6.6. Sink Interfaces

Table 42. Controller Interface
Interface	Port Type	Clock Domain	Port	Direction	Description
clk	Clock	N/A	`clk`	Input	Clock for embedded controller.
reset	Reset	`clk`	`reset`	Input	Active-high reset signal for embedded controller.
rx_mgmt	AV-MM	`clk`	`rx_mgmt_address[8:0]`	Input	32-bit word addressing address.
			`rx_mgmt_chipselect`	Input	Must be asserted for valid read or write access.
			`rx_mgmt_read`	Input	Must be asserted to indicate a read transfer.
			`rx_mgmt_write`	Input	Must be asserted to indicate a write transfer.
			`rx_mgmt_writedata[31:0]`	Input	Data for write transfers.
			`rx_mgmt_readdata[31:0]`	Output	Data for read transfers.
			`rx_mgmt_waitrequest`	Output	Asserted when the DisplayPort IP is unable to respond to a read or write request. Forces the GPU to wait until the IP is ready to proceed with the transfer.
rx_mgmt_irq	IRQ	`clk`	`rx_mgmt_irq`	Output	The IP asserts this signal to issue an interrupt to the GPU.

Controller Interface

Table 43. Transceiver Management Interface `n` is the number of RX lanes.
Interface	Port Type	Clock Domain	Port	Direction	Description
xcvr_mgmt_clk	Clock	N/A	`xcvr_mgmt_clk`	Input	Transceiver management clock.
clk_cal	Clock	N/A	`clk_cal`	Input	Calibration clock.
rx_reconfig	Conduit	`xcvr_mgmt_clk`	`rx_link_rate_8bits[7:0]`	Output	Transceiver link rate reconfiguration handshaking.
			`rx_reconfig_req`	Output
			`rx_reconfig_ack`	Input
			`rx_reconfig_busy`	Input
rx_analog_reconfig	Conduit	`xcvr_mgmt_clk`	`rx_vod [2n-1:0]`	Output	Transceiver analog reconfiguration handshaking.
			`rx_emp [2n-1:0]`	Output
			`rx_analog_reconfig_req`	Output

Note: Value of rx_link_rate 8bits[7:0]: 0x06 = 1.62 Gbps, 0x0a = 2.70 Gbps, 0x14 = 5.40 Gbps, 0x1e = 8.10 Gbps, 0x01 = 10 Gbps

Note: rx_link_rate[1:0] is depreciated.

Transceiver Reconfiguration Interface

Table 44. Video Interface `v` is the number of bits per color, p is the pixels per clock (1 = single, 2 = dual, and 4 = quad), and `N` is the stream number.
Interface	Port Type	Clock Domain	Port	Direction	Description
rxN_vid_clk	Clock	N/A	`rxN_vid_clk`	Input	Video clock.
rxN_video_out	Conduit	`rx_vid_clk`	`rxN_vid_valid[p-1:0]`	Output	Each bit is asserted when all other signals (except `rxN_vid_overflow`) on this port are valid and the corresponding pixel belongs to active video. Width configurable.
			`rxN_vid_sol`	Output	Start of video line.
			`rxN_vid_eol`	Output	End of video line.
			`rxN_vid_sof`	Output	Start of video frame.
			`rxN_vid_eof`	Output	End of video frame.
			`rxN_vid_locked`	Output	1 = Video locked 0 = Video unlocked
			`rxN_vid_overflow`	Output	1 = Video data overflow detected 0 = No overflow detected This signal is always valid.
			`rxN_vid_interlace`	Output	1 = Interlaced 0 = Progressive
			`rxN_vid_field`	Output	1 = Top field 0 = Bottom field (or progressive)
			`rxN_vid_data[3v*p-1:0]`	Output	Width configurable.

