accel/ivpu: Disable buttress on device removal

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Use pci_set_power_state() to disable buttress when device is removed.
This is workaround of hardware bug that hangs the system.

Additionally not disabling buttress prevents CPU enter deeper Pkg-C
states when the driver is unloaded or fail to probe.

Fixes: 35b137630f ("accel/ivpu: Introduce a new DRM driver for Intel VPU")
Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230323125504.2586442-6-stanislaw.gruszka@linux.intel.com

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Stanislaw Gruszka 2023-03-23 13:55:01 +01:00 • committed by Jacek Lawrynowicz

parent a8fed6d1e0

commit 3d8b2727d8

3 changed files with 6 additions and 0 deletions

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4

drivers/accel/ivpu/ivpu_drv.c

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1

drivers/accel/ivpu/ivpu_drv.h

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1

drivers/accel/ivpu/ivpu_hw_mtl.c

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