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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>
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