Gpio-IR-Receiver doesn't work with latest start_x.elf

[mrniceplay]

Gpio-IR-Receiver doesn't work with latest start_x.elf.
The start.elf of Openelec 4.07 works without problems.
If i boot with the old start.elf and then boot with the new start.elf the gpio-ir-receiver works also. If i had disconnected power and hdmi the new start.elf doesn't work anymore.

[popcornmix]

How is the IR receiver connected? Which GPIO pin are you using?

[mrniceplay]

The TSOP-IR-receiver is connected directly to GPIO pin1, pin6 and pin12 (GPIO18).
Dmesg shows the receiver is recognized and the driver is loaded.

[mrniceplay]

The start.elf of Openelec4.1.1 is the last working one. OE4.1.2 and newer doesn't work.

[popcornmix]

Could you post the output of
vcgencmd version
for the non-working and working start.elf.

[mrniceplay]

Sep 19 2014 16:49:58
Copyright (c) 2012 Broadcom
version 193e6925ff92741775b3893fbd95bb8b6dc41e41 (clean) (release)

[popcornmix]

Is that the working or non-working version?
I would like to identify the first start.elf that has the problem and see what the changes were.

[mrniceplay]

This is the non working version.

[mrniceplay]

OOps, that was the last version! (OE4.2.0)
Here comes the first non working version(OE4.1.2) :
Jul 15 2014 17:53:13
Copyright (c) 2012 Broadcom
version ad89e56fcfdce27003bb1c722534d117d4bebf06 (clean) (release)

maybe there are firmware versions between working OE4.1.1 and non working OE4.1.2, i don't know!

[mrniceplay]

Here comes the last working version(OE4.1.1) :
Jul 5 2014 19:03:42
Copyright (c) 2012 Broadcom
version cb433d55f9f5b29b59968019e3b54802894af489 (clean) (release)

[popcornmix]

Looks like the gpioman commit. What version of pi (e.g. rev1/rev2/B+?)

[mrniceplay]

Should be model B rev2

cat /proc/cpuinfo
processor : 0
model name : ARMv6-compatible processor rev 7 (v6l)
BogoMIPS : 2.00
Features : swp half thumb fastmult vfp edsp java tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xb76
CPU revision : 7

Hardware : BCM2708
Revision : 000d
Serial : 00000000b28c98cb

[ghollingworth]

Revision '0xd' is not a valid revision... Could you upload a photo of the Pi (both sides) this will enable us to identify the manufacturer and test results for that device

Thanks

Gordon

[popcornmix]

0xd is reported as:
000d Q4 2012 B 2.0 512MB (Mfg by Egoman)
http://elinux.org/RPi_HardwareHistory

[popcornmix]

GPIO18 should be a default pin on rev2:

                     polarity = "active_high";
                     termination = "pull_down";
                     startup_state = "inactive";
                     function = "input";

with a drive strength of 8. Previously it had:

   { GPIO_POLARITY_ACTIVE_HIGH, GPIO_TERMINATION_NO_PULLING, GPIO_TERMINATION_NO_PULLING, GPIO_PIN_STATE_INACTIVE, GPIO_FUNCTION_INPUT,    GPIO_DEFAULT_DRIVE_STRENGTH  },

so was floating rather than pulled down.

We believe the (weak) pull down applied to inputs as a default is the better behaviour.

Can you try placing this file on boot partition of sdcard:
https://drive.google.com/file/d/0B-6zmEDJwxZEVDBkUXVuXzlRdms/view?usp=sharing

(which removes the pull down on GPIO18)

[mrniceplay]

The file solved the problem.

Thank you!

[Ruffio]

@popcornmix this issue can be closed as it has been resolved