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https://github.com/NVIDIA/open-gpu-kernel-modules.git
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82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
/*
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* SPDX-FileCopyrightText: Copyright (c) 2020 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#define __NO_VERSION__
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#include <linux/backlight.h>
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#include "os-interface.h"
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#include "nv-linux.h"
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NV_STATUS NV_API_CALL nv_get_tegra_brightness_level
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(
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nv_state_t *nv,
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NvU32 *brightness
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)
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{
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#ifdef NV_GET_BACKLIGHT_DEVICE_BY_NAME_PRESENT
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nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
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struct backlight_device *bd;
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bd = get_backlight_device_by_name(nvl->backlight.device_name);
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if (bd == NULL)
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{
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nv_printf(NV_DBG_ERRORS, "Unable to get backlight device\n");
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return NV_ERR_GENERIC;
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}
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*brightness = bd->props.brightness;
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return NV_OK;
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#else
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return NV_ERR_NOT_SUPPORTED;
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#endif
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}
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NV_STATUS NV_API_CALL nv_set_tegra_brightness_level
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(
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nv_state_t *nv,
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NvU32 brightness
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)
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{
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#ifdef NV_GET_BACKLIGHT_DEVICE_BY_NAME_PRESENT
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nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
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struct backlight_device *bd;
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bd = get_backlight_device_by_name(nvl->backlight.device_name);
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if (bd == NULL)
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{
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nv_printf(NV_DBG_ERRORS, "Unable to get backlight device\n");
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return NV_ERR_GENERIC;
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}
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bd->props.brightness = brightness;
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backlight_update_status(bd);
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return NV_OK;
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#else
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return NV_ERR_NOT_SUPPORTED;
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#endif
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}
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