[Intel-gfx] [PATCH i-g-t 1/5] lib/igt_chamelium: Add support for HPD toggle scheduling

[Paul Kocialkowski]

On Mon, 2017-06-26 at 17:07 -0400, Lyude Paul wrote:
> This all looks great! I'm happy to see us finally getting rid of the
> very hacky workaround I had to make async hotplugging work (to be fair,
> it was only partly broken ;). Thanks for dealing with chameleond
> upstream too, I couldn't stand how ugly the code in that thing is...

Sure, my pleasure :)

> Anyway, this whole patchset looks good. The only thing I ask is that
> you condense the patches a bit, mainly:
> 
> 1-3 can all be one patch for adding real async HPD
> 4-5 can be another single patch for enabling VGA tests

Okay then, I will prepare v2 that way (and rebased on top of current master).

Thanks for the review!

> On Mon, 2017-06-26 at 10:22 +0300, Paul Kocialkowski wrote:
> > This adds support for the newly-introduced ScheduleHpdToggle XMLRPC
> > method of the Chamelium's interface. It allows scheduling an HPD
> > toggle,
> > for which the call will return immediately.
> > 
> > This is especially useful for testing HPD during suspend/resume.
> > 
> > Signed-off-by: Paul Kocialkowski <paul.kocialkowski at linux.intel.com>
> > ---
> >  lib/igt_chamelium.c | 22 ++++++++++++++++++++++
> >  lib/igt_chamelium.h |  3 +++
> >  2 files changed, 25 insertions(+)
> > 
> > diff --git a/lib/igt_chamelium.c b/lib/igt_chamelium.c
> > index 4a2af796..523cc853 100644
> > --- a/lib/igt_chamelium.c
> > +++ b/lib/igt_chamelium.c
> > @@ -447,6 +447,28 @@ void chamelium_fire_mixed_hpd_pulses(struct
> > chamelium *chamelium,
> >  	xmlrpc_DECREF(pulse_widths);
> >  }
> >  
> > +/**
> > + * chamelium_schedule_hpd_toggle:
> > + * @chamelium: The Chamelium instance to use
> > + * @port: The port to fire the HPD pulses on
> > + * @delay_ms: Delay in milli-second before the toggle takes place
> > + * @rising_edge: Whether the toggle should be a rising edge or a
> > falling edge
> > + *
> > + * Instructs the chamelium to schedule an hpd toggle (either a
> > rising edge or
> > + * a falling edge, depending on @rising_edg) after @delay_ms have
> > passed.
> > + * This is useful for testing things such as hpd after a
> > suspend/resume cycle.
> > + */
> > +void chamelium_schedule_hpd_toggle(struct chamelium *chamelium,
> > +				   struct chamelium_port *port, int
> > delay_ms,
> > +				   bool rising_edge)
> > +{
> > +	igt_debug("Scheduling HPD toggle on %s in %d ms\n", port-
> > > name,
> > 
> > +		  delay_ms);
> > +
> > +	xmlrpc_DECREF(chamelium_rpc(chamelium, NULL,
> > "ScheduleHpdToggle",
> > +				    "(iii)", port->id, delay_ms,
> > rising_edge));
> > +}
> > +
> >  static void async_rpc_handler(const char *server_url, const char
> > *method_name,
> >  			      xmlrpc_value *param_array, void
> > *user_data,
> >  			      xmlrpc_env *fault, xmlrpc_value
> > *result)
> > diff --git a/lib/igt_chamelium.h b/lib/igt_chamelium.h
> > index 15f60246..408a4b85 100644
> > --- a/lib/igt_chamelium.h
> > +++ b/lib/igt_chamelium.h
> > @@ -61,6 +61,9 @@ void chamelium_fire_mixed_hpd_pulses(struct
> > chamelium *chamelium,
> >  void chamelium_fire_hpd_pulses(struct chamelium *chamelium,
> >  			       struct chamelium_port *port,
> >  			       int width_msec, int count);
> > +void chamelium_schedule_hpd_toggle(struct chamelium *chamelium,
> > +				   struct chamelium_port *port, int
> > delay_ms,
> > +				   bool rising_edge);
> >  void chamelium_async_hpd_pulse_start(struct chamelium *chamelium,
> >  				     struct chamelium_port *port,
> >  				     bool high, int delay_secs);
-- 
Paul Kocialkowski <paul.kocialkowski at linux.intel.com>
Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo