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From:   Ryder Lee <ryder.lee@mediatek.com>
To:     Felix Fietkau <nbd@nbd.name>, <linux-wireless@vger.kernel.org>
CC:     Lorenzo Bianconi <lorenzo.bianconi@redhat.com>,
        Shayne Chen <shayne.chen@mediatek.com>,
        Evelyn Tsai <evelyn.tsai@mediatek.com>,
        <linux-mediatek@lists.infradead.org>,
        Ryder Lee <ryder.lee@mediatek.com>
Subject: [PATCH 1/3] wifi: mt76: mt7915: add basedband Txpower info into debugfs
Date:   Mon, 21 Nov 2022 03:51:28 +0800
Message-ID: <c73db8d9bb03efe8cb403434aeedad25d958e258.1668973479.git.ryder.lee@mediatek.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

This helps user to debug Txpower propagation path easily.

Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
---
 .../net/wireless/mediatek/mt76/mt7915/debugfs.c  | 16 +++++++++++++---
 drivers/net/wireless/mediatek/mt76/mt7915/regs.h |  3 +++
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
index 096cb8a4db3d..1244f5c4172b 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
@@ -967,11 +967,16 @@ 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;
+	int i, ret;
+
+	ret = mt7915_mcu_get_txpower_sku(phy, txpower, sizeof(txpower));
+	if (ret)
+		return ret;
+
+	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 +987,11 @@ mt7915_rate_txpower_show(struct seq_file *file, void *data)
 		buf += mt7915_sku_group_len[i];
 	}
 
+	/* Txpower propagation path: TMAC -> TXV -> BBP */
+	seq_printf(file, "\nBaseband transmit power %ld\n",
+		   mt76_get_field(dev, MT_WF_PHY_TPC_CTRL_STAT(phy->band_idx),
+				  MT_WF_PHY_TPC_POWER));
+
 	return 0;
 }
 
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/regs.h b/drivers/net/wireless/mediatek/mt76/mt7915/regs.h
index 0c61f1256f3b..00fc31cb7e82 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/regs.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/regs.h
@@ -1179,6 +1179,9 @@ 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_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)
-- 
2.36.1