[RFT rtw-next] wifi: rtw88: add quirks to disable PCI ASPM for HP P3S95EA#ACB

[Ping-Ke Shih <pkshih@realtek.com>]

On an HP laptop (P3S95EA#ACB) equipped with a Realtek RTL8821CE 802.11ac
PCIe adapter (PCI ID: 10ec:c821), the system experiences a hard lockup
(complete freeze of the UI and kernel, sysrq doesn't work, requires
holding the power button) when the WiFi adapter enters the power
saving state.

Add a quirk to disable ASPM.

Reported-by: LB F <goainwo@gmail.com>
Closes: https://lore.kernel.org/linux-wireless/CALdGYqSQ1Ko2TTBhUizMu_FvLMUAuQfFrVwS10n_C-LSQJQQkQ@mail.gmail.com/
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw88/pci.c | 30 ++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw88/pci.c b/drivers/net/wireless/realtek/rtw88/pci.c
index ec0a45bfb670..0b60a0ce96a1 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"
@@ -1744,6 +1745,34 @@ const struct pci_error_handlers rtw_pci_err_handler = {
 };
 EXPORT_SYMBOL(rtw_pci_err_handler);
 
+enum rtw88_quirk_dis_pci_caps {
+	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_ASPM))
+		rtw_pci_disable_aspm = true;
+
+	return 1;
+}
+
+static const struct dmi_system_id rtw88_pci_quirks[] = {
+	{
+		.callback = disable_pci_caps,
+		.ident = "HP Notebook - P3S95EA#ACB",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "HP"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "HP Notebook"),
+			DMI_MATCH(DMI_PRODUCT_SKU, "P3S95EA#ACB"),
+		},
+		.driver_data = (void *)BIT(QUIRK_DIS_PCI_CAP_ASPM),
+	},
+	{}
+};
+
 int rtw_pci_probe(struct pci_dev *pdev,
 		  const struct pci_device_id *id)
 {
@@ -1808,6 +1837,7 @@ int rtw_pci_probe(struct pci_dev *pdev,
 	    bridge && bridge->vendor == PCI_VENDOR_ID_INTEL)
 		rtwpci->rx_no_aspm = true;
 
+	dmi_check_system(rtw88_pci_quirks);
 	rtw_pci_phy_cfg(rtwdev);
 
 	ret = rtw_register_hw(rtwdev, hw);
-- 
2.25.1