[PATCH] ALSA: firewire-lib: extend tracepoints event including CYCLE_TIME of 1394 OHCI

Takashi Iwai tiwai at suse.de
Tue Jan 10 09:36:49 CET 2023


On Mon, 09 Jan 2023 22:32:31 +0100,
Takashi Sakamoto wrote:
> 
> A commit baa914cd81f5 ("firewire: add kernel API to access CYCLE_TIME
> register") allow unit drivers to read CYCLE_TIME of 1394 OHCI controller.
> The value expresses monotonic time with 42.195 Mhz resolution and wrapping
> around every 128 seconds. The controller uses the time to govern
> isochronous cycle.
> 
> This commit extends tracepoints event including the value so that event
> parser can compute gap between current isochronous cycle and the latest
> isochronous cycle in which packet is processed (in IR context) or scheduled
> (in IT context). It loses backward compatibility to former format of the
> tracepoints event.
> 
> Signed-off-by: Takashi Sakamoto <o-takashi at sakamocchi.jp>

Thanks, applied now.


Takashi


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