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From: Karol Wachowski <karol.wachowski@linux.intel.com>
To: dri-devel@lists.freedesktop.org
Cc: oded.gabbay@gmail.com, jeff.hugo@oss.qualcomm.com,
	maciej.falkowski@linux.intel.com, lizhi.hou@amd.com,
	andrzej.kacprowski@linux.intel.com,
	Karol Wachowski <karol.wachowski@linux.intel.com>,
	stable@vger.kernel.org
Subject: [PATCH] accel/ivpu: Add disable clock relinquish workaround for NVL-A0
Date: Mon, 23 Mar 2026 10:50:29 +0100	[thread overview]
Message-ID: <20260323095029.64613-1-karol.wachowski@linux.intel.com> (raw)

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))
 		vdev->wa.disable_clock_relinquish = true;
 
 	if (ivpu_test_mode & IVPU_TEST_MODE_CLK_RELINQ_ENABLE)
-- 
2.43.0


             reply	other threads:[~2026-03-23  9:50 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-23  9:50 Karol Wachowski [this message]
2026-03-23 16:53 ` [PATCH] accel/ivpu: Add disable clock relinquish workaround for NVL-A0 Lizhi Hou
2026-03-24  8:32   ` Karol Wachowski

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