Core Enables - 2.1 English - PG199

DisplayPort 1.2 TX Subsystem LogiCORE IP Product Guide (PG199)

Document ID: PG199
Release Date: 2024-12-11
Version: 2.1 English

Table 1. Core Enables
Offset	R/W	Definition
0x080	RW	TRANSMITTER_ENABLE. Enable the basic operations of the transmitter. [0] – When set to 1, stream transmission is enabled. When set to 0, all lanes of the main link output stuffing symbols.
0x084	RW	MAIN_STREAM_ENABLE. Enable the transmission of main link video information. [0] – When set to 0, the active lanes of the DisplayPort transmitter will output only VB-ID information with the NoVideo flag set to 1. Note: Main stream enable/disable functionality is gated by the VSYNC input. The values written in the register are applied at the video frame boundary only.
0x090	RW	VIDEO_PACKING_CLOCK_CONTROL: This register is used when GT data width is 32-bit.To meet the bandwidth requirement for the resolutions where vid_clk/vid_pixel_mode < lnk_clk frequency and with BPC 12/16 the video packing has to work at lnk_clk, setting the bit to '1' enables the packing from lnk_clk domain. By default video data packing is done in Vid_clk.All the resolutions with less than or equal to 10-BPC works with packing at vid_clk. [0] – set to 1 to enable the video data packing to work in lnk_clk for SST video or for Stream 1 in MST. [1] – set to 1 to enable the video data packing to work in lnk_clk for Stream 2 in MST. [2] – set to 1 to enable the video data packing to work in lnk_clk for Stream 3 in MST. [3] – set to 1 to enable the video data packing to work in lnk_clk for Stream 4 in MST.
0x0C0	WO	FORCE_SCRAMBLER_RESET. Reads from this register always return 0x0. [0] – 1 forces a scrambler reset.
0x0D0	RW	TX_MST_CONFIG: MST Configuration. [0] – MST Enable: Set to 1 to enable MST functionality. [1] – VC Payload Updated in sink: This is an WO bit. Set to 1 after reading DPCD register 0x2C0 (bit 0) is set.
0x0F0	RW	TX_LINE_RESET_DISABLE. TX line reset disable. This register bits have to be used to disable the end of line reset to the internal video pipe in case of reduced blanking video support. [0] – End of line reset disable to the SST video stream/ MST video stream1 [1] – End of line reset disable to the MST video stream2 [2] – End of line reset disable to the MST video stream3 [3] – End of line reset disable to the MST video stream4