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ec/google/wilco: Add EC ACPI methods for privacy screen 

Add ACPI methods to the Wilco EC for controlling a privacy screen
on the device.

BUG=b:142237145, b:142656363
TEST=none

Change-Id: Ic3c136f9d2de90eeb3c9e468e4c7430ccf6dcc42
Signed-off-by: Mathew King <mathewk@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36044
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Mathew King 2019-10-14 11:59:41 -06:00 committed by Duncan Laurie
parent 6f8f34f1bf
commit c650e130ce
3 changed files with 50 additions and 0 deletions
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3
src/ec/google/wilco/acpi/ec.asl
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@ -178,4 +178,7 @@ Device (EC0)
#ifdef EC_ENABLE_DPTF #ifdef EC_ENABLE_DPTF
#include "dptf.asl" #include "dptf.asl"
#endif #endif
#ifdef EC_ENABLE_PRIVACY
#include "privacy.asl"
#endif
} }

4
src/ec/google/wilco/acpi/ec_ram.asl
View File

@ -125,6 +125,9 @@ Name (BCCY, Package () { 0x3e, 0xffff, RD }) /* BCACHE: Cycle Count */
Name (ESGN, Package () { 0x5c, 0xff, RD }) /* Indicate EC uses signed FW */ Name (ESGN, Package () { 0x5c, 0xff, RD }) /* Indicate EC uses signed FW */
Name (EPDT, Package () { 0x5d, 0xff, RD }) /* Privacy Screen Detection */
Name (EPST, Package () { 0x5e, 0xff, RD }) /* Privacy Screen State */
/* /*
* EC RAM WRITE * EC RAM WRITE
*/ */
@ -135,6 +138,7 @@ Name (SSEL, Package () { 0x04, 0xff, WR }) /* Battery String Select */
Name (ERDY, Package () { 0x05, 0xff, WR }) /* EC Ready */ Name (ERDY, Package () { 0x05, 0xff, WR }) /* EC Ready */
Name (FWAK, Package () { 0x06, 0xff, WR }) /* EC _WAK */ Name (FWAK, Package () { 0x06, 0xff, WR }) /* EC _WAK */
Name (PS2M, Package () { 0x20, 0xff, WR }) /* EC PS/2 Mouse Emulation */ Name (PS2M, Package () { 0x20, 0xff, WR }) /* EC PS/2 Mouse Emulation */
Name (EPCT, Package () { 0x25, 0xff, WR }) /* Privacy Screen Control */
Name (DWST, Package () { 0x32, 0xff, WR }) /* DPTF: Write State */ Name (DWST, Package () { 0x32, 0xff, WR }) /* DPTF: Write State */
Name (DWTI, Package () { 0x33, 0xff, WR }) /* DPTF: Write Thermal Index */ Name (DWTI, Package () { 0x33, 0xff, WR }) /* DPTF: Write Thermal Index */
Name (DWTL, Package () { 0x35, 0xff, WR }) /* DPTF: Write Trip Low */ Name (DWTL, Package () { 0x35, 0xff, WR }) /* DPTF: Write Trip Low */

43
src/ec/google/wilco/acpi/privacy.asl Normal file
View File

@ -0,0 +1,43 @@
/*
* This file is part of the coreboot project.
*
* Copyright 2019 Google LLC
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of
* the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
/* Read Privacy Screen Present */
Method (GPVD, 0, Serialized)
{
Return (R (EPDT))
}
/* Read Privacy Screen Status */
Method (GPVX, 0, Serialized)
{
If (R (EPST) == Zero) {
Return (Zero)
}
Return (One)
}
/* Enable Privacy Screen */
Method (EPVX, 0, Serialized)
{
W (EPCT, One)
}
/* Disable Privacy Screen */
Method (DPVX, 0, Serialized)
{
W (EPCT, Zero)
}