Re: [PATCH] HID: hid-multitouch: forward MSC_TIMESTAMP
From: Jiri Kosina
Date: Thu Oct 05 2017 - 05:19:06 EST
On Tue, 22 Aug 2017, Nicolas Boichat wrote:
> Computes and forwards the device timestamp according to the
> Many devices use a 16-bit timestamp field, with a resolution
> of 100us, therefore rolling around very frequently (every
> 6.5 seconds). To make sure there is no ambiguity, the
> timestamp reported to the input stack reset to 0 whenever
> the time between 2 received events is greater than
> MAX_TIMESTAMP_INTERVAL (1 second).
> Signed-off-by: Nicolas Boichat <drinkcat@xxxxxxxxxxxx>
> Inspired from Benjamin Tissoires's patch here:
> https://patchwork.kernel.org/patch/1742181/, and changing the
> logic to resynchronize the timestamps to use received time
> instead of a potentially more fragile difference between
> the 2 deltas.
Applied to for-4.15/multitouch.