Lines Matching full:aux
60 struct drm_dp_aux *aux; member
69 * levels to deal with Display Port sink devices and related things like DP aux
70 * channel transfers, EDID reading over DP aux channels, decoding certain DPCD
228 static int __8b10b_clock_recovery_delay_us(const struct drm_dp_aux *aux, u8 rd_interval) in __8b10b_clock_recovery_delay_us() argument
231 drm_dbg_kms(aux->drm_dev, "%s: invalid AUX interval 0x%02x (max 4)\n", in __8b10b_clock_recovery_delay_us()
232 aux->name, rd_interval); in __8b10b_clock_recovery_delay_us()
240 static int __8b10b_channel_eq_delay_us(const struct drm_dp_aux *aux, u8 rd_interval) in __8b10b_channel_eq_delay_us() argument
243 drm_dbg_kms(aux->drm_dev, "%s: invalid AUX interval 0x%02x (max 4)\n", in __8b10b_channel_eq_delay_us()
244 aux->name, rd_interval); in __8b10b_channel_eq_delay_us()
252 static int __128b132b_channel_eq_delay_us(const struct drm_dp_aux *aux, u8 rd_interval) in __128b132b_channel_eq_delay_us() argument
256 drm_dbg_kms(aux->drm_dev, "%s: invalid AUX interval 0x%02x\n", in __128b132b_channel_eq_delay_us()
257 aux->name, rd_interval); in __128b132b_channel_eq_delay_us()
286 static int __read_delay(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE], in __read_delay() argument
289 int (*parse)(const struct drm_dp_aux *aux, u8 rd_interval); in __read_delay()
330 if (drm_dp_dpcd_readb(aux, offset, &rd_interval) != 1) { in __read_delay()
331 drm_dbg_kms(aux->drm_dev, "%s: failed rd interval read\n", in __read_delay()
332 aux->name); in __read_delay()
338 return parse(aux, rd_interval & mask); in __read_delay()
341 int drm_dp_read_clock_recovery_delay(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE], in drm_dp_read_clock_recovery_delay() argument
344 return __read_delay(aux, dpcd, dp_phy, uhbr, true); in drm_dp_read_clock_recovery_delay()
348 int drm_dp_read_channel_eq_delay(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE], in drm_dp_read_channel_eq_delay() argument
351 return __read_delay(aux, dpcd, dp_phy, uhbr, false); in drm_dp_read_channel_eq_delay()
356 int drm_dp_128b132b_read_aux_rd_interval(struct drm_dp_aux *aux) in drm_dp_128b132b_read_aux_rd_interval() argument
361 if (drm_dp_dpcd_readb(aux, DP_128B132B_TRAINING_AUX_RD_INTERVAL, &val) != 1) { in drm_dp_128b132b_read_aux_rd_interval()
362 drm_err(aux->drm_dev, "%s: failed rd interval read\n", in drm_dp_128b132b_read_aux_rd_interval()
363 aux->name); in drm_dp_128b132b_read_aux_rd_interval()
375 void drm_dp_link_train_clock_recovery_delay(const struct drm_dp_aux *aux, in drm_dp_link_train_clock_recovery_delay() argument
385 delay_us = __8b10b_clock_recovery_delay_us(aux, rd_interval); in drm_dp_link_train_clock_recovery_delay()
391 static void __drm_dp_link_train_channel_eq_delay(const struct drm_dp_aux *aux, in __drm_dp_link_train_channel_eq_delay() argument
394 int delay_us = __8b10b_channel_eq_delay_us(aux, rd_interval); in __drm_dp_link_train_channel_eq_delay()
399 void drm_dp_link_train_channel_eq_delay(const struct drm_dp_aux *aux, in drm_dp_link_train_channel_eq_delay() argument
402 __drm_dp_link_train_channel_eq_delay(aux, in drm_dp_link_train_channel_eq_delay()
451 void drm_dp_lttpr_link_train_channel_eq_delay(const struct drm_dp_aux *aux, in drm_dp_lttpr_link_train_channel_eq_delay() argument
458 __drm_dp_link_train_channel_eq_delay(aux, interval); in drm_dp_lttpr_link_train_channel_eq_delay()
497 drm_dp_dump_access(const struct drm_dp_aux *aux, in drm_dp_dump_access() argument
503 drm_dbg_dp(aux->drm_dev, "%s: 0x%05x AUX %s (ret=%3d) %*ph\n", in drm_dp_dump_access()
504 aux->name, offset, arrow, ret, min(ret, 20), buffer); in drm_dp_dump_access()
506 drm_dbg_dp(aux->drm_dev, "%s: 0x%05x AUX %s (ret=%3d)\n", in drm_dp_dump_access()
507 aux->name, offset, arrow, ret); in drm_dp_dump_access()
513 * The DisplayPort AUX channel is an abstraction to allow generic, driver-
514 * independent access to AUX functionality. Drivers can take advantage of
519 * Both native and I2C-over-AUX transactions are supported.
