From eb7bd8d7fb727dcdbf4b1c145bba1169bc3c2d4a Mon Sep 17 00:00:00 2001
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Sat, 2 May 2020 01:13:11 +0200
Subject: [PATCH] mt76: mt7663: read tx streams from eeprom
Git-commit: eb7bd8d7fb727dcdbf4b1c145bba1169bc3c2d4a
Patch-mainline: v5.8-rc1
References: jsc#SLE-13430

Read tx stream configuration from eeprom/efuse

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c | 11 ++++++-----
 drivers/net/wireless/mediatek/mt76/mt7615/eeprom.h |  3 +++
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c
index 521705015036..7440ad13c74b 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c
@@ -130,14 +130,15 @@ mt7615_eeprom_parse_hw_band_cap(struct mt7615_dev *dev)
 static void mt7615_eeprom_parse_hw_cap(struct mt7615_dev *dev)
 {
 	u8 *eeprom = dev->mt76.eeprom.data;
-	u8 tx_mask;
+	u8 tx_mask, max_nss;
 
 	mt7615_eeprom_parse_hw_band_cap(dev);
 
 	if (is_mt7663(&dev->mt76)) {
-		tx_mask = 2;
+		max_nss = 2;
+		tx_mask = FIELD_GET(MT_EE_HW_CONF1_TX_MASK,
+				    eeprom[MT7663_EE_HW_CONF1]);
 	} else {
-		u8 max_nss;
 		u32 val;
 
 		/* read tx-rx mask from eeprom */
@@ -146,9 +147,9 @@ static void mt7615_eeprom_parse_hw_cap(struct mt7615_dev *dev)
 
 		tx_mask =  FIELD_GET(MT_EE_NIC_CONF_TX_MASK,
 				     eeprom[MT_EE_NIC_CONF_0]);
-		if (!tx_mask || tx_mask > max_nss)
-			tx_mask = max_nss;
 	}
+	if (!tx_mask || tx_mask > max_nss)
+		tx_mask = max_nss;
 
 	dev->chainmask = BIT(tx_mask) - 1;
 	dev->mphy.antenna_mask = dev->chainmask;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.h b/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.h
index 3dd7009e5836..aad82b600c63 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.h
@@ -39,6 +39,7 @@ enum mt7615_eeprom_field {
 	MT7663_EE_TX0_2G_TARGET_POWER =		0x123,
 	MT_EE_TX2_5G_G0_TARGET_POWER =		0x142,
 	MT_EE_TX3_5G_G0_TARGET_POWER =		0x16a,
+	MT7663_EE_HW_CONF1 =			0x1b0,
 
 	MT7615_EE_MAX =				0x3bf,
 	MT7622_EE_MAX =				0x3db,
@@ -55,6 +56,8 @@ enum mt7615_eeprom_field {
 #define MT_EE_NIC_CONF_TX_MASK			GENMASK(7, 4)
 #define MT_EE_NIC_CONF_RX_MASK			GENMASK(3, 0)
 
+#define MT_EE_HW_CONF1_TX_MASK			GENMASK(2, 0)
+
 #define MT_EE_NIC_CONF_TSSI_2G			BIT(5)
 #define MT_EE_NIC_CONF_TSSI_5G			BIT(6)
 
-- 
2.16.4