Re: [PATCH] accel/ivpu: Add disable clock relinquish workaround for NVL-A0

[Karol Wachowski <karol.wachowski@linux.intel.com>]

On 3/23/2026 5:53 PM, Lizhi Hou wrote:
> 
> On 3/23/26 02:50, Karol Wachowski wrote:
>> Turn on disable clock relinquish workaround for Nova Lake A0.
>> Without this workaround NPU may not power off correctly after
>> inference, leading to unexpected system behavior.
>>
>> Fixes: 550f4dd2cedd ("accel/ivpu: Add support for Nova Lake's NPU")
>> Cc: <stable@vger.kernel.org> # v6.19+
>>
>> Signed-off-by: Karol Wachowski <karol.wachowski@linux.intel.com>
>> ---
>>   drivers/accel/ivpu/ivpu_drv.h | 1 +
>>   drivers/accel/ivpu/ivpu_hw.c  | 6 ++++--
>>   2 files changed, 5 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/accel/ivpu/ivpu_drv.h b/drivers/accel/ivpu/
>> ivpu_drv.h
>> index 5b34b6f50e69..f1b6155065ff 100644
>> --- a/drivers/accel/ivpu/ivpu_drv.h
>> +++ b/drivers/accel/ivpu/ivpu_drv.h
>> @@ -35,6 +35,7 @@
>>   #define IVPU_HW_IP_60XX 60
>>     #define IVPU_HW_IP_REV_LNL_B0 4
>> +#define IVPU_HW_IP_REV_NVL_A0 0
>>     #define IVPU_HW_BTRS_MTL 1
>>   #define IVPU_HW_BTRS_LNL 2
>> diff --git a/drivers/accel/ivpu/ivpu_hw.c b/drivers/accel/ivpu/ivpu_hw.c
>> index d69cd0d93569..d4a9bcda4100 100644
>> --- a/drivers/accel/ivpu/ivpu_hw.c
>> +++ b/drivers/accel/ivpu/ivpu_hw.c
>> @@ -70,8 +70,10 @@ static void wa_init(struct ivpu_device *vdev)
>>       if (ivpu_hw_btrs_gen(vdev) == IVPU_HW_BTRS_MTL)
>>           vdev->wa.interrupt_clear_with_0 =
>> ivpu_hw_btrs_irqs_clear_with_0_mtl(vdev);
>>   -    if (ivpu_device_id(vdev) == PCI_DEVICE_ID_LNL &&
>> -        ivpu_revision(vdev) < IVPU_HW_IP_REV_LNL_B0)
>> +    if ((ivpu_device_id(vdev) == PCI_DEVICE_ID_LNL &&
>> +         ivpu_revision(vdev) < IVPU_HW_IP_REV_LNL_B0) ||
>> +        (ivpu_device_id(vdev) == PCI_DEVICE_ID_NVL &&
>> +         ivpu_revision(vdev) == IVPU_HW_IP_REV_NVL_A0))
> Reviewed-by: Lizhi.hou <lizhi.hou@amd.com>

Thank you, applied to drm-misc-fixes.

Karol

>>           vdev->wa.disable_clock_relinquish = true;
>>         if (ivpu_test_mode & IVPU_TEST_MODE_CLK_RELINQ_ENABLE)
>