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VPDMA firmware

ranchu
Guru 20755 points

Hello,

What is VPDMA firmware and how does it load it from ?

Is it loaded through bootcmd ? I can't find it.

I also not sure about the address map of vpdma:

I'm not sure where is the vpdma in my memory map.

I am using 512 DDR with linux 128.

In my application note it says: for 512M

0xB0000000 – Placed in Tiler Memory space for 814X/810X Platforms
• <VPDMA Descriptor address> 0xBFDD0000 – Placed in HDVPSS Desc Address space for 814X/810X
Platforms

But on building the SDK it shows:

...

| +-------------------+ 
| | 2 MB | VPSS M3 - VPDMA Descriptor
| +-------------------+
| | 2 MB | VPSS M3 - FBDev Shared Memory
| +-------------------+
| | 2 MB | Host - VPSS M3 Notify(For FBDev)
| +-------------------+
v | 1 MB | Remote Debug Print
0xC0000000 +-------------------+

From this map I calculate that 0xc0000000-1M-2M-2M = 0xBF900000

So which one of the above is the correct address ?

regards,

Ran

  • 0
    TI__Guru**** 170625 points
    Hi Ran,

    In u-boot-dvr-rdk, the VPDMA firmware comes as c/h files:

    /include/ti81xx_vpdma_firmware.h
    /include/logo_814x.h
    /common/cmd_logo_814x.c

    Beyond u-boot, the VPDMA code is part of the HDVPSS M3 firmware (dm814x_hdvpss.xem3), it does not come as a separate file, at least for the EZSDK.

    See the below e2e threads for more info:

    e2e.ti.com/.../209071
    e2e.ti.com/.../305469
    e2e.ti.com/.../288379
    e2e.ti.com/.../330570

    BR
    Pavel
  • 0 in reply to Pavel Botev
    Guru 20755 points

    Hi Pavel,

    Thank you for the time,

    I try to understand what should be vpdma address:

    In my application note it says: for 512M

    0xB0000000 – Placed in Tiler Memory space for 814X/810X Platforms

    • <VPDMA Descriptor address> 0xBFDD0000 – Placed in HDVPSS Desc Address space for 814X/810X

    Platforms

    But on building the SDK it shows:

    ...

    | +-------------------+

    | | 2 MB | VPSS M3 - VPDMA Descriptor

    | +-------------------+

    | | 2 MB | VPSS M3 - FBDev Shared Memory

    | +-------------------+

    | | 2 MB | Host - VPSS M3 Notify(For FBDev)

    | +-------------------+

    v | 1 MB | Remote Debug Print

    0xC0000000 +-------------------+

    From this map I calculate that 0xc0000000-1M-2M-2M = 0xBF900000

    So which of the above is correct: 0xBFDD0000  or 0xBF900000 ?

    Regards,

    Ran

  • 0 in reply to ranchu
    TI__Guru**** 170625 points
    Ran,

    This seems to be specific for DVR RDK, as for EZSDK we have 0xBFD00000 for 1GB and 512MB memory map and 0xAFD00000 for 256MB:

    processors.wiki.ti.com/.../EZSDK_Memory_Map

    Searching in other e2e threads, I see that you can print this address to be sure about the exact value, see the below pointers:

    e2e.ti.com/.../279273
    e2e.ti.com/.../144678
    e2e.ti.com/.../932884

    Note that the second 256MB chunk start from 0xA0000000:

    hdvpss_xx_xx_xx_xx/packages/config_ti814x.bld

    BR
    Pavel
  • 0 in reply to Pavel Botev
    Guru 20755 points

    Hi Pavel,

    Thank you for this information.

    When I print the value of HDVPSS_DESC_ADDR from the bld file (512M ) it print 0xBFB00000 while in Application note it is said that its value for 512M DDR bld is 0xBFDD0000.

    I'm not sure which one I should choose.

    Regards,

    Ran