522 static int drm_dp_dpcd_access(struct drm_dp_aux *aux, u8 request, in drm_dp_dpcd_access() argument
535 mutex_lock(&aux->hw_mutex); in drm_dp_dpcd_access()
538 * If the device attached to the aux bus is powered down then there's in drm_dp_dpcd_access()
541 if (aux->powered_down) { in drm_dp_dpcd_access()
549 * aux i2c transactions but real world devices this wasn't in drm_dp_dpcd_access()
558 ret = aux->transfer(aux, &msg); in drm_dp_dpcd_access()
579 drm_dbg_kms(aux->drm_dev, "%s: Too many retries, giving up. First error: %d\n", in drm_dp_dpcd_access()
580 aux->name, err); in drm_dp_dpcd_access()
584 mutex_unlock(&aux->hw_mutex); in drm_dp_dpcd_access()
590 * @aux: DisplayPort AUX channel (SST)
599 int drm_dp_dpcd_probe(struct drm_dp_aux *aux, unsigned int offset) in drm_dp_dpcd_probe() argument
604 ret = drm_dp_dpcd_access(aux, DP_AUX_NATIVE_READ, offset, &buffer, 1); in drm_dp_dpcd_probe()
607 drm_dp_dump_access(aux, DP_AUX_NATIVE_READ, offset, &buffer, ret); in drm_dp_dpcd_probe()
615 * @aux: DisplayPort AUX channel; for convenience it's OK to pass NULL here
619 * If the endpoint device on the DP AUX bus is known to be powered down
625 void drm_dp_dpcd_set_powered(struct drm_dp_aux *aux, bool powered) in drm_dp_dpcd_set_powered() argument
627 if (!aux) in drm_dp_dpcd_set_powered()
630 mutex_lock(&aux->hw_mutex); in drm_dp_dpcd_set_powered()
631 aux->powered_down = !powered; in drm_dp_dpcd_set_powered()
632 mutex_unlock(&aux->hw_mutex); in drm_dp_dpcd_set_powered()
638 * @aux: DisplayPort AUX channel (SST or MST)
646 * function returns -EPROTO. Errors from the underlying AUX channel transfer
650 ssize_t drm_dp_dpcd_read(struct drm_dp_aux *aux, unsigned int offset, in drm_dp_dpcd_read() argument
667 if (!aux->is_remote) { in drm_dp_dpcd_read()
668 ret = drm_dp_dpcd_probe(aux, DP_DPCD_REV); in drm_dp_dpcd_read()
673 if (aux->is_remote) in drm_dp_dpcd_read()
674 ret = drm_dp_mst_dpcd_read(aux, offset, buffer, size); in drm_dp_dpcd_read()
676 ret = drm_dp_dpcd_access(aux, DP_AUX_NATIVE_READ, offset, in drm_dp_dpcd_read()
679 drm_dp_dump_access(aux, DP_AUX_NATIVE_READ, offset, buffer, ret); in drm_dp_dpcd_read()
686 * @aux: DisplayPort AUX channel (SST or MST)
694 * function returns -EPROTO. Errors from the underlying AUX channel transfer
698 ssize_t drm_dp_dpcd_write(struct drm_dp_aux *aux, unsigned int offset, in drm_dp_dpcd_write() argument
703 if (aux->is_remote) in drm_dp_dpcd_write()
704 ret = drm_dp_mst_dpcd_write(aux, offset, buffer, size); in drm_dp_dpcd_write()
706 ret = drm_dp_dpcd_access(aux, DP_AUX_NATIVE_WRITE, offset, in drm_dp_dpcd_write()
709 drm_dp_dump_access(aux, DP_AUX_NATIVE_WRITE, offset, buffer, ret); in drm_dp_dpcd_write()
716 * @aux: DisplayPort AUX channel
722 int drm_dp_dpcd_read_link_status(struct drm_dp_aux *aux, in drm_dp_dpcd_read_link_status() argument
725 return drm_dp_dpcd_read(aux, DP_LANE0_1_STATUS, status, in drm_dp_dpcd_read_link_status()
732 * @aux: DisplayPort AUX channel
736 * Fetch the AUX DPCD registers for the DPRX or an LTTPR PHY link status. The
743 int drm_dp_dpcd_read_phy_link_status(struct drm_dp_aux *aux, in drm_dp_dpcd_read_phy_link_status() argument
750 ret = drm_dp_dpcd_read(aux, in drm_dp_dpcd_read_phy_link_status()
763 ret = drm_dp_dpcd_read(aux, in drm_dp_dpcd_read_phy_link_status()
783 static int read_payload_update_status(struct drm_dp_aux *aux) in read_payload_update_status() argument
788 ret = drm_dp_dpcd_readb(aux, DP_PAYLOAD_TABLE_UPDATE_STATUS, &status); in read_payload_update_status()
797 * @aux: DisplayPort AUX channel
808 int drm_dp_dpcd_write_payload(struct drm_dp_aux *aux, in drm_dp_dpcd_write_payload() argument
815 drm_dp_dpcd_writeb(aux, DP_PAYLOAD_TABLE_UPDATE_STATUS, in drm_dp_dpcd_write_payload()
822 ret = drm_dp_dpcd_write(aux, DP_PAYLOAD_ALLOCATE_SET, payload_alloc, 3); in drm_dp_dpcd_write_payload()
824 drm_dbg_kms(aux->drm_dev, "failed to write payload allocation %d\n", ret); in drm_dp_dpcd_write_payload()
829 ret = drm_dp_dpcd_readb(aux, DP_PAYLOAD_TABLE_UPDATE_STATUS, &status); in drm_dp_dpcd_write_payload()
831 drm_dbg_kms(aux->drm_dev, "failed to read payload table status %d\n", ret); in drm_dp_dpcd_write_payload()
841 drm_dbg_kms(aux->drm_dev, "status not set after read payload table status %d\n", in drm_dp_dpcd_write_payload()
854 * @aux: DisplayPort AUX channel
860 int drm_dp_dpcd_clear_payload(struct drm_dp_aux *aux) in drm_dp_dpcd_clear_payload() argument
862 return drm_dp_dpcd_write_payload(aux, 0, 0, 0x3f); in drm_dp_dpcd_clear_payload()
868 * @aux: DisplayPort AUX channel
878 int drm_dp_dpcd_poll_act_handled(struct drm_dp_aux *aux, int timeout_ms) in drm_dp_dpcd_poll_act_handled() argument
