[M] Change in coreboot[master]: common/acpi/dptc: Implement DTTS Proposal

[EricKY Cheng (Code Review)]

Attention is currently required from: Raul Rangel, Jason Nien, EricKY Cheng, Matt DeVillier, Paul Menzel, Martin Roth, Tim Van Patten, Eric Peers, Jason Glenesk, Caveh Jalali, Tim Wawrzynczak, Fred Reitberger, Karthikeyan Ramasubramanian, Boris Mittelberg, Felix Held.

Hello build bot (Jenkins), Raul Rangel, Jason Nien, Matt DeVillier, Martin Roth, Eric Peers, Tim Van Patten, Jason Glenesk, Caveh Jalali, Tim Wawrzynczak, Fred Reitberger, Karthikeyan Ramasubramanian, Boris Mittelberg, Felix Held,

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

https://review.coreboot.org/c/coreboot/+/68471

to look at the new patch set (#29).

Change subject: common/acpi/dptc: Implement DTTS Proposal
......................................................................

common/acpi/dptc: Implement DTTS Proposal

DTTS indicated Dynamic Thermal Table Switching.
The proposal would like to develop the schematic
for switching 6 thermal table by lid status,
machine body mode and temperature.
After entering the OS, the thermal table would be table A.
If the “Motion” or “Lid-status changement” is detected.
The thermal table would switch to laptop mode or lid-close
mode. Once the higher environment temperatures are detected,
the thermal table would switch to the corresponding power
throttle table(B, D or F). Based on these table switching
mechanisms, no matter how the end-user uses Chromebook,
they could enjoy more humanized thermal designs.

Release     Over         Over      Release
              Temp.       Temp.        Temp.     Temp.
--------------------------------------------------------
Desktop mode  Table A     Table B      50C       45C
Lid open      (Default)
--------------------------------------------------------
Desktop mode  Table C     Table D      55C       50C
Lid close
--------------------------------------------------------
Laptop mode   Table E     Table F      45C       40C
--------------------------------------------------------

On the proposal, the transmission rules are list below:
1. Table A is the default table after booting.
2. A, C, E can switch to each other.
3. B, D, F can switch to each other.
4. A and B, C and D, E and F can switch to each other.
5. Assume Table A is current table. When the temperature
reach 50C, than the table is switched from A to B.
6. Based on 4. The current table is B. When the temperature
is downgrade below 45C, the table is switched form B to A.
7. Based on 4 an 5, the same rule is for C and D, E and F.

BRANCH=none
BUG=b:232946420
TEST=emerge-skyrim coreboot

Signed-off-by: EricKY Cheng 
Change-Id: I866e5e497e2936984e713029b5f0b6d54cbc9622
---
M src/mainboard/google/skyrim/dsdt.asl
A src/mainboard/google/skyrim/variants/winterhold/DTTS.asl
2 files changed, 160 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/71/68471/29