[PATCH 1/3] drm/i915/dp: use fsleep instead of usleep_rage for LT

Murthy, Arun R arun.r.murthy at intel.com
Thu Sep 12 10:04:02 UTC 2024


> -----Original Message-----
> From: Jani Nikula <jani.nikula at linux.intel.com>
> Sent: Thursday, September 12, 2024 2:32 PM
> To: Murthy, Arun R <arun.r.murthy at intel.com>; intel-xe at lists.freedesktop.org;
> intel-gfx at lists.freedesktop.org
> Cc: Murthy, Arun R <arun.r.murthy at intel.com>; Srikanth V, NagaVenkata
> <nagavenkata.srikanth.v at intel.com>
> Subject: Re: [PATCH 1/3] drm/i915/dp: use fsleep instead of usleep_rage for LT
> 
> On Thu, 12 Sep 2024, Arun R Murthy <arun.r.murthy at intel.com> wrote:
> > Aux RD Interval value depends on the value read from the dpcd register
> > which is updated from the sink device use flseep thereby we adhere to
> > the Documentation/timers/timers-howto.rst
> 
> Please explain why instead of just referencing a file.

Sleeping for < 10us use udelay, for 10us to 20ms use usleep_range and for > 10ms use msleep.
fsleep() will call the particular api based on the above condition.

Thanks and Regards,
Arun R Murthy
--------------------


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