From: Quan Zhou quan.zhou@mediatek.com
[ Upstream commit 9300ae0cd9e8f2407b20e0e67ee3ea03dc8b06af ]
A sub-process of Wifi L0.5 reset will make chip common partition enter low power, and have chance lead to Bluetooth host-to-chip command timeout, modify the software flow according to the chip's design to solve the problem.
Fixes: c948b5da6bbe ("wifi: mt76: mt7925: add Mediatek Wi-Fi7 driver for mt7925 chips") Signed-off-by: Quan Zhou quan.zhou@mediatek.com Signed-off-by: Ming Yen Hsieh mingyen.hsieh@mediatek.com Signed-off-by: Felix Fietkau nbd@nbd.name Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/mediatek/mt76/mt7925/pci.c | 2 ++ drivers/net/wireless/mediatek/mt76/mt792x_regs.h | 3 +++ 2 files changed, 5 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c index 08ef75e24e1cf..c16d683e4891e 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c +++ b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c @@ -386,6 +386,8 @@ static int mt7925_pci_probe(struct pci_dev *pdev,
dev_info(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
+ mt76_rmw_field(dev, MT_HW_EMI_CTL, MT_HW_EMI_CTL_SLPPROT_EN, 1); + ret = mt792x_wfsys_reset(dev); if (ret) goto err_free_dev; diff --git a/drivers/net/wireless/mediatek/mt76/mt792x_regs.h b/drivers/net/wireless/mediatek/mt76/mt792x_regs.h index a99af23e4b564..d7f9b24cd665f 100644 --- a/drivers/net/wireless/mediatek/mt76/mt792x_regs.h +++ b/drivers/net/wireless/mediatek/mt76/mt792x_regs.h @@ -389,6 +389,9 @@ #define MT_HW_CHIPID 0x70010200 #define MT_HW_REV 0x70010204
+#define MT_HW_EMI_CTL 0x18011100 +#define MT_HW_EMI_CTL_SLPPROT_EN BIT(1) + #define MT_PCIE_MAC_BASE 0x10000 #define MT_PCIE_MAC(ofs) (MT_PCIE_MAC_BASE + (ofs)) #define MT_PCIE_MAC_INT_ENABLE MT_PCIE_MAC(0x188)