[PATCH rtw-next] wifi: rtw89: pci: add quirks to avoid using PCI DAC for X99 board across chips

[PATCH rtw-next] wifi: rtw89: pci: add quirks to avoid using PCI DAC for X99 board across chips

[Ping-Ke Shih]

RTL8852BE can't enable 36-bits DMA on Intel X99 motherboard, which isn't
a sold combination so add quirk across all chips, not only on specific chip
RTL8852BE,

Reported-by: Iohann Tachy <iohann.tachy@gmail.com>
Closes: https://lore.kernel.org/linux-wireless/CAPVS0eLR5KCmBEkGHnSxwKQM0hwCSaL0TSaTMNT_GJQK1sT8hg@mail.gmail.com/T/#m976028ea900ea6f2c5fbbd1ff14a92377227f555
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/core.h |  1 +
 drivers/net/wireless/realtek/rtw89/pci.c  | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index 4778957d6b2d..0c894ba73a65 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -5205,6 +5205,7 @@ enum rtw89_flags {
 
 enum rtw89_quirks {
 	RTW89_QUIRK_PCI_BER,
+	RTW89_QUIRK_PCI_NO_DAC,
 	RTW89_QUIRK_THERMAL_PROT_120C,
 	RTW89_QUIRK_THERMAL_PROT_110C,
 
diff --git a/drivers/net/wireless/realtek/rtw89/pci.c b/drivers/net/wireless/realtek/rtw89/pci.c
index 43c61b3dc969..fded15b2029f 100644
--- a/drivers/net/wireless/realtek/rtw89/pci.c
+++ b/drivers/net/wireless/realtek/rtw89/pci.c
@@ -19,6 +19,18 @@ MODULE_PARM_DESC(disable_clkreq, "Set Y to disable PCI clkreq support");
 MODULE_PARM_DESC(disable_aspm_l1, "Set Y to disable PCI ASPM L1 support");
 MODULE_PARM_DESC(disable_aspm_l1ss, "Set Y to disable PCI L1SS support");
 
+static const struct dmi_system_id rtw89_pci_quirks[] = {
+	{
+		.ident = "MACHINIST X99-RS9",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "MACHINIST"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "X99-RS9"),
+		},
+		.driver_data = (void *)RTW89_QUIRK_PCI_NO_DAC,
+	},
+	{},
+};
+
 static int rtw89_pci_get_phy_offset_by_link_speed(struct rtw89_dev *rtwdev,
 						  u32 *phy_offset)
 {
@@ -3305,6 +3317,9 @@ static bool rtw89_pci_is_dac_compatible_bridge(struct rtw89_dev *rtwdev)
 	if (!bridge)
 		return false;
 
+	if (test_bit(RTW89_QUIRK_PCI_NO_DAC, rtwdev->quirks))
+		return false;
+
 	switch (bridge->vendor) {
 	case PCI_VENDOR_ID_INTEL:
 		return true;
@@ -4765,6 +4780,7 @@ int rtw89_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	rtwdev->hci.cpwm_addr = pci_info->cpwm_addr;
 
 	rtw89_check_quirks(rtwdev, info->quirks);
+	rtw89_check_quirks(rtwdev, rtw89_pci_quirks);
 	rtw89_check_pci_ssid_quirks(rtwdev, pdev, pci_info->ssid_quirks);
 
 	SET_IEEE80211_DEV(rtwdev->hw, &pdev->dev);

base-commit: 4c1552473acf03cad828884b4e1c90b97a89b265
-- 
2.25.1