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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2025, Advanced Micro Devices, Inc.
*/
#include <drm/amdxdna_accel.h>
#include <drm/drm_drv.h>
#include <linux/pm_runtime.h>
#include "amdxdna_pm.h"
#define AMDXDNA_AUTOSUSPEND_DELAY 5000 /* milliseconds */
int amdxdna_pm_suspend(struct device *dev)
{
struct amdxdna_dev *xdna = to_xdna_dev(dev_get_drvdata(dev));
int ret = -EOPNOTSUPP;
bool rpm;
if (xdna->dev_info->ops->suspend) {
rpm = xdna->rpm_on;
xdna->rpm_on = false;
ret = xdna->dev_info->ops->suspend(xdna);
xdna->rpm_on = rpm;
}
XDNA_DBG(xdna, "Suspend done ret %d", ret);
return ret;
}
int amdxdna_pm_resume(struct device *dev)
{
struct amdxdna_dev *xdna = to_xdna_dev(dev_get_drvdata(dev));
int ret = -EOPNOTSUPP;
bool rpm;
if (xdna->dev_info->ops->resume) {
rpm = xdna->rpm_on;
xdna->rpm_on = false;
ret = xdna->dev_info->ops->resume(xdna);
xdna->rpm_on = rpm;
}
XDNA_DBG(xdna, "Resume done ret %d", ret);
return ret;
}
int amdxdna_pm_resume_get(struct amdxdna_dev *xdna)
{
struct device *dev = xdna->ddev.dev;
int ret;
if (!xdna->rpm_on)
return 0;
ret = pm_runtime_resume_and_get(dev);
if (ret) {
XDNA_ERR(xdna, "Resume failed: %d", ret);
pm_runtime_set_suspended(dev);
}
return ret;
}
void amdxdna_pm_suspend_put(struct amdxdna_dev *xdna)
{
struct device *dev = xdna->ddev.dev;
if (!xdna->rpm_on)
return;
pm_runtime_put_autosuspend(dev);
}
void amdxdna_pm_init(struct amdxdna_dev *xdna)
{
struct device *dev = xdna->ddev.dev;
pm_runtime_set_active(dev);
pm_runtime_set_autosuspend_delay(dev, AMDXDNA_AUTOSUSPEND_DELAY);
pm_runtime_use_autosuspend(dev);
pm_runtime_allow(dev);
pm_runtime_put_autosuspend(dev);
xdna->rpm_on = true;
}
void amdxdna_pm_fini(struct amdxdna_dev *xdna)
{
struct device *dev = xdna->ddev.dev;
xdna->rpm_on = false;
pm_runtime_get_noresume(dev);
pm_runtime_forbid(dev);
}
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