#linux-sunxi on 2022-03-01 — irc logs at oftc.irclog.whitequark.org

2021-07-26 22:56 ChanServ changed the topic of #linux-sunxi to: Allwinner/sunxi development - Did you try looking at our wiki? https://linux-sunxi.org - Don't ask to ask. Just ask and wait for an answer! - This channel is logged at https://oftc.irclog.whitequark.org/linux-sunxi

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18:27 <gamiee> jernej: hi, still no luck with cec, but even in userspace, cec-client can't find any device. (but IR rc-cec is here, so I guess that cec within kernel works)

18:28 <gamiee> (+ /sys/kernel/debug is empty so I can't check CEC status)

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19:01 <jernej> gamiee: I don't have rc-cec enabled

19:02 <gamiee> jernej: update, the CEC in userspace is working okay, and TV sees the device within BRAVIA Sync configuration

19:02 <jernej> but no luck with Crust CEC?

19:02 <gamiee> Yes

19:03 <gamiee> But this might be also problem of Bravia Sync, but even LG SIMPLINK didn't worked

19:04 <jernej> I suggest you try with LE nightly image

19:04 <jernej> if it works, check configuration, if not, something new needs to be done

19:09 <gamiee> jernej: Will try, also will try it again on LG TV

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19:10 <gamiee> also, you mentioned that any CEC command wakes up the device. If yes, then probably is something problem with crust, because via cec-ctl --monitor-all I see all commands sent, like "STANDBY"

19:12 <jernej> no, it's not any command

19:12 <jernej> and btw, Crust puts CEC controller in automatic mode

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19:13 <jernej> so it actually just signals that one of the commands, marked in wakeup trigger register, was received

19:17 <gamiee> got it working, looks like command sent by Sony Bravia CEC isn't within allowed commands to wake up.

19:17 <gamiee> I suspended the SBC, and sent "ACTIVE_SOURCE" command by switch channel on TV, and that woke up the SBC, so it all works

19:19 <jernej> nice!

19:20 <jernej> let me check which commands are selected

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19:21 <jernej> gamiee: all available commands are selected: https://github.com/crust-firmware/crust/blob/master/drivers/cec/dw-hdmi-cec.c#L38-L53

19:22 <gamiee> jernej: just was looking on that, so this is hard-coded within CEC Core, so there is no improvements possible to do (unless Crust will poll all messages and filter them)

19:22 <jernej> I believe "Image View On" is one that's usually sent at power on

19:22 <jernej> exactly

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20:06 <gamiee> jernej: I have one idea, I want to be able to tell Crust from Linux, to enable/disable wake up via IR or via CEC, I was thinking about sending custom SCPI message to Crust, and Crust will enable/disable it. Do you think this is best way? Also, what would be best way of storing this configuration? (or maybe easiest will be to Linux will send the configuration and every boot)

20:09 <jernej> I talked about that with smaeul, but no firm conclusion was reached

20:10 <jernej> vendor SCPI commands are possible, sure, as using RTC scratchpad registers, which is much easier to implement, but much more precious space...

20:11 <jernej> it would be probably possible to reserve some RAM region and read it before suspending it...

20:12 <jernej> many options but none of them really ideal

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20:27 <gamiee> hmm, from my side the vendor SCPI commands looks like the best way to do this, although, as far as I understand, I need somehow to send vendor PSCI message from Linux to u-boot, which afterwards send message to SCPI thus Crust.

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20:32 <gamiee> (mainly I'm looking now how to send PSCI command, best within userspace, but looks like there isn't any way, even I'm not sure if PSCI Spec supports vendor-specific messages)

20:33 <gamiee> But I found vendor-specific resets, which can be used for jumping into FEL or "factory mode?" for some usages.

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23:32 <smaeul> gamiee: PSCI is just one "service" provided by monitor mode/EL3 via the SMCCC. there's no custom PSCI commands, but you can add a custom service

23:32 <smaeul> see for example https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/tree/docs/components/arm-sip-service.rst

23:34 <smaeul> or actually this is a better doc: https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/tree/docs/getting_started/rt-svc-writers-guide.rst

23:36 <smaeul> for U-Boot, you would just add your functions to _psci_table