mt76: mt7921: fix aggr length histogram

Fix register definitions for 802.11 aggr length histogram estimation.

Fixes: 474a9f21 ("mt76: mt7921: add debugfs support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c

@@ -44,14 +44,13 @@ mt7921_ampdu_stat_read_phy(struct mt7921_phy *phy,
 		range[i] = mt76_rr(dev, MT_MIB_ARNG(0, i));
 
 	for (i = 0; i < ARRAY_SIZE(bound); i++)
-		bound[i] = MT_MIB_ARNCR_RANGE(range[i / 4], i) + 1;
+		bound[i] = MT_MIB_ARNCR_RANGE(range[i / 4], i % 4) + 1;
 
 	seq_printf(file, "\nPhy0\n");
 
 	seq_printf(file, "Length: %8d | ", bound[0]);
 	for (i = 0; i < ARRAY_SIZE(bound) - 1; i++)
-		seq_printf(file, "%3d -%3d | ",
-			   bound[i] + 1, bound[i + 1]);
+		seq_printf(file, "%3d  %3d | ", bound[i] + 1, bound[i + 1]);
 
 	seq_puts(file, "\nCount:  ");
 	for (i = 0; i < ARRAY_SIZE(bound); i++)

drivers/net/wireless/mediatek/mt76/mt7921/regs.h

@@ -128,9 +128,9 @@
 #define MT_MIB_MB_SDR2(_band, n)	MT_WF_MIB(_band, 0x108 + ((n) << 4))
 #define MT_MIB_FRAME_RETRIES_COUNT_MASK	GENMASK(15, 0)
 
-#define MT_TX_AGG_CNT(_band, n)		MT_WF_MIB(_band, 0x0a8 + ((n) << 2))
-#define MT_TX_AGG_CNT2(_band, n)	MT_WF_MIB(_band, 0x164 + ((n) << 2))
-#define MT_MIB_ARNG(_band, n)		MT_WF_MIB(_band, 0x4b8 + ((n) << 2))
+#define MT_TX_AGG_CNT(_band, n)		MT_WF_MIB(_band, 0x7dc + ((n) << 2))
+#define MT_TX_AGG_CNT2(_band, n)	MT_WF_MIB(_band, 0x7ec + ((n) << 2))
+#define MT_MIB_ARNG(_band, n)		MT_WF_MIB(_band, 0x0b0 + ((n) << 2))
 #define MT_MIB_ARNCR_RANGE(val, n)	(((val) >> ((n) << 3)) & GENMASK(7, 0))
 
 #define MT_WTBLON_TOP_BASE		0x34000