Before sharing common parts between the system and runtime s/r handlers we WARNed if the runtime s/r handlers were called on GENs that didn't support RPM. But this WARN is not correct if the same handler is called from the system s/r path, since that can happen on any platform. This also broke system s/r on old platforms.
The issue was introduced in commit 016970beb05da6285c2f3ed2bee1c676cb75972e Author: Sagar Kamble <sagar.a.kam...@intel.com> Date: Wed Aug 13 23:07:06 2014 +0530 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=82751 Signed-off-by: Imre Deak <imre.d...@intel.com> --- drivers/gpu/drm/i915/i915_drv.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 117f5c1..f646f34 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -499,7 +499,8 @@ bool i915_semaphore_is_enabled(struct drm_device *dev) } -static int intel_suspend_complete(struct drm_i915_private *dev_priv); +static int intel_suspend_complete(struct drm_i915_private *dev_priv, + bool rpm_suspend); static int intel_resume_prepare(struct drm_i915_private *dev_priv, bool rpm_resume); @@ -909,7 +910,7 @@ static int i915_pm_suspend_late(struct device *dev) if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF) return 0; - ret = intel_suspend_complete(dev_priv); + ret = intel_suspend_complete(dev_priv, false); if (ret) DRM_ERROR("Suspend complete failed: %d\n", ret); @@ -1410,7 +1411,7 @@ static int intel_runtime_suspend(struct device *device) cancel_work_sync(&dev_priv->rps.work); intel_runtime_pm_disable_interrupts(dev); - ret = intel_suspend_complete(dev_priv); + ret = intel_suspend_complete(dev_priv, true); if (ret) { DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret); intel_runtime_pm_restore_interrupts(dev); @@ -1471,10 +1472,11 @@ static int intel_runtime_resume(struct device *device) * This function implements common functionality of runtime and system * suspend sequence. */ -static int intel_suspend_complete(struct drm_i915_private *dev_priv) +static int intel_suspend_complete(struct drm_i915_private *dev_priv, + bool rpm_suspend) { struct drm_device *dev = dev_priv->dev; - int ret; + int ret = 0; if (IS_GEN6(dev)) { ret = 0; @@ -1482,7 +1484,7 @@ static int intel_suspend_complete(struct drm_i915_private *dev_priv) ret = hsw_suspend_complete(dev_priv); } else if (IS_VALLEYVIEW(dev)) { ret = vlv_suspend_complete(dev_priv); - } else { + } else if (rpm_suspend) { ret = -ENODEV; WARN_ON(1); } @@ -1499,7 +1501,7 @@ static int intel_resume_prepare(struct drm_i915_private *dev_priv, bool rpm_resume) { struct drm_device *dev = dev_priv->dev; - int ret; + int ret = 0; if (IS_GEN6(dev)) { ret = snb_resume_prepare(dev_priv, rpm_resume); @@ -1507,7 +1509,7 @@ static int intel_resume_prepare(struct drm_i915_private *dev_priv, ret = hsw_resume_prepare(dev_priv, rpm_resume); } else if (IS_VALLEYVIEW(dev)) { ret = vlv_resume_prepare(dev_priv, rpm_resume); - } else { + } else if (rpm_resume) { WARN_ON(1); ret = -ENODEV; } -- 1.8.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
