[Intel-gfx] [PATCH] drm/i915/guc: Don't forward flip interrupts to GuC

[Daniel Vetter]

On Thu, Oct 01, 2015 at 11:52:36AM +0300, Jani Nikula wrote:
> On Thu, 01 Oct 2015, Daniel Vetter <daniel at ffwll.ch> wrote:
> > On Wed, Sep 30, 2015 at 10:16:14AM -0700, O'Rourke, Tom wrote:
> >> On Wed, Sep 30, 2015 at 09:57:37AM -0700, yu.dai at intel.com wrote:
> >> > From: Sagar Arun Kamble <sagar.a.kamble at intel.com>
> >> > 
> >> > Due to flip interrupts GuC stays awake always and GT does not enter
> >> > RC6. Do not route those interrupts to GuC for now. Driver won't touch
> >> > DE_GUCRMR register and leave it as what default value.
> >> > 
> >> > Signed-off-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>
> >> > Signed-off-by: Alex Dai <yu.dai at intel.com>
> >> [TOR:] This patch was previously sent.  Still looks good to me.
> >
> > Yeah when resending reviewed patches please include the r-b tag to avoid
> > wasting people's time.
> >> 
> >> Reviewed-by: Tom O'Rourke <Tom.O'Rourke at intel.com>
> >
> > Queued for -next, thanks for the patch.
> 
> Hmm, what's the impact on skl rc6 in v4.3?

guc isn't enabled yet anywhere by default. Impact is none. Yup commit
message should probably mention that ...
-Daniel
> 
> BR,
> Jani.
> 
> 
> 
> > -Daniel
> >
> >> 
> >> > ---
> >> >  drivers/gpu/drm/i915/intel_guc_loader.c | 10 ----------
> >> >  1 file changed, 10 deletions(-)
> >> > 
> >> > diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c
> >> > index ae85366..934b003 100644
> >> > --- a/drivers/gpu/drm/i915/intel_guc_loader.c
> >> > +++ b/drivers/gpu/drm/i915/intel_guc_loader.c
> >> > @@ -90,9 +90,6 @@ static void direct_interrupts_to_host(struct drm_i915_private *dev_priv)
> >> >  	for_each_ring(ring, dev_priv, i)
> >> >  		I915_WRITE(RING_MODE_GEN7(ring), irqs);
> >> >  
> >> > -	/* tell DE to send nothing to GuC */
> >> > -	I915_WRITE(DE_GUCRMR, ~0);
> >> > -
> >> >  	/* route all GT interrupts to the host */
> >> >  	I915_WRITE(GUC_BCS_RCS_IER, 0);
> >> >  	I915_WRITE(GUC_VCS2_VCS1_IER, 0);
> >> > @@ -110,13 +107,6 @@ static void direct_interrupts_to_guc(struct drm_i915_private *dev_priv)
> >> >  	for_each_ring(ring, dev_priv, i)
> >> >  		I915_WRITE(RING_MODE_GEN7(ring), irqs);
> >> >  
> >> > -	/* tell DE to send (all) flip_done to GuC */
> >> > -	irqs = DERRMR_PIPEA_PRI_FLIP_DONE | DERRMR_PIPEA_SPR_FLIP_DONE |
> >> > -	       DERRMR_PIPEB_PRI_FLIP_DONE | DERRMR_PIPEB_SPR_FLIP_DONE |
> >> > -	       DERRMR_PIPEC_PRI_FLIP_DONE | DERRMR_PIPEC_SPR_FLIP_DONE;
> >> > -	/* Unmasked bits will cause GuC response message to be sent */
> >> > -	I915_WRITE(DE_GUCRMR, ~irqs);
> >> > -
> >> >  	/* route USER_INTERRUPT to Host, all others are sent to GuC. */
> >> >  	irqs = GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
> >> >  	       GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT;
> >> > -- 
> >> > 1.9.1
> >> > 
> >> > _______________________________________________
> >> > Intel-gfx mailing list
> >> > Intel-gfx at lists.freedesktop.org
> >> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
> >> _______________________________________________
> >> Intel-gfx mailing list
> >> Intel-gfx at lists.freedesktop.org
> >> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
> >
> > -- 
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
> 
> -- 
> Jani Nikula, Intel Open Source Technology Center

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch