[PATCH v6 00/17] Introduce initial TI's J784S4 and AM69 support

[Marcel Ziswiler]

On Fri, 2023-12-15 at 08:23 -0600, Nishanth Menon wrote:

[snip]

> > > What version of TIFS are you running? Not getting a response usually 
> > > means firmware is dead or we're not using the right thread to talk.
> > 
> > Yeah, sorry. I was always running the latest from the ti-linux-firmware branch:
> > 
> > SYSFW ABI: 3.1 (firmware rev 0x0009 '9.1.2--v09.01.02 (Kool Koala)')
> > 
> > So, it is really TF-A which seems to cause the issue.
> 
> Actually not TFA either (TFA complains correctly). we have an internal
> ticket that is in the middle of getting fixed for TIFS and PDK to
> enable this. a bit of history: A new api TISCI_MSG_QUERY_FW_CAPS[1]
> was introduced to help determine which version of firmware combination
> supports what features (such as Low power, etc). This allows for
> consistent TFA/Kernel implementation that can dynamically detect
> platforms (since LPM also involved a bit of firmware handshaking for
> board specific details - PMIC control and the like). This API is as
> fundamental as version message API that all firmware are supposed to
> implement. unfortunately the defconfig option for that API wasn't
> properly implemented for various firmware components correctly. -
> impacted chips are: j721e, j7200, j721s2/am68, j784s4/am69. Other
> K3 processor firmware have it implemented correctly. The latest
> 9.1.8--v09.01.08 has the bug as well - but hopefully should be fixed
> and released soon-ish.

Thanks, Nishanth. Glad you guys are aware of this and I am not just seeing things (;-p).

> [1] https://software-dl.ti.com/tisci/esd/latest/2_tisci_msgs/general/core.html#tisci-msg-query-fw-caps
> --
> Regards,
> Nishanth Menon
> Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D

Cheers

Marcel