// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
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/*
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*
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* (C) COPYRIGHT 2015-2021 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms
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* of such GNU license.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you can access it online at
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* http://www.gnu.org/licenses/gpl-2.0.html.
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*
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*/
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#include <mali_kbase.h>
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#include <mali_kbase_defs.h>
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#include <linux/pm_runtime.h>
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#include <linux/clk.h>
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#include <linux/clk-provider.h>
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#include <linux/regulator/consumer.h>
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#include "mali_kbase_config_platform.h"
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static void enable_gpu_power_control(struct kbase_device *kbdev)
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{
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unsigned int i;
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#if defined(CONFIG_REGULATOR)
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for (i = 0; i < kbdev->nr_regulators; i++) {
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if (WARN_ON(kbdev->regulators[i] == NULL))
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;
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else if (!regulator_is_enabled(kbdev->regulators[i]))
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WARN_ON(regulator_enable(kbdev->regulators[i]));
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}
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#endif
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for (i = 0; i < kbdev->nr_clocks; i++) {
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if (WARN_ON(kbdev->clocks[i] == NULL))
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;
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else if (!__clk_is_enabled(kbdev->clocks[i]))
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WARN_ON(clk_prepare_enable(kbdev->clocks[i]));
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}
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}
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static void disable_gpu_power_control(struct kbase_device *kbdev)
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{
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unsigned int i;
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for (i = 0; i < kbdev->nr_clocks; i++) {
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if (WARN_ON(kbdev->clocks[i] == NULL))
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;
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else if (__clk_is_enabled(kbdev->clocks[i])) {
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clk_disable_unprepare(kbdev->clocks[i]);
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WARN_ON(__clk_is_enabled(kbdev->clocks[i]));
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}
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}
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#if defined(CONFIG_REGULATOR)
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for (i = 0; i < kbdev->nr_regulators; i++) {
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if (WARN_ON(kbdev->regulators[i] == NULL))
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;
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else if (regulator_is_enabled(kbdev->regulators[i]))
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WARN_ON(regulator_disable(kbdev->regulators[i]));
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}
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#endif
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}
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static int pm_callback_power_on(struct kbase_device *kbdev)
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{
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int ret = 1; /* Assume GPU has been powered off */
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int error;
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dev_dbg(kbdev->dev, "pm_callback_power_on %p\n",
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(void *)kbdev->dev->pm_domain);
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enable_gpu_power_control(kbdev);
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error = pm_runtime_get_sync(kbdev->dev);
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if (error == 1) {
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/*
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* Let core know that the chip has not been
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* powered off, so we can save on re-initialization.
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*/
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ret = 0;
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}
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dev_dbg(kbdev->dev, "pm_runtime_get_sync returned %d\n", error);
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return ret;
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}
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static void pm_callback_power_off(struct kbase_device *kbdev)
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{
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dev_dbg(kbdev->dev, "pm_callback_power_off\n");
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pm_runtime_mark_last_busy(kbdev->dev);
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pm_runtime_put_autosuspend(kbdev->dev);
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#ifndef KBASE_PM_RUNTIME
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disable_gpu_power_control(kbdev);
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#endif
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}
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#ifdef KBASE_PM_RUNTIME
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static int kbase_device_runtime_init(struct kbase_device *kbdev)
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{
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int ret = 0;
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dev_dbg(kbdev->dev, "kbase_device_runtime_init\n");
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pm_runtime_set_autosuspend_delay(kbdev->dev, AUTO_SUSPEND_DELAY);
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pm_runtime_use_autosuspend(kbdev->dev);
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pm_runtime_set_active(kbdev->dev);
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pm_runtime_enable(kbdev->dev);
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if (!pm_runtime_enabled(kbdev->dev)) {
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dev_warn(kbdev->dev, "pm_runtime not enabled");
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ret = -ENOSYS;
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}
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return ret;
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}
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static void kbase_device_runtime_disable(struct kbase_device *kbdev)
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{
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dev_dbg(kbdev->dev, "kbase_device_runtime_disable\n");
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pm_runtime_disable(kbdev->dev);
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}
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#endif
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static int pm_callback_runtime_on(struct kbase_device *kbdev)
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{
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dev_dbg(kbdev->dev, "pm_callback_runtime_on\n");
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enable_gpu_power_control(kbdev);
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return 0;
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}
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static void pm_callback_runtime_off(struct kbase_device *kbdev)
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{
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dev_dbg(kbdev->dev, "pm_callback_runtime_off\n");
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disable_gpu_power_control(kbdev);
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}
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static void pm_callback_resume(struct kbase_device *kbdev)
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{
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int ret = pm_callback_runtime_on(kbdev);
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WARN_ON(ret);
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}
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static void pm_callback_suspend(struct kbase_device *kbdev)
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{
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pm_callback_runtime_off(kbdev);
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}
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struct kbase_pm_callback_conf pm_callbacks = {
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.power_on_callback = pm_callback_power_on,
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.power_off_callback = pm_callback_power_off,
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.power_suspend_callback = pm_callback_suspend,
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.power_resume_callback = pm_callback_resume,
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#ifdef KBASE_PM_RUNTIME
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.power_runtime_init_callback = kbase_device_runtime_init,
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.power_runtime_term_callback = kbase_device_runtime_disable,
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.power_runtime_on_callback = pm_callback_runtime_on,
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.power_runtime_off_callback = pm_callback_runtime_off,
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#else /* KBASE_PM_RUNTIME */
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.power_runtime_init_callback = NULL,
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.power_runtime_term_callback = NULL,
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.power_runtime_on_callback = NULL,
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.power_runtime_off_callback = NULL,
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#endif /* KBASE_PM_RUNTIME */
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};
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