From 727538a4bbff07736ecfd704efd7e21718fca3e4 Mon Sep 17 00:00:00 2001 From: Sarah Walker Date: Wed, 22 Nov 2023 16:34:33 +0000 Subject: drm/imagination: Implement power management Add power management to the driver, using runtime pm. The power off sequence depends on firmware commands which are not implemented in this patch. Changes since v8: - Corrected license identifiers Changes since v5: - Use RUNTIME_PM_OPS() to declare PM callbacks - Add Kconfig dependency on CONFIG_PM Changes since v4: - Suspend runtime PM before unplugging device on rmmod Changes since v3: - Don't power device when calling pvr_device_gpu_fini() - Documentation for pvr_dev->lost has been improved - pvr_power_init() renamed to pvr_watchdog_init() - Use drm_dev_{enter,exit} Changes since v2: - Use runtime PM - Implement watchdog Signed-off-by: Sarah Walker Signed-off-by: Donald Robson Reviewed-by: Maxime Ripard Link: https://lore.kernel.org/r/e09af4ef1ff514e1d6d7f97c7c5032c643c56f9c.1700668843.git.donald.robson@imgtec.com Signed-off-by: Maxime Ripard --- drivers/gpu/drm/imagination/pvr_power.h | 39 +++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 drivers/gpu/drm/imagination/pvr_power.h (limited to 'drivers/gpu/drm/imagination/pvr_power.h') diff --git a/drivers/gpu/drm/imagination/pvr_power.h b/drivers/gpu/drm/imagination/pvr_power.h new file mode 100644 index 000000000000..360980f454d7 --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_power.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0-only OR MIT */ +/* Copyright (c) 2023 Imagination Technologies Ltd. */ + +#ifndef PVR_POWER_H +#define PVR_POWER_H + +#include "pvr_device.h" + +#include +#include + +int pvr_watchdog_init(struct pvr_device *pvr_dev); +void pvr_watchdog_fini(struct pvr_device *pvr_dev); + +bool pvr_power_is_idle(struct pvr_device *pvr_dev); + +int pvr_power_device_suspend(struct device *dev); +int pvr_power_device_resume(struct device *dev); +int pvr_power_device_idle(struct device *dev); + +int pvr_power_reset(struct pvr_device *pvr_dev, bool hard_reset); + +static __always_inline int +pvr_power_get(struct pvr_device *pvr_dev) +{ + struct drm_device *drm_dev = from_pvr_device(pvr_dev); + + return pm_runtime_resume_and_get(drm_dev->dev); +} + +static __always_inline int +pvr_power_put(struct pvr_device *pvr_dev) +{ + struct drm_device *drm_dev = from_pvr_device(pvr_dev); + + return pm_runtime_put(drm_dev->dev); +} + +#endif /* PVR_POWER_H */ -- cgit v1.2.3