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accel/ivpu: Fix PCI D0 state entry in resume

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commit 3534eacbf1 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>
This commit is contained in:
Wachowski, Karol 2024-04-02 12:49:24 +02:00 committed by Greg Kroah-Hartman
parent c02ea077d7
commit 3158174b8c
1 changed files with 3 additions and 3 deletions
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6
drivers/accel/ivpu/ivpu_pm.c
View file

@ -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);