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dmaengine: tegra210-adma: update system sleep callbacks

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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>
This commit is contained in:
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; 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 = { static const struct dev_pm_ops tegra_adma_dev_pm_ops = {
SET_RUNTIME_PM_OPS(tegra_adma_runtime_suspend, SET_RUNTIME_PM_OPS(tegra_adma_runtime_suspend,
tegra_adma_runtime_resume, NULL) 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 = { static struct platform_driver tegra_admac_driver = {