Re: u-boot debug, was: Re: U-boot on RPI3, sees disk but won't boot it
Mark Millard <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.arm |
|---|---|
| Message-ID | <[email protected]> |
On 2022-Sep-27, at 19:13, Mark Millard <[email protected]> wrote: > On 2022-Sep-27, at 18:57, bob prohaska <[email protected]> wrote: > >> On Tue, Sep 27, 2022 at 05:14:54PM -0700, Mark Millard wrote: >>> On 2022-Sep-27, at 16:29, bob prohaska <[email protected]> wrote: >>> >>>> On Tue, Sep 27, 2022 at 03:27:10PM -0700, Mark Millard wrote: >>>>> . . . >>>> . . . >>>> U-Boot> usb reset >>>> resetting USB... >>>> Bus usb@7e980000: dwc2_usb usb@7e980000: Can't get reset: -2 >>>> USB DWC2 >>>> scanning bus usb@7e980000 for devices... 6 USB Device(s) found >>>> scanning usb for storage devices... 1 Storage Device(s) found >>>> U-Boot> >>>> >>>> Issuing >>>> U-Boot> run bootcmd_usb0 >>>> >>>> Device 0: >>>> >>>> [tens of seconds pause, looks like u-boot started over] >>>> >>>> U-Boot 2022.04 (Sep 27 2022 - 15:47:57 -0700) >>> . . . >>> >>> Do you have RPi* firmware debug output ennabled such that >>> you would see messages from it if the RPi* firmware started >>> over? >>> >> I do now, enable_uart=1 is set in config.txt > > Good. Beyond enable_uart=1 there is, quoting from: https://github.com/raspberrypi/firmware/issues/1301 QUOTE "uart_2ndstage=1" causes the second-stage loader (bootcode.bin, Pi 4 EEPROM) and the main firmware (start*.elf) to output diagnostic information to UART0. Output is likely to interfere with Bluetooth operation unless disabled ("dtoverlay=disable-bt") or switched to the other UART ("dtoverlay=miniuart-bt"), and if the UART is accessed simultaneously to output from Linux then data loss could occur, so this is not a feature to activate except when trying to diagnose a loading problem. END QUOTE It is possible that this extra output might put out messages about watchdog activity if such is involved in the restarts. For the current purposes, dtdebug=1 probably does not provide anything of interest. But it is available to enable as well. === Mark Millard marklmi at yahoo.com