885 ret = readx_poll_timeout(read_payload_update_status, aux, status, in drm_dp_dpcd_poll_act_handled()
889 drm_err(aux->drm_dev, "Failed to get ACT after %d ms, last status: %02x\n", in drm_dp_dpcd_poll_act_handled()
897 drm_dbg_kms(aux->drm_dev, "Failed to read payload table status: %d\n", status); in drm_dp_dpcd_poll_act_handled()
974 * @aux: DisplayPort AUX channel
980 bool drm_dp_send_real_edid_checksum(struct drm_dp_aux *aux, in drm_dp_send_real_edid_checksum() argument
985 if (drm_dp_dpcd_read(aux, DP_DEVICE_SERVICE_IRQ_VECTOR, in drm_dp_send_real_edid_checksum()
987 drm_err(aux->drm_dev, "%s: DPCD failed read at register 0x%x\n", in drm_dp_send_real_edid_checksum()
988 aux->name, DP_DEVICE_SERVICE_IRQ_VECTOR); in drm_dp_send_real_edid_checksum()
993 if (drm_dp_dpcd_read(aux, DP_TEST_REQUEST, &link_edid_read, 1) < 1) { in drm_dp_send_real_edid_checksum()
994 drm_err(aux->drm_dev, "%s: DPCD failed read at register 0x%x\n", in drm_dp_send_real_edid_checksum()
995 aux->name, DP_TEST_REQUEST); in drm_dp_send_real_edid_checksum()
1001 drm_dbg_kms(aux->drm_dev, "%s: Source DUT does not support TEST_EDID_READ\n", in drm_dp_send_real_edid_checksum()
1002 aux->name); in drm_dp_send_real_edid_checksum()
1006 if (drm_dp_dpcd_write(aux, DP_DEVICE_SERVICE_IRQ_VECTOR, in drm_dp_send_real_edid_checksum()
1008 drm_err(aux->drm_dev, "%s: DPCD failed write at register 0x%x\n", in drm_dp_send_real_edid_checksum()
1009 aux->name, DP_DEVICE_SERVICE_IRQ_VECTOR); in drm_dp_send_real_edid_checksum()
1014 if (drm_dp_dpcd_write(aux, DP_TEST_EDID_CHECKSUM, in drm_dp_send_real_edid_checksum()
1016 drm_err(aux->drm_dev, "%s: DPCD failed write at register 0x%x\n", in drm_dp_send_real_edid_checksum()
1017 aux->name, DP_TEST_EDID_CHECKSUM); in drm_dp_send_real_edid_checksum()
1022 if (drm_dp_dpcd_write(aux, DP_TEST_RESPONSE, &test_resp, 1) < 1) { in drm_dp_send_real_edid_checksum()
1023 drm_err(aux->drm_dev, "%s: DPCD failed write at register 0x%x\n", in drm_dp_send_real_edid_checksum()
1024 aux->name, DP_TEST_RESPONSE); in drm_dp_send_real_edid_checksum()
1042 static int drm_dp_read_extended_dpcd_caps(struct drm_dp_aux *aux, in drm_dp_read_extended_dpcd_caps() argument
1059 ret = drm_dp_dpcd_read(aux, DP_DP13_DPCD_REV, &dpcd_ext, in drm_dp_read_extended_dpcd_caps()
1067 drm_dbg_kms(aux->drm_dev, in drm_dp_read_extended_dpcd_caps()
1069 aux->name, dpcd[DP_DPCD_REV], dpcd_ext[DP_DPCD_REV]); in drm_dp_read_extended_dpcd_caps()
1076 drm_dbg_kms(aux->drm_dev, "%s: Base DPCD: %*ph\n", aux->name, DP_RECEIVER_CAP_SIZE, dpcd); in drm_dp_read_extended_dpcd_caps()
1086 * @aux: DisplayPort AUX channel
1089 * Attempts to read the base DPCD caps for @aux. Additionally, this function
1096 int drm_dp_read_dpcd_caps(struct drm_dp_aux *aux, in drm_dp_read_dpcd_caps() argument
1101 ret = drm_dp_dpcd_read(aux, DP_DPCD_REV, dpcd, DP_RECEIVER_CAP_SIZE); in drm_dp_read_dpcd_caps()
1107 ret = drm_dp_read_extended_dpcd_caps(aux, dpcd); in drm_dp_read_dpcd_caps()
1111 drm_dbg_kms(aux->drm_dev, "%s: DPCD: %*ph\n", aux->name, DP_RECEIVER_CAP_SIZE, dpcd); in drm_dp_read_dpcd_caps()
1119 * @aux: DisplayPort AUX channel
1130 int drm_dp_read_downstream_info(struct drm_dp_aux *aux, in drm_dp_read_downstream_info() argument
1154 ret = drm_dp_dpcd_read(aux, DP_DOWNSTREAM_PORT_0, downstream_ports, len); in drm_dp_read_downstream_info()
1160 drm_dbg_kms(aux->drm_dev, "%s: DPCD DFP: %*ph\n", aux->name, len, downstream_ports); in drm_dp_read_downstream_info()
1508 * @aux: DisplayPort AUX channel
1513 int drm_dp_downstream_id(struct drm_dp_aux *aux, char id[6]) in drm_dp_downstream_id() argument
1515 return drm_dp_dpcd_read(aux, DP_BRANCH_ID, id, 6); in drm_dp_downstream_id()
1525 * @aux: DisplayPort AUX channel
1532 struct drm_dp_aux *aux) in drm_dp_downstream_debug() argument
1577 drm_dp_downstream_id(aux, id); in drm_dp_downstream_debug()
1580 len = drm_dp_dpcd_read(aux, DP_BRANCH_HW_REV, &rev[0], 1); in drm_dp_downstream_debug()
1585 len = drm_dp_dpcd_read(aux, DP_BRANCH_SW_REV, rev, 2); in drm_dp_downstream_debug()
1712 * @aux: The DP AUX channel to use
1716 * Returns: The current sink count reported by @aux, or a negative error code
1719 int drm_dp_read_sink_count(struct drm_dp_aux *aux) in drm_dp_read_sink_count() argument
1724 ret = drm_dp_dpcd_readb(aux, DP_SINK_COUNT, &count); in drm_dp_read_sink_count()
1735 * I2C-over-AUX implementation
1768 * Calculate the duration of the AUX request/reply in usec. Gives the
1813 /* AUX bitrate is 1MHz, i2c bitrate as specified */ in drm_dp_i2c_msg_duration()
1822 * i2c and AUX transfers.
