#linux-rockchip on 2017-04-21 — irc logs at freenode.irclog.whitequark.org

2014-10-07 12:46 ChanServ changed the topic of #linux-rockchip to: Rockchip development discussion | Wiki at http://linux-rockchip.info | Logs at http://irclog.whitequark.org/linux-rockchip | ML at http://groups.google.com/group/linux-rockchip

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01:05 <chatter29> hey guys

01:06 <chatter29> allah is doing

01:06 <chatter29> sun is not doing allah is doing

01:06 <chatter29> to accept Islam say that i bear witness that there is no deity worthy of worship except Allah and Muhammad peace be upon him is his slave and messenger

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17:00 <vagrantc> anyone have any luck getting a serial console on firefly-rk3399?

17:00 <vagrantc> i'm just getting gibberish

17:01 <vagrantc> http://wiki.t-firefly.com/index.php/Firefly-RK3399/Serial_debug/en

17:01 <vagrantc> suggests to use a really high baud rate, but that didn't help

17:03 <vagrantc> 1500000

17:03 <beeble> don't own a firefly, but the default uart2 baud rate is 1500000 baud

17:04 <vagrantc> 115200 just isn't fast enough :)

17:05 <beeble> with mainline uboot the baudrate is configurable

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17:07 <vagrantc> working on mainline u-boot + firefly-rk3399 patches and mainline linux + patches ...

17:07 <vagrantc> maybe there's nothing on the eMMC and it's trying to boot over serial?

17:08 <vagrantc> guess i should try to plug a monitor and keyboard in and see what that's doing

17:08 <beeble> fallback is usb loader

17:08 <beeble> and there is no serial output as long as you don't load something

17:09 <maz> vagrantc: things like minicom and co don't seem to manage 1.5Mbaud. cu works though.

17:09 <vagrantc> i'm using screen

17:09 <beeble> current picocom (best to build from source) does support it too

17:09 <maz> vagrantc: you're out of luck.

17:09 <vagrantc> i see.

17:10 <beeble> vagrantc: CONFIG_BAUDRATE with mainline uboot

17:10 <maz> vagrantc: or you can try using screen, and use stty to reconfigure the line from outside the session.

17:10 <beeble> via menuconfig

17:11 <vagrantc> beeble: i've not even gotten to the point of installing anything ... first i want to see what's there already

17:11 <maz> a mainline u-boot us definitely the best solution, as what is provided with the board is...erm...

17:11 <beeble> if you really need slower speed

17:12 <vagrantc> slower speed would be nice to be able to use screen/cereal and so on

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17:24 <Hgfg> Anyone knows how to underclock rk3399 in dts file? For example 1GHz for faster cores.

17:25 <beeble> you want to limit to 1ghz?

17:27 <Hgfg> Yes, and check how temperature looks then

17:27 <beeble> rewrite the cluster0 opp table

17:28 <beeble> if it's just for testing comment out the 1.2 and 1.4ghz points in rk3399-opp.dtsi

17:29 <vagrantc> maz: FTW: cu

17:29 <vagrantc> maz: thanks!

17:29 * vagrantc ponders getting screen patched to support 1500000

17:29 <Hgfg> This dtsi looks very unclear for me , but I will try

17:29 <Hgfg> Many thanks

17:31 <beeble> Hgfg: you should be able to set it via cpufreq-set too

17:31 <beeble> but what do you want to test? because by default the interactive governor is active

17:32 <Hgfg> I would like to test if its possible to run this soc without heatsink

17:32 <vagrantc> gah. the built-in u-boot has a bootdelay of 0

17:32 <beeble> and so as long as you don't run anything that demands a lot of cpu it will switch down to the lowest frequeny point

17:32 <Hgfg> In production environment

17:34 <beeble> and the a72 are a lot more demanding then the a53

17:34 <beeble> powerwise

17:35 <Hgfg> Is it possible to switch a72 off conpletely?

17:35 <beeble> and if you are not planing to run full throttle with 100% cpu all the time

17:35 <beeble> it's better to have it run at higher clock and the ondemand or interactive governor

17:36 <beeble> see race to idle as keyword for a google search

17:36 <Hgfg> Many thanks

17:36 <beeble> yes you can turn them off. but in that case, why using a rk3399?

17:37 <beeble> the a72 are one of the big sellingpoints

17:37 <Hgfg> Because i could use this platform in many cases, less human resources I need

17:38 <Hgfg> And sometimes there is no place for heatsink

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17:43 <beeble> Hgfg: the kernel already does thermal throtteling btw. so depending on the soc temperature it will select the highest possible frequency

17:43 <beeble> thats also in the opp.dtsi

17:45 <beeble> expect about 8W if you do a dead simple benchmark like 6 busy idle loops

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18:08 <clone147> hi all

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22:45 <vagrantc> so, i've created a arm-trusted-firmware rk3399 bl31.bin and it's about 140k ...

22:46 <vagrantc> but when i copy that file to somewhere else, it grows to more that 1GB ...

22:46 * vagrantc squints

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23:44 <vagrantc> hrm. rkflashtool doesn't quite work: rkflashtool: info: rkflashtool v5.2

23:44 <vagrantc> rkflashtool: info: interface claimed

23:44 <vagrantc> rkflashtool: info: Detected RK3399...

23:44 <vagrantc> libusb: error [submit_bulk_transfer] submiturb failed error -1 errno=2

23:45 <vagrantc> and then hangs