drm/i915/opregion: move acpi notifier to dev_priv

Get rid of the silly static variable.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180613113927.30033-1-jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
index c58e5f5..e034b41 100644 (file)
--- a/drivers/gpu/drm/i915/intel_opregion.c
+++ b/drivers/gpu/drm/i915/intel_opregion.c
@@ -608,16 +608,16 @@ void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
 #define ACPI_EV_LID            (1<<1)
 #define ACPI_EV_DOCK           (1<<2)
 
-static struct intel_opregion *system_opregion;
-
+/*
+ * The only video events relevant to opregion are 0x80. These indicate either a
+ * docking event, lid switch or display switch request. In Linux, these are
+ * handled by the dock, button and video drivers.
+ */
 static int intel_opregion_video_event(struct notifier_block *nb,
                                      unsigned long val, void *data)
 {
-       /* The only video events relevant to opregion are 0x80. These indicate
-          either a docking event, lid switch or display switch request. In
-          Linux, these are handled by the dock, button and video drivers.
-       */
-
+       struct intel_opregion *opregion = container_of(nb, struct intel_opregion,
+                                                      acpi_notifier);
        struct acpi_bus_event *event = data;
        struct opregion_acpi *acpi;
        int ret = NOTIFY_OK;
@@ -625,10 +625,7 @@ static int intel_opregion_video_event(struct notifier_block *nb,
        if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
                return NOTIFY_DONE;
 
-       if (!system_opregion)
-               return NOTIFY_DONE;
-
-       acpi = system_opregion->acpi;
+       acpi = opregion->acpi;
 
        if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
                ret = NOTIFY_BAD;
@@ -638,10 +635,6 @@ static int intel_opregion_video_event(struct notifier_block *nb,
        return ret;
 }
 
-static struct notifier_block intel_opregion_notifier = {
-       .notifier_call = intel_opregion_video_event,
-};
-
 /*
  * Initialise the DIDL field in opregion. This passes a list of devices to
  * the firmware. Values are defined by section B.4.2 of the ACPI specification
@@ -797,8 +790,8 @@ void intel_opregion_register(struct drm_i915_private *dev_priv)
                opregion->acpi->csts = 0;
                opregion->acpi->drdy = 1;
 
-               system_opregion = opregion;
-               register_acpi_notifier(&intel_opregion_notifier);
+               opregion->acpi_notifier.notifier_call = intel_opregion_video_event;
+               register_acpi_notifier(&opregion->acpi_notifier);
        }
 
        if (opregion->asle) {
@@ -822,8 +815,8 @@ void intel_opregion_unregister(struct drm_i915_private *dev_priv)
        if (opregion->acpi) {
                opregion->acpi->drdy = 0;
 
-               system_opregion = NULL;
-               unregister_acpi_notifier(&intel_opregion_notifier);
+               unregister_acpi_notifier(&opregion->acpi_notifier);
+               opregion->acpi_notifier.notifier_call = NULL;
        }
 
        /* just clear all opregion memory pointers now */

diff --git a/drivers/gpu/drm/i915/intel_opregion.h b/drivers/gpu/drm/i915/intel_opregion.h
index e0e437b..e8498a8 100644 (file)
--- a/drivers/gpu/drm/i915/intel_opregion.h
+++ b/drivers/gpu/drm/i915/intel_opregion.h
@@ -49,6 +49,7 @@ struct intel_opregion {
        u32 vbt_size;
        u32 *lid_state;
        struct work_struct asle_work;
+       struct notifier_block acpi_notifier;
 };
 
 #define OPREGION_SIZE            (8 * 1024)