1844 * Transfer a single I2C-over-AUX message and handle various error conditions,
1851 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
1858 * before giving up the AUX transaction. in drm_dp_i2c_do_msg()
1865 ret = aux->transfer(aux, msg); in drm_dp_i2c_do_msg()
1877 drm_dbg_kms_ratelimited(aux->drm_dev, "%s: transaction timed out\n", in drm_dp_i2c_do_msg()
1878 aux->name); in drm_dp_i2c_do_msg()
1880 drm_dbg_kms(aux->drm_dev, "%s: transaction failed: %d\n", in drm_dp_i2c_do_msg()
1881 aux->name, ret); in drm_dp_i2c_do_msg()
1889 * For I2C-over-AUX transactions this isn't enough, we in drm_dp_i2c_do_msg()
1895 drm_dbg_kms(aux->drm_dev, "%s: native nack (result=%d, size=%zu)\n", in drm_dp_i2c_do_msg()
1896 aux->name, ret, msg->size); in drm_dp_i2c_do_msg()
1900 drm_dbg_kms(aux->drm_dev, "%s: native defer\n", aux->name); in drm_dp_i2c_do_msg()
1914 drm_err(aux->drm_dev, "%s: invalid native reply %#04x\n", in drm_dp_i2c_do_msg()
1915 aux->name, msg->reply); in drm_dp_i2c_do_msg()
1930 drm_dbg_kms(aux->drm_dev, "%s: I2C nack (result=%d, size=%zu)\n", in drm_dp_i2c_do_msg()
1931 aux->name, ret, msg->size); in drm_dp_i2c_do_msg()
1932 aux->i2c_nack_count++; in drm_dp_i2c_do_msg()
1936 drm_dbg_kms(aux->drm_dev, "%s: I2C defer\n", aux->name); in drm_dp_i2c_do_msg()
1941 aux->i2c_defer_count++; in drm_dp_i2c_do_msg()
1950 drm_err(aux->drm_dev, "%s: invalid I2C reply %#04x\n", in drm_dp_i2c_do_msg()
1951 aux->name, msg->reply); in drm_dp_i2c_do_msg()
1956 drm_dbg_kms(aux->drm_dev, "%s: Too many retries, giving up\n", aux->name); in drm_dp_i2c_do_msg()
1974 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
1980 err = drm_dp_i2c_do_msg(aux, &msg); in drm_dp_i2c_drain_msg()
1985 drm_dbg_kms(aux->drm_dev, in drm_dp_i2c_drain_msg()
1987 aux->name, msg.size, err); in drm_dp_i2c_drain_msg()
1999 * Bizlink designed DP->DVI-D Dual Link adapters require the I2C over AUX
2006 "Number of bytes to transfer in a single I2C over DP AUX CH message, (1-16, default 16)");
2011 struct drm_dp_aux *aux = adapter->algo_data; in drm_dp_i2c_xfer() local
2017 if (aux->powered_down) in drm_dp_i2c_xfer()
2033 err = drm_dp_i2c_do_msg(aux, &msg); in drm_dp_i2c_xfer()
2052 err = drm_dp_i2c_drain_msg(aux, &msg); in drm_dp_i2c_xfer()
2076 (void)drm_dp_i2c_do_msg(aux, &msg); in drm_dp_i2c_xfer()
2112 static int drm_dp_aux_get_crc(struct drm_dp_aux *aux, u8 *crc) in drm_dp_aux_get_crc() argument
2117 ret = drm_dp_dpcd_readb(aux, DP_TEST_SINK, &buf); in drm_dp_aux_get_crc()
2123 ret = drm_dp_dpcd_readb(aux, DP_TEST_SINK_MISC, &buf); in drm_dp_aux_get_crc()
2128 if (count == aux->crc_count) in drm_dp_aux_get_crc()
2131 aux->crc_count = count; in drm_dp_aux_get_crc()
2137 ret = drm_dp_dpcd_read(aux, DP_TEST_CRC_R_CR, crc, 6); in drm_dp_aux_get_crc()
2146 struct drm_dp_aux *aux = container_of(work, struct drm_dp_aux, in drm_dp_aux_crc_work() local
2153 if (WARN_ON(!aux->crtc)) in drm_dp_aux_crc_work()
2156 crtc = aux->crtc; in drm_dp_aux_crc_work()
2162 ret = drm_dp_aux_get_crc(aux, crc_bytes); in drm_dp_aux_crc_work()
2165 ret = drm_dp_aux_get_crc(aux, crc_bytes); in drm_dp_aux_crc_work()
2169 drm_dbg_kms(aux->drm_dev, "%s: Get CRC failed after retrying: %d\n", in drm_dp_aux_crc_work()
2170 aux->name, ret); in drm_dp_aux_crc_work()
2173 drm_dbg_kms(aux->drm_dev, "%s: Failed to get a CRC: %d\n", aux->name, ret); in drm_dp_aux_crc_work()
2185 * drm_dp_remote_aux_init() - minimally initialise a remote aux channel
2186 * @aux: DisplayPort AUX channel
2188 * Used for remote aux channel in general. Merely initialize the crc work
2191 void drm_dp_remote_aux_init(struct drm_dp_aux *aux) in drm_dp_remote_aux_init() argument
2193 INIT_WORK(&aux->crc_work, drm_dp_aux_crc_work); in drm_dp_remote_aux_init()
2198 * drm_dp_aux_init() - minimally initialise an aux channel
2199 * @aux: DisplayPort AUX channel
2203 * grandparents to their AUX adapters (e.g. the AUX adapter is parented by a
2207 * early as possible so that the &drm_device that corresponds to the AUX adapter
2210 * For devices which use a separate platform device for their AUX adapters, this
2214 void drm_dp_aux_init(struct drm_dp_aux *aux) in drm_dp_aux_init() argument
2216 mutex_init(&aux->hw_mutex); in drm_dp_aux_init()
2217 mutex_init(&aux->cec.lock); in drm_dp_aux_init()
2218 INIT_WORK(&aux->crc_work, drm_dp_aux_crc_work); in drm_dp_aux_init()
2220 aux->ddc.algo = &drm_dp_i2c_algo; in drm_dp_aux_init()
2221 aux->ddc.algo_data = aux; in drm_dp_aux_init()
2222 aux->ddc.retries = 3; in drm_dp_aux_init()
2224 aux->ddc.lock_ops = &drm_dp_i2c_lock_ops; in drm_dp_aux_init()
2229 * drm_dp_aux_register() - initialise and register aux channel
2230 * @aux: DisplayPort AUX channel
2233 * should only be called once the parent of @aux, &drm_dp_aux.dev, is
2234 * initialized. For devices which are grandparents of their AUX channels,
2236 * corresponds to @aux. For these devices, it's advised to call
2242 * For devices where the AUX channel is a device that exists independently of
2247 * with the AUX channel (e.g. on bridge detach).
