The am62lxx SoC default UART is ttyS0 since it doesn't have the R5 cores taking up a UART. The k3 default SERIAL_CONSOLES inherited includes ttyS2, which causes systemd to wait indefinitely for a console that never appears, significantly increasing boot time and degrading user experience.
Override SERIAL_CONSOLES to specify only ttyS0, allowing the boot process to proceed normally without waiting for unavailable consoles. Signed-off-by: Yogesh Hegde <[email protected]> --- v2 Changes: - moved SERIAL_CONSOLES override to include/am62lxx.inc --- Boot time is increased from 33s to 2m18s. Boot time is measured from power on to TI LVGL demo running on HDMI Display. Logs: root@am62lxx-evm:~# systemd-analyze critical-chain ti-lvgl-demo.service The time when unit became active or started is printed after the "@" character. The time the unit took to start is printed after the "+" character. ti-lvgl-demo.service @1min 32.588s `-multi-user.target @1min 32.577s `-getty.target @1min 32.575s `-serial-getty@... @13.002s `-systemd-user-sessions.service @10.847s +660ms `-network.target @10.582s `-systemd-networkd.service @8.748s +1.799s `-network-pre.target @8.735s `-iptables.service @7.477s +920ms `-basic.target @7.363s `-dbus-broker.service @6.661s +466ms `-dbus.socket @6.310s +434us `-sysinit.target @6.263s `-systemd-vconsole-setup.service @18.198s +391ms `-systemd-journald.socket @2.781s +335us `-system.slice @1.282s `--.slice @1.282s >From the time analysis log, `getty.target` takes 1min 32 secs to bootup due to serial-getty@... failed. This service fails because there is no hardware associated with ttyS2. --- meta-ti-bsp/conf/machine/include/am62lxx.inc | 2 ++ 1 file changed, 2 insertions(+) diff --git a/meta-ti-bsp/conf/machine/include/am62lxx.inc b/meta-ti-bsp/conf/machine/include/am62lxx.inc index 12c8d6ea..26abe479 100644 --- a/meta-ti-bsp/conf/machine/include/am62lxx.inc +++ b/meta-ti-bsp/conf/machine/include/am62lxx.inc @@ -3,6 +3,8 @@ SOC_FAMILY:append = ":am62lxx" MACHINE_FEATURES += "screen" +SERIAL_CONSOLES = "115200;ttyS0" + TFA_BOARD = "am62lx" TFA_K3_SYSTEM_SUSPEND = "1" TFA_PLATFORM = "k3low" -- 2.34.1
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