[PATCH 5.12 122/242] rtw88: add quirks to disable pci capabilities

Greg Kroah-Hartman
2021-07-15T19:12:41Z

From: Ping-Ke Shih <pkshih@realtek.com>

[ Upstream commit 956c6d4f20c5446727e0c912dd8f527f2dc7b779 ]

8821CE with ASPM cannot work properly on Protempo Ltd L116HTN6SPW. Add a
quirk to disable the cap.

The reporter describes the symptom is that this module (driver) causes
frequent freezes, randomly but usually within a few minutes of running
(thus very soon after boot): screen display remains frozen, no response
to either keyboard or mouse input. All I can do is to hold the power
button to power off, then reboot.

Reported-by: Paul Szabo <psz2036@gmail.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210607012254.6306-1-pkshih@realtek.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/realtek/rtw88/pci.c | 32 ++++++++++++++++++++++++
1 file changed, 32 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw88/pci.c b/drivers/net/wireless/realtek/rtw88/pci.c
index 6b5c885798a4..e5110d2cbc1d 100644
--- a/drivers/net/wireless/realtek/rtw88/pci.c
+++ b/drivers/net/wireless/realtek/rtw88/pci.c
@@ -2,6 +2,7 @@
/* Copyright(c) 2018-2019 Realtek Corporation
*/

+#include <linux/dmi.h>
#include <linux/module.h>
#include <linux/pci.h>
#include "main.h"
@@ -1598,6 +1599,36 @@ static void rtw_pci_napi_deinit(struct rtw_dev *rtwdev)
netif_napi_del(&rtwpci->napi);
}

+enum rtw88_quirk_dis_pci_caps {
+ QUIRK_DIS_PCI_CAP_MSI,
+ QUIRK_DIS_PCI_CAP_ASPM,
+};
+
+static int disable_pci_caps(const struct dmi_system_id *dmi)
+{
+ uintptr_t dis_caps = (uintptr_t)dmi->driver_data;
+
+ if (dis_caps & BIT(QUIRK_DIS_PCI_CAP_MSI))
+ rtw_disable_msi = true;
+ if (dis_caps & BIT(QUIRK_DIS_PCI_CAP_ASPM))
+ rtw_pci_disable_aspm = true;
+
+ return 1;
+}
+
+static const struct dmi_system_id rtw88_pci_quirks[] = {
+ {
+ .callback = disable_pci_caps,
+ .ident = "Protempo Ltd L116HTN6SPW",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Protempo Ltd"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "L116HTN6SPW"),
+ },
+ .driver_data = (void *)BIT(QUIRK_DIS_PCI_CAP_ASPM),
+ },
+ {}
+};
+
int rtw_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
@@ -1648,6 +1679,7 @@ int rtw_pci_probe(struct pci_dev *pdev,
goto err_destroy_pci;
}

+ dmi_check_system(rtw88_pci_quirks);
rtw_pci_phy_cfg(rtwdev);

ret = rtw_register_hw(rtwdev, hw);
--
2.30.2