Power Management errors

Glenn Wainwright

Other Parts Discussed in Thread: OMAP3530

I'm working on the OMAP3530 using linux 02.01.03.11, and I've just started trying to get suspend functionality up and running. However, even with just the omap3_evm_defconfig on the EVM hardware, I'm having problems shutting down the following powerdomains using "echo mem > /sys/power/state":

Powerdomain (mpu_pwrdm) didn't enter target state 1

Powerdomain (neon_pwrdm) didn't enter target state 1

Powerdomain (core_pwrdm) didn't enter target state 1

Powerdomain (dss_pwrdm) didn't enter target state 1

Powerdomain (per_pwrdm) didn't enter target state 1

Powerdomain (usbhost_pwrdm) didn't enter target state 1

Normally I would guess that there's some device driver that's not being obedient, but I'm even running into the issue on the EVM. Is this a known issue with the default config, or could I be missing something else?

Thank you,

Glenn Wainwright

over 15 years ago

0 kshin over 15 years ago

TI__Genius 16690 points

Hello Glenn,

I think power management features are not enabled in the default configuration omap3_evm_defconfig. Please enable it by following the procedure 12.4 Configuration on page 216 of OMAP35x EVM Linux PSP User Guide and build an image with power management features.

0 Glenn Wainwright over 15 years ago in reply to kshin

Expert 1605 points

Thank you for the response - I have double-checked, and Power Management, cpuidle, and power management debug msgs have all been enabled.

Glenn Wainwright

0 Glenn Wainwright over 15 years ago in reply to Glenn Wainwright

Expert 1605 points

Also, the USB power management support (oddly not listed in the PSP guide) is enabled as well.

0 Ranjith Lohithakshan over 15 years ago in reply to Glenn Wainwright

TI__Intellectual 1430 points

Hi,

Looking at the logs I can see that none of the powerdomains are entering into idle state. This indicates that there are still clocks active in the system. Could you please check that the option CONFIG_OMAP_RESET_CLOCKS is enabled. and if not please enable that and try?

Thanks,

Ranjith

0 Glenn Wainwright over 15 years ago in reply to Ranjith Lohithakshan

Expert 1605 points

Thank you for the suggestion. I have verified that CONFIG_OMAP_RESET_CLOCKS is enabled. Is there perhaps an optimum setting for the various options under /sys/power (eg clocks_off_while_idle, enable_off_mode, etc)?

Glenn Wainwright

0 Ranjith Lohithakshan over 14 years ago in reply to Glenn Wainwright

TI__Intellectual 1430 points

Glenn,

I have reviewed the PSP 02.01.03.11 release and few of the known issues mentioned there are related to DSS and USB power management support. There are known problems with suspend/resume of these modules. These issues are fixed in the PSP3.x releases. Would it be possible for you to migrate to PSP 03.00.01.06 release? I would recommend that as lot of driver power management issues are fixed in this release. Also when upgrading, please do upgrade U-Boot and X-Loader as well.

Thanks,

Ranjith

0 Glenn Wainwright over 14 years ago in reply to Ranjith Lohithakshan

Expert 1605 points

That's unfortunate, but I'm glad you were able to find that information. Since we'll need to migrate to the 4.00.x release when we move to the 3730 anyway, it makes sense to begin porting over to that version if it will allow us to begin testing the power management functionality now. I will begin working on that soon and let you know if that solves the problem.

Thank you,
Glenn Wainwright

0 Glenn Wainwright over 14 years ago in reply to Glenn Wainwright

Expert 1605 points

Looks like moving to 4.00 is going to fix the problem. "Successfully put all powerdomains to target state" Nice.

Glenn

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