drm/i915: move opregion asle request handling to a work queue

Doing this has been long overdue anyway, but now we really need it in
preparation for per connector backlight handling.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 18 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
index b82050c96f3e..892d520175d8 100644
--- a/drivers/gpu/drm/i915/intel_opregion.c
+++ b/drivers/gpu/drm/i915/intel_opregion.c
@@ -486,9 +486,13 @@ static u32 asle_isct_state(struct drm_device *dev)
         return ASLC_ISCT_STATE_FAILED;
 }
 
-void intel_opregion_asle_intr(struct drm_device *dev)
+static void asle_work(struct work_struct *work)
 {
-        struct drm_i915_private *dev_priv = dev->dev_private;
+        struct intel_opregion *opregion =
+                container_of(work, struct intel_opregion, asle_work);
+        struct drm_i915_private *dev_priv =
+                container_of(opregion, struct drm_i915_private, opregion);
+        struct drm_device *dev = dev_priv->dev;
         struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
         u32 aslc_stat = 0;
         u32 aslc_req;
@@ -535,6 +539,14 @@ void intel_opregion_asle_intr(struct drm_device *dev)
         iowrite32(aslc_stat, &asle->aslc);
 }
 
+void intel_opregion_asle_intr(struct drm_device *dev)
+{
+        struct drm_i915_private *dev_priv = dev->dev_private;
+
+        if (dev_priv->opregion.asle)
+                schedule_work(&dev_priv->opregion.asle_work);
+}
+
 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
 #define ACPI_EV_LID            (1<<1)
 #define ACPI_EV_DOCK           (1<<2)
@@ -735,6 +747,8 @@ void intel_opregion_fini(struct drm_device *dev)
         if (opregion->asle)
                 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
 
+        cancel_work_sync(&dev_priv->opregion.asle_work);
+
         if (opregion->acpi) {
                 iowrite32(0, &opregion->acpi->drdy);
 
@@ -828,6 +842,8 @@ int intel_opregion_setup(struct drm_device *dev)
                 return -ENOTSUPP;
         }
 
+        INIT_WORK(&opregion->asle_work, asle_work);
+
         base = acpi_os_ioremap(asls, OPREGION_SIZE);
         if (!base)
                 return -ENOMEM;