Hi Sean, On Sat, Jul 28, 2018 at 10:29:31AM +0100, Sean Young wrote: > Hi Hias, > > On Sat, Jul 21, 2018 at 08:13:27PM +0200, Matthias Reichl wrote: > > Hi Sean, > > > > thanks a lot, this is a really nice new feature! > > Thank you for testing it and finding all those issues, it has become much > better from your testing. > > > On Fri, Jul 13, 2018 at 03:30:06PM +0100, Sean Young wrote: > > > Once kernel v4.18 is released with IR BPF decoding, this can be merged > > > to v4l-utils. > > > > > > The idea is that IR decoders can be written in C, compiled to BPF relocatable > > > object file. Any global variables can overriden, so we can supports lots > > > of variants of similiar protocols (just like in the lircd.conf file). > > > > > > The existing rc_keymap file format can't be used for variables, so I've > > > converted the format to toml. An alternative would be to use the existing > > > lircd.conf file format, but it's a very awkward file to parse in C and it > > > contains many features which are irrelevant to us. > > > > > > We use libelf to load the bpf relocatable object file. > > > > > > After loading our example grundig keymap with bpf decoder, the output of > > > ir-keytable is: > > > > > > Found /sys/class/rc/rc0/ (/dev/input/event8) with: > > > Name: Winbond CIR > > > Driver: winbond-cir, table: rc-rc6-mce > > > LIRC device: /dev/lirc0 > > > Attached BPF protocols: grundig > > > Supported kernel protocols: lirc rc-5 rc-5-sz jvc sony nec sanyo mce_kbd rc-6 sharp xmp imon > > > Enabled protocols: lirc > > > bus: 25, vendor/product: 10ad:00f1, version: 0x0004 > > > Repeat delay = 500 ms, repeat period = 125 ms > > > > > > Alternatively, you simply specify the path to the object file on the command > > > line: > > > > > > $ ir-keytable -e header_pulse=9000,header_space=4500 -p ./pulse_distance.o > > > > > > Derek, please note that you can now convert the dish lircd.conf to toml > > > and load the keymap; it should just work. It would be great to have your > > > feedback, thank you. > > > > I did a few tests with one of my RC-5 remotes, this lircd.conf file > > https://github.com/PiSupply/JustBoom/blob/master/LIRC/lircd.conf > > and kernel 4.18-rc5 on RPi2, with the 32bit ARM kernel and > > gpio-ir-recv, and on LePotato / aarch64 with meson-ir. > > > > lircd2toml.py did a really good job on converting it, the only > > thing missing was the toggle_bit. > > Right, there was a bug in lirc2html.py. I've added a fix to my bpf branch: > > https://git.linuxtv.org/syoung/v4l-utils.git/log/?h=bpf Thanks a lot, lircd2toml.py now also seems to detect that the lircd.conf uses the rc-5 protocol and uses the rc-5 decoder - that's really nice! > > When testing the converted toml (with "toggle_bit = 11" added > > and the obvious volume keycode fixes) I noticed a couple of issues: > > > > Buttons seem to be "stuck". The scancode is decoded, key_down > > event is generated, but after release the key_down events repeat > > indefinitely - with the built-in rc-5 decoder this works fine. > > > > root@upstream:/home/hias/ir-test# ir-keytable -c -w justboom.toml -t > > Old keytable cleared > > Wrote 12 keycode(s) to driver > > Protocols changed to > > Loaded BPF protocol manchester > > Testing events. Please, press CTRL-C to abort. > > 29.065820: lirc protocol(66): scancode = 0x141b > > 29.065890: event type EV_MSC(0x04): scancode = 0x141b > > 29.065890: event type EV_KEY(0x01) key_down: KEY_DOWN(0x006c) > > 29.065890: event type EV_SYN(0x00). > > 29.570059: event type EV_KEY(0x01) key_down: KEY_DOWN(0x006c) > > 29.570059: event type EV_SYN(0x00). > > 29.710062: event type EV_KEY(0x01) key_down: KEY_DOWN(0x006c) > > 29.710062: event type EV_SYN(0x00). > > 29.850057: event type EV_KEY(0x01) key_down: KEY_DOWN(0x006c) > > 29.850057: event type EV_SYN(0x00). > > 29.990057: event type EV_KEY(0x01) key_down: KEY_DOWN(0x006c) > > 29.990057: event type EV_SYN(0x00). > > 30.130055: event type EV_KEY(0x01) key_down: KEY_DOWN(0x006c) > > 30.130055: event type EV_SYN(0x00). > > ... > > Thanks, I had not seen this yet either. There is a fix here: > > https://www.mail-archive.com/linux-media@xxxxxxxxxxxxxxx/msg133813.html Thanks, the patch seems to fix it, I posted a small nit in the thread. > > Even scancodes, eg KEY_UP / scancode 0x141a, aren't decoded at > > all, only odd scancodes work. My guess is the manchester decoder > > could have a problem when the last bit is zero and the message > > doesn't end with a pulse, but a (rather long) timeout. > > Yep, yet another bug! I'v added a fix here: > > https://git.linuxtv.org/syoung/v4l-utils.git/log/?h=bpf Thanks, using the manchester decoder with rc-5 looks fine now! > > (Re-)loading a bpf decoder only works 8 times. The 9th attempt > > gives an error message. > > > > # for i in `seq 1 9` ; do ir-keytable -p manchester ; done > > Protocols changed to > > Loaded BPF protocol manchester > > Protocols changed to > > Loaded BPF protocol manchester > > Protocols changed to > > Loaded BPF protocol manchester > > Protocols changed to > > Loaded BPF protocol manchester > > Protocols changed to > > Loaded BPF protocol manchester > > Protocols changed to > > Loaded BPF protocol manchester > > Protocols changed to > > Loaded BPF protocol manchester > > Protocols changed to > > Loaded BPF protocol manchester > > Protocols changed to > > failed to create a map: 1 Operation not permitted > > Loaded BPF protocol manchester > > There was a bug where bpf programs were leaked on detach. Unfortunately > the fix had not made it to the branch when you were testing. > > https://www.mail-archive.com/linux-media@xxxxxxxxxxxxxxx/msg133273.html Thanks, this fixed worked, too! Work is keeping me busy ATM but I'll see if I find some time to do a few more tests. So far it's already looking very good! so long, Hias
