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TDA4VM: DSS

hui wang3
Prodigy 131 points
Part Number: TDA4VM

Hi,

We designed a product with tda4 chip, and we encountered the following problems when configuring bt1120 interface.

1.I want to configure vout0 (dpi0) and Vout1 (dpi1) to bt1120 mode,I don't know where to configure it.(Only the configuration files for DSI and EDP interfaces in PSDKRA(app_dss_defaults.c)).I found the driver of DSS (I don't know, right? ）In the directory:pdk_jacinto_07_00_00\packages\ti\drv\dss\src\drv. There are only DP and DSI drivers, not have BT mode drivers.Does BT mode need drivers similar to DP and DSI? If necessary, do you have driver source code?

2. Now the driver of DSS is controlled by r5f(TI-RTOS), but, I have two video data streams on A72(Linux). How can I use the display screen (bt1120) to display these two video data streams at the same time?

Looking forward to your reply, thanks a lot!

  • 0
    TI__Guru**** 477145 points

    Hi Wang,

    You could use HDMI output and then for HDMI output, you could reconfigure output for BT mode, it is possible. 

    I did not understand two video stream on A72. You could open two OpenVX display node and connect them to BT1120 output to get them both displayed on it. Currently three pipelines are connected to the same display, one for graphics and two for video. So you could use two video pipeline stream data.. 

    Regards,

    Brijesh

  • 0 in reply to Brijesh Jadav
    Prodigy 131 points

    Hi Brijesh,

    I was first exposed to this architecture, I don't understand one thing, as follow:

    Question: The drive of DSS display is done by r5f, so, how do I find the corresponding device in A72? or, How to find the corresponding relationship between the driver in r5f and the device in A72?

    Looking forward to your reply, thanks a lot!

  • 0 in reply to hui wang3
    TI__Guru**** 477145 points

    Hi Wang,

    Sorry, i did not get your question. driver on R5F and device on A72? 

    DSS component is on SoC and it is controlled by R5F in vision apps, not A72. 

    Regards,

    Brijesh