[PATCH v2 04/14] drm/i915: vlv: fix switcheroo/legacy suspend/resume

Imre Deak
2014-10-23T16:25:09Z

During switcheroo/legacy suspend we don't call the suspend_late handler
but when resuming afterwards we call resume_early. This happened to work
so far, since suspend_late only disabled the PCI device. This changed in

commit 016970beb05da6285c2f3ed2bee1c676cb75972e
Author: Sagar Kamble <sagar.a.kamble@intel.com>
Date: Wed Aug 13 23:07:06 2014 +0530

drm/i915: Sharing platform specific sequence between runtime and system susp

after which we also saved/restored the VLV Gunit HW state in
suspend_late/resume_early. So now since we don't save the state during
suspend a following resume will restore a corrupted state.

Fix this by calling the suspend_late handler during both switcheroo and
legacy suspend.

CC: Sagar Kamble <sagar.a.kamble@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Sagar Kamble <sagar.a.kamble@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
drivers/gpu/drm/i915/i915_drv.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 524c3df..203bd82 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -670,11 +670,7 @@ int i915_suspend(struct drm_device *dev, pm_message_t state)
if (error)
return error;

- /* Shut down the device */
- pci_disable_device(dev->pdev);
- pci_set_power_state(dev->pdev, PCI_D3hot);
-
- return 0;
+ return i915_drm_suspend_late(dev);
}

static int i915_drm_thaw_early(struct drm_device *dev)
@@ -790,7 +786,7 @@ static int i915_resume_early(struct drm_device *dev)
return i915_drm_thaw_early(dev);
}

-int i915_resume(struct drm_device *dev)
+static int i915_drm_resume(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int ret;
@@ -816,7 +812,12 @@ static int i915_resume_legacy(struct drm_device *dev)
if (ret)
return ret;

- return i915_resume(dev);
+ return i915_drm_resume(dev);
+}
+
+int i915_resume(struct drm_device *dev)
+{
+ return i915_resume_legacy(dev);
}

/**
@@ -1004,7 +1005,7 @@ static int i915_pm_resume(struct device *dev)
struct pci_dev *pdev = to_pci_dev(dev);
struct drm_device *drm_dev = pci_get_drvdata(pdev);

- return i915_resume(drm_dev);
+ return i915_drm_resume(drm_dev);
}

static int i915_pm_freeze(struct device *dev)