2249 * Drivers which need to use the aux channel before either of the two points
2250 * mentioned above need to call drm_dp_aux_init() in order to use the AUX
2255 int drm_dp_aux_register(struct drm_dp_aux *aux) in drm_dp_aux_register() argument
2259 WARN_ON_ONCE(!aux->drm_dev); in drm_dp_aux_register()
2261 if (!aux->ddc.algo) in drm_dp_aux_register()
2262 drm_dp_aux_init(aux); in drm_dp_aux_register()
2264 aux->ddc.owner = THIS_MODULE; in drm_dp_aux_register()
2265 aux->ddc.dev.parent = aux->dev; in drm_dp_aux_register()
2267 strscpy(aux->ddc.name, aux->name ? aux->name : dev_name(aux->dev), in drm_dp_aux_register()
2268 sizeof(aux->ddc.name)); in drm_dp_aux_register()
2270 ret = drm_dp_aux_register_devnode(aux); in drm_dp_aux_register()
2274 ret = i2c_add_adapter(&aux->ddc); in drm_dp_aux_register()
2276 drm_dp_aux_unregister_devnode(aux); in drm_dp_aux_register()
2285 * drm_dp_aux_unregister() - unregister an AUX adapter
2286 * @aux: DisplayPort AUX channel
2288 void drm_dp_aux_unregister(struct drm_dp_aux *aux) in drm_dp_aux_unregister() argument
2290 drm_dp_aux_unregister_devnode(aux); in drm_dp_aux_unregister()
2291 i2c_del_adapter(&aux->ddc); in drm_dp_aux_unregister()
2330 * @aux: DisplayPort AUX channel
2335 int drm_dp_start_crc(struct drm_dp_aux *aux, struct drm_crtc *crtc) in drm_dp_start_crc() argument
2340 ret = drm_dp_dpcd_readb(aux, DP_TEST_SINK, &buf); in drm_dp_start_crc()
2344 ret = drm_dp_dpcd_writeb(aux, DP_TEST_SINK, buf | DP_TEST_SINK_START); in drm_dp_start_crc()
2348 aux->crc_count = 0; in drm_dp_start_crc()
2349 aux->crtc = crtc; in drm_dp_start_crc()
2350 schedule_work(&aux->crc_work); in drm_dp_start_crc()
2358 * @aux: DisplayPort AUX channel
2362 int drm_dp_stop_crc(struct drm_dp_aux *aux) in drm_dp_stop_crc() argument
2367 ret = drm_dp_dpcd_readb(aux, DP_TEST_SINK, &buf); in drm_dp_stop_crc()
2371 ret = drm_dp_dpcd_writeb(aux, DP_TEST_SINK, buf & ~DP_TEST_SINK_START); in drm_dp_stop_crc()
2375 flush_work(&aux->crc_work); in drm_dp_stop_crc()
2376 aux->crtc = NULL; in drm_dp_stop_crc()
2454 static int drm_dp_read_ident(struct drm_dp_aux *aux, unsigned int offset, in drm_dp_read_ident() argument
2459 ret = drm_dp_dpcd_read(aux, offset, ident, sizeof(*ident)); in drm_dp_read_ident()
2464 static void drm_dp_dump_desc(struct drm_dp_aux *aux, in drm_dp_dump_desc() argument
2469 drm_dbg_kms(aux->drm_dev, in drm_dp_dump_desc()
2471 aux->name, device_name, in drm_dp_dump_desc()
2481 * @aux: DisplayPort AUX channel
2490 int drm_dp_read_desc(struct drm_dp_aux *aux, struct drm_dp_desc *desc, in drm_dp_read_desc() argument
2497 ret = drm_dp_read_ident(aux, offset, ident); in drm_dp_read_desc()
2503 drm_dp_dump_desc(aux, is_branch ? "DP branch" : "DP sink", desc); in drm_dp_read_desc()
2511 * @aux: DisplayPort AUX channel
2519 int drm_dp_dump_lttpr_desc(struct drm_dp_aux *aux, enum drm_dp_phy dp_phy) in drm_dp_dump_lttpr_desc() argument
2524 if (drm_WARN_ON(aux->drm_dev, dp_phy < DP_PHY_LTTPR1 || dp_phy > DP_MAX_LTTPR_COUNT)) in drm_dp_dump_lttpr_desc()
2527 ret = drm_dp_read_ident(aux, DP_OUI_PHY_REPEATER(dp_phy), &desc.ident); in drm_dp_dump_lttpr_desc()
2531 drm_dp_dump_desc(aux, drm_dp_phy_name(dp_phy), &desc); in drm_dp_dump_lttpr_desc()
2705 static int drm_dp_read_lttpr_regs(struct drm_dp_aux *aux, in drm_dp_read_lttpr_regs() argument
2719 ret = drm_dp_dpcd_read(aux, in drm_dp_read_lttpr_regs()
2733 * @aux: DisplayPort AUX channel
2741 int drm_dp_read_lttpr_common_caps(struct drm_dp_aux *aux, in drm_dp_read_lttpr_common_caps() argument
2745 return drm_dp_read_lttpr_regs(aux, dpcd, in drm_dp_read_lttpr_common_caps()
2753 * @aux: DisplayPort AUX channel
2762 int drm_dp_read_lttpr_phy_caps(struct drm_dp_aux *aux, in drm_dp_read_lttpr_phy_caps() argument
2767 return drm_dp_read_lttpr_regs(aux, dpcd, in drm_dp_read_lttpr_phy_caps()
2868 * @aux: DisplayPort AUX channel
2873 int drm_dp_get_phy_test_pattern(struct drm_dp_aux *aux, in drm_dp_get_phy_test_pattern() argument
2879 err = drm_dp_dpcd_readb(aux, DP_TEST_LINK_RATE, &rate); in drm_dp_get_phy_test_pattern()
2884 err = drm_dp_dpcd_readb(aux, DP_TEST_LANE_COUNT, &lanes); in drm_dp_get_phy_test_pattern()
2892 err = drm_dp_dpcd_readb(aux, DP_PHY_TEST_PATTERN, &data->phy_pattern); in drm_dp_get_phy_test_pattern()
2898 err = drm_dp_dpcd_read(aux, DP_TEST_80BIT_CUSTOM_PATTERN_7_0, in drm_dp_get_phy_test_pattern()
