[Intel-gfx] [PATCH 3/7] drm/i915/psr: Initialize PSR mutex even when sink is not reliable

[Souza, Jose]

On Thu, 2019-04-04 at 17:22 -0700, Dhinakaran Pandiyan wrote:
> On Wed, 2019-04-03 at 16:35 -0700, José Roberto de Souza wrote:
> > Even when driver is reloaded and hits this scenario the PSR mutex
> > should be initialized, otherwise reading PSR debugfs status will
> > execute mutex_lock() over a mutex that was not initialized.
> > 
> > Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> > Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> > Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> > ---
> >  drivers/gpu/drm/i915/intel_psr.c | 1 -
> >  1 file changed, 1 deletion(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/intel_psr.c
> > b/drivers/gpu/drm/i915/intel_psr.c
> > index c80bb3003a7d..a84da931c3be 100644
> > --- a/drivers/gpu/drm/i915/intel_psr.c
> > +++ b/drivers/gpu/drm/i915/intel_psr.c
> > @@ -1227,7 +1227,6 @@ void intel_psr_init(struct drm_i915_private
> > *dev_priv)
> >  	if (val) {
> >  		DRM_DEBUG_KMS("PSR interruption error set\n");
> >  		dev_priv->psr.sink_not_reliable = true;
> Should we just sink_support = false and keep the return? IOW is there
> any use
> for sink_not_reliable?

I guess it could cause confusion as user had PSR support before the
module reload and after the load PSR debugfs will say that sink do not
support PSR.

> 
> > -		return;
> >  	}
> >  
> >  	/* Set link_standby x link_off defaults */
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