[XS] Change in coreboot[main]: mb/google/dedede/var/awasuki: Update touchscreen power sequence

[Weimin Wu (Code Review)]

Attention is currently required from: Tongtong Pan.

Weimin Wu has posted comments on this change by Tongtong Pan. ( https://review.coreboot.org/c/coreboot/+/84196?usp=email )

Change subject: mb/google/dedede/var/awasuki: Update touchscreen power sequence
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Patch Set 3:

(2 comments)

Patchset:

PS3:
> any spec change?

No spec for stop_delay_ms, when resume the sequence is VTSP => RST => TP_EN(stop),  TP_EN(stop) is last phase.

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Before changed:
elants_i2c i2c-ELAN0001:00: PM: acpi_subsys_resume+0x0/0x60 returned 0 after 449906 usecs

the seconds_system_resume > 0.5 seconds, power_UiResume test failed.

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After changed:
elants_i2c i2c-ELAN0001:00: PM: acpi_subsys_resume+0x0/0x60 returned 0 after 161712 usecs

the seconds_system_resume < 0.5 seconds, passed power_UiResume test.

and

Passed power_SuspendStress.bareFSI 2500 cycles test, touchscreen still working functionally.

Commit Message:

https://review.coreboot.org/c/coreboot/+/84196/comment/d1c27fd3_adf5897e?usp... :
PS3, Line 9: Reduce resume time.
> Have you confirmed that the touchscreen works even after multiple iterations of suspend/resume. […]

Passed power_SuspendStress.bareFSI 2500 cycles test, touchscreen still working functionally.