diff options
Diffstat (limited to 'drivers/gpu/arm/mali400/r4p0_rel0/linux/mali_osk_pm.c')
-rw-r--r-- | drivers/gpu/arm/mali400/r4p0_rel0/linux/mali_osk_pm.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/drivers/gpu/arm/mali400/r4p0_rel0/linux/mali_osk_pm.c b/drivers/gpu/arm/mali400/r4p0_rel0/linux/mali_osk_pm.c new file mode 100644 index 00000000000..59130a19330 --- /dev/null +++ b/drivers/gpu/arm/mali400/r4p0_rel0/linux/mali_osk_pm.c @@ -0,0 +1,109 @@ +/** + * Copyright (C) 2010-2012 ARM Limited. All rights reserved. + * + * This program is free software and is provided to you under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence. + * + * A copy of the licence is included with the program, and can also be obtained from Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +/** + * @file mali_osk_pm.c + * Implementation of the callback functions from common power management + */ + +#include <linux/sched.h> + +#ifdef CONFIG_PM_RUNTIME +#include <linux/pm_runtime.h> +#endif /* CONFIG_PM_RUNTIME */ +#include <linux/platform_device.h> +#include <linux/version.h> +#include "mali_osk.h" +#include "mali_kernel_common.h" +#include "mali_kernel_linux.h" + +static _mali_osk_atomic_t mali_pm_ref_count; + +void _mali_osk_pm_dev_enable(void) +{ + _mali_osk_atomic_init(&mali_pm_ref_count, 0); +} + +void _mali_osk_pm_dev_disable(void) +{ + _mali_osk_atomic_term(&mali_pm_ref_count); +} + +/* Can NOT run in atomic context */ +_mali_osk_errcode_t _mali_osk_pm_dev_ref_add(void) +{ +#ifdef CONFIG_PM_RUNTIME + int err; + MALI_DEBUG_ASSERT_POINTER(mali_platform_device); + err = pm_runtime_get_sync(&(mali_platform_device->dev)); +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) + pm_runtime_mark_last_busy(&(mali_platform_device->dev)); +#endif + if (0 > err) { + MALI_PRINT_ERROR(("Mali OSK PM: pm_runtime_get_sync() returned error code %d\n", err)); + return _MALI_OSK_ERR_FAULT; + } + _mali_osk_atomic_inc(&mali_pm_ref_count); + MALI_DEBUG_PRINT(4, ("Mali OSK PM: Power ref taken (%u)\n", _mali_osk_atomic_read(&mali_pm_ref_count))); +#endif + return _MALI_OSK_ERR_OK; +} + +/* Can run in atomic context */ +void _mali_osk_pm_dev_ref_dec(void) +{ +#ifdef CONFIG_PM_RUNTIME + MALI_DEBUG_ASSERT_POINTER(mali_platform_device); + _mali_osk_atomic_dec(&mali_pm_ref_count); +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) + pm_runtime_mark_last_busy(&(mali_platform_device->dev)); + pm_runtime_put_autosuspend(&(mali_platform_device->dev)); +#else + pm_runtime_put(&(mali_platform_device->dev)); +#endif + MALI_DEBUG_PRINT(4, ("Mali OSK PM: Power ref released (%u)\n", _mali_osk_atomic_read(&mali_pm_ref_count))); +#endif +} + +/* Can run in atomic context */ +mali_bool _mali_osk_pm_dev_ref_add_no_power_on(void) +{ +#ifdef CONFIG_PM_RUNTIME + u32 ref; + MALI_DEBUG_ASSERT_POINTER(mali_platform_device); + pm_runtime_get_noresume(&(mali_platform_device->dev)); + ref = _mali_osk_atomic_read(&mali_pm_ref_count); + MALI_DEBUG_PRINT(4, ("Mali OSK PM: No-power ref taken (%u)\n", _mali_osk_atomic_read(&mali_pm_ref_count))); + return ref > 0 ? MALI_TRUE : MALI_FALSE; +#else + return MALI_TRUE; +#endif +} + +/* Can run in atomic context */ +void _mali_osk_pm_dev_ref_dec_no_power_on(void) +{ +#ifdef CONFIG_PM_RUNTIME + MALI_DEBUG_ASSERT_POINTER(mali_platform_device); +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) + pm_runtime_put_autosuspend(&(mali_platform_device->dev)); +#else + pm_runtime_put(&(mali_platform_device->dev)); +#endif + MALI_DEBUG_PRINT(4, ("Mali OSK PM: No-power ref released (%u)\n", _mali_osk_atomic_read(&mali_pm_ref_count))); +#endif +} + +void _mali_osk_pm_dev_barrier(void) +{ +#ifdef CONFIG_PM_RUNTIME + pm_runtime_barrier(&(mali_platform_device->dev)); +#endif +} |