Hi Ye, Yes, I can boot SPL without signature. I also added some debug messages to my build and I can see that SPL can load u-boot proper via USB until 'Jumping to U-Boot' message in board_init_r function (common/spl/spl.c)
Actually this looks like the SError problem caused by errata ERR050350 which has been worked around in patch 2f3c92060dcd. But that patch is currently active in u-boot and so I don't understand what the problem is here in this case. Best regards, Thomas -----Ursprüngliche Nachricht----- Von: Ye Li <ye...@nxp.com> Gesendet: Donnerstag, 11. Januar 2024 05:09 An: Peng Fan (OSS) <peng....@oss.nxp.com>; Thomas Schaefer <thomas.schae...@kontron.com>; 'u-boot@lists.denx.de' <u-boot@lists.denx.de> Cc: Peng Fan <peng....@nxp.com> Betreff: RE: FIELD_RETURN on i.MX8MNANOLPD4 EVK [You don't often get email from ye...@nxp.com. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] I think there is no particular SW support needed for FIELD_RETURN on 8MN. From what you described, you have moved the part from closed to FIELD_RETURN. So are you able to boot into SPL without signature? Best regards, Ye Li > -----Original Message----- > From: Peng Fan (OSS) <peng....@oss.nxp.com> > Sent: Thursday, January 11, 2024 11:51 AM > To: Thomas Schäfer <thomas.schae...@kontron.com>; 'u-boot@lists.denx.de' > <u-boot@lists.denx.de>; Ye Li <ye...@nxp.com> > Cc: Peng Fan <peng....@nxp.com> > Subject: Re: FIELD_RETURN on i.MX8MNANOLPD4 EVK > > +Ye > > 在 1/9/2024 4:52 PM, Thomas Schaefer 写道: > > Hi all, > > > > We are trying to enable FIELD RETURN on the NXP i.MX8MNano LPD4 EVK > board. > > > > We enabled Secure Boot in u-boot in the first step. After checking > > proper > execution of a signed bootloader image we closed the board blowing the > SEC_CONFIG fuse. > > > > In the next step we created the board specific signature with UID of > > the CPU > included to remove the FIELD RETURN lock. After that we were able to > blow the FIELD_RETURN fuse with 'fuse prog 8 3 0x1' command. But now, > the board cannot boot any more, it will hang after execution of the SPL > bootloader part. > > > > We can observe this behavior with both signed and unsigned > > bootloader > images. > > > > Is the FIELD_RETURN feature for the i.MX8MNano supported with u-boot > v2024.01? > > > > Best regards, > > Thomas > > > > > > Thomas Schäfer > > SW Design Engineer > > > > thomas.schae...@kontron.com > > https://eur04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww > > .kontron.com%2F&data=05%7C02%7Cthomas.schaefer%40kontron.com%7C7eb38 > > f57a0304f030f2f08dc125b1c74%7C8c9d3c973fd941c8a2b1646f3942daf1%7C0%7 > > C0%7C638405429733492095%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAi > > LCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata > > =nOuWb2NSpPBRl5FaV8xa5MiQZ%2FzE7z8F%2FC2Rfv%2F7yzo%3D&reserved=0 > > > > > > > > > > Kontron Europe GmbH > > Heinrich-Barth-Straße 1-1a | 66115 Saarbrücken | Germany
