i.MX8QXP hangs in SPL after a "reboot" command

[Fabio Estevam]

On Thu, Apr 2, 2020 at 4:21 PM Fabio Estevam <festevam at gmail.com> wrote:

> U-Boot SPL 2020.04-rc4-00061-ge0718b3ab7 (Apr 02 2020 - 16:14:22 -0300)
> Normal Boot
> WDT:   Not found!
> Trying to boot from MMC2_2
> spl: mmc init failed with error: -70
> SPL: failed to boot from all boot devices
> ### ERROR ### Please RESET the board ###

I added the following debug line:

--- a/drivers/mmc/fsl_esdhc_imx.c
+++ b/drivers/mmc/fsl_esdhc_imx.c
@@ -499,6 +499,7 @@ static int esdhc_send_cmd_common(struct
fsl_esdhc_priv *priv, struct mmc *mmc,
        irqstat = esdhc_read32(&regs->irqstat);

        if (irqstat & CMD_ERR) {
+               printf("****** -ECOMM comming from 1\n");
                err = -ECOMM;
                goto out;
        }

And this is what I got after issuing a 'reboot' command in Linux:

# reboot
# Stopping network: OK
Saving random seed: [    5.255229] random: dd: uninitialized urandom
read (512 bytes read)
OK
Stopping klogd: OK
Stopping syslogd: OK
umount: devtmpfs busy - remounted read-only
[    5.309631] EXT4-fs (mmcblk1p2): re-mounted. Opts: (null)
The system is going down NOW!
Sent SIGTERM to all processes
Sen[    7.318988] kvm: exiting hardware virtualization
[    7.339445] reboot: Restarting system

U-Boot SPL 2020.04-rc4-00062-g1e193557d5-dirty (Apr 04 2020 - 10:14:43 -0300)
Normal Boot
WDT:   Not found!
Trying to boot from MMC2_2
****** -ECOMM comming from 1
****** -ECOMM comming from 1
spl: mmc init failed with error: -70
SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###

Any ideas as to why CMD_ERR bit is being set in the irqstat register?

Thanks