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.

Change-Id: I6a49929c0e4e3ee8b8e10345ea04a0211d0e3e37
Signed-off-by: Chin-Yen Lee <[email protected]>
Signed-off-by: Ping-Ke Shih <[email protected]>
Link: https://patch.msgid.link/[email protected]

Author: Chin-Yen Lee

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

@@ -4084,6 +4084,15 @@ 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;
@@ -4302,6 +4311,7 @@ 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);
 }