On Tue, Jan 25, 2022 at 11:47:11AM +0100, Peter Zijlstra wrote: > On Tue, Jan 25, 2022 at 10:51:00AM +0200, Mathias Nyman wrote: > > On 24.1.2022 18.46, Peter Zijlstra wrote: > > > > FYI, I'm thinking early_xdbc_parse_parameter should've now given > > > dpgp_num: 1 ? > > > > > > > Yes, it should. > > > > Looks like there's a parsing issue. > > "earlyprintk=xdbc1,keep" fails on our Tigerlake as well. > > > > Without the "keep" option it works for me: > > > > [ 0.000000] Command line: console=ttyS0,115200n8 buildroot_hostname=tgl04 earlyprintk=xdbc1 dmi_entry_point=0x74374000 > > [ 0.000000] xhci_dbc:early_xdbc_parse_parameter: dbgp_num: 1 > > [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-5.16.0+ root=UUID=a652986c-fbc6-4341-85c3-b4ad4402f130 ro debug ignore_loglevel sysrq_always_enabled usbcore.autosuspend=-1 earlyprintk=xdbc1,keep force_early_printk sched_verbose ft > race=nop mitigations=off nokaslr > > [ 0.000000] xhci_dbc:early_xdbc_parse_parameter: dbgp_num: 1 > > [ 0.399988] xhci_dbc:xdbc_start: DbC is running now, control 0x8d000003 port ID 15 > [ 0.399998] xhci_dbc:xdbc_handle_port_status: connect status change event > [ 0.399999] xhci_dbc:xdbc_handle_port_status: port reset change event > [ 0.431217] printk: console [earlyxdbc0] enabled > > Success!! I'll go submit proper patches for this then. Next up, I don't suppose there's working patches for GRUB ? Because the moment the thing gets stuck on a non-working kernel I'm screwed again :/
