wifi: mt76: mt7915: add basedband Txpower info into debugfs

This helps user to debug Txpower propagation path easily.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c

@@ -967,11 +967,18 @@ mt7915_rate_txpower_show(struct seq_file *file, void *data)
 		"RU484/SU40", "RU996/SU80", "RU2x996/SU160"
 	};
 	struct mt7915_phy *phy = file->private;
+	struct mt7915_dev *dev = phy->dev;
 	s8 txpower[MT7915_SKU_RATE_NUM], *buf;
-	int i;
+	u32 reg;
+	int i, ret;
+
+	ret = mt7915_mcu_get_txpower_sku(phy, txpower, sizeof(txpower));
+	if (ret)
+		return ret;
+
+	/* Txpower propagation path: TMAC -> TXV -> BBP */
+	seq_printf(file, "\nPhy %d\n", phy != &dev->phy);
 
-	seq_printf(file, "\nBand %d\n", phy != &phy->dev->phy);
-	mt7915_mcu_get_txpower_sku(phy, txpower, sizeof(txpower));
 	for (i = 0, buf = txpower; i < ARRAY_SIZE(mt7915_sku_group_len); i++) {
 		u8 mcs_num = mt7915_sku_group_len[i];
 
@@ -982,6 +989,12 @@ mt7915_rate_txpower_show(struct seq_file *file, void *data)
 		buf += mt7915_sku_group_len[i];
 	}
 
+	reg = is_mt7915(&dev->mt76) ? MT_WF_PHY_TPC_CTRL_STAT(phy->band_idx) :
+	      MT_WF_PHY_TPC_CTRL_STAT_MT7916(phy->band_idx);
+
+	seq_printf(file, "\nBaseband transmit power %ld\n",
+		   mt76_get_field(dev, reg, MT_WF_PHY_TPC_POWER));
+
 	return 0;
 }
 

drivers/net/wireless/mediatek/mt76/mt7915/regs.h

@@ -1186,6 +1186,10 @@ enum offs_rev {
 #define MT_WF_PHY_RXTD12_IRPI_SW_CLR_ONLY	BIT(18)
 #define MT_WF_PHY_RXTD12_IRPI_SW_CLR		BIT(29)
 
+#define MT_WF_PHY_TPC_CTRL_STAT(_phy)		MT_WF_PHY(0xe7a0 + ((_phy) << 16))
+#define MT_WF_PHY_TPC_CTRL_STAT_MT7916(_phy)	MT_WF_PHY(0xe7a0 + ((_phy) << 20))
+#define MT_WF_PHY_TPC_POWER			GENMASK(15, 8)
+
 #define MT_MCU_WM_CIRQ_BASE			0x89010000
 #define MT_MCU_WM_CIRQ(ofs)			(MT_MCU_WM_CIRQ_BASE + (ofs))
 #define MT_MCU_WM_CIRQ_IRQ_MASK_CLR_ADDR	MT_MCU_WM_CIRQ(0x80)