Re: [PATCH i-g-t] tests/kms_frontbuffer_tracking: Skip tests when PSR cannot be enabled

[Paulo Zanoni <paulo.r.zanoni@intel.com>]

Em Qui, 2017-10-26 às 12:32 -0700, Rodrigo Vivi escreveu:
> On Thu, Oct 26, 2017 at 01:29:57PM +0000, Paulo Zanoni wrote:
> > Em Qua, 2017-10-25 às 17:37 -0700, Dhinakaran Pandiyan escreveu:
> > > The frontbuffer_tracking PSR tests fail if PSR cannot be
> > > activated
> > > when
> > > there is sink support. But, there are several other requirements
> > > related to
> > > mode timings that have to be satisfied before PSR can be enabled.
> > > No
> > > reason
> > > to fail these tests when PSR cannot be enabled.
> > > 
> > > Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> > > Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
> > > Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com
> > > >
> > > ---
> > >  tests/kms_frontbuffer_tracking.c | 8 ++++----
> > >  1 file changed, 4 insertions(+), 4 deletions(-)
> > > 
> > > diff --git a/tests/kms_frontbuffer_tracking.c
> > > b/tests/kms_frontbuffer_tracking.c
> > > index a068c8af..13c948de 100644
> > > --- a/tests/kms_frontbuffer_tracking.c
> > > +++ b/tests/kms_frontbuffer_tracking.c
> > > @@ -1548,12 +1548,12 @@ static void teardown_fbc(void)
> > >  {
> > >  }
> > >  
> > > -static bool psr_sink_has_support(void)
> > > +static bool psr_has_support(void)
> > >  {
> > >  	char buf[256];
> > >  
> > >  	debugfs_read("i915_edp_psr_status", buf);
> > > -	return strstr(buf, "Sink_Support: yes\n");
> > > +	return strstr(buf, "Enabled: yes\n");
> > 
> > What if PSR can be enabled but is just not enabled due to a bug?
> 
> then psr basic should be the one failing...

But if we apply this patch we'll skip it instead of fail.

> 
> > 
> > I suppose we could print on debugfs whether source+sink support
> > equals
> > yes.
> 
> or maybe here instead of sink: yes or enable: yes
> we could check
> sink: yes && source: yes
> 
> if sink yes and source yes and psr is still disabled when we
> expect that enabled than we have the bug paulo mentioned.
> 
> > 
> > >  }
> > >  
> > >  static void setup_psr(void)
> > > @@ -1564,8 +1564,8 @@ static void setup_psr(void)
> > >  		return;
> > >  	}
> > >  
> > > -	if (!psr_sink_has_support()) {
> > > -		igt_info("Can't test PSR: not supported by
> > > sink.\n");
> > > +	if (!psr_has_support()) {
> > > +		igt_info("Can't test PSR: not supported.\n");
> > >  		return;
> > >  	}
> > >  	psr.can_test = true;
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