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AM625: dma-controller: chan1 teardown timeout!

Tony Tang
Mastermind 29852 points

Part Number: AM625

Just after launch up, the kernel reports UDMA teardown timeout, what is it? will it impact something?

I am using latest SDK9.2 default .wic image boot from SD card.

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Arago Project am62xx-evm -

Arago 2023.10 am62xx-evm -

am62xx-evm login: [ 18.658778] ti-udma 485c0100.dma-controller: chan2 teardown timeout!
[ 23.106832] ti-udma 485c0100.dma-controller: chan1 teardown timeout!

  • 0
    TI__Guru**** 175331 points

    Hi Tony,

    root@am62xx-evm:~# dmesg|grep timeout
[   16.606698] ti-udma 485c0100.dma-controller: chan2 teardown timeout!
[   17.634738] ti-udma 485c0100.dma-controller: chan1 teardown timeout!
[   23.902629] ti-udma 485c0100.dma-controller: chan1 teardown timeout!
root@am62xx-evm:~# cat /sys/kernel/debug/dmaengine/summary
dma0 (485c0100.dma-controller): number of channels: 48
 dma0chan0    | in-use (MEM_TO_MEM, bchan0)
 dma0chan1    | 2b10000.audio-controller:tx (MEM_TO_DEV, tchan0 [0x2000 -> 0xc501], PDMA[ ACC32 BURST ], TR mode)
 dma0chan2    | 2b10000.audio-controller:rx (DEV_TO_MEM, rchan6 [0x4501 -> 0xa006], PDMA[ ACC32 BURST ], TR mode)

dma1 (485c0000.dma-controller): number of channels: 35
 dma1chan0    | 40900000.crypto:rx1 (DEV_TO_MEM, rchan22 [0x7506 -> 0x9016], rflow43, PSI-L Native[ EPIB PSDsize:64 ], Packet mode)
 dma1chan1    | 40900000.crypto:rx2 (DEV_TO_MEM, rchan23 [0x7507 -> 0x9017], rflow44, PSI-L Native[ EPIB PSDsize:64 ], Packet mode)
 dma1chan2    | 40900000.crypto:tx (MEM_TO_DEV, tchan28 [0x101c -> 0xf501], tflow91, PSI-L Native[ EPIB PSDsize:64 ], Packet mode)

    Please see the log above, the message is printed by the DMA channels used in by McASP1 (2b10000.audio-controller). I am not sure what the impact is. Do you have any issue in McASP applications?