AM5728: IPU hangs on Linux mailbox init

Pavel Azizov42

Intellectual 300 points

Part Number: AM5728

Hello.

We have encountered the following issue.

We send messages via MessageQ from IPU1 to DSP2 (both run TI RTOS).

Then we start Linux on MPU (A15 cores).

And arch/arm/mach-omap2/omap_hwmod.c driver initializes "mailbox7" among others in setup() procedure.

After that IPU1 hangs in MessageQ_put() procedure.

We see no obvious relationship between mailbox 7 and link from IPU1 to DSP2.

What might be the issue?

We have disabled mailbox 7 setup and for now it solved our problem.

But we cannot track all possible consequences of this decision.

What can it affect?

Regards,

Pavel

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

The software team have been notified. They will respond here.

0 Rex Chang over 8 years ago in reply to Biser Gatchev-XID

TI__Guru 50170 points

Hi, Pavel,

Is mailbox7 the one defined in dra7.dtsi? When disabling it, do you mean you comment it out in dra7.dtsi? any other changes in Linux?

Rex

0 Pavel Azizov42 over 8 years ago in reply to Rex Chang

Intellectual 300 points

Hi, Rex,

We comment out initialization of mailbox7 in omap_hwmod.c

Pavel

0 Sahin Okur over 8 years ago

TI__Mastermind 27355 points

Hi Pavel,

Mailbox 7 is used in Notify module and initialized in NotifySetup.c (found here: \packages\ti\sdo\ipc\family\vayu).

Notify is used by MessageQ, so during Linux kernel boot-up, the mailbox gets re-initialized which causes the break in the IPC communication in the IPU that you are seeing.

Best,
Sahin

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AM5728: IPU hangs on Linux mailbox init