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authorGeert Uytterhoeven <geert+renesas@glider.be>2018-01-17 10:38:28 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-01-17 12:46:18 +0100
commit1131b0a4af911de50b22239cabdf6dcd3f15df15 (patch)
treef2b41a7750240e9b338ca28679e220e06e31591e /Documentation
parent617fcb673090e495f58565ff0171d07abdad53a7 (diff)
dmaengine: rcar-dmac: Make DMAC reinit during system resume explicit
The current (empty) system sleep callbacks rely on the PM core to force a runtime resume to reinitialize the DMAC registers during system resume. Without a reinitialization, e.g. SCIF DMA will hang silently after a system resume on R-Car Gen3. Make this explicit by using pm_runtime_force_{suspend,resume}() as the system sleep callbacks instead. Use SET_LATE_SYSTEM_SLEEP_PM_OPS() as DMA engines must be initialized before all DMA slave devices. Fixes: 17218e0092f8 "PM / genpd: Stop/start devices without pm_runtime_force_suspend/resume()" Suggested-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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