132fd3941e
Add display cooling device interface, which will enable to register a cooling device and send a blocking notifier call when there is a new mitigation request. Change-Id: I59e4a7190f637fba7f63e47ff495242718cc3c9b Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>
90 行
2.4 KiB
C
90 行
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2020, The Linux Foundation. All rights reserved.
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*/
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#include <linux/err.h>
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#include <linux/slab.h>
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#include "msm_cooling_device.h"
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static int sde_cdev_get_max_brightness(struct thermal_cooling_device *cdev,
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unsigned long *state)
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{
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struct sde_cdev *disp_cdev = (struct sde_cdev *)cdev->devdata;
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*state = disp_cdev->bd->props.max_brightness;
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return 0;
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}
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static int sde_cdev_get_cur_brightness(struct thermal_cooling_device *cdev,
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unsigned long *state)
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{
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struct sde_cdev *disp_cdev = (struct sde_cdev *)cdev->devdata;
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*state = disp_cdev->bd->props.max_brightness - disp_cdev->thermal_state;
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return 0;
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}
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static int sde_cdev_set_cur_brightness(struct thermal_cooling_device *cdev,
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unsigned long state)
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{
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struct sde_cdev *disp_cdev = (struct sde_cdev *)cdev->devdata;
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unsigned long brightness_lvl = 0;
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if (state > disp_cdev->bd->props.max_brightness)
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return -EINVAL;
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brightness_lvl = disp_cdev->bd->props.max_brightness - state;
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if (brightness_lvl == disp_cdev->thermal_state)
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return 0;
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disp_cdev->thermal_state = brightness_lvl;
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blocking_notifier_call_chain(&disp_cdev->notifier_head,
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brightness_lvl, (void *)disp_cdev->bd);
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return 0;
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}
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static struct thermal_cooling_device_ops sde_cdev_ops = {
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.get_max_state = sde_cdev_get_max_brightness,
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.get_cur_state = sde_cdev_get_cur_brightness,
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.set_cur_state = sde_cdev_set_cur_brightness,
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};
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struct sde_cdev *backlight_cdev_register(struct device *dev,
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struct backlight_device *bd,
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struct notifier_block *n)
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{
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struct sde_cdev *disp_cdev = NULL;
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if (!dev || !bd || !n)
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return ERR_PTR(-EINVAL);
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if (!of_find_property(dev->of_node, "#cooling-cells", NULL))
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return ERR_PTR(-ENODEV);
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disp_cdev = devm_kzalloc(dev, sizeof(*disp_cdev), GFP_KERNEL);
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if (!disp_cdev)
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return ERR_PTR(-ENOMEM);
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disp_cdev->thermal_state = 0;
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disp_cdev->bd = bd;
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disp_cdev->cdev = thermal_of_cooling_device_register(dev->of_node,
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(char *)dev_name(&bd->dev), disp_cdev,
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&sde_cdev_ops);
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if (IS_ERR_OR_NULL(disp_cdev->cdev)) {
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pr_err("cooling device register failed\n");
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return (void *)disp_cdev->cdev;
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}
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BLOCKING_INIT_NOTIFIER_HEAD(&disp_cdev->notifier_head);
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blocking_notifier_chain_register(&disp_cdev->notifier_head, n);
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return disp_cdev;
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}
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void backlight_cdev_unregister(struct sde_cdev *cdev)
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{
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if (!cdev)
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return;
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thermal_cooling_device_unregister(cdev->cdev);
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}
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