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>
diff --git a/src/ec/google/wilco/acpi/ec.asl b/src/ec/google/wilco/acpi/ec.asl
index 532f421..8fcd0dd 100644
--- a/src/ec/google/wilco/acpi/ec.asl
+++ b/src/ec/google/wilco/acpi/ec.asl
@@ -178,4 +178,7 @@
#ifdef EC_ENABLE_DPTF
#include "dptf.asl"
#endif
+#ifdef EC_ENABLE_PRIVACY
+ #include "privacy.asl"
+#endif
}
diff --git a/src/ec/google/wilco/acpi/ec_ram.asl b/src/ec/google/wilco/acpi/ec_ram.asl
index 47e9072..af8fc0e 100644
--- a/src/ec/google/wilco/acpi/ec_ram.asl
+++ b/src/ec/google/wilco/acpi/ec_ram.asl
@@ -125,6 +125,9 @@
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
*/
@@ -135,6 +138,7 @@
Name (ERDY, Package () { 0x05, 0xff, WR }) /* EC Ready */
Name (FWAK, Package () { 0x06, 0xff, WR }) /* EC _WAK */
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 (DWTI, Package () { 0x33, 0xff, WR }) /* DPTF: Write Thermal Index */
Name (DWTL, Package () { 0x35, 0xff, WR }) /* DPTF: Write Trip Low */
diff --git a/src/ec/google/wilco/acpi/privacy.asl b/src/ec/google/wilco/acpi/privacy.asl
new file mode 100644
index 0000000..5c620b0
--- /dev/null
+++ b/src/ec/google/wilco/acpi/privacy.asl
@@ -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)
+}