Re: [PATCH v2] init: Don't proxy `console=` to earlycon

[Petr Mladek]

On Wed 2024-09-11 12:35:14, Raul E Rangel wrote:
> Today we are proxying the `console=` command line args to the
> `param_setup_earlycon()` handler. This is done because the following are
> equivalent:
> 
>     console=uart[8250],mmio,<addr>[,options]
>     earlycon=uart[8250],mmio,<addr>[,options]
> 
> Both invocations enable an early `bootconsole`. `console=uartXXXX` is
> just an alias for `earlycon=uartXXXX`.
> 
> In addition, when `earlycon=` (empty value) or just `earlycon`
> (no value) is specified on the command line, we enable the earlycon
> `bootconsole` specified by the SPCR table or the DT.
> 
> The problem arises when `console=` (empty value) is specified on the
> command line. It's intention is to disable the `console`, but what
> happens instead is that the SPRC/DT console gets enabled.
> 
> This happens because we are proxying the `console=` (empty value)
> parameter to the `earlycon` handler. The `earlycon` handler then sees
> that the parameter value is empty, so it enables the SPCR/DT
> `bootconsole`.
> 
> This change makes it so that the `console` or `console=` parameters no
> longer enable the SPCR/DT `bootconsole`. I also cleans up the hack in
> `main.c` that would forward the `console` parameter to the `earlycon`
> handler.
> 
> Signed-off-by: Raul E Rangel <rrangel@xxxxxxxxxxxx>

It like this approach. It works well:

Reviewed-by: Petr Mladek <pmladek@xxxxxxxx>
Tested-by: Petr Mladek <pmladek@xxxxxxxx>

I could take it via the printk tree for 6.13. From my POV, it is too
late for 6.12. I am sorry I have been busy with the printk rework :-(

I am going to wait few days for another eventual review or taker.

Best Regards,
Petr