RE: [PATCH 1/2] arm: mach-k3: am642: Update MAIN UART1 serial alias from 3 to 1

["Mahaveer, Vishal" <vishalm@ti.com>]

> 
> On 6/16/26 2:24 PM, Bryan Brattlof wrote:
> > On June 16, 2026 thus sayeth Wadim Egorov:
> >> Hi,
> >>
> >> On 6/5/26 9:38 PM, Vishal Mahaveer wrote:
> >>> The upstream device tree changed the serial alias for MAIN UART1
> >>> from
> >>
> >> upstream where? Can you point me to the related change?
> >>
> >
> > Hmm a quick scan through the history nothing seems to be standing out.
> > Serial1 looks to have always been where DMSC put its traces. I wonder
> > if this was ever working.
> 
> Our boards do not reserve the main_uart1. But so far we never noticed any
> strange behavior on it. Maybe because no tracing is enabled per default?
> I wonder if we can change the uart DMSC is using?

Yes, it is disabled by default. Tracing is only enabled during debug.

The UART used for SYSFW tracing is fixed.
But, there are other means to get traces like trace memory buffer and ITM.

https://software-dl.ti.com/tisci/esd/latest/4_trace/trace.html

> 
> 
> >
> > I'll try to see if older versions worked but I'm thinking we may need:
> >
> >    Fixes: d2edabfa8de5 ("arm: mach-k3: am642: Load SYSFW binary and
> > config from boot media")
> >
> > ~Bryan