From: Lyude Date: Wed, 2 Nov 2016 01:06:30 +0000 (-0400) Subject: drm/i915: Reinit polling before hpd when resuming X-Git-Tag: v4.10-rc1~154^2~37^2~9 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=e0b70061404f64f592d6d082a63c504b66d65c6e;p=linux.git drm/i915: Reinit polling before hpd when resuming Now that we don't run the connector reprobing from i915_drm_resume(), we need to make it so we don't have to wait for reprobing to finish so that we actually speed things up. In order to do this, we need to make sure that i915_drm_resume() doesn't get blocked by i915_hpd_poll_init_work() while trying to acquire the mode_config lock that drm_kms_helper_poll_enable() needs to acquire. The easiest way to do this is to just enable polling before hpd. This shouldn't break anything since at that point we have everything else we need for polling enabled. As well, this should result in a rather significant improvement in how quickly we can resume the system. Signed-off-by: Lyude Tested-by: David Weinehall Reviewed-by: David Weinehall Testcase: analyze_suspend.py -config config/suspend-callgraph.cfg -filter i915 --- diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 0e45665efd7f..b72c24ff39c3 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1600,6 +1600,8 @@ static int i915_drm_resume(struct drm_device *dev) intel_display_resume(dev); + drm_kms_helper_poll_enable(dev); + /* * ... but also need to make sure that hotplug processing * doesn't cause havoc. Like in the driver load code we don't @@ -1619,7 +1621,6 @@ static int i915_drm_resume(struct drm_device *dev) intel_opregion_notify_adapter(dev_priv, PCI_D0); intel_autoenable_gt_powersave(dev_priv); - drm_kms_helper_poll_enable(dev); enable_rpm_wakeref_asserts(dev_priv);