drm/nouveau: hook up acpi power supply change tracking
Not used at all yet, but lets hook it up now anyway.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_pm.c b/drivers/gpu/drm/nouveau/nouveau_pm.c
index 9f7b158..d938141 100644
--- a/drivers/gpu/drm/nouveau/nouveau_pm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_pm.c
@@ -27,6 +27,10 @@
#include "nouveau_drv.h"
#include "nouveau_pm.h"
+#ifdef CONFIG_ACPI
+#include <linux/acpi.h>
+#endif
+#include <linux/power_supply.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
@@ -446,6 +450,25 @@
#endif
}
+#ifdef CONFIG_ACPI
+static int
+nouveau_pm_acpi_event(struct notifier_block *nb, unsigned long val, void *data)
+{
+ struct drm_nouveau_private *dev_priv =
+ container_of(nb, struct drm_nouveau_private, engine.pm.acpi_nb);
+ struct drm_device *dev = dev_priv->dev;
+ struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
+
+ if (strcmp(entry->device_class, "ac_adapter") == 0) {
+ bool ac = power_supply_is_system_supplied();
+
+ NV_DEBUG(dev, "power supply changed: %s\n", ac ? "AC" : "DC");
+ }
+
+ return NOTIFY_OK;
+}
+#endif
+
int
nouveau_pm_init(struct drm_device *dev)
{
@@ -485,6 +508,10 @@
nouveau_sysfs_init(dev);
nouveau_hwmon_init(dev);
+#ifdef CONFIG_ACPI
+ pm->acpi_nb.notifier_call = nouveau_pm_acpi_event;
+ register_acpi_notifier(&pm->acpi_nb);
+#endif
return 0;
}
@@ -503,6 +530,9 @@
nouveau_perf_fini(dev);
nouveau_volt_fini(dev);
+#ifdef CONFIG_ACPI
+ unregister_acpi_notifier(&pm->acpi_nb);
+#endif
nouveau_hwmon_fini(dev);
nouveau_sysfs_fini(dev);
}