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HID: AMD_SFH: Add a DMI quirk entry for Chromebooks

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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 <akihiko.odaki@gmail.com>
Suggested-by: Mario Limonciello <mario.limonciello@amd.com>
Acked-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Akihiko Odaki 2022-08-16 19:21:20 +09:00 committed by Jiri Kosina
parent d9a17651f3
commit adada3f493
1 changed files with 18 additions and 0 deletions
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18
drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
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@ -288,11 +288,29 @@ int amd_sfh_irq_init(struct amd_mp2_dev *privdata)
return 0; return 0;
} }
static const struct dmi_system_id dmi_nodevs[] = {
{
/*
* 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"),
},
},
{ }
};
static int amd_mp2_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) static int amd_mp2_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{ {
struct amd_mp2_dev *privdata; struct amd_mp2_dev *privdata;
int rc; int rc;
if (dmi_first_match(dmi_nodevs))
return -ENODEV;
privdata = devm_kzalloc(&pdev->dev, sizeof(*privdata), GFP_KERNEL); privdata = devm_kzalloc(&pdev->dev, sizeof(*privdata), GFP_KERNEL);
if (!privdata) if (!privdata)
return -ENOMEM; return -ENOMEM;