2905 err = drm_dp_dpcd_read(aux, DP_TEST_HBR2_SCRAMBLER_RESET, in drm_dp_get_phy_test_pattern()
2918 * @aux: DisplayPort AUX channel
2924 int drm_dp_set_phy_test_pattern(struct drm_dp_aux *aux, in drm_dp_set_phy_test_pattern() argument
2934 err = drm_dp_dpcd_writeb(aux, DP_TRAINING_PATTERN_SET, in drm_dp_set_phy_test_pattern()
2940 err = drm_dp_dpcd_writeb(aux, in drm_dp_set_phy_test_pattern()
3137 * @aux: DisplayPort AUX channel
3142 bool drm_dp_as_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]) in drm_dp_as_sdp_supported() argument
3149 if (drm_dp_dpcd_readb(aux, DP_DPRX_FEATURE_ENUMERATION_LIST_CONT_1, in drm_dp_as_sdp_supported()
3151 drm_dbg_dp(aux->drm_dev, in drm_dp_as_sdp_supported()
3162 * @aux: DisplayPort AUX channel
3167 bool drm_dp_vsc_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]) in drm_dp_vsc_sdp_supported() argument
3174 if (drm_dp_dpcd_readb(aux, DP_DPRX_FEATURE_ENUMERATION_LIST, &rx_feature) != 1) { in drm_dp_vsc_sdp_supported()
3175 drm_dbg_dp(aux->drm_dev, "failed to read DP_DPRX_FEATURE_ENUMERATION_LIST\n"); in drm_dp_vsc_sdp_supported()
3298 * @aux: DisplayPort AUX channel
3303 int drm_dp_pcon_frl_prepare(struct drm_dp_aux *aux, bool enable_frl_ready_hpd) in drm_dp_pcon_frl_prepare() argument
3312 ret = drm_dp_dpcd_writeb(aux, DP_PCON_HDMI_LINK_CONFIG_1, buf); in drm_dp_pcon_frl_prepare()
3320 * @aux: DisplayPort AUX channel
3324 bool drm_dp_pcon_is_frl_ready(struct drm_dp_aux *aux) in drm_dp_pcon_is_frl_ready() argument
3329 ret = drm_dp_dpcd_readb(aux, DP_PCON_HDMI_TX_LINK_STATUS, &buf); in drm_dp_pcon_is_frl_ready()
3342 * @aux: DisplayPort AUX channel
3352 int drm_dp_pcon_frl_configure_1(struct drm_dp_aux *aux, int max_frl_gbps, in drm_dp_pcon_frl_configure_1() argument
3358 ret = drm_dp_dpcd_readb(aux, DP_PCON_HDMI_LINK_CONFIG_1, &buf); in drm_dp_pcon_frl_configure_1()
3393 ret = drm_dp_dpcd_writeb(aux, DP_PCON_HDMI_LINK_CONFIG_1, buf); in drm_dp_pcon_frl_configure_1()
3403 * @aux: DisplayPort AUX channel
3412 int drm_dp_pcon_frl_configure_2(struct drm_dp_aux *aux, int max_frl_mask, in drm_dp_pcon_frl_configure_2() argument
3423 ret = drm_dp_dpcd_writeb(aux, DP_PCON_HDMI_LINK_CONFIG_2, buf); in drm_dp_pcon_frl_configure_2()
3433 * @aux: DisplayPort AUX channel
3437 int drm_dp_pcon_reset_frl_config(struct drm_dp_aux *aux) in drm_dp_pcon_reset_frl_config() argument
3441 ret = drm_dp_dpcd_writeb(aux, DP_PCON_HDMI_LINK_CONFIG_1, 0x0); in drm_dp_pcon_reset_frl_config()
3451 * @aux: DisplayPort AUX channel
3455 int drm_dp_pcon_frl_enable(struct drm_dp_aux *aux) in drm_dp_pcon_frl_enable() argument
3460 ret = drm_dp_dpcd_readb(aux, DP_PCON_HDMI_LINK_CONFIG_1, &buf); in drm_dp_pcon_frl_enable()
3464 drm_dbg_kms(aux->drm_dev, "%s: PCON in Autonomous mode, can't enable FRL\n", in drm_dp_pcon_frl_enable()
3465 aux->name); in drm_dp_pcon_frl_enable()
3469 ret = drm_dp_dpcd_writeb(aux, DP_PCON_HDMI_LINK_CONFIG_1, buf); in drm_dp_pcon_frl_enable()
3479 * @aux: DisplayPort AUX channel
3483 bool drm_dp_pcon_hdmi_link_active(struct drm_dp_aux *aux) in drm_dp_pcon_hdmi_link_active() argument
3488 ret = drm_dp_dpcd_readb(aux, DP_PCON_HDMI_TX_LINK_STATUS, &buf); in drm_dp_pcon_hdmi_link_active()
3498 * @aux: DisplayPort AUX channel
3507 int drm_dp_pcon_hdmi_link_mode(struct drm_dp_aux *aux, u8 *frl_trained_mask) in drm_dp_pcon_hdmi_link_mode() argument
3513 ret = drm_dp_dpcd_readb(aux, DP_PCON_HDMI_POST_FRL_STATUS, &buf); in drm_dp_pcon_hdmi_link_mode()
3529 * @aux: DisplayPort AUX channel
3534 void drm_dp_pcon_hdmi_frl_link_error_count(struct drm_dp_aux *aux, in drm_dp_pcon_hdmi_frl_link_error_count() argument
3542 if (drm_dp_dpcd_readb(aux, DP_PCON_HDMI_ERROR_STATUS_LN0 + i, &buf) < 0) in drm_dp_pcon_hdmi_frl_link_error_count()
3560 drm_err(aux->drm_dev, "%s: More than %d errors since the last read for lane %d", in drm_dp_pcon_hdmi_frl_link_error_count()
3561 aux->name, num_error, i); in drm_dp_pcon_hdmi_frl_link_error_count()
3672 int drm_dp_pcon_configure_dsc_enc(struct drm_dp_aux *aux, u8 pps_buf_config) in drm_dp_pcon_configure_dsc_enc() argument
3677 ret = drm_dp_dpcd_readb(aux, DP_PROTOCOL_CONVERTER_CONTROL_2, &buf); in drm_dp_pcon_configure_dsc_enc()
3688 ret = drm_dp_dpcd_writeb(aux, DP_PROTOCOL_CONVERTER_CONTROL_2, buf); in drm_dp_pcon_configure_dsc_enc()
3698 * @aux: DisplayPort AUX channel
