[PATCH 07/11] wifi: mt76: mt792x: ensure MCU ready before ROM patch download

[sean.wang at kernel.org]

From: Sean Wang <sean.wang at mediatek.com>

Restart the MCU and poll FW state to ensure correct MCU status
before downloading the ROM patch.

This is a prerequisite for enabling MT7902 PCIe and has been
validated on MT7921 and MT7925 since they share the common code path.

Signed-off-by: Sean Wang <sean.wang at mediatek.com>
---
 drivers/net/wireless/mediatek/mt76/mt792x_core.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt792x_core.c b/drivers/net/wireless/mediatek/mt76/mt792x_core.c
index 2142fcc4ae27..152cfcca2f90 100644
--- a/drivers/net/wireless/mediatek/mt76/mt792x_core.c
+++ b/drivers/net/wireless/mediatek/mt76/mt792x_core.c
@@ -926,6 +926,13 @@ int mt792x_load_firmware(struct mt792x_dev *dev)
 {
 	int ret;
 
+	mt76_connac_mcu_restart(&dev->mt76);
+
+	if (!mt76_poll_msec(dev, MT_CONN_ON_MISC, MT_TOP_MISC_FW_STATE,
+			    MT_TOP_MISC2_FW_PWR_ON, 1000))
+		dev_warn(dev->mt76.dev,
+			 "MCU is not ready for firmware download\n");
+
 	ret = mt76_connac2_load_patch(&dev->mt76, mt792x_patch_name(dev));
 	if (ret)
 		return ret;
-- 
2.43.0