Video Interface

Table 45. Video Interface (RX AXI4-stream Video Interface)v is the number of bits per color, p is the pixels per clock (1 = single, 2 = dual, and 4 = quad).
Interface	Port Type	Clock Domain	Port	Direction	Description
rx_axi4s_clk	Clock	N/A	`rx_axi4s_clk`	Input	AXI4-stream video clock (300Mhz)
rx_axi4s_reset	Reset	rx_axi4s_clk	`rx_axi4s_reset`	Input	AXI4-stream video reset
rx_axi4s_vid_in	Conduit		`rx_axi4s_vid_in_tdata[(3v+7/8)p8-1:0]`	Output	AXI4-stream video data
			`rx_axi4s_vid_in_tuser[(3v+7/8)*p-1:0]`	Output	AXI4-stream video data start of frame
			`rx_axi4s_vid_in_tvalid`	Output	AXI4-stream video data valid
			`rx_axi4s_vid_in_tready`	Input	AXI4-stream video data ready
			`rx_axi4s_vid_in_tlast`	Output	AXI4-stream video data end of line

Table 46. AUX Interface
Interface	Port Type	Clock Domain	Port	Direction	Description
aux_clk	Clock	N/A	`aux_clk`	Input	AUX channel clock.
aux_reset	Reset	`aux_clk`	`aux_reset`	Input	Active-high AUX channel reset.
rx_aux	Conduit	`aux_clk`	`rx_aux_in`	Input	AUX channel data input.
			`rx_aux_out`	Output	AUX channel data output.
			`rx_aux_oe`	Output	Output buffer enable.
			`rx_hpd`	Output	Hot plug detect.
			`rx_cable_detect`	Input	Upstream cable detect.
			`rx_pwr_detect`	Input	Upstream power detect.
rx_aux_debug	AV-ST	`aux_clk`	`rx_aux_debug_data[31:0]`	Output	Formatted AUX channel debug data.
			`rx_aux_debug_valid`	Output	Asserted when all the other signals on this port are valid.
			`rx_aux_debug_sop`	Output	Start of packet (start of AUX request or reply).
			`rx_aux_debug_eop`	Output	End of packet (end of AUX request or reply).
			`rx_aux_debug_err`	Output	Indicates if the IP detects an error in the current byte.
			`rx_aux_debug_cha`	Output	The channel number for data being transferred on the current cycle. Used as AUX channel data direction. 1 = Reply (to DisplayPort source) 0 = Request (from DisplayPort source)
EDID (rx_edid)	AV-MM	`aux_clk`	`rx_edid_address[7:0]`	Output	8-bit byte addressing address.
			`rx_edid_read`	Output	Asserted to indicate a read transfer.
			`rx_edid_write`	Output	Asserted to indicate a write transfer.
			`rx_edid_writedata[7:0]`	Output	Data for write transfers.
			`rx_edid_readdata[7:0]`	Input	Data for read transfers.
			`rx_edid_waitrequest`	Input	Must be asserted when the Slave is unable to respond to a read or write request. Forces the DisplayPort IP to wait until the Slave is ready to proceed with the transfer.

AUX Interface

Table 47. Debugging Interface `s` is the number of symbols per clock and `N` is the stream number.
Interface	Signal Type	Clock Domain	Port	Direction	Description
Link Parameters (rx_params)	Conduit	aux_clk	`rx_lane_count[4:0]`	Output	Sink current link lane count value.
Debugging (rxN_stream)	Conduit	`rx_ss_clk`	`rxN_stream_data[48s–1:0]`	Output	Post scrambler data.
			`rxN_stream_ctrl[4*s–1:0]`	Output	Post scrambler comma marker. The IP asserts each bit when the relative 8-bit byte is a comma code, and deasserts each bit when the byte is a data value. Bit 0 qualifies `rxN_stream_data[7:0]` byte, bit 1qualifies the `rxN_stream_data[15:8]` byte, and so on.
			`rxN_stream_valid`	Output	Asserted for one clock cycle when `rxN_stream_data[63:0]` and `rxN_stream_ctrl[7:0]` are valid.
			`rxN_stream_clk`	Output	Port clock.

