topic Re: imx6q-dl cannot wakeup when using LPDDR2 in i.MX Processors

imx6q-dl cannot wakeup when using LPDDR2

clsnwei — Thu, 20 Oct 2016 04:02:26 GMT

We use LPDDR2 on imx6q-dl platform for developing ,but cannot wakeup system using power key and alarm.

When using power key wake up system , it reboot displaying watch dog as follows：

Please give me some suggestion .

Thanks !

request_suspend_state: sleep (0->3) at 46522649338 (1970-01-01 00:02:25.215163671 UTC)
active wake lock PowerManagerService.Display
PM: suspend entry 1970-01-01 00:02:25.228328004 UTC
Freezing user space processes ... (elapsed 0.031 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
PM: suspend of devices complete after 144.482 msecs
PM: suspend devices took 0.150 seconds
PM: late suspend of devices complete after 0.508 msecs
PM: noirq suspend of devices complete after 0.581 msecs
Disabling non-boot CPUs ...
CPU1: shutdown

U-Boot 2014.04 (Sep 05 2016 - 18:21:07)

CPU: Freescale i.MX6D rev1.5 at 792 MHz
CPU: Temperature 28 C, calibration data: 0x5554c569
Reset cause: WDOG
Board: MX6-Yilian
I2C: ready
DRAM: 2 GiB

Re: imx6q-dl cannot wakeup when using LPDDR2

igorpadykov — Thu, 20 Oct 2016 07:01:22 GMT

Hi clsn

please check lpddr2 patches (SCM_Linux_Patch_meta-fsl-scm.tar.gz)

for i.MX6DQ SCM board

SCM-i.MX 6Dual/6Quad Linux Patch not able to bitbake

Quick Start Board for SCM-i.MX 6DQ|NXP

Best regards
igor
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Re: imx6q-dl cannot wakeup when using LPDDR2

clsnwei — Thu, 20 Oct 2016 07:44:47 GMT

Hi Igor

Can you give me IMX6Q kernel git address supporting LPDDR2 suspend and resume？We need download all kernel source code.

Many thanks.

Re: imx6q-dl cannot wakeup when using LPDDR2

clsnwei — Thu, 20 Oct 2016 08:59:50 GMT

Hi Igor，

Our kernel version is as follows:

1 VERSION = 3
   2 PATCHLEVEL = 10
   3 SUBLEVEL = 53
   4 EXTRAVERSION =
   5 NAME = TOSSUG Baby Fish

Re: imx6q-dl cannot wakeup when using LPDDR2

igorpadykov — Thu, 20 Oct 2016 11:39:58 GMT

there is no IMX6Q reference board with LPDDR2,

so no bsp/git. You can port SCM patches to this kernel.

Best regards
igor

Re: imx6q-dl cannot wakeup when using LPDDR2

clsnwei — Fri, 21 Oct 2016 02:10:12 GMT

Hi Igor，

How can I get the SCM hardware design? I want to compare IMX6 scm with our hardware desgin.

Thanks.

Re: imx6q-dl cannot wakeup when using LPDDR2

igorpadykov — Fri, 21 Oct 2016 07:17:24 GMT

plase check

Schematics (1)
Quick Start Board Design Files (REV 0)
http://www.nxp.com/products/single-chip-modules/quick-start-board-for-scm-i.mx-6dq:QWKS-SCM-IMX6DQ?fpsp=1&tab=Design_Tools_Tab

Best regards
igor