Ticket #2324 (new defect)

Opened 3 years ago

Last modified 3 years ago

resume_reason can show EINT01_GSM even if GSM is off

Reported by: lindi Owned by: openmoko-kernel
Priority: normal Milestone:
Component: kernel Version: unspecified
Severity: normal Keywords: resume_reason GSM
Cc: Blocked By:
Blocking: Estimated Completion (week):
HasPatchForReview: no PatchReviewResult:
Reproducible: always

Description

Steps to reproduce:
1) receive a call while the phone is in suspend
2) stop GSM
3) suspend the phone
4) press power button
5) check /sys/class/i2c-adapter/i2c-0/0-0073/neo1973-resume.0/resume_reason for resume reason

Expected results:
5) resume reason is only EINT09_PMU

Actual results:
5) both GSM and PMU are shown as a resume reason:

  EINT00_ACCEL1
* EINT01_GSM
  EINT02_BLUETOOTH
  EINT03_DEBUGBRD
  EINT04_JACK
  EINT05_WLAN
  EINT06_AUXKEY
  EINT07_HOLDKEY
  EINT08_ACCEL2
* EINT09_PMU
  EINT10_NULL
  EINT11_NULL
  EINT12_GLAMO
  EINT13_NULL
  EINT14_NULL
  EINT15_NULL

More info:
1) linux andy-tracking a3587e4ed77974ad
2) Qi 9ef7754b8243457c
3) the problem does not appear unless the GSM has woken the system up at least once
4) I read some source code and was able to figure out:

4.1) drivers/misc/neo1973_pm_resume_reason.c reads resume reason from gstatus4 at 0x560000BC
4.2) Qi has written to this address the contents of SRCPND at 0x4A000000

I mmap()'d SRCPND via /dev/mem and it seems to contain the bytes
0c 20 00 00. (I have no idea if simple mmap() is actually able to read this correctly.)

5) If I execute steps 3 - 5 again GSM is not shown as a resume reason anymore.

Change History

comment:1 Changed 3 years ago by lindi

I was bit unclear in how I stop the GSM. I just killed gsm0710muxd and ogsmd and then checked that /sys/class/i2c-adapter/i2c-0/0-0073/neo1973-pm-gsm.0/power_on had a zero in it.

Note: See TracTickets for help on using tickets.