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AM5728: Regarding video chip interfacing

anantha nagavidhyalavanya
Intellectual 940 points
Part Number: AM5728

Hello everyone,

here we are going to update our custom board with am5728, in this new board we have a requirement of 3 video interfaces  so while i am doing so being as a new to this i am getting confusion so some one please help in this,

1. we want 3 camera to be connected to video chip adv7180 which have 4 channels possible.  so while creating pinmux file in vin i added 2 more  say in evm pinmux has vin3a, i added vin1a,vin1b and also i changed 24 bit in vin3a to 8 bit to avoid conflict. but is it correct way?

2.by default am5728 has rgb format but we want lvds output,so rgb to lvds how to  convert?

3. is it possible to get 2 rgb channel output o have 2 displays?

4.i want hdmi output but at a time can i choose lvds and hdmi?

i am requesting some one te help me in  understanding these clearly.

  • 0
    TI__Genius 14680 points

    Anantha,

    Q1: you can configure to BT.656 mode and AM5728 SYNC_TYPE to any of the embedded modes and be good with 8 data pins + clock per channel

    Q2: Please see https://www.ti.com/tool/TIDA-010013 for a possible solution

    Q3: Each display output is single channel/display

    Q4: Please refer to the TRM for the video output feature summary: 

    11.1 Display Subsystem Overview

    The Display Subsystem (DSS) provides the logic to display a video frame from the system memory frame buffer on a liquid-crystal display( LCD) panel or TV set. The display subsystem can display different pictures simultaneously by using three LCD outputs (LCD1, LCD2, and LCD3), in addition to a TV output. All three LCD outputs are available on three parallel interfaces (DPI1, DPI2, and DPI3), providing support for MIPI DPI 2.0, or BT-656 or BT-1120. The TV output is available on one of the following interfaces

    •  High-Definition Multimedia Interface (HDMI)

    •  DPI1 parallel interface

    The modules integrated in the display subsystem are:

    •  Display controller (DISPC):

      –  One direct memory access (DMA) engine

      –  One graphics pipeline (GFX), three video (VID) pipelines, and one write-back (WB) pipeline

      –  Three LCD outputs and one TV output, each with a dedicated overlay manager

    •  HDMI protocol engine:

      –  HDMI 1.4a support up to 1080p@60Hz (including 3D frame-packing support)

      –  36-bit RGB color

      –  HDCP 1.4 key protection–  Deep color mode support (10-bit/12-bit for 148.5-MHz pixel clock)

    Best regards,

    Dave