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| author | Tze Yee Ng <tze.yee.ng@altera.com> | 2026-05-25 10:10:22 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2026-06-11 08:28:42 +0300 |
| commit | df0c2dc68770cf43f15df40b184df030b850ea05 (patch) | |
| tree | 3262cb5a9a9a556a6814000108ab8ec4aefa8682 /scripts | |
| parent | dc6d681e1571c89cd38145926fb2513d70a633e1 (diff) | |
| download | linux-df0c2dc68770cf43f15df40b184df030b850ea05.tar.xz | |
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>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions