Hi, On Sun, 5 Apr 2020 at 12:49, Clément Péron <peron.clem@xxxxxxxxx> wrote: > > Hi Sunxi maintainers and members, > > Now that required drivers are merged we can contibute on DVFS support for > Allwinner H6. > > This serie is based on Yangtao Li serie[0] and Megous works[1]. > > Most of the OPP tables are taken from original vendor kernel[2]. > Plus there is a new CPU frequency @1.8GHz. > > I wrote a simple script to randomly set a frequency during a random time[3]. > With this script and using stress-ng during a day I didn't see any issue. > Moreover I have tested specifically the 1.8GHz on my Beelink GS1, max thermal > 80°C is reached after ~10min and then the SoC oscillates quickly between 1.5 > and 1.8GHz. This result is wrong ignore it. I will resend new one in next serie. Regards, Clement > > I also test that that offlining CPU0 and doing DVFS on other CPUs works. > As CPU regulator is only set for CPU0. > > But maybe it doesn't cost much to set the regulator for all the CPUs? > > Jernej test the GPU devfreq on several H6 board particulary the Tanix TX6 which > doesn't have a proper dedicated PMIC and doesn't had any trouble with it. > > Do you think I can enable GPU OPP for all H6 Boards? > > Also Yangtao Li enable DVFS for OrangePi and Pine64, as I can't test them I > didn't reenable these boards. Please, let me know if you want me to add these > boards in this serie. > > Thanks, > Clément > > 0: https://patchwork.kernel.org/cover/10815117/ > 1: https://megous.com/git/linux/log/?h=ths-5.7 > 2: https://github.com/orangepi-xunlong/OrangePiH6_Linux4_9/blob/master/arch/arm64/boot/dts/sunxi/sun50iw6p1.dtsi#L345-L517 > 3: https://gist.github.com/clementperon/55a055dae3f13bbd14fb39c0069fe2e2 > > Clément Péron (4): > arm64: dts: allwinner: h6: set thermal polling time > arm64: dts: allwinner: h6: Add GPU Operating Performance Points table > arm64: configs: Enable sun50i cpufreq nvmem > arm64: dts: allwinner: h6: Enable CPU and GPU opp tables for Beelink > GS1 > > Ondrej Jirman (2): > arm64: dts: allwinner: h6: Add thermal trip points/cooling map > arm64: dts: allwinner: h6: Add CPU Operating Performance Points table > > Yangtao Li (1): > arm64: dts: allwinner: h6: Add clock to CPU cores > > .../dts/allwinner/sun50i-h6-beelink-gs1.dts | 10 +- > .../boot/dts/allwinner/sun50i-h6-cpu-opp.dtsi | 103 ++++++++++++++++++ > .../boot/dts/allwinner/sun50i-h6-gpu-opp.dtsi | 74 +++++++++++++ > arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 44 +++++++- > arch/arm64/configs/defconfig | 1 + > 5 files changed, 226 insertions(+), 6 deletions(-) > create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-h6-cpu-opp.dtsi > create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-h6-gpu-opp.dtsi > > -- > 2.20.1 >
