c_drain_msg()
557 	struct drm_dp_aux *aux = adapter->algo_data;  in drm_dp_i2c_xfer()  local
579 		err = drm_dp_i2c_do_msg(aux, &msg);  in drm_dp_i2c_xfer()
591 			err = drm_dp_i2c_drain_msg(aux, &msg);  in drm_dp_i2c_xfer()
608 	(void)drm_dp_i2c_do_msg(aux, &msg);  in drm_dp_i2c_xfer()
624 int drm_dp_aux_register(struct drm_dp_aux *aux)  in drm_dp_aux_register()  argument
626 	mutex_init(&aux->hw_mutex);  in drm_dp_aux_register()
628 	aux->ddc.algo = &drm_dp_i2c_algo;  in drm_dp_aux_register()
629 	aux->ddc.algo_data = aux;  in drm_dp_aux_register()
630 	aux->ddc.retries = 3;  in drm_dp_aux_register()
632 	aux->ddc.class = I2C_CLASS_DDC;  in drm_dp_aux_register()
633 	aux->ddc.owner = THIS_MODULE;  in drm_dp_aux_register()
634 	aux->ddc.dev.parent = aux->dev;  in drm_dp_aux_register()
635 	aux->ddc.dev.of_node = aux->dev->of_node;  in drm_dp_aux_register()
637 	strlcpy(aux->ddc.name, aux->name ? aux->name : dev_name(aux->dev),  in drm_dp_aux_register()
638 		sizeof(aux->ddc.name));  in drm_dp_aux_register()
640 	return i2c_add_adapter(&aux->ddc);  in drm_dp_aux_register()
648 void drm_dp_aux_unregister(struct drm_dp_aux *aux)  in drm_dp_aux_unregister()  argument
650 	i2c_del_adapter(&aux->ddc);  in drm_dp_aux_unregister()