• Srinivas Pandruvada's avatar
    hid-sensor: Fix suspend/resume delay · 88cc7b4e
    Srinivas Pandruvada authored
    By default all the sensors are runtime suspended state (lowest power
    state). During Linux suspend process, all the run time suspended
    devices are resumed and then suspended. This caused all sensors to
    power up and introduced delay in suspend time, when we introduced
    runtime PM for HID sensors. The opposite process happens during resume
    process.
    
    To fix this, we do powerup process of the sensors only when the request
    is issued from user (raw or tiggerred). In this way when runtime,
    resume calls for powerup it will simply return as this will not match
    user requested state.
    
    Note this is a regression fix as the increase in suspend / resume
    times can be substantial (report of 8 seconds on Len's laptop!)
    Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
    Tested-by: default avatarLen Brown <len.brown@intel.com>
    Cc: <Stable@vger.kernel.org>
    Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
    88cc7b4e
hid-sensor-hub.h 8.67 KB