Re: [PATCH v4 1/2] dma-fence: allow signaling drivers to set fence timestamp

Hi Veera, On Wed, 20 Jan 2021 at 02:00, John Stultz wrote: > > On Fri, Jan 15, 2021 at 4:31 PM Veera Sundaram Sankaran > wrote: > > > > Some drivers have hardware capability to get the precise HW timestamp > > of certain events based on which the fences are triggered. The delta > > between the e

Re: [PATCH v4 1/2] dma-fence: allow signaling drivers to set fence timestamp

On Fri, Jan 15, 2021 at 4:31 PM Veera Sundaram Sankaran wrote: > > Some drivers have hardware capability to get the precise HW timestamp > of certain events based on which the fences are triggered. The delta > between the event HW timestamp & current HW reference timestamp can > be used to calcula

[PATCH v4 1/2] dma-fence: allow signaling drivers to set fence timestamp

Some drivers have hardware capability to get the precise HW timestamp of certain events based on which the fences are triggered. The delta between the event HW timestamp & current HW reference timestamp can be used to calculate the timestamp in kernel's CLOCK_MONOTONIC time domain. This allows it t