[PATCH] wifi: mt76: mt7925: support new WoW pattern TLV

[Sean Wang <sean.wang@kernel.org>]

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

Newer mt7925 firmware uses a shorter WoW pattern TLV with rsv[3]. Select
the v2 layout based on the firmware build date, while keeping the old
layout for older firmware.

This also makes the WoW pattern handling compatible with newer devices
such as MT7928.

Tested-by: Stella Liu <yu-ching.liu@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
---
 .../net/wireless/mediatek/mt76/mt7925/mcu.c   | 30 +++++++++++++++++--
 .../net/wireless/mediatek/mt76/mt7925/mcu.h   |  3 ++
 2 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
index 17bc7204f02a..32297f4a5e0b 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
@@ -10,6 +10,24 @@
 
 #define MT_STA_BFER			BIT(0)
 #define MT_STA_BFEE			BIT(1)
+#define MT7925_WOW_PATTERN_NEW_FW_DATE	"20260414153105"
+
+static bool mt7925_mcu_wow_pattern_old_tlv(struct mt76_dev *dev)
+{
+	const char *fw_version = dev->hw->wiphy->fw_version;
+	const char *build_date = strrchr(fw_version, '-');
+
+	if (!is_mt7925(dev))
+		return false;
+
+	if (!build_date)
+		return false;
+
+	build_date++;
+
+	return strncmp(build_date, MT7925_WOW_PATTERN_NEW_FW_DATE,
+		       strlen(MT7925_WOW_PATTERN_NEW_FW_DATE)) < 0;
+}
 
 int mt7925_mcu_parse_response(struct mt76_dev *mdev, int cmd,
 			      struct sk_buff *skb, int seq)
@@ -219,6 +237,8 @@ mt7925_mcu_set_wow_pattern(struct mt76_dev *dev,
 	struct mt76_vif_link *mvif = (struct mt76_vif_link *)vif->drv_priv;
 	struct mt7925_wow_pattern_tlv *tlv;
 	struct sk_buff *skb;
+	int tlv_len;
+	bool old_tlv;
 	struct {
 		u8 bss_idx;
 		u8 pad[3];
@@ -226,14 +246,18 @@ mt7925_mcu_set_wow_pattern(struct mt76_dev *dev,
 		.bss_idx = mvif->idx,
 	};
 
-	skb = mt76_mcu_msg_alloc(dev, NULL, sizeof(hdr) + sizeof(*tlv));
+	old_tlv = mt7925_mcu_wow_pattern_old_tlv(dev);
+	tlv_len = old_tlv ? sizeof(struct mt7925_wow_pattern_tlv) :
+			    MT7925_WOW_PATTERN_TLV_V2_SIZE;
+
+	skb = mt76_mcu_msg_alloc(dev, NULL, sizeof(hdr) + tlv_len);
 	if (!skb)
 		return -ENOMEM;
 
 	skb_put_data(skb, &hdr, sizeof(hdr));
-	tlv = (struct mt7925_wow_pattern_tlv *)skb_put(skb, sizeof(*tlv));
+	tlv = (struct mt7925_wow_pattern_tlv *)skb_put_zero(skb, tlv_len);
 	tlv->tag = cpu_to_le16(UNI_SUSPEND_WOW_PATTERN);
-	tlv->len = cpu_to_le16(sizeof(*tlv));
+	tlv->len = cpu_to_le16(tlv_len);
 	tlv->bss_idx = 0xF;
 	tlv->data_len = pattern->pattern_len;
 	tlv->enable = enable;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.h b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.h
index 293f173b23dd..26e9d90ad503 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.h
@@ -587,6 +587,9 @@ struct mt7925_wow_pattern_tlv {
 	u8 rsv[4];
 };
 
+#define MT7925_WOW_PATTERN_TLV_V2_SIZE	\
+	(offsetof(struct mt7925_wow_pattern_tlv, rsv) + 3)
+
 struct roc_acquire_tlv {
 	__le16 tag;
 	__le16 len;
-- 
2.43.0