From: Paulo Zanoni Date: Thu, 30 Oct 2014 17:59:31 +0000 (-0200) Subject: drm/i915: fix RPS on runtime suspend X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=fac6adb06a530ead523a60c975bae633e44335ca;p=openwrt%2Fstaging%2Fblogic.git drm/i915: fix RPS on runtime suspend With this patch, the RPS sequence for runtime suspend/resume is exactly like the sequence for S3 suspend/resume: - flush_delayed_work(&dev_priv->rps.delayed_resume_work) - intel_runtime_pm_disable_interrupts() - intel_suspend_gt_powersave() (suspended) - intel_runtime_pm_enable_interrupts() - intel_enable_gt_powersave() With this, we get rid of WARNs that are currently intermittently triggered by the system-suspend-execbuf subtest of runtime PM. Notice that these WARNs could also be triggered in other ways that involved doing lots of RPM suspend/resume cycles just after a system S3 resume. Testcase: igt/pm_rpm/system-suspend-execbuf Signed-off-by: Paulo Zanoni Reference: https://bugs.freedesktop.org/show_bug.cgi?id=82939 Reviewed-by: Imre Deak Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 0c7cf480e854..2404b2baa01e 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1395,13 +1395,9 @@ static int intel_runtime_suspend(struct device *device) i915_gem_release_all_mmaps(dev_priv); mutex_unlock(&dev->struct_mutex); - /* - * rps.work can't be rearmed here, since we get here only after making - * sure the GPU is idle and the RPS freq is set to the minimum. See - * intel_mark_idle(). - */ - cancel_work_sync(&dev_priv->rps.work); + flush_delayed_work(&dev_priv->rps.delayed_resume_work); intel_runtime_pm_disable_interrupts(dev_priv); + intel_suspend_gt_powersave(dev); ret = intel_suspend_complete(dev_priv); if (ret) { @@ -1473,7 +1469,7 @@ static int intel_runtime_resume(struct device *device) gen6_update_ring_freq(dev); intel_runtime_pm_enable_interrupts(dev_priv); - intel_reset_gt_powersave(dev); + intel_enable_gt_powersave(dev); if (ret) DRM_ERROR("Runtime resume failed, disabling it (%d)\n", ret);