[PATCH 01/15] accel/ivpu: Add wp0_during_power_up WA

[Jacek Lawrynowicz]

From: "Wachowski, Karol" <karol.wachowski at intel.com>

Send workpoint 0 request during power up on 37xx.
This is needed in rare case where WP0 was not sent
during power down due to device hang.

Signed-off-by: Wachowski, Karol <karol.wachowski at intel.com>
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz at linux.intel.com>
---
 drivers/accel/ivpu/ivpu_drv.h |  1 +
 drivers/accel/ivpu/ivpu_hw.c  | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/accel/ivpu/ivpu_drv.h b/drivers/accel/ivpu/ivpu_drv.h
index 39df96a7623b..823e10c41816 100644
--- a/drivers/accel/ivpu/ivpu_drv.h
+++ b/drivers/accel/ivpu/ivpu_drv.h
@@ -102,6 +102,7 @@ struct ivpu_wa_table {
 	bool interrupt_clear_with_0;
 	bool disable_clock_relinquish;
 	bool disable_d0i3_msg;
+	bool wp0_during_power_up;
 };
 
 struct ivpu_hw_info;
diff --git a/drivers/accel/ivpu/ivpu_hw.c b/drivers/accel/ivpu/ivpu_hw.c
index 9f5e3875baf1..daf1e4afb479 100644
--- a/drivers/accel/ivpu/ivpu_hw.c
+++ b/drivers/accel/ivpu/ivpu_hw.c
@@ -64,10 +64,14 @@ static void wa_init(struct ivpu_device *vdev)
 	if (ivpu_device_id(vdev) == PCI_DEVICE_ID_LNL)
 		vdev->wa.disable_clock_relinquish = true;
 
+	if (ivpu_hw_ip_gen(vdev) == IVPU_HW_IP_37XX)
+		vdev->wa.wp0_during_power_up = true;
+
 	IVPU_PRINT_WA(punit_disabled);
 	IVPU_PRINT_WA(clear_runtime_mem);
 	IVPU_PRINT_WA(interrupt_clear_with_0);
 	IVPU_PRINT_WA(disable_clock_relinquish);
+	IVPU_PRINT_WA(wp0_during_power_up);
 }
 
 static void timeouts_init(struct ivpu_device *vdev)
@@ -125,6 +129,13 @@ int ivpu_hw_power_up(struct ivpu_device *vdev)
 {
 	int ret;
 
+	if (IVPU_WA(wp0_during_power_up)) {
+		/* WP requests may fail when powering down, so issue WP 0 here */
+		ret = wp_disable(vdev);
+		if (ret)
+			ivpu_warn(vdev, "Failed to disable workpoint: %d\n", ret);
+	}
+
 	ret = ivpu_hw_btrs_d0i3_disable(vdev);
 	if (ret)
 		ivpu_warn(vdev, "Failed to disable D0I3: %d\n", ret);
-- 
2.45.1