[PATCH u-boot-marvell v3 00/39] kwboot higher baudrate

[Marek Behún]

On Fri, 1 Oct 2021 12:09:04 +0200
Pali Rohár <pali at kernel.org> wrote:

> Hello!
> 
> On Friday 01 October 2021 11:58:14 Stefan Roese wrote:
> > I checked by quickly starting a terminal app and it does not seem that
> > the CPU did go through a reboot. Nothing on the UART at this stage.
> > 
> > BUT:
> > The tests I did in this mail were done with your 39 patches applied
> > on top of "master-kwboot" [1]. Here booting with 115k works as explained
> > below.
> > 
> > Now I applied the same 39 patches on top of "next" [2]. And here not
> > even booting with 115k works on my AXP target. It always hangs at this
> > stage:  
> 
> So default baudrate 115200 works fine on master+39patches and does not
> work on next+39patches? Could you check if it works on next without
> applying any patch?

This seems as if the ACK was not sent by the BootROM.

Stefan, could you apply the patch below, recompile and then send the output again?

diff --git a/tools/kwboot.c b/tools/kwboot.c
index 6a1a030308..d433ec6d9c 100644
--- a/tools/kwboot.c
+++ b/tools/kwboot.c
@@ -865,6 +865,7 @@ kwboot_xm_recv_reply(int fd, char *c, int allow_non_xm, int *non_xm_print,
 	while (1) {
 		rc = kwboot_tty_recv(fd, c, 1, timeout);
 		if (rc) {
+			printf("rc=%i errno=%i allow_non_xm=%i *non_xm_print=%i\n", rc, errno, allow_non_xm, allow_non_xm ? *non_xm_print : -1);
 			if (errno != ETIMEDOUT)
 				return rc;
 			else if (allow_non_xm && *non_xm_print)