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

[Lizhi Hou <lizhi.hou@amd.com>]

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