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dmaengine: tegra210-adma: update system sleep callbacks 

If the driver is active till late suspend, where runtime PM cannot run,
force suspend is essential in such case to put the device in low power
state. Thus pm_runtime_force_suspend and pm_runtime_force_resume are
used as system sleep callbacks during system wide PM transitions.
Late system sleep callbacks are used to ensure, for instance, that the
sound core has suspended any on-going activity, including stopping the
ADMA if active, before we attempt to suspend the ADMA.

Suggested-by: Jonathan Hunter <jonathanh@nvidia.com>
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
hifive-unleashed-5.2
Sameer Pujar 2019-03-13 17:02:37 +05:30 committed by Vinod Koul
parent f6ed6491d5
commit 74fca241e6
1 changed files with 2 additions and 8 deletions
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10
drivers/dma/tegra210-adma.c
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@ -796,17 +796,11 @@ static int tegra_adma_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int tegra_adma_pm_suspend(struct device *dev)
{
return pm_runtime_suspended(dev) == false;
}
#endif
static const struct dev_pm_ops tegra_adma_dev_pm_ops = {
SET_RUNTIME_PM_OPS(tegra_adma_runtime_suspend,
tegra_adma_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(tegra_adma_pm_suspend, NULL)
SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
};
static struct platform_driver tegra_admac_driver = {