Change in coreboot[master]: mb/google/corsola: Revise power-on sequence of PS8640

[Rex-BC Chen (Code Review)]

Attention is currently required from: Hung-Te Lin, Paul Menzel, Yu-Ping Wu.
Hello Hung-Te Lin, build bot (Jenkins), Yu-Ping Wu,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/62893

to look at the new patch set (#5).

Change subject: mb/google/corsola: Revise power-on sequence of PS8640
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mb/google/corsola: Revise power-on sequence of PS8640

The power-on sequence of PS8640 needs to be modified because the
waveform of power-on sequence do not meet the spec of PS8640.

Datasheet name: PS8640_DS_V1.4_20200210.docx.
Chapter: 14.

BUG=b:222650141
TEST=show fw display normally in krabby.
TEST=result of waveform meets the spec.

Signed-off-by: Rex-BC Chen 
Change-Id: I7706c56dc7fc13ac84c0d52a6e534bc0988e8fd3
---
M src/mainboard/google/corsola/display.c
1 file changed, 4 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/93/62893/5