// 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); }