linux-kernel - [PATCH] xhci:fix issue with resume from system Sx state in zhaoxin platform

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Message-ID: <20230420093603.3344-1-WeitaoWang-oc@zhaoxin.com>
Date:   Thu, 20 Apr 2023 17:36:03 +0800
From:   Weitao Wang <WeitaoWang-oc@...oxin.com>
To:     <gregkh@...uxfoundation.org>, <mathias.nyman@...el.com>,
        <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <tonywwang@...oxin.com>, <weitaowang@...oxin.com>
Subject: [PATCH] xhci:fix issue with resume from system Sx state in zhaoxin platform

On Zhaoxin ZX-100 project, xHCI can't work normally after resume
from system Sx state. To fix this issue, when resume from system
Sx state, reinitialize xHCI instead of restore.

Signed-off-by: Weitao Wang <WeitaoWang-oc@...oxin.com>
---
 drivers/usb/host/xhci-pci.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 6db07ca419c3..b0f0ed088f81 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -334,6 +334,9 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
 	     pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_4))
 		xhci->quirks |= XHCI_NO_SOFT_RETRY;
 
+	if (pdev->vendor == PCI_VENDOR_ID_ZHAOXIN && pdev->device == 0x9202)
+		xhci->quirks |= XHCI_RESET_ON_RESUME;
+
 	/* xHC spec requires PCI devices to support D3hot and D3cold */
 	if (xhci->hci_version >= 0x120)
 		xhci->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
-- 
2.32.0