3702 int drm_dp_pcon_pps_default(struct drm_dp_aux *aux) in drm_dp_pcon_pps_default() argument
3706 ret = drm_dp_pcon_configure_dsc_enc(aux, DP_PCON_ENC_PPS_OVERRIDE_DISABLED); in drm_dp_pcon_pps_default()
3717 * @aux: DisplayPort AUX channel
3722 int drm_dp_pcon_pps_override_buf(struct drm_dp_aux *aux, u8 pps_buf[128]) in drm_dp_pcon_pps_override_buf() argument
3726 ret = drm_dp_dpcd_write(aux, DP_PCON_HDMI_PPS_OVERRIDE_BASE, &pps_buf, 128); in drm_dp_pcon_pps_override_buf()
3730 ret = drm_dp_pcon_configure_dsc_enc(aux, DP_PCON_ENC_PPS_OVERRIDE_EN_BUFFER); in drm_dp_pcon_pps_override_buf()
3741 * @aux: DisplayPort AUX channel
3747 int drm_dp_pcon_pps_override_param(struct drm_dp_aux *aux, u8 pps_param[6]) in drm_dp_pcon_pps_override_param() argument
3751 ret = drm_dp_dpcd_write(aux, DP_PCON_HDMI_PPS_OVRD_SLICE_HEIGHT, &pps_param[0], 2); in drm_dp_pcon_pps_override_param()
3754 ret = drm_dp_dpcd_write(aux, DP_PCON_HDMI_PPS_OVRD_SLICE_WIDTH, &pps_param[2], 2); in drm_dp_pcon_pps_override_param()
3757 ret = drm_dp_dpcd_write(aux, DP_PCON_HDMI_PPS_OVRD_BPP, &pps_param[4], 2); in drm_dp_pcon_pps_override_param()
3761 ret = drm_dp_pcon_configure_dsc_enc(aux, DP_PCON_ENC_PPS_OVERRIDE_EN_BUFFER); in drm_dp_pcon_pps_override_param()
3771 * @aux: displayPort AUX channel
3776 int drm_dp_pcon_convert_rgb_to_ycbcr(struct drm_dp_aux *aux, u8 color_spc) in drm_dp_pcon_convert_rgb_to_ycbcr() argument
3781 ret = drm_dp_dpcd_readb(aux, DP_PROTOCOL_CONVERTER_CONTROL_2, &buf); in drm_dp_pcon_convert_rgb_to_ycbcr()
3790 ret = drm_dp_dpcd_writeb(aux, DP_PROTOCOL_CONVERTER_CONTROL_2, buf); in drm_dp_pcon_convert_rgb_to_ycbcr()
3799 * drm_edp_backlight_set_level() - Set the backlight level of an eDP panel via AUX
3800 * @aux: The DP AUX channel to use
3809 int drm_edp_backlight_set_level(struct drm_dp_aux *aux, const struct drm_edp_backlight_info *bl, in drm_edp_backlight_set_level() argument
3826 ret = drm_dp_dpcd_write(aux, DP_EDP_BACKLIGHT_BRIGHTNESS_MSB, buf, sizeof(buf)); in drm_edp_backlight_set_level()
3828 drm_err(aux->drm_dev, in drm_edp_backlight_set_level()
3829 "%s: Failed to write aux backlight level: %d\n", in drm_edp_backlight_set_level()
3830 aux->name, ret); in drm_edp_backlight_set_level()
3839 drm_edp_backlight_set_enable(struct drm_dp_aux *aux, const struct drm_edp_backlight_info *bl, in drm_edp_backlight_set_enable() argument
3849 ret = drm_dp_dpcd_readb(aux, DP_EDP_DISPLAY_CONTROL_REGISTER, &buf); in drm_edp_backlight_set_enable()
3851 drm_err(aux->drm_dev, "%s: Failed to read eDP display control register: %d\n", in drm_edp_backlight_set_enable()
3852 aux->name, ret); in drm_edp_backlight_set_enable()
3860 ret = drm_dp_dpcd_writeb(aux, DP_EDP_DISPLAY_CONTROL_REGISTER, buf); in drm_edp_backlight_set_enable()
3862 drm_err(aux->drm_dev, "%s: Failed to write eDP display control register: %d\n", in drm_edp_backlight_set_enable()
3863 aux->name, ret); in drm_edp_backlight_set_enable()
3872 * @aux: The DP AUX channel to use
3874 * @level: The initial backlight level to set via AUX, if there is one
3888 int drm_edp_backlight_enable(struct drm_dp_aux *aux, const struct drm_edp_backlight_info *bl, in drm_edp_backlight_enable() argument
3900 ret = drm_dp_dpcd_writeb(aux, DP_EDP_PWMGEN_BIT_COUNT, bl->pwmgen_bit_count); in drm_edp_backlight_enable()
3902 drm_dbg_kms(aux->drm_dev, "%s: Failed to write aux pwmgen bit count: %d\n", in drm_edp_backlight_enable()
3903 aux->name, ret); in drm_edp_backlight_enable()
3907 ret = drm_dp_dpcd_writeb(aux, DP_EDP_BACKLIGHT_FREQ_SET, bl->pwm_freq_pre_divider); in drm_edp_backlight_enable()
3909 drm_dbg_kms(aux->drm_dev, in drm_edp_backlight_enable()
3910 "%s: Failed to write aux backlight frequency: %d\n", in drm_edp_backlight_enable()
3911 aux->name, ret); in drm_edp_backlight_enable()
3916 ret = drm_dp_dpcd_writeb(aux, DP_EDP_BACKLIGHT_MODE_SET_REGISTER, dpcd_buf); in drm_edp_backlight_enable()
3918 drm_dbg_kms(aux->drm_dev, "%s: Failed to write aux backlight mode: %d\n", in drm_edp_backlight_enable()
3919 aux->name, ret); in drm_edp_backlight_enable()
3923 ret = drm_edp_backlight_set_level(aux, bl, level); in drm_edp_backlight_enable()
3926 ret = drm_edp_backlight_set_enable(aux, bl, true); in drm_edp_backlight_enable()
3936 * @aux: The DP AUX channel to use
3939 * This function handles disabling DPCD backlight controls on a panel over AUX.
