wifi: rtw89: pci: disable PCI completion timeout control

Realtek's chips follow suggestion of PCIe spec to design the max timeout of
PCI completion, but some PCIe host reply too slow to meet it and lead PCI
AER. Disable PCI completion timeout function via PCI configuration to
avoid the AER.

Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20241225122804.10214-1-pkshih@realtek.com

Author: Chin-Yen Lee

drivers/net/wireless/realtek/rtw89/pci.c

@@ -4078,6 +4078,15 @@ static void rtw89_pci_l1ss_cfg(struct rtw89_dev *rtwdev)
 		rtw89_pci_l1ss_set(rtwdev, true);
 }
 
+static void rtw89_pci_cpl_timeout_cfg(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
+	struct pci_dev *pdev = rtwpci->pdev;
+
+	pcie_capability_set_word(pdev, PCI_EXP_DEVCTL2,
+				 PCI_EXP_DEVCTL2_COMP_TMOUT_DIS);
+}
+
 static int rtw89_pci_poll_io_idle_ax(struct rtw89_dev *rtwdev)
 {
 	int ret = 0;
@@ -4291,6 +4300,7 @@ void rtw89_pci_basic_cfg(struct rtw89_dev *rtwdev, bool resume)
 
 	rtw89_pci_disable_eq(rtwdev);
 	rtw89_pci_filter_out(rtwdev);
+	rtw89_pci_cpl_timeout_cfg(rtwdev);
 	rtw89_pci_link_cfg(rtwdev);
 	rtw89_pci_l1ss_cfg(rtwdev);
 }