Tze Yee NgandVinod Koul df0c2dc687 dmaengine: dw-axi-dmac: fix PM for system sleep and channel alloc ...

The driver only had runtime PM callbacks. If a channel stayed allocated
across system suspend/resume, the runtime usage count could remain
non-zero while hardware state (DMAC_CFG, clocks) was lost, and
axi_dma_runtime_resume() would not run to restore it.

Add system-sleep PM ops that use pm_runtime_force_suspend() and
pm_runtime_force_resume() so suspend/resume reuses the existing
axi_dma_suspend() and axi_dma_resume() paths.

Replace pm_runtime_get() with pm_runtime_resume_and_get() in
dma_chan_alloc_chan_resources() so clocks are enabled before a client
can immediately submit a transfer and touch MMIO.

Signed-off-by: Tze Yee Ng <tze.yee.ng@altera.com>
Link: https://patch.msgid.link/18bf778a3a1cc2f377ef8eb0d1508d8ac6371896.1779688569.git.tze.yee.ng@altera.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

2026-06-11 10:58:42 +05:30

..

dw-axi-dmac-platform.c

dmaengine: dw-axi-dmac: fix PM for system sleep and channel alloc

2026-06-11 10:58:42 +05:30

dw-axi-dmac.h

dmaengine: dw-axi-dmac: Add support for CV1800B DMA

2026-02-26 21:00:01 +05:30

Makefile

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