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accel/ivpu: Fix PCI D0 state entry in resume

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BugLink: https://bugs.launchpad.net/bugs/2065912

commit 3534eacbf101f6e66105f03d869a03893407c384 upstream.

In case of failed power up we end up left in PCI D3hot
state making it impossible to access NPU registers on retry.
Enter D0 state on retry before proceeding with power up sequence.

Fixes: 28083ff18d ("accel/ivpu: Fix DevTLB errors on suspend/resume and recovery")
Cc: <stable@vger.kernel.org> # v6.8+
Signed-off-by: Wachowski, Karol <karol.wachowski@intel.com>
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240402104929.941186-4-jacek.lawrynowicz@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>
This commit is contained in:
Wachowski, Karol
2024-04-02 12:49:24 +02:00
committed by Stefan Bader
parent fcf92878d6
commit bd4e025042
1 changed files with 3 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/accel/ivpu/ivpu_pm.c
+3 -3
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@@ -74,10 +74,10 @@ static int ivpu_resume(struct ivpu_device *vdev)
{
int ret;
pci_set_power_state(to_pci_dev(vdev->drm.dev), PCI_D0);
pci_restore_state(to_pci_dev(vdev->drm.dev));
retry:
pci_restore_state(to_pci_dev(vdev->drm.dev));
pci_set_power_state(to_pci_dev(vdev->drm.dev), PCI_D0);
ret = ivpu_hw_power_up(vdev);
if (ret) {
ivpu_err(vdev, "Failed to power up HW: %d\n", ret);