mirror of
https://github.com/NVIDIA/open-gpu-kernel-modules.git
synced 2026-01-27 11:39:46 +00:00
131 lines
3.9 KiB
C
131 lines
3.9 KiB
C
/*
|
|
* SPDX-FileCopyrightText: Copyright (c) 2020-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
|
|
* SPDX-License-Identifier: MIT
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
* DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#define __NO_VERSION__
|
|
|
|
#include "os-interface.h"
|
|
#include "nv-linux.h"
|
|
|
|
/*!
|
|
* @brief Unpowergate the display.
|
|
*
|
|
* Increment the device's usage counter, run pm_request_resume(dev)
|
|
* and return its result.
|
|
*
|
|
* For more details on runtime pm functions, please check the below
|
|
* files in the Linux kernel:
|
|
*
|
|
* include/linux/pm_runtime.h
|
|
* include/linux/pm.h
|
|
* or
|
|
* https://www.kernel.org/doc/Documentation/power/runtime_pm.txt
|
|
*
|
|
* pm_request_resume() submits a request to execute the subsystem-level
|
|
* resume callback for the device (the request is represented by a work
|
|
* item in pm_wq); returns 0 on success, 1 if the device's runtime PM
|
|
* status was already 'active', or error code if the request hasn't
|
|
* been queued up.
|
|
*
|
|
* @param[in] nv Per gpu linux state
|
|
*
|
|
* @returns NV_STATUS
|
|
*/
|
|
NV_STATUS NV_API_CALL nv_soc_pm_unpowergate(
|
|
nv_state_t *nv)
|
|
{
|
|
#if NV_SUPPORTS_PLATFORM_DISPLAY_DEVICE
|
|
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
|
|
NvS32 ret = -EBUSY;
|
|
|
|
ret = pm_runtime_get(nvl->dev);
|
|
|
|
if (ret == 1)
|
|
{
|
|
nv_printf(NV_DBG_INFO, "NVRM: device was already unpowergated\n");
|
|
}
|
|
else if (ret == -EINPROGRESS)
|
|
{
|
|
/*
|
|
* pm_runtime_get() internally calls __pm_runtime_resume(...RPM_ASYNC)
|
|
* which internally calls rpm_resume() and this function will throw
|
|
* "-EINPROGRESS" if it is being called when device state is
|
|
* RPM_RESUMING and RPM_ASYNC or RPM_NOWAIT is set.
|
|
*/
|
|
nv_printf(NV_DBG_INFO, "NVRM: device is already unpowergating\n");
|
|
}
|
|
else if (ret < 0)
|
|
{
|
|
nv_printf(NV_DBG_ERRORS, "NVRM: unpowergate unsuccessful. ret: %d\n", ret);
|
|
return NV_ERR_GENERIC;
|
|
}
|
|
|
|
return NV_OK;
|
|
#else
|
|
return NV_ERR_NOT_SUPPORTED;
|
|
#endif
|
|
}
|
|
|
|
/*!
|
|
* @brief Powergate the display.
|
|
*
|
|
* Decrement the device's usage counter; if the result is 0 then run
|
|
* pm_request_idle(dev) and return its result.
|
|
*
|
|
* For more details on runtime pm functions, please check the below
|
|
* files in the Linux kernel:
|
|
*
|
|
* include/linux/pm_runtime.h
|
|
* include/linux/pm.h
|
|
* or
|
|
* https://www.kernel.org/doc/Documentation/power/runtime_pm.txt
|
|
*
|
|
* @param[in] nv Per gpu linux state
|
|
*
|
|
* @returns NV_STATUS
|
|
*/
|
|
NV_STATUS NV_API_CALL nv_soc_pm_powergate(
|
|
nv_state_t *nv)
|
|
{
|
|
#if NV_SUPPORTS_PLATFORM_DISPLAY_DEVICE
|
|
NV_STATUS status = NV_ERR_GENERIC;
|
|
nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
|
|
NvS32 ret = -EBUSY;
|
|
|
|
ret = pm_runtime_put(nvl->dev);
|
|
|
|
if (ret == 0)
|
|
{
|
|
status = NV_OK;
|
|
}
|
|
else
|
|
{
|
|
nv_printf(NV_DBG_ERRORS, "NVRM: powergate unsuccessful. ret: %d\n", ret);
|
|
}
|
|
|
|
return status;
|
|
#else
|
|
return NV_ERR_NOT_SUPPORTED;
|
|
#endif
|
|
}
|
|
|