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authorTomas Winkler <tomas.winkler@intel.com>2022-04-19 12:33:11 -0700
committerDaniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>2022-04-21 11:34:20 -0700
commitad10a35461a5fc4e4d09a7259ede2508f042c6dd (patch)
tree1a2f82102d263190400e361db5f50fd922417e80 /drivers/misc/mei
parentce97126d6c1825fc7b3dd21a66a83458055bcbd7 (diff)
downloadlinux-ad10a35461a5fc4e4d09a7259ede2508f042c6dd.tar.bz2
mei: gsc: add runtime pm handlers
Implement runtime handlers for mei-gsc, to track idle state of the device properly. CC: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220419193314.526966-5-daniele.ceraolospurio@intel.com
Diffstat (limited to 'drivers/misc/mei')
-rw-r--r--drivers/misc/mei/gsc-me.c67
1 files changed, 66 insertions, 1 deletions
diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index c91bf440ea26..c8145e9b62b6 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -159,7 +159,72 @@ static int __maybe_unused mei_gsc_pm_resume(struct device *device)
return 0;
}
-static SIMPLE_DEV_PM_OPS(mei_gsc_pm_ops, mei_gsc_pm_suspend, mei_gsc_pm_resume);
+static int __maybe_unused mei_gsc_pm_runtime_idle(struct device *device)
+{
+ struct mei_device *dev = dev_get_drvdata(device);
+
+ if (!dev)
+ return -ENODEV;
+ if (mei_write_is_idle(dev))
+ pm_runtime_autosuspend(device);
+
+ return -EBUSY;
+}
+
+static int __maybe_unused mei_gsc_pm_runtime_suspend(struct device *device)
+{
+ struct mei_device *dev = dev_get_drvdata(device);
+ struct mei_me_hw *hw;
+ int ret;
+
+ if (!dev)
+ return -ENODEV;
+
+ mutex_lock(&dev->device_lock);
+
+ if (mei_write_is_idle(dev)) {
+ hw = to_me_hw(dev);
+ hw->pg_state = MEI_PG_ON;
+ ret = 0;
+ } else {
+ ret = -EAGAIN;
+ }
+
+ mutex_unlock(&dev->device_lock);
+
+ return ret;
+}
+
+static int __maybe_unused mei_gsc_pm_runtime_resume(struct device *device)
+{
+ struct mei_device *dev = dev_get_drvdata(device);
+ struct mei_me_hw *hw;
+ irqreturn_t irq_ret;
+
+ if (!dev)
+ return -ENODEV;
+
+ mutex_lock(&dev->device_lock);
+
+ hw = to_me_hw(dev);
+ hw->pg_state = MEI_PG_OFF;
+
+ mutex_unlock(&dev->device_lock);
+
+ irq_ret = mei_me_irq_thread_handler(1, dev);
+ if (irq_ret != IRQ_HANDLED)
+ dev_err(dev->dev, "thread handler fail %d\n", irq_ret);
+
+ return 0;
+}
+
+static const struct dev_pm_ops mei_gsc_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(mei_gsc_pm_suspend,
+ mei_gsc_pm_resume)
+ SET_RUNTIME_PM_OPS(mei_gsc_pm_runtime_suspend,
+ mei_gsc_pm_runtime_resume,
+ mei_gsc_pm_runtime_idle)
+};
static const struct auxiliary_device_id mei_gsc_id_table[] = {
{