[PATCH v2] AMD_SFH: Add a DMI quirk entry for Chromebooks
From: Akihiko Odaki <hidden>
Date: 2022-07-14 05:38:19
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Subsystem:
amd sensor fusion hub driver, hid core layer, the rest · Maintainers:
Basavaraj Natikar, Jiri Kosina, Benjamin Tissoires, Linus Torvalds
Google Chromebooks use Chrome OS Embedded Controller Sensor Hub instead of Sensor Hub Fusion and leaves MP2 uninitialized, which disables all functionalities, even including the registers necessary for feature detections. The behavior was observed with Lenovo ThinkPad C13 Yoga. Signed-off-by: Akihiko Odaki <redacted> Suggested-by: Mario Limonciello <mario.limonciello@amd.com> --- drivers/hid/amd-sfh-hid/amd_sfh_pcie.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
index dadc491bbf6b..b91e1c95e543 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c@@ -197,6 +197,18 @@ static const struct dmi_system_id dmi_sensor_mask_overrides[] = { }, .driver_data = (void *)(ACEL_EN | MAGNO_EN), }, + { + /* + * Google Chromebooks use Chrome OS Embedded Controller Sensor + * Hub instead of Sensor Hub Fusion and leaves MP2 + * uninitialized, which disables all functionalities, even + * including the registers necessary for feature detections. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Google"), + }, + .driver_data = (void *)0, + }, { } };
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2.36.1