SPRAD00 December   2021 DRA821U-Q1 , DRA829J , DRA829J-Q1 , DRA829V , DRA829V-Q1 , TDA4VM

 

  1.   Trademarks
  2. 1Introduction
  3. 2Jacinto 7 Display Subsystem Overview
    1. 2.1 Video (Input) Pipelines
    2. 2.2 Writeback Pipeline
    3. 2.3 Overlay Manager
    4. 2.4 Output Processing
    5. 2.5 Output Display Interfaces
      1. 2.5.1 Embedded Display Port (eDP)
      2. 2.5.2 MIPI Display Serial Interface (DSI)
      3. 2.5.3 Display Parallel Interface (DPI)
    6. 2.6 Safety Support
  4. 3Display Subsystem Use-case Examples
    1. 3.1 3-Display Configuration
  5. 4TDA4VM/DRA829V Hardware Display Support
  6. 5 Display Subsystem Software Architecture
    1. 5.1 Linux DSS Architecture
    2. 5.2 QNX Software Architecture
    3. 5.3 RTOS-Based DSS Support
  7. 6References

2.6 Safety Support

  • Enhanced safety features. Entire display subsystem is designed for ASIL-B.
  • DSS supports the following safety check regions to implement the safety as shown in Figure 2-2.
    • Input pipelines: One safety check region at the output of each video pipeline.
    • Output ports: Up to four sub-regions within the active video output area of the final display output of each video port.
  • Each safety check region supports
    • Data correctness check: To verify intended data is shown correctly on the display.
    • Freeze frame detection: To notify a possible frame freeze, when there is no change in the display frame over a multiple frame periods.
  • Display pipe and Display management isolation enables virtualization via separate virtual machine ownership per pipe.
    • Each data pipe and corresponding control registers are segmented on separate 64K firewall-protected regions.
    • Each data overlay and output processing control registers are segmented on separate 64K firewall-protected regions.
GUID-20210922-SS0I-J7Q3-M9MW-21JQFTH5NBRR-low.gif Figure 2-2 Display Subsystem Input and Output Frame Region Safety Checker