[PATCH 2/8] accel/ivpu: Remove d3hot_after_power_off WA

[Jacek Lawrynowicz]

Always enter D3hot after entering D0i3 an all platforms.
This minimizes power usage.

Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz at linux.intel.com>
---
 drivers/accel/ivpu/ivpu_drv.c     | 20 ++++++++++----------
 drivers/accel/ivpu/ivpu_drv.h     |  3 +--
 drivers/accel/ivpu/ivpu_hw_37xx.c |  4 +---
 drivers/accel/ivpu/ivpu_pm.c      |  7 ++-----
 4 files changed, 14 insertions(+), 20 deletions(-)

diff --git a/drivers/accel/ivpu/ivpu_drv.c b/drivers/accel/ivpu/ivpu_drv.c
index 39f6d1b98fd6..303d92753387 100644
--- a/drivers/accel/ivpu/ivpu_drv.c
+++ b/drivers/accel/ivpu/ivpu_drv.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (C) 2020-2023 Intel Corporation
+ * Copyright (C) 2020-2024 Intel Corporation
  */
 
 #include <linux/firmware.h>
@@ -387,12 +387,15 @@ int ivpu_shutdown(struct ivpu_device *vdev)
 {
 	int ret;
 
-	ivpu_prepare_for_reset(vdev);
+	/* Save PCI state before powering down as it sometimes gets corrupted if NPU hangs */
+	pci_save_state(to_pci_dev(vdev->drm.dev));
 
 	ret = ivpu_hw_power_down(vdev);
 	if (ret)
 		ivpu_warn(vdev, "Failed to power down HW: %d\n", ret);
 
+	pci_set_power_state(to_pci_dev(vdev->drm.dev), PCI_D3hot);
+
 	return ret;
 }
 
@@ -560,11 +563,11 @@ static int ivpu_dev_init(struct ivpu_device *vdev)
 	/* Power up early so the rest of init code can access VPU registers */
 	ret = ivpu_hw_power_up(vdev);
 	if (ret)
-		goto err_power_down;
+		goto err_shutdown;
 
 	ret = ivpu_mmu_global_context_init(vdev);
 	if (ret)
-		goto err_power_down;
+		goto err_shutdown;
 
 	ret = ivpu_mmu_init(vdev);
 	if (ret)
@@ -601,10 +604,8 @@ static int ivpu_dev_init(struct ivpu_device *vdev)
 	ivpu_mmu_reserved_context_fini(vdev);
 err_mmu_gctx_fini:
 	ivpu_mmu_global_context_fini(vdev);
-err_power_down:
-	ivpu_hw_power_down(vdev);
-	if (IVPU_WA(d3hot_after_power_off))
-		pci_set_power_state(to_pci_dev(vdev->drm.dev), PCI_D3hot);
+err_shutdown:
+	ivpu_shutdown(vdev);
 err_xa_destroy:
 	xa_destroy(&vdev->db_xa);
 	xa_destroy(&vdev->submitted_jobs_xa);
@@ -628,9 +629,8 @@ static void ivpu_bo_unbind_all_user_contexts(struct ivpu_device *vdev)
 static void ivpu_dev_fini(struct ivpu_device *vdev)
 {
 	ivpu_pm_disable(vdev);
+	ivpu_prepare_for_reset(vdev);
 	ivpu_shutdown(vdev);
-	if (IVPU_WA(d3hot_after_power_off))
-		pci_set_power_state(to_pci_dev(vdev->drm.dev), PCI_D3hot);
 
 	ivpu_jobs_abort_all(vdev);
 	ivpu_job_done_consumer_fini(vdev);
diff --git a/drivers/accel/ivpu/ivpu_drv.h b/drivers/accel/ivpu/ivpu_drv.h
index 7be0500d9bb8..bb4374d0eaec 100644
--- a/drivers/accel/ivpu/ivpu_drv.h
+++ b/drivers/accel/ivpu/ivpu_drv.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
- * Copyright (C) 2020-2023 Intel Corporation
+ * Copyright (C) 2020-2024 Intel Corporation
  */
 
 #ifndef __IVPU_DRV_H__
@@ -90,7 +90,6 @@
 struct ivpu_wa_table {
 	bool punit_disabled;
 	bool clear_runtime_mem;
-	bool d3hot_after_power_off;
 	bool interrupt_clear_with_0;
 	bool disable_clock_relinquish;
 	bool disable_d0i3_msg;
diff --git a/drivers/accel/ivpu/ivpu_hw_37xx.c b/drivers/accel/ivpu/ivpu_hw_37xx.c
index 9a0c9498baba..5e2865f9f7d6 100644
--- a/drivers/accel/ivpu/ivpu_hw_37xx.c
+++ b/drivers/accel/ivpu/ivpu_hw_37xx.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (C) 2020-2023 Intel Corporation
+ * Copyright (C) 2020-2024 Intel Corporation
  */
 
 #include "ivpu_drv.h"
@@ -75,7 +75,6 @@ static void ivpu_hw_wa_init(struct ivpu_device *vdev)
 {
 	vdev->wa.punit_disabled = false;
 	vdev->wa.clear_runtime_mem = false;
-	vdev->wa.d3hot_after_power_off = true;
 
 	REGB_WR32(VPU_37XX_BUTTRESS_INTERRUPT_STAT, BUTTRESS_ALL_IRQ_MASK);
 	if (REGB_RD32(VPU_37XX_BUTTRESS_INTERRUPT_STAT) == BUTTRESS_ALL_IRQ_MASK) {
@@ -86,7 +85,6 @@ static void ivpu_hw_wa_init(struct ivpu_device *vdev)
 
 	IVPU_PRINT_WA(punit_disabled);
 	IVPU_PRINT_WA(clear_runtime_mem);
-	IVPU_PRINT_WA(d3hot_after_power_off);
 	IVPU_PRINT_WA(interrupt_clear_with_0);
 }
 
diff --git a/drivers/accel/ivpu/ivpu_pm.c b/drivers/accel/ivpu/ivpu_pm.c
index 7cce1c928a7f..9cbd7af6576b 100644
--- a/drivers/accel/ivpu/ivpu_pm.c
+++ b/drivers/accel/ivpu/ivpu_pm.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (C) 2020-2023 Intel Corporation
+ * Copyright (C) 2020-2024 Intel Corporation
  */
 
 #include <linux/highmem.h>
@@ -58,15 +58,12 @@ static int ivpu_suspend(struct ivpu_device *vdev)
 {
 	int ret;
 
-	/* Save PCI state before powering down as it sometimes gets corrupted if NPU hangs */
-	pci_save_state(to_pci_dev(vdev->drm.dev));
+	ivpu_prepare_for_reset(vdev);
 
 	ret = ivpu_shutdown(vdev);
 	if (ret)
 		ivpu_err(vdev, "Failed to shutdown VPU: %d\n", ret);
 
-	pci_set_power_state(to_pci_dev(vdev->drm.dev), PCI_D3hot);
-
 	return ret;
 }
 
-- 
2.43.2