On Mon, 2015-08-24 at 17:03 +0000, Zanoni, Paulo R wrote: > Em Qui, 2015-08-20 às 17:55 -0700, Rodrigo Vivi escreveu: > > This affects PSR on VLV, CHV, HSW and BDW. > > > > When debuging the frozen screen caused by HW tracking with low > > power state I noticed that if we keep moving the mouse non stop > > you will miss the screen updates for a while. At least > > until we stop moving the mouse for a small time and move again. > > > > The actual enabling should happen immediately after > > Display Port enabling sequence finished with links trained and > > everything enabled. However we face many issues when enabling PSR > > right after a modeset. > > > > On VLV/CHV we face blank screens on this scenario and on HSW+ > > we face a recoverable frozen screen, at least until next > > exit-activate sequence. > > > > Another workaround for the same issue here would be to increase > > re-enable idle time from 100 to 500 as we did for VLV/CHV. > > However this patch workaround this issue in a better > > way since it doesn't reduce PSR residency and also > > allow us to reduce the delay time between re-enables at least > > on VLV/CHV. > > It sounds like this could use a little more debugging. Have we tried > moving the psr enable to after intel_post_plane_update()?
I'm not sure if it is a good idea to enable psr to late directly, on some attempts to enable psr late I was having trouble with fbdev cases... but I could try... but also here we would need to be carefull to avoid multiple unecessary calls to psr_enable... > > The "move the cursor to reproduce bug" sounds very weird. yes, it is weird indeed. And hard to explain unless you are seeing it, so if you want I could upload a video somewhere to show you... > > > > > Signed-off-by: Rodrigo Vivi <rodrigo.v...@intel.com> > > --- > > drivers/gpu/drm/i915/intel_psr.c | 18 ++++++++++++++++-- > > 1 file changed, 16 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/gpu/drm/i915/intel_psr.c > > b/drivers/gpu/drm/i915/intel_psr.c > > index d02d4e2..2be4a62 100644 > > --- a/drivers/gpu/drm/i915/intel_psr.c > > +++ b/drivers/gpu/drm/i915/intel_psr.c > > @@ -427,6 +427,19 @@ void intel_psr_enable(struct intel_dp > > *intel_dp) > > vlv_psr_enable_source(intel_dp); > > } > > > > + /* > > + * FIXME: Activation should happen immediately since this > > function > > + * is just called after pipe is fully trained and enabled. > > + * However on previous platforms we face issues when first > > activation > > + * follows a modeset so quickly. > > + * - On VLV/CHV we get bank screen on first activation > > + * - On HSW/BDW we get a recoverable frozen screen > > until > > next > > + * exit-activate sequence. > > + */ > > + if (INTEL_INFO(dev)->gen < 9) > > + schedule_delayed_work(&dev_priv->psr.work, > > + msecs_to_jiffies(500)); > > + > > dev_priv->psr.enabled = intel_dp; > > unlock: > > mutex_unlock(&dev_priv->psr.lock); > > @@ -729,8 +742,9 @@ void intel_psr_flush(struct drm_device *dev, > > intel_psr_exit(dev); > > > > if (!dev_priv->psr.active && !dev_priv > > ->psr.busy_frontbuffer_bits) > > - schedule_delayed_work(&dev_priv->psr.work, > > - msecs_to_jiffies(delay_ms)); > > + if (!work_busy(&dev_priv->psr.work.work)) > > + schedule_delayed_work(&dev_priv->psr.work, > > + > > msecs_to_jiffies(delay_ms)); > > mutex_unlock(&dev_priv->psr.lock); > > } _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
