accel/amdxdna: Poll MPNPU_PWAITMODE after requesting firmware suspend

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After issuing a firmware suspend request, the driver must ensure that the
suspend operation has completed before proceeding. Add polling of the
MPNPU_PWAITMODE register to confirm that the firmware has fully entered
the suspended state. This prevents race conditions where subsequent
operations assume the firmware is idle before it has actually completed
its suspend sequence.

Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Maciej Falkowski <maciej.falkowski@linux.intel.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20251202165427.507414-1-lizhi.hou@amd.com

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This commit is contained in:

Lizhi Hou 2025-12-02 08:54:27 -08:00

parent 439be5c580

commit 3d3ac202c7

8 changed files with 35 additions and 1 deletions

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9

drivers/accel/amdxdna/aie2_message.c

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2

drivers/accel/amdxdna/aie2_pci.h

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15

drivers/accel/amdxdna/aie2_psp.c

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2

drivers/accel/amdxdna/npu1_regs.c

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2

drivers/accel/amdxdna/npu2_regs.c

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2

drivers/accel/amdxdna/npu4_regs.c

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2

drivers/accel/amdxdna/npu5_regs.c

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2

drivers/accel/amdxdna/npu6_regs.c

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