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TDA4VM: how to Enabling A72 Control of DSS (DP display)

yajun wang
Prodigy 60 points
Part Number: TDA4VM

Tool/software:

Dear TI:

as 5. PSDK QNX Components — Processor SDK QNX J721E, 

By default the PSDK QNX delivery will default to eDP display, controlled from the R5. The items that must be addressed for the system to run with R5 Controlled Display, and are set by default are:

  • The libWFDdummy.so must be used by the QNX graphics.conf file Reference ${PSDK_QNX_PATH}/qnx/scripts/user__dss_on_r5.sh.

  • The QNX BSP startup command line option in the QNX BSP build file, must have the “-d” option specified

  • ENABLE_DSS flag must be defined, please reference Vision Apps User Guide, see section on “Build Instructions”:

but it say :The A72 control of DSS on HDMI Display is not working in some senario.

now  we can run vision_app with DP display monitor by R5,  but modify to A72 control DSS, it has NULL on DP display monitor;

but we want use A72 control DSS, and use openegl,  QT on QNX;    is it ok?  

  • 0
    TI__Guru**** 454475 points

    QT on QNX? I really doubt it is even supported.. 

    DSS on R5F can be disabled, but you need to enable it on QNX and use QNX utilities to display using DSS. 

    Regards,

    Brijesh

  • 0 in reply to Brijesh Jadav
    Prodigy 60 points

    how to enable it on QNX and use QNX utilities to display using DSS?

    5. PSDK QNX Components — Processor SDK QNX J721E  

    5.2.1. Enabling R5 Control Of DSS  

    5.2.2. Enabling A72 Control of DSS

    now as follow, we can display on R5,  but as modify by  Enabling A72 Control of DSS, it can not display .   

  • 0 in reply to yajun wang
    TI__Guru**** 454475 points

    Hi,

    I can help to display from R5F. For QNX, can you please check with QNX/Bleckberry team?

    Regards,

    Brijesh  

  • 0 in reply to Brijesh Jadav
    Prodigy 60 points

    but with wfd-dlls = libwfdcfg-generic.so libWFDjacinto7.so,  it may be TI function?

  • 0 in reply to yajun wang
    Prodigy 60 points

    - Configuring Screen

    as QNX 

    • egl display
    • wfd device

    the WFD device driver it may be support by hardware TDA4,  for R5F display, it config as 

    begin wfd device 1
    pipeline-ids = 1
    display-ids = 1
    wfd-dlls = libwfdcfg-sample.so libWFDdummy.so
    end wfd device

    for QNX a72, it config as 

    begin wfd device 1
    wfd-dlls = libwfdcfg-generic.so libWFDjacinto7.so

    # port/vp binding
    # Note: in the case of a single port requiring multiple VP specify primary VP first
    # 1 = VP1
    # 2 = VP2
    # 3 = VP3
    # 4 = VP4
    port1 = 1
    port2 = 2

    # Pipeline/display binding
    video1 = 1
    videolite1 = 1
    video2 = 2
    videolite2 = 2

    end wfd device

    so  we should check  libWFDjacinto7.so,  and some  wfd device, why it can not display on QNX A72 ?

  • 0 in reply to yajun wang
    TI__Guru**** 454475 points

    Hi,

    Again this question is for QNX, so can you please check with QNX? 

    Regards,

    Brijesh