Missing CPU frequencies

Chip Platform Rockchip
1

The top operating frequencies for both big and little cores appear to be missing:

firefly@firefly:~$ cat /sys/devices/system/cpu/cpu4/cpufreq/scaling_available_frequencies
408000 600000 816000 1008000 1200000 1416000 1608000 1800000
firefly@firefly:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
408000 600000 816000 1008000 1200000 1416000

The device tree indicates the support here:
https://gitlab.com/TeeFirefly/linux-kernel/blob/9f76a6185a72bb87f567551f5bc664ed317f999d/arch/arm64/boot/dts/rockchip/rk3399-opp.dtsi#L133-137

		opp@1992000000 {
			opp-hz = /bits/ 64 <1992000000>;
			opp-microvolt = <1225000>;
			clock-latency-ns = <40000>;
		};

https://gitlab.com/TeeFirefly/linux-kernel/blob/9f76a6185a72bb87f567551f5bc664ed317f999d/arch/arm64/boot/dts/rockchip/rk3399-opp.dtsi#L81-85

		opp@1512000000 {
			opp-hz = /bits/ 64 <1512000000>;
			opp-microvolt = <1125000>;
		clock-latency-ns = <40000>;
			};

Are these frequencies omitted because they are unstable or due to an oversight?

2

if you update the kernel/resource image by making it yourself ,then the missing part will show up.

3

Using the latest kernel does provide the missing frequencies. I also confirmed a performance increase when using the frequencies.

4

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