[PATCH rtw-next 1/2] wifi: rtw89: phy: add C2H event handler for report of FW scan

[Ping-Ke Shih <pkshih@realtek.com>]

From: Kuan-Chung Chen <damon.chen@realtek.com>

Newer firmware will notify driver of the Packet Detection (PD)
value on the channel after switch channels during FW scan.

Signed-off-by: Kuan-Chung Chen <damon.chen@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/fw.h  | 13 +++++++++
 drivers/net/wireless/realtek/rtw89/phy.c | 35 ++++++++++++++++++++++--
 drivers/net/wireless/realtek/rtw89/phy.h |  1 +
 3 files changed, 46 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw89/fw.h b/drivers/net/wireless/realtek/rtw89/fw.h
index 0d89083df49a..8e6e71971a7e 100644
--- a/drivers/net/wireless/realtek/rtw89/fw.h
+++ b/drivers/net/wireless/realtek/rtw89/fw.h
@@ -3620,6 +3620,19 @@ struct rtw89_c2h_ra_rpt {
 #define RTW89_C2H_RA_RPT_W3_MD_SEL_B2 BIT(15)
 #define RTW89_C2H_RA_RPT_W3_BW_B2 BIT(16)
 
+struct rtw89_c2h_fw_scan_rpt {
+	struct rtw89_c2h_hdr hdr;
+	u8 phy_idx;
+	u8 band;
+	u8 center_ch;
+	u8 ofdm_pd_idx; /* in unit of 2 dBm */
+#define PD_LOWER_BOUND_BASE 102
+	s8 cck_pd_idx;
+	u8 rsvd0;
+	u8 rsvd1;
+	u8 rsvd2;
+} __packed;
+
 /* For WiFi 6 chips:
  *   VHT, HE, HT-old: [6:4]: NSS, [3:0]: MCS
  *   HT-new: [6:5]: NA, [4:0]: MCS
diff --git a/drivers/net/wireless/realtek/rtw89/phy.c b/drivers/net/wireless/realtek/rtw89/phy.c
index 270f40e44c0b..e358cb83dae8 100644
--- a/drivers/net/wireless/realtek/rtw89/phy.c
+++ b/drivers/net/wireless/realtek/rtw89/phy.c
@@ -3023,6 +3023,35 @@ void (* const rtw89_phy_c2h_ra_handler[])(struct rtw89_dev *rtwdev,
 	[RTW89_PHY_C2H_FUNC_TXSTS] = NULL,
 };
 
+static void
+rtw89_phy_c2h_lowrt_rty(struct rtw89_dev *rtwdev, struct sk_buff *c2h, u32 len)
+{
+}
+
+static void
+rtw89_phy_c2h_fw_scan_rpt(struct rtw89_dev *rtwdev, struct sk_buff *c2h, u32 len)
+{
+	const struct rtw89_c2h_fw_scan_rpt *c2h_rpt =
+		(const struct rtw89_c2h_fw_scan_rpt *)c2h->data;
+
+	rtw89_debug(rtwdev, RTW89_DBG_DIG,
+		    "%s: band: %u, op_chan: %u, PD_low_bd(ofdm, cck): (-%d, %d), phy_idx: %u\n",
+		    __func__, c2h_rpt->band, c2h_rpt->center_ch,
+		    PD_LOWER_BOUND_BASE - (c2h_rpt->ofdm_pd_idx << 1),
+		    c2h_rpt->cck_pd_idx, c2h_rpt->phy_idx);
+}
+
+static
+void (* const rtw89_phy_c2h_dm_handler[])(struct rtw89_dev *rtwdev,
+					  struct sk_buff *c2h, u32 len) = {
+	[RTW89_PHY_C2H_DM_FUNC_FW_TEST] = NULL,
+	[RTW89_PHY_C2H_DM_FUNC_FW_TRIG_TX_RPT] = NULL,
+	[RTW89_PHY_C2H_DM_FUNC_SIGB] = NULL,
+	[RTW89_PHY_C2H_DM_FUNC_LOWRT_RTY] = rtw89_phy_c2h_lowrt_rty,
+	[RTW89_PHY_C2H_DM_FUNC_MCC_DIG] = NULL,
+	[RTW89_PHY_C2H_DM_FUNC_FW_SCAN] = rtw89_phy_c2h_fw_scan_rpt,
+};
+
 static void rtw89_phy_c2h_rfk_rpt_log(struct rtw89_dev *rtwdev,
 				      enum rtw89_phy_c2h_rfk_log_func func,
 				      void *content, u16 len)
@@ -3558,9 +3587,9 @@ void rtw89_phy_c2h_handle(struct rtw89_dev *rtwdev, struct sk_buff *skb,
 			handler = rtw89_phy_c2h_rfk_report_handler[func];
 		break;
 	case RTW89_PHY_C2H_CLASS_DM:
-		if (func == RTW89_PHY_C2H_DM_FUNC_LOWRT_RTY)
-			return;
-		fallthrough;
+		if (func < ARRAY_SIZE(rtw89_phy_c2h_dm_handler))
+			handler = rtw89_phy_c2h_dm_handler[func];
+		break;
 	default:
 		rtw89_info(rtwdev, "PHY c2h class %d not support\n", class);
 		return;
diff --git a/drivers/net/wireless/realtek/rtw89/phy.h b/drivers/net/wireless/realtek/rtw89/phy.h
index cafb1a06d7b8..5b451f1cfaac 100644
--- a/drivers/net/wireless/realtek/rtw89/phy.h
+++ b/drivers/net/wireless/realtek/rtw89/phy.h
@@ -164,6 +164,7 @@ enum rtw89_phy_c2h_dm_func {
 	RTW89_PHY_C2H_DM_FUNC_SIGB,
 	RTW89_PHY_C2H_DM_FUNC_LOWRT_RTY,
 	RTW89_PHY_C2H_DM_FUNC_MCC_DIG,
+	RTW89_PHY_C2H_DM_FUNC_FW_SCAN = 0xc,
 	RTW89_PHY_C2H_DM_FUNC_NUM,
 };
 
-- 
2.25.1