Hi, On Thu, Nov 17, 2022 at 1:14 PM Doug Anderson <dianders@xxxxxxxxxxxx> wrote: > > Hi, > > On Thu, Nov 17, 2022 at 12:39 PM Drew Davenport <ddavenport@xxxxxxxxxxxx> wrote: > > > > ktime_get is based on CLOCK_MONOTONIC which stops on suspend. On > > suspend, the time that the panel was powerd off is recorded with > > ktime_get, and on resume this time is compared to the current ktime_get > > time to determine if the driver should wait for the panel to power down > > completely before re-enabling it. > > > > Because we're using ktime_get, this delay doesn't account for the time > > that the device is suspended, during which the power down delay may have > > already elapsed. > > > > Change to use ktime_get_boottime throughout, which uses CLOCK_BOOTTIME > > which does not stop when suspended. This ensures that the resume path > > will not be delayed if the power off delay has already been met while > > the device is suspended. > > > > Signed-off-by: Drew Davenport <ddavenport@xxxxxxxxxxxx> > > > > --- > > > > drivers/gpu/drm/panel/panel-edp.c | 8 ++++---- > > 1 file changed, 4 insertions(+), 4 deletions(-) > > Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx> Pushed to drm-misc-next: fa8e91b12697 drm/panel-edp: Use ktime_get_boottime for delays
