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PROCESSOR-SDK-DRA8X-TDA4X: DSI Support in PSDKA 6.2

Amit Kamath
Intellectual 800 points

Part Number: PROCESSOR-SDK-DRA8X-TDA4X

Hi TI

From the documentation of PSDKLA version 6.2, DSI is not supported. Which release is this feature targetted.

PSDKLA: Version 6.2
ti-processor-sdk-linux-automotive-j7-evm-06_02_00/docs/linux/Foundational_Components/Kernel/Kernel_Drivers/Display/DSS7.html

Best regards
Amit

  • 0
    TI__Expert 8385 points

    Hello Amit,

    Thank you for your post. We will look into this and get back.

    Regards

    Hemant

  • 0 in reply to Hemant Hariyani
    TI__Guru**** 475745 points

    Hello Amit,

    DSI driver is supported in PSDKRA 6.2 release and it is tested with one of DSI LCD.

    Are you planning to use DSI output? Could you please provide some information about DSI display/output, that you are planning to use?

    Rgds,

    Brijesh 

  • 0 in reply to Brijesh Jadav
    Intellectual 800 points

    Hi Brijesh,

    Thanks for update. Its good that DSI support is already present.

    We do have plan to use DSI. Our hw configuration has bridge chip.

    We have maxim bridge chip serializer 96755 on our board. We will interface LCD panel with compatible deserializer.

    Can you point to DSI/DSS example that uses any bridge chip. We can use it as reference to send the initial configuration table for serializers/deserializers.

    If you have sequence diagram or flow information for the execution path it will be of great help. DSI depends on the exact timing of start/stop of clocks and data so this will guide us in debugging.

    Best regards

    Amit

  • 0 in reply to Amit Kamath
    TI__Guru**** 475745 points

    Hi Amit,

    On EVM, we have UB941 serializer, which is connected at the DSI output. Also the LCD that we support has UB924 deserializer. We use this combo to check DSI output. 

    You could find configuration for this SERDES in the file pdk\packages\ti\drv\dss\examples\dss_display_test\dss_display_dsi_cfg.c, the same examples also supports DSI output format by enabling DISP_APP_TEST_DSI macro in this example. Please note that this PDK example, so requires to be loaded using CCS. 

    Rgds,

    Brijesh

  • 0 in reply to Brijesh Jadav
    TI__Intellectual 1345 points

    Hi Brijesh,

    Please, I have the following question.

    1- Can we test the DSI output with any LCD Screen or there is a specific one that we must use ?

    2- If I want to use DSI output, should I pass through 941 serializer or I can go from SoC to DSI output directly ? in case I want to generate video signal from SoC to test a screen display.

    3- the same question for FPD-Link panel, can I use it without without passing from 941 serializer ?

    Thanks in advance.

    Brahim

  • 0 in reply to Brahim Salh
    TI__Expert 5615 points

    Hi Vivek,

    Please find my responses as below:

    1- Can we test the DSI output with any LCD Screen or there is a specific one that we must use?

    Ans: A: There are DSI displays available that can be directly connected to DSI output pins. For this, you need a compatible connector present on the EVM and on the LCD display module. We have not validated this.

            B: If you are using serializer (like UB941 on the TI EVM), then the LCD display module shall have compatible deserializer. We have validated this with the UB941-UB924 pair. 

    2- If I want to use DSI output, should I pass through 941 serializer or I can go from SoC to DSI output directly ? in case I want to generate video signal from SoC to test a screen display.

    Ans: Point A of the above answer.

    3- the same question for FPD-Link panel, can I use it without without passing from 941 serializer ?

    Ans: Point B of the above answer.

    Thanks & Regards,
    Vivek Dhande.

    Texas Instruments (India) Pvt Ltd