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. This is also important to make the sysfs toggle working properly. Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> --- 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 da28f0c..6e7e8e6 100644 --- a/drivers/gpu/drm/i915/intel_psr.c +++ b/drivers/gpu/drm/i915/intel_psr.c @@ -448,6 +448,19 @@ int intel_psr_enable(struct intel_crtc *intel_crtc) 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 every platform 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(intel_dp->panel_power_cycle_delay * 5)); + dev_priv->psr.enabled = intel_dp; unlock: mutex_unlock(&dev_priv->psr.lock); @@ -744,8 +757,9 @@ 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); } -- 2.4.3 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
