Re: u-boot debug, was: Re: U-boot on RPI3, sees disk but won't boot it

On Sun, Sep 25, 2022 at 03:57:34PM -0700, Mark Millard wrote:
> On 2022-Sep-25, at 12:34, bob prohaska <[email protected]> wrote:
> > 
> > . . .
> > 
> > IIRC I did try replacing the Sabrent enclosure with the Startech
> > enclosure, which worked and seemed to implicate the Sabrent as
> > the culprit.  Thus my interest in u-boot debug information.  
> 
> Looking at https://u-boot.readthedocs.io/en/latest/develop/logging.html
> it appears the logging availability has to be enabled at compile time:
> 
> QUOTE
> Enabling logging
> 
> The following options are used to enable logging
> at compile time:
> 
> 	??? CONFIG_LOG - Enables the logging system
> 	??? CONFIG_LOG_MAX_LEVEL - Max log level to
> 		build (anything higher is compiled out)
> 	??? CONFIG_LOG_CONSOLE - Enable writing log
> 		records to the console
> 
> If CONFIG_LOG is not set, then no logging will be available.
> 
> The above have SPL and TPL versions also, e.g.
> CONFIG_SPL_LOG_MAX_LEVEL and CONFIG_TPL_LOG_MAX_LEVEL.
> 
> If logging is disabled, the default behaviour is to output
> any message at level LOGL_INFO and below. If logging is
> disabled and DEBUG is defined (at the very top of a C file)
> then any message at LOGL_DEBUG will be written.
> END QUOTE
> 

I looked at the page but didn't understand where/how to set
those parameters. Do they go in a configuration or Makefile 
somewhere?  I tried using 
setenv CONFIG_LOG 1
setenv CONFIG_LOG_CONSOLE 1
setenv CONFIG_LOG_MAX_LEVEL 4

[The numbers were guessed at] 

All showed up in an env command, but the the resulting u-boot.bin
executable did not change size and behaves as before. 

Apologies if I'm being dense!

bob prohaska