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linux/Documentation/ABI/testing/sysfs-driver-amd-sfh

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HID: amd_sfh: Allow configuring whether HPD is enabled or disabled Human presence detection (HPD) sensor uses a camera to determine when user is physically in front of the machine. This might not be a desirable behavior because it can (for example) cause the machine to wake on approach. Add a new sysfs file "hpd" that will control whether this sensor is enabled. Use the value of this sysfs file to turn off HPD and prevent it from re-enabling after resume from suspend. Cc: Pratap Nirujogi <pratap.nirujogi@amd.com> Tested-by: Anson Tsao <anson.tsao@amd.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Jiri Kosina <jkosina@suse.com>
2025-02-28 10:31:51 -06:00
What: /sys/bus/pci/drivers/pcie_mp2_amd/*/hpd
Date: April 2025
Contact: mario.limonciello@amd.com
Description:
Human presence detection (HPD) enable/disable.
When HPD is enabled, the device will be able to detect the
presence of a human and will send an interrupt that can be
used to wake the system from a low power state.
When HPD is disabled, the device will not be able to detect
the presence of a human.
Access: Read/Write
Valid values: enabled/disabled
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