On Sun, 1 Sep 2019 at 15:19, Jaafar Ali <jaafarkhalaf@xxxxxxxxx> wrote: > > Dear Sylwester, > Kernel 5.3rc1 > Hardware Odroid-XU4 > cpuidle-big_little driver for exynos 5422 of odroid-xu3/4 is not working. > when I enable it in the defconfig , CONFIG_ARM_BIG_LITTLE_CPUIDLE=y, > the device will not boot and the heartbeat blue LED stops. > when the powerdown state[1] is removed form cpuidle-big_little driver > or the function bl_enter_powerdown is disabled by early return, the > kernel boots successfully and I can see cpuidle driver inside > /sys/devices/system/cpu/cpuidle/current_driver > both cpuidle-big_little power down state (exynos5420) and suspend > stuff are using mcpm_cpu_suspend() which in turn calls > mcpm_cpu_power_down() eventually. > while suspend stuff is working correctly and the cpu can > suspend/resume without problems, the cpuidle-bl is not working > the few difference between suspend.c and cpuidle-big_little that I > found are suspend.c do some more preparations such as storing resume > entry point "mcpm_entry_point" into S5P_INFORM0, reset > EXYNOS5420_CPU_STATE and save and restore some other registers. > Can we repeat the scenario of suspend in cpuidle-big_little Hi Jaafar, Thank you for the report. I am not sure whether big-little cpuidle was working properly before... (before v5.3-rc1) I added your report to https://exynos.wiki.kernel.org/todo_tasks Best regards, Krzysztof
