[coreboot-gerrit] Change in coreboot[master]: mb/google/brya/var/brask: Set PL and PsysPL

[Hou-hsun Lee (Code Review)]

Attention is currently required from: David Wu, Zhuohao Lee, Alan Huang.
Hou-hsun Lee has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59576 )

Change subject: mb/google/brya/var/brask: Set PL and PsysPL
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Patch Set 2:

(1 comment)

File src/mainboard/google/brya/variants/brask/ramstage.c:

https://review.coreboot.org/c/coreboot/+/59576/comment/dfe91092_67d2e39d 
PS2, Line 41: 13.52A
> This looks weird to me. The max current of the typec is 5A. […]

The Psys_pmax is just a SW setting which tells IMVP9.1 the mapping b/w system input current and the actual system power (There is no voltage info for IMVP9.1).
Imagine that there is a type-c 100W (20V/5A) connected to DUT w/ full loading, and the Psys_pmax setting is 270.4W.
Then IMVP9.1 can calculate the current system power = 270.4W * 5A / 13.52A = 100W, which is the actual system power.