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wifi: mt76: mt7925: add pci restore for hibernate

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Due to hibernation causing a power off and power on,
this modification adds mt7925_pci_restore callback function for kernel.
When hibernation resumes, it calls mt7925_pci_restore to reset the device,
allowing it to return to the state it was in before the power off.

Signed-off-by: Jack Kao <[email protected]>
Signed-off-by: Ming Yen Hsieh <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Jack Kao
2025-09-01 16:48:07 +02:00
committed by Felix Fietkau
parent 15fa4e33ee
commit 3400b1ba33
1 changed files with 23 additions and 3 deletions
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mt7925/pci.c
+23 -3
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@@ -529,7 +529,7 @@ restore_suspend:
return err;
}
static int mt7925_pci_resume(struct device *device)
static int _mt7925_pci_resume(struct device *device, bool restore)
{
struct pci_dev *pdev = to_pci_dev(device);
struct mt76_dev *mdev = pci_get_drvdata(pdev);
@@ -569,6 +569,9 @@ static int mt7925_pci_resume(struct device *device)
napi_schedule(&mdev->tx_napi);
local_bh_enable();
if (restore)
goto failed;
mt76_connac_mcu_set_hif_suspend(mdev, false, false);
ret = wait_event_timeout(dev->wait,
dev->hif_resumed, 3 * HZ);
@@ -585,7 +588,7 @@ static int mt7925_pci_resume(struct device *device)
failed:
pm->suspended = false;
if (err < 0)
if (err < 0 || restore)
mt792x_reset(&dev->mt76);
return err;
@@ -596,7 +599,24 @@ static void mt7925_pci_shutdown(struct pci_dev *pdev)
mt7925_pci_remove(pdev);
}
static DEFINE_SIMPLE_DEV_PM_OPS(mt7925_pm_ops, mt7925_pci_suspend, mt7925_pci_resume);
static int mt7925_pci_resume(struct device *device)
{
return _mt7925_pci_resume(device, false);
}
static int mt7925_pci_restore(struct device *device)
{
return _mt7925_pci_resume(device, true);
}
static const struct dev_pm_ops mt7925_pm_ops = {
.suspend = pm_sleep_ptr(mt7925_pci_suspend),
.resume = pm_sleep_ptr(mt7925_pci_resume),
.freeze = pm_sleep_ptr(mt7925_pci_suspend),
.thaw = pm_sleep_ptr(mt7925_pci_resume),
.poweroff = pm_sleep_ptr(mt7925_pci_suspend),
.restore = pm_sleep_ptr(mt7925_pci_restore),
};
static struct pci_driver mt7925_pci_driver = {
.name = KBUILD_MODNAME,