Debugging Interface

Table 48. Secondary Interface `N` is the stream number; for example, `rx_msa_conduit` represents Stream 0, `rx1_msa_conduit` represents Stream 1, and so on .
Interface	Signal Type	Clock Domain	Port	Direction	Description
rx_ss_clk	Clock	N/A	`rx_ss_clk`	Output	Clock.
MSA (rxN_msa_conduit)	Conduit	`rx_ss_clk`	`rxN_msa[216:0]`	Output	Output for current MSA parameters received from the source.
Secondary Stream (rxN_ss)	AV-ST	`rx_ss_clk`	`rxN_ss_data[159:0]`	Output	Secondary stream interface.
			`rxN_ss_valid`	Output
			`rxN_ss_sop`	Output
			`rxN_ss_eop`	Output

Secondary Stream Interface

Table 49. Audio Interface `m` is the number of RX audio channels. `N` is the stream number; for example, `rx_audio` represents Stream 0, `rx1_audio` represents Stream 1, and so on .
Interface	Signal Type	Clock Domain	Port	Direction	Description
Audio (rxN_audio)	Conduit	`rx_ss_clk`	`rxN_audio_lpcm_data[m*32–1:0]`	Output	N channels of 32-bit audio sample data.
			`rxN_audio_valid`	Output	Asserted when valid data is available on `rxN_audio_lpcm_data`.
			`rxN_audio_mute`	Output	Asserted when audio is muted.
			`rxN_audio_infoframe[39:0]`	Output	40-bit bundle containing the Audio InfoFrame packet.

Audio Interface

Table 50. RX Transceiver Interface `n` is the number of RX lanes, `s` is the number of DisplayPort 1.4 symbols per clock. For any link rates equal to or below UHBR10, `w = n * s * 10`. For link rates above UHBR10, `w = 64`.
Note: Connect the DisplayPort signals to the Native PHY signals of the same name.
Interface	Port Type	Clock Domain	Port	Direction	Description
RX transceiver interface	Clock	N/A	`rx_std_clkout`	Input	RX transceiver recovered clock. Equivalent to Link Speed Clock (`ls_clk`). All lanes on this interface use a single clock, sourced from DisplayPort Lane 0.
	Conduit	`rx_xcvr_clkout`	`rx_parallel_data[w–1:0]`	Input	Parallel data from RX transceiver.
	Conduit	`rx_xcvr_clkout`	`rx_restart`	Output	Use to reset the RX PHY Reset Controller when the RX data loses alignment. Note: Required for Arria® 10, Cyclone® 10 GX, and Stratix® 10 devices. Not used in Arria V, Cyclone V, and Stratix V devices.
	Conduit	N/A	`rx_is_lockedtoref[n–1:0]`	Input	When asserted, indicates that the RX CDR PLL is locked to the reference clock.
	Conduit	N/A	`rx_is_lockedtodata[n–1:0]`	Input	When asserted, indicates that the RX CDR PLL is locked to the incoming data.
	Conduit	`rx_xcvr_clkout`	`rx_bitslip[n–1:0]`	Output	Use to control bit slipping manually.
	Conduit	N/A	`rx_cal_busy[n–1:0]`	Input	Calibration in progress signal from RX transceiver.
	Conduit	`xcvr_mgmt_clk`	`rx_analogreset[n–1:0]`	Output	When asserted, resets the RX CDR. Note: Required only for Arria V, Cyclone V, and Stratix V devices.
	Conduit	`xcvr_mgmt_clk`	`rx_digitalreset[n–1:0]`	Output	When asserted, resets the RX PCS. Note: Required only for Arria V, Cyclone V, and Stratix V devices.
	Conduit	`xcvr_mgmt_clk`	`rx_set_locktoref[n–1:0]`	Output	Forces the RX CDR circuitry to lock to the phase and frequency of the input reference clock.
	Conduit	`xcvr_mgmt_clk`	`rx_set_locktodata[n–1:0]`	Output	Forces the RX CDR circuitry to lock to the received data.

