Re: [PATCH] accel/ivpu/37xx: Fix interrupt_clear_with_0 WA initialization

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On 12/4/2023 5:23 AM, Jacek Lawrynowicz wrote:
From: Andrzej Kacprowski <Andrzej.Kacprowski@xxxxxxxxx>

Using PCI Device ID/Revision to initialize the interrupt_clear_with_0
workaround is problematic - there are many pre-production
steppings with different behavior, even with the same PCI ID/Revision

Instead of checking for PCI Device ID/Revision, check the VPU
buttress interrupt status register behavior - if this register
is not zero after writing 1s it means there register is RW
instead of RW1C and we need to enable the interrupt_clear_with_0
workaround.

Fixes: 7f34e01f77f8 ("accel/ivpu: Clear specific interrupt status bits on C0")
Signed-off-by: Andrzej Kacprowski <Andrzej.Kacprowski@xxxxxxxxx>
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@xxxxxxxxxxxxxxx>

Reviewed-by: Jeffrey Hugo <quic_jhugo@xxxxxxxxxxx>



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