3949 int drm_edp_backlight_disable(struct drm_dp_aux *aux, const struct drm_edp_backlight_info *bl) in drm_edp_backlight_disable() argument
3953 ret = drm_edp_backlight_set_enable(aux, bl, false); in drm_edp_backlight_disable()
3962 drm_edp_backlight_probe_max(struct drm_dp_aux *aux, struct drm_edp_backlight_info *bl, in drm_edp_backlight_probe_max() argument
3972 ret = drm_dp_dpcd_readb(aux, DP_EDP_PWMGEN_BIT_COUNT, &pn); in drm_edp_backlight_probe_max()
3974 drm_dbg_kms(aux->drm_dev, "%s: Failed to read pwmgen bit count cap: %d\n", in drm_edp_backlight_probe_max()
3975 aux->name, ret); in drm_edp_backlight_probe_max()
4006 ret = drm_dp_dpcd_readb(aux, DP_EDP_PWMGEN_BIT_COUNT_CAP_MIN, &pn_min); in drm_edp_backlight_probe_max()
4008 drm_dbg_kms(aux->drm_dev, "%s: Failed to read pwmgen bit count cap min: %d\n", in drm_edp_backlight_probe_max()
4009 aux->name, ret); in drm_edp_backlight_probe_max()
4012 ret = drm_dp_dpcd_readb(aux, DP_EDP_PWMGEN_BIT_COUNT_CAP_MAX, &pn_max); in drm_edp_backlight_probe_max()
4014 drm_dbg_kms(aux->drm_dev, "%s: Failed to read pwmgen bit count cap max: %d\n", in drm_edp_backlight_probe_max()
4015 aux->name, ret); in drm_edp_backlight_probe_max()
4025 drm_dbg_kms(aux->drm_dev, in drm_edp_backlight_probe_max()
4027 aux->name, driver_pwm_freq_hz); in drm_edp_backlight_probe_max()
4038 ret = drm_dp_dpcd_writeb(aux, DP_EDP_PWMGEN_BIT_COUNT, pn); in drm_edp_backlight_probe_max()
4040 drm_dbg_kms(aux->drm_dev, "%s: Failed to write aux pwmgen bit count: %d\n", in drm_edp_backlight_probe_max()
4041 aux->name, ret); in drm_edp_backlight_probe_max()
4049 drm_dbg_kms(aux->drm_dev, "%s: Using backlight frequency from driver (%dHz)\n", in drm_edp_backlight_probe_max()
4050 aux->name, driver_pwm_freq_hz); in drm_edp_backlight_probe_max()
4057 drm_edp_backlight_probe_state(struct drm_dp_aux *aux, struct drm_edp_backlight_info *bl, in drm_edp_backlight_probe_state() argument
4064 ret = drm_dp_dpcd_readb(aux, DP_EDP_BACKLIGHT_MODE_SET_REGISTER, &mode_reg); in drm_edp_backlight_probe_state()
4066 drm_dbg_kms(aux->drm_dev, "%s: Failed to read backlight mode: %d\n", in drm_edp_backlight_probe_state()
4067 aux->name, ret); in drm_edp_backlight_probe_state()
4078 ret = drm_dp_dpcd_read(aux, DP_EDP_BACKLIGHT_BRIGHTNESS_MSB, buf, size); in drm_edp_backlight_probe_state()
4080 drm_dbg_kms(aux->drm_dev, "%s: Failed to read backlight level: %d\n", in drm_edp_backlight_probe_state()
4081 aux->name, ret); in drm_edp_backlight_probe_state()
4101 * @aux: The DP aux device to use for probing
4108 * Initializes a &drm_edp_backlight_info struct by probing @aux for it's backlight capabilities,
4117 drm_edp_backlight_init(struct drm_dp_aux *aux, struct drm_edp_backlight_info *bl, in drm_edp_backlight_init() argument
4132 drm_dbg_kms(aux->drm_dev, in drm_edp_backlight_init()
4133 "%s: Panel supports neither AUX or PWM brightness control? Aborting\n", in drm_edp_backlight_init()
4134 aux->name); in drm_edp_backlight_init()
4138 ret = drm_edp_backlight_probe_max(aux, bl, driver_pwm_freq_hz, edp_dpcd); in drm_edp_backlight_init()
4142 ret = drm_edp_backlight_probe_state(aux, bl, current_mode); in drm_edp_backlight_init()
4147 drm_dbg_kms(aux->drm_dev, in drm_edp_backlight_init()
4149 aux->name, bl->aux_set, bl->aux_enable, *current_mode); in drm_edp_backlight_init()
4151 drm_dbg_kms(aux->drm_dev, in drm_edp_backlight_init()
4153 aux->name, *current_level, bl->max, bl->pwm_freq_pre_divider, in drm_edp_backlight_init()
4172 drm_edp_backlight_enable(bl->aux, &bl->info, brightness); in dp_aux_backlight_update_status()
4176 ret = drm_edp_backlight_set_level(bl->aux, &bl->info, brightness); in dp_aux_backlight_update_status()
4179 drm_edp_backlight_disable(bl->aux, &bl->info); in dp_aux_backlight_update_status()
4192 * drm_panel_dp_aux_backlight - create and use DP AUX backlight
4194 * @aux: The DP AUX channel to use
4197 * supports backlight control over DP AUX channel using DPCD
4207 * control over DP AUX will call this function at probe time.
4215 int drm_panel_dp_aux_backlight(struct drm_panel *panel, struct drm_dp_aux *aux) in drm_panel_dp_aux_backlight() argument
4224 if (!panel || !panel->dev || !aux) in drm_panel_dp_aux_backlight()
4227 ret = drm_dp_dpcd_read(aux, DP_EDP_DPCD_REV, edp_dpcd, in drm_panel_dp_aux_backlight()
4233 DRM_DEV_INFO(panel->dev, "DP AUX backlight is not supported\n"); in drm_panel_dp_aux_backlight()
4241 bl->aux = aux; in drm_panel_dp_aux_backlight()
4243 ret = drm_edp_backlight_init(aux, &bl->info, 0, edp_dpcd, in drm_panel_dp_aux_backlight()