Commit 74fca241 authored Mar 13, 2019 by Sameer Pujar Committed by Vinod Koul Mar 25, 2019

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>

parent f6ed6491

drivers/dma/tegra210-adma.c

+2 −8

Original line number	Diff line number	Diff line
		@@ -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 = {