On Fri, 2018-10-05 at 13:00 -0700, Souza, Jose wrote: > On Thu, 2018-10-04 at 20:01 -0700, Dhinakaran Pandiyan wrote: > > The hardware can start selective update following capture of a full > > frame > > in the remote frame buffer, there is no need to wait any longer. > > Set > > "Frames Before SU Entry" bitfield to the default value of 1. > > > > Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandi...@intel.com> > > --- > > drivers/gpu/drm/i915/intel_psr.c | 3 +-- > > 1 file changed, 1 insertion(+), 2 deletions(-) > > > > diff --git a/drivers/gpu/drm/i915/intel_psr.c > > b/drivers/gpu/drm/i915/intel_psr.c > > index 83528647b40b..105b7ea2cd98 100644 > > --- a/drivers/gpu/drm/i915/intel_psr.c > > +++ b/drivers/gpu/drm/i915/intel_psr.c > > @@ -424,6 +424,7 @@ static void hsw_activate_psr2(struct intel_dp > > *intel_dp) > > > > idle_frames = max(idle_frames, dev_priv->psr.sink_sync_latency > > + 1); > > val = idle_frames << EDP_PSR2_IDLE_FRAME_SHIFT; > > + val |= EDP_PSR2_FRAME_BEFORE_SU(1); > > I guess 0 would the right value, setting to 1 feels like it would > wait > 1 frame after a flip/front buffer modfication to do a SU. I will run > some tests changing EDP_PSR2_IDLE_FRAME_SHIFT and > EDP_PSR2_FRAME_BEFORE_SU. If that was the case, we should have seen noticeable lags with the current value of 6? And I can't tell why there would be a configurable delay to update a new frame.
I believe this is just like PSR1 idle frames, the field allows the driver to configure the number of idle frames before entering the SU mode. -DK > > > > > /* FIXME: selective update is probably totally broken because > > it doesn't > > * mesh at all with our frontbuffer tracking. And the hw alone > > isn't > > @@ -432,8 +433,6 @@ static void hsw_activate_psr2(struct intel_dp > > *intel_dp) > > if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) > > val |= EDP_Y_COORDINATE_ENABLE; > > > > - val |= EDP_PSR2_FRAME_BEFORE_SU(dev_priv- > > >psr.sink_sync_latency > > + 1); > > - > > if (dev_priv->vbt.psr.tp2_tp3_wakeup_time_us >= 0 && > > dev_priv->vbt.psr.tp2_tp3_wakeup_time_us <= 50) > > val |= EDP_PSR2_TP2_TIME_50us; _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
