170 drm_dp_dump_access(const struct drm_dp_aux *aux,  in drm_dp_dump_access()  argument
177 			     aux->name, offset, arrow, ret, min(ret, 20), buffer);  in drm_dp_dump_access()
180 			     aux->name, offset, arrow, ret);  in drm_dp_dump_access()
195 static int drm_dp_dpcd_access(struct drm_dp_aux *aux, u8 request,  in drm_dp_dpcd_access()  argument
208 	mutex_lock(&aux->hw_mutex);  in drm_dp_dpcd_access()
222 		ret = aux->transfer(aux, &msg);  in drm_dp_dpcd_access()
248 	mutex_unlock(&aux->hw_mutex);  in drm_dp_dpcd_access()
266 ssize_t drm_dp_dpcd_read(struct drm_dp_aux *aux, unsigned int offset,  in drm_dp_dpcd_read()  argument
283 	ret = drm_dp_dpcd_access(aux, DP_AUX_NATIVE_READ, DP_DPCD_REV, buffer,  in drm_dp_dpcd_read()
288 	ret = drm_dp_dpcd_access(aux, DP_AUX_NATIVE_READ, offset, buffer,  in drm_dp_dpcd_read()
292 	drm_dp_dump_access(aux, DP_AUX_NATIVE_READ, offset, buffer, ret);  in drm_dp_dpcd_read()
311 ssize_t drm_dp_dpcd_write(struct drm_dp_aux *aux, unsigned int offset,  in drm_dp_dpcd_write()  argument
316 	ret = drm_dp_dpcd_access(aux, DP_AUX_NATIVE_WRITE, offset, buffer,  in drm_dp_dpcd_write()
318 	drm_dp_dump_access(aux, DP_AUX_NATIVE_WRITE, offset, buffer, ret);  in drm_dp_dpcd_write()
331 int drm_dp_dpcd_read_link_status(struct drm_dp_aux *aux,  in drm_dp_dpcd_read_link_status()  argument
334 	return drm_dp_dpcd_read(aux, DP_LANE0_1_STATUS, status,  in drm_dp_dpcd_read_link_status()
350 int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link)  in drm_dp_link_probe()  argument
357 	err = drm_dp_dpcd_read(aux, DP_DPCD_REV, values, sizeof(values));  in drm_dp_link_probe()
379 int drm_dp_link_power_up(struct drm_dp_aux *aux, struct drm_dp_link *link)  in drm_dp_link_power_up()  argument
388 	err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);  in drm_dp_link_power_up()
395 	err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);  in drm_dp_link_power_up()
417 int drm_dp_link_power_down(struct drm_dp_aux *aux, struct drm_dp_link *link)  in drm_dp_link_power_down()  argument
426 	err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);  in drm_dp_link_power_down()
433 	err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);  in drm_dp_link_power_down()
448 int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link)  in drm_dp_link_configure()  argument
459 	err = drm_dp_dpcd_write(aux, DP_LINK_BW_SET, values, sizeof(values));  in drm_dp_link_configure()
550 int drm_dp_downstream_id(struct drm_dp_aux *aux, char id[6])  in drm_dp_downstream_id()  argument
552 	return drm_dp_dpcd_read(aux, DP_BRANCH_ID, id, 6);  in drm_dp_downstream_id()
566 			     const u8 port_cap[4], struct drm_dp_aux *aux)  in drm_dp_downstream_debug()  argument
612 	drm_dp_downstream_id(aux, id);  in drm_dp_downstream_debug()
615 	len = drm_dp_dpcd_read(aux, DP_BRANCH_HW_REV, &rev[0], 1);  in drm_dp_downstream_debug()
620 	len = drm_dp_dpcd_read(aux, DP_BRANCH_SW_REV, rev, 2);  in drm_dp_downstream_debug()
759 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
773 		ret = aux->transfer(aux, msg);  in drm_dp_i2c_do_msg()
837 			aux->i2c_nack_count++;  in drm_dp_i2c_do_msg()
846 			aux->i2c_defer_count++;  in drm_dp_i2c_do_msg()
878 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
884 		err = drm_dp_i2c_do_msg(aux, &msg);  in drm_dp_i2c_drain_msg()
914 	struct drm_dp_aux *aux = adapter->algo_data;  in drm_dp_i2c_xfer()  local
933 		err = drm_dp_i2c_do_msg(aux, &msg);  in drm_dp_i2c_xfer()
