drm/i915: Created common handler for platform specific suspend/resume

With this change, intel_runtime_suspend and intel_runtime_resume functions
become completely platform agnostic. Platform specific suspend/resume
changes are moved to intel_suspend_complete and intel_resume_prepare.

Cc: Imre Deak <imre.deak@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Goel, Akash <akash.goel@intel.com>
Signed-off-by: Sagar Kamble <sagar.a.kamble@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 49 insertions, 27 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 01de97776d81..b06e975dba39 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -494,6 +494,10 @@ bool i915_semaphore_is_enabled(struct drm_device *dev)
         return true;
 }
 
+
+static int intel_suspend_complete(struct drm_i915_private *dev_priv);
+static int intel_resume_prepare(struct drm_i915_private *dev_priv);
+
 static int i915_drm_freeze(struct drm_device *dev)
 {
         struct drm_i915_private *dev_priv = dev->dev_private;
@@ -959,14 +963,14 @@ static int i915_pm_poweroff(struct device *dev)
         return i915_drm_freeze(drm_dev);
 }
 
-static int hsw_runtime_suspend(struct drm_i915_private *dev_priv)
+static int hsw_suspend_complete(struct drm_i915_private *dev_priv)
 {
         hsw_enable_pc8(dev_priv);
 
         return 0;
 }
 
-static int snb_runtime_resume(struct drm_i915_private *dev_priv)
+static int snb_resume_prepare(struct drm_i915_private *dev_priv)
 {
         struct drm_device *dev = dev_priv->dev;
 
@@ -975,7 +979,7 @@ static int snb_runtime_resume(struct drm_i915_private *dev_priv)
         return 0;
 }
 
-static int hsw_runtime_resume(struct drm_i915_private *dev_priv)
+static int hsw_resume_prepare(struct drm_i915_private *dev_priv)
 {
         hsw_disable_pc8(dev_priv);
 
@@ -1271,7 +1275,7 @@ static void vlv_check_no_gt_access(struct drm_i915_private *dev_priv)
         I915_WRITE(VLV_GTLC_PW_STATUS, VLV_GTLC_ALLOWWAKEERR);
 }
 
-static int vlv_runtime_suspend(struct drm_i915_private *dev_priv)
+static int vlv_suspend_complete(struct drm_i915_private *dev_priv)
 {
         u32 mask;
         int err;
@@ -1311,7 +1315,7 @@ err1:
         return err;
 }
 
-static int vlv_runtime_resume(struct drm_i915_private *dev_priv)
+static int vlv_resume_prepare(struct drm_i915_private *dev_priv)
 {
         struct drm_device *dev = dev_priv->dev;
         int err;
@@ -1389,17 +1393,7 @@ static int intel_runtime_suspend(struct device *device)
         cancel_work_sync(&dev_priv->rps.work);
         intel_runtime_pm_disable_interrupts(dev);
 
-        if (IS_GEN6(dev)) {
-                ret = 0;
-        } else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
-                ret = hsw_runtime_suspend(dev_priv);
-        } else if (IS_VALLEYVIEW(dev)) {
-                ret = vlv_runtime_suspend(dev_priv);
-        } else {
-                ret = -ENODEV;
-                WARN_ON(1);
-        }
-
+        ret = intel_suspend_complete(dev_priv);
         if (ret) {
                 DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret);
                 intel_runtime_pm_restore_interrupts(dev);
@@ -1437,17 +1431,7 @@ static int intel_runtime_resume(struct device *device)
         intel_opregion_notify_adapter(dev, PCI_D0);
         dev_priv->pm.suspended = false;
 
-        if (IS_GEN6(dev)) {
-                ret = snb_runtime_resume(dev_priv);
-        } else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
-                ret = hsw_runtime_resume(dev_priv);
-        } else if (IS_VALLEYVIEW(dev)) {
-                ret = vlv_runtime_resume(dev_priv);
-        } else {
-                WARN_ON(1);
-                ret = -ENODEV;
-        }
-
+        ret = intel_resume_prepare(dev_priv);
         /*
          * No point of rolling back things in case of an error, as the best
          * we can do is to hope that things will still work (and disable RPM).
@@ -1466,6 +1450,44 @@ static int intel_runtime_resume(struct device *device)
         return ret;
 }
 
+static int intel_suspend_complete(struct drm_i915_private *dev_priv)
+{
+        struct drm_device *dev = dev_priv->dev;
+        int ret;
+
+        if (IS_GEN6(dev)) {
+                ret = 0;
+        } else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
+                ret = hsw_suspend_complete(dev_priv);
+        } else if (IS_VALLEYVIEW(dev)) {
+                ret = vlv_suspend_complete(dev_priv);
+        } else {
+                ret = -ENODEV;
+                WARN_ON(1);
+        }
+
+        return ret;
+}
+
+static int intel_resume_prepare(struct drm_i915_private *dev_priv)
+{
+        struct drm_device *dev = dev_priv->dev;
+        int ret;
+
+        if (IS_GEN6(dev)) {
+                ret = snb_resume_prepare(dev_priv);
+        } else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
+                ret = hsw_resume_prepare(dev_priv);
+        } else if (IS_VALLEYVIEW(dev)) {
+                ret = vlv_resume_prepare(dev_priv);
+        } else {
+                WARN_ON(1);
+                ret = -ENODEV;
+        }
+
+        return ret;
+}
+
 static const struct dev_pm_ops i915_pm_ops = {
         .suspend = i915_pm_suspend,
         .suspend_late = i915_pm_suspend_late,