> On 19 Apr 2020, at 1:42 am, Tim Lewis <elatllat@xxxxxxxxx> wrote: > > Odroid N2 has a large heatsink and HardKernel supports overclock > through the addition to extra opp points in their official kernel > sources [1]. Add these to the N2 dts only, as other S922X devices > may not have suitable heatsinks. > > [1] https://github.com/hardkernel/linux/commit/f86cd9487c7483b2a05f448b9ebacf6bd5a2ad2f > Signed-off-by: Tim Lewis <elatllat@xxxxxxxxx> Kodi is not a demanding workload, but the extra opp points are being used: N2:~ # cat /sys/devices/system/cpu/cpufreq/policy0/stats/trans_table From : To : 100000 250000 500000 667000 1000000 1200000 1398000 1512000 1608000 1704000 1896000 1992000 100000: 0 20465 294 81 47 0 1 0 0 0 0 183 250000: 20388 0 161 52 59 0 0 0 1 0 1 169 500000: 199 256 0 9 47 1 2 0 0 0 0 57 667000: 177 50 10 0 284 1 1 0 0 0 0 136 1000000: 230 12 15 284 0 1 2 0 0 0 0 285 1200000: 0 0 0 1 0 0 0 0 0 1 0 2 1398000: 1 1 0 2 0 0 0 0 1 1 0 3 1512000: 0 0 0 0 0 0 0 0 0 1 0 2 1608000: 0 0 0 0 0 0 0 1 0 0 0 2 1704000: 0 1 0 0 0 0 1 0 0 0 0 2 1896000: 0 0 1 0 0 0 0 0 0 0 0 1 1992000: 76 47 90 230 392 0 2 2 1 1 1 0 N2:~ # cat /sys/devices/system/cpu/cpufreq/policy2/stats/trans_table From : To : 100000 250000 500000 667000 1000000 1200000 1398000 1512000 1608000 1704000 1800000 1908000 100000: 0 1698 130 76 87 0 0 0 1 0 1 199 250000: 1655 0 25 15 357 1 2 0 1 0 0 12 500000: 258 54 0 50102 30 3 1 0 0 0 1 32 667000: 267 151 49708 0 77 3 0 0 0 0 0 11 1000000: 3 5 525 15 0 3 2 0 1 1 0 6 1200000: 0 2 1 2 2 0 3 0 0 0 1 4 1398000: 1 0 1 1 4 0 0 1 1 0 2 2 1512000: 0 0 0 0 0 0 1 0 0 0 0 1 1608000: 1 0 0 1 0 1 0 0 0 0 0 3 1704000: 0 0 0 0 0 1 0 1 0 0 0 1 1800000: 0 0 1 1 0 0 1 0 1 0 0 1 1908000: 8 158 90 4 3 3 3 0 1 2 0 0 Board boots in under 4 seconds, Kodi home-screen in about 7 seconds. I haven’t seen the N2 rise over 44ºC. I’ve also tested some S922X box devices (moving the change to meson-g12b-s922x.dtsi) and no obvious issues. Tested-by: Christian Hewitt <christianshewitt@xxxxxxxxx> > --- > .../boot/dts/amlogic/meson-g12b-odroid-n2.dts | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts > index 42f154057..6f32ac83f 100644 > --- a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts > +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts > @@ -260,6 +260,25 @@ > }; > }; > }; > + > + cpu_opp_table_0: opp-table-0 { > + opp-1992000000 { > + opp-hz = /bits/ 64 <1992000000>; > + opp-microvolt = <1001000>; > + }; > + }; > + > + cpub_opp_table_1: opp-table-1 { > + opp-1800000000 { > + opp-hz = /bits/ 64 <1800000000>; > + opp-microvolt = <981000>; > + }; > + > + opp-1908000000 { > + opp-hz = /bits/ 64 <1908000000>; > + opp-microvolt = <1022000>; > + }; > + }; > }; > > &arb { > -- > 2.17.1 >
