SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
The DSS is a flexible composition-enabled display subsystem, that supports multiple high resolution display outputs. It consists of a Display Controller (DISPC) and a Frame Buffer Decompression Core (FBDC). The DISPC supports a multi-layer blending and transparency for each of its display outputs. The DISPC also supports a write-back pipeline with scaling to enable memory-to-memory composition and/or to capture a display output for Ethernet video encoding. The DISPC supports gamma correction and programmable color control in both source and destination pipelines for enhanced color space control and video output quality. The DISPC video outputs connect to various display interface controllers, integrated at the SoC level, to drive specific displays in the end application. The DSS also includes freeze frame detection and data signature check capabilities for each display output path.
The MIPI DSI v1.3.1 Controller (DSITX) implements the stream arbitration and low-level protocol layer functionalities required by MIPI DSI 1.3 standard. It supports up to 4 x 2.5 Gbps D-PHY data lanes in a single-link configuration and handles the byte lane mapping per use case (1, 2, 3, or 4-lanes). The accompaning DSI (Physical Layer) D-PHY module (DPHY_TX) provides the video output interfacing by implementing a four-lane MIPI D-PHY transmitter.
The VESA DP1.4/eDP1.4 Compliant Transmitter Host Controller (EDP) can output up to 4 video streams (through Multiple Stream Transport / MST) and one audio stream through the 4-lane accompaning SerDes module. It provides up to 25.92 Gbps of application bandwidth. An additional auxiliary PHY (AUXPHY) module implements a doubly-terminated differential pair required for 1 Mbps data rates over a long (15m) cable. This is a half duplex, Manchester II encoded connection, used by the EDP to configure the link. The AUX channel is used to access the Display Port Configuration Data (DPCD) memory area in the sink device and to implement VESA Enhanced Extended Display Identification Data (EDID) function.