On Thu, Sep 04, 2014 at 10:55:16AM +0300, Ville Syrjälä wrote: > On Wed, Sep 03, 2014 at 10:49:56PM -0400, Rodrigo Vivi wrote: > > With Software tracking we are going to PSR sooner than we should and staying > > with blank screens in many cases. > > > > Using 2 identical frames to detect idleness is safier. > > This idle frame detection still depends of FBC right? > > I believe if we want to go for full sw tracking on HSW/BDW we need to > use the debug register to force PSR entry/exit. Currently the sw tracking relies upon 1 additional full upload happening after the flush, which hopefully should magically happen if we have just 1 idle frame. If we'd completely switch to sw tracking we'd need to set up a vblank worker to disable psr after the next vblank, which would comlicate the code I think. -Daniel > > > > > Discovered and validated with refactored igt/kms_sink_psr_crc. > > > > Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> > > --- > > drivers/gpu/drm/i915/intel_dp.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c > > index f79473b..a796831 100644 > > --- a/drivers/gpu/drm/i915/intel_dp.c > > +++ b/drivers/gpu/drm/i915/intel_dp.c > > @@ -1813,7 +1813,7 @@ static void intel_edp_psr_enable_source(struct intel_dp *intel_dp) > > struct drm_device *dev = dig_port->base.base.dev; > > struct drm_i915_private *dev_priv = dev->dev_private; > > uint32_t max_sleep_time = 0x1f; > > - uint32_t idle_frames = 1; > > + uint32_t idle_frames = 2; > > uint32_t val = 0x0; > > const uint32_t link_entry_time = EDP_PSR_MIN_LINK_ENTRY_TIME_8_LINES; > > bool only_standby = false; > > -- > > 1.9.3 > > > > _______________________________________________ > > Intel-gfx mailing list > > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > > http://lists.freedesktop.org/mailman/listinfo/intel-gfx > > -- > Ville Syrjälä > Intel OTC > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
