[PATCH rtw-next] wifi: rtw89: pci: disable D3cold on ASUS ExpertBook B3/P3 series
From: Ping-Ke Shih <pkshih@realtek.com>
Date: 2026-09-11 06:54:30
Subsystem:
realtek wireless driver (rtw89), the rest · Maintainers:
Ping-Ke Shih, Linus Torvalds
From: Chin-Yen Lee <redacted> ASUS ExpertBook models (B3406CMA, B3606CMA, P3406CMA, and P3606CMA) may encounter PCIe link loss or recovery issues after entering the L2 low-power state associated with D3cold. Prevent these affected platforms from entering D3cold to avoid the problematic PCIe L2 state transition. Add a DMI quirk match table so that other non-affected platforms can continue utilizing D3cold power saving. Signed-off-by: Chin-Yen Lee <redacted> Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> --- drivers/net/wireless/realtek/rtw89/pci.c | 44 ++++++++++++++++++++++++ 1 file changed, 44 insertions(+)
diff --git a/drivers/net/wireless/realtek/rtw89/pci.c b/drivers/net/wireless/realtek/rtw89/pci.c
index 8c3f4eb52cc5..941fb5ca15b6 100644
--- a/drivers/net/wireless/realtek/rtw89/pci.c
+++ b/drivers/net/wireless/realtek/rtw89/pci.c@@ -4766,6 +4766,49 @@ static const struct rtw89_hci_ops rtw89_pci_ops = { .rst_bdram = rtw89_pci_reset_bdram, }; +static void rtw89_pci_d3cold_quirks(struct rtw89_dev *rtwdev, struct pci_dev *pdev) +{ + static const struct dmi_system_id d3cold_quirks[] = { + { + .ident = "ASUS EXPERTBOOK B3406CMA", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "ASUS"), + DMI_MATCH(DMI_BOARD_NAME, "B3406CMA"), + }, + }, + { + .ident = "ASUS EXPERTBOOK B3606CMA", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "ASUS"), + DMI_MATCH(DMI_BOARD_NAME, "B3606CMA"), + }, + }, + { + .ident = "ASUS EXPERTBOOK P3406CMA", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "ASUS"), + DMI_MATCH(DMI_BOARD_NAME, "P3406CMA"), + }, + }, + { + .ident = "ASUS EXPERTBOOK P3606CMA", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "ASUS"), + DMI_MATCH(DMI_BOARD_NAME, "P3606CMA"), + }, + }, + {}, + }; + const struct dmi_system_id *match; + + match = dmi_first_match(d3cold_quirks); + if (!match) + return; + + rtw89_debug(rtwdev, RTW89_DBG_STATE, "Disable D3Cold on %s\n", match->ident); + pci_d3cold_disable(pdev); +} + int rtw89_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct rtw89_dev *rtwdev;
@@ -4791,6 +4834,7 @@ int rtw89_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) rtwdev->hci.rpwm_addr = pci_info->rpwm_addr; rtwdev->hci.cpwm_addr = pci_info->cpwm_addr; + rtw89_pci_d3cold_quirks(rtwdev, pdev); rtw89_check_quirks(rtwdev, info->quirks); rtw89_check_pci_ssid_quirks(rtwdev, pdev, pci_info->ssid_quirks);
base-commit: f71dd599a98182d6bc34dce39977f928068ecd64 -- 2.25.1