952 			err = drm_dp_i2c_drain_msg(aux, &msg);  in drm_dp_i2c_xfer()
976 	(void)drm_dp_i2c_do_msg(aux, &msg);  in drm_dp_i2c_xfer()
1012 static int drm_dp_aux_get_crc(struct drm_dp_aux *aux, u8 *crc)  in drm_dp_aux_get_crc()  argument
1017 	ret = drm_dp_dpcd_readb(aux, DP_TEST_SINK, &buf);  in drm_dp_aux_get_crc()
1023 	ret = drm_dp_dpcd_readb(aux, DP_TEST_SINK_MISC, &buf);  in drm_dp_aux_get_crc()
1028 	if (count == aux->crc_count)  in drm_dp_aux_get_crc()
1031 	aux->crc_count = count;  in drm_dp_aux_get_crc()
1037 	ret = drm_dp_dpcd_read(aux, DP_TEST_CRC_R_CR, crc, 6);  in drm_dp_aux_get_crc()
1046 	struct drm_dp_aux *aux = container_of(work, struct drm_dp_aux,  in drm_dp_aux_crc_work()  local
1053 	if (WARN_ON(!aux->crtc))  in drm_dp_aux_crc_work()
1056 	crtc = aux->crtc;  in drm_dp_aux_crc_work()
1062 		ret = drm_dp_aux_get_crc(aux, crc_bytes);  in drm_dp_aux_crc_work()
1065 			ret = drm_dp_aux_get_crc(aux, crc_bytes);  in drm_dp_aux_crc_work()
1093 void drm_dp_aux_init(struct drm_dp_aux *aux)  in drm_dp_aux_init()  argument
1095 	mutex_init(&aux->hw_mutex);  in drm_dp_aux_init()
1096 	mutex_init(&aux->cec.lock);  in drm_dp_aux_init()
1097 	INIT_WORK(&aux->crc_work, drm_dp_aux_crc_work);  in drm_dp_aux_init()
1099 	aux->ddc.algo = &drm_dp_i2c_algo;  in drm_dp_aux_init()
1100 	aux->ddc.algo_data = aux;  in drm_dp_aux_init()
1101 	aux->ddc.retries = 3;  in drm_dp_aux_init()
1103 	aux->ddc.lock_ops = &drm_dp_i2c_lock_ops;  in drm_dp_aux_init()
1115 int drm_dp_aux_register(struct drm_dp_aux *aux)  in drm_dp_aux_register()  argument
1119 	if (!aux->ddc.algo)  in drm_dp_aux_register()
1120 		drm_dp_aux_init(aux);  in drm_dp_aux_register()
1122 	aux->ddc.class = I2C_CLASS_DDC;  in drm_dp_aux_register()
1123 	aux->ddc.owner = THIS_MODULE;  in drm_dp_aux_register()
1124 	aux->ddc.dev.parent = aux->dev;  in drm_dp_aux_register()
1126 	strlcpy(aux->ddc.name, aux->name ? aux->name : dev_name(aux->dev),  in drm_dp_aux_register()
1127 		sizeof(aux->ddc.name));  in drm_dp_aux_register()
1129 	ret = drm_dp_aux_register_devnode(aux);  in drm_dp_aux_register()
1133 	ret = i2c_add_adapter(&aux->ddc);  in drm_dp_aux_register()
1135 		drm_dp_aux_unregister_devnode(aux);  in drm_dp_aux_register()
1147 void drm_dp_aux_unregister(struct drm_dp_aux *aux)  in drm_dp_aux_unregister()  argument
1149 	drm_dp_aux_unregister_devnode(aux);  in drm_dp_aux_unregister()
1150 	i2c_del_adapter(&aux->ddc);  in drm_dp_aux_unregister()
1194 int drm_dp_start_crc(struct drm_dp_aux *aux, struct drm_crtc *crtc)  in drm_dp_start_crc()  argument
1199 	ret = drm_dp_dpcd_readb(aux, DP_TEST_SINK, &buf);  in drm_dp_start_crc()
1203 	ret = drm_dp_dpcd_writeb(aux, DP_TEST_SINK, buf | DP_TEST_SINK_START);  in drm_dp_start_crc()
1207 	aux->crc_count = 0;  in drm_dp_start_crc()
1208 	aux->crtc = crtc;  in drm_dp_start_crc()
1209 	schedule_work(&aux->crc_work);  in drm_dp_start_crc()
1221 int drm_dp_stop_crc(struct drm_dp_aux *aux)  in drm_dp_stop_crc()  argument
1226 	ret = drm_dp_dpcd_readb(aux, DP_TEST_SINK, &buf);  in drm_dp_stop_crc()
1230 	ret = drm_dp_dpcd_writeb(aux, DP_TEST_SINK, buf & ~DP_TEST_SINK_START);  in drm_dp_stop_crc()
1234 	flush_work(&aux->crc_work);  in drm_dp_stop_crc()
1235 	aux->crtc = NULL;  in drm_dp_stop_crc()
1316 int drm_dp_read_desc(struct drm_dp_aux *aux, struct drm_dp_desc *desc,  in drm_dp_read_desc()  argument
1323 	ret = drm_dp_dpcd_read(aux, offset, ident, sizeof(*ident));  in drm_dp_read_desc()