RX Transceiver Interface

Table 51. HDCP InterfaceApplicable only when you turn on the Support HDCP 2.3 or Support HDCP 1.3 parameters.
Interface	Port Type	Clock Domain	Port	Direction	Description
HDCP Clocks (hdcp_clks)	Reset	–	`hdcp_reset`	Input	Main asynchronous reset for HDCP.
	Clock	–	`crypto_clk`	Input	HDCP 2.3 clock for authentication and cryptographic layer. You can use any clock with a frequency up to 200 MHz. Not applicable for HDCP 1.3. Note: The clock frequency determines the authentication latency.
	Clock	–	`rpt_msg_clk`	Input	HDCP clock for the Repeater registers in the Control and Status Register layer. Typically, shares the clock (100 MHz) that drives the repeater downstream Nios® V processor.
Repeater Message Interface (rx_rpt_msg)	Avalon-MM	`rpt_msg_clk`	`rx_rpt_msg_addr[7:0]`	Input	The Avalon memory-mapped slave port that provides access to the Repeater registers, mainly for `ReceiverID_List` and `RxInfo`. This interface is expected to operate at repeater downstream Nios® V processor clock domain. Because of the extremely large bit portion of message, the IP transfers the message in burst mode with full handshaking mechanism. Write transfers always have a wait time of 0 cycle while read transfers have a wait time of 1 cycle. The addressing should be accessed as word addressing in the Platform Designer flow. For example, addressing of 4 in the Nios® V software selects the address of 1 in the slave.
			`rx_rpt_msg_wr`	Input
			`rx_rpt_msg_rd`	Input
			`rx_rpt_msg_wrdata[31:0]`	Input
			`rx_rpt_msg_rddata[31:0]`	Output
HDCP Key and Status Interface (rx_hdcp)	Conduit (Key)	`crypto_clk`	`rx_kmem_wait[0]` (HDCP 2.3) `rx_kmem_addr[1]` (HDCP 1.3)	Input	Always keep this signal asserted until the key is ready to be read. This signal is not available if you turn on the Support HDCP Key Management parameter.
			`rx_kmem_rdaddr[7:0]` (HDCP 2.3) `rx_kmem_rdaddr[13:8]` (HDCP 1.3)	Output	Key read address bus. This signal is not available if you turn on the Support HDCP Key Management parameter.
			`rx_kmem_q[31:0]` (HDCP 2.3) `rx_kmem_q[87:32]` (HDCP 1.3)	Input	Key read data transfer. Read transfer always have 1 cycle of wait time. This signal is not available if you turn on the Support HDCP Key Management parameter.
	Avalon-MM	`clk`	`rx_hdcp1_kmem_wr`	Input	The Avalon® memory-mapped slave port provides write access to internal HDCP 1.3 key storage. Write transfers always have a wait time of 0. The Avalon® memory-mapped master access the addressing as word addressing in the Platform Designer flow. For example, addressing of 4 in the Avalon® memory-mapped master selects the address of 1 in the slave. These signals are only available if you turn on the Support HDCP Key Management parameter and the Support HDCP 1.3 parameter.
			`rx_hdcp1_kmem_wrdata[31:0]`	Input
			`rx_hdcp1_kmem_addr[6:0]`	Input
	Avalon-MM	`hdcp_i2c_clk`	`rx_hdcp2_kmem_wr`	Input	The Avalon® memory-mapped slave port provides write access to internal HDCP 2.3 key storage. Write transfers always have a wait time of 0. The Avalon® memory-mapped master access the addressing as word addressing in the Platform Designer flow. For example, addressing of 4 in the Avalon® memory-mapped master selects the address of 1 in the slave. These signals are only available if you turn on the Support HDCP Key Management parameter and the Support HDCP 2.3 parameter.
			`rx_hdcp2_kmem_wrdata[31:0]`	Input
			`rx_hdcp2_kmem_addr[7:0]`	Input
	Conduit	`rx_std_clkout[0]`	`rx_hdcp1_enabled`	Output	This signal is asserted by the IP if the incoming video and auxiliary data are HDCP 1.3 encrypted.
			`rx_hdcp2_enabled`	Output	This signal is asserted by the IP if the incoming video and auxiliary data are HDCP 2.3 encrypted.
			`rx_streamid_type`	Output	0: The received stream type is 0. 1: The received stream type is 1.
		`clk`	`rx_hdcp1_disable`	Input	Assert this signal to disable the HDCP 1.3 IP. Note: You must reset the HDCP IP (`hdcp_reset`) and trigger a Hot Plug event after toggling this signal.
		`clk`	`rx_hdcp2_disable`	Input	Assert this signal to disable the HDCP 2.3 IP. Note: You must reset the HDCP IP (`hdcp_reset`) and trigger a Hot Plug event after toggling this signal.

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DisplayPort IP User Guide

6.6. Sink Interfaces