wifi: ath12k: support default regdb while searching board-2.bin for WCN7850

Sometimes board-2.bin does not have the regdb data which matches the
parameters such as vendor, device, subsystem-vendor, subsystem-device
etc. Add default regdb data with only 'bus=%s' into board-2.bin for
WCN7850, then ath12k uses 'bus=pci' to search regdb data in board-2.bin
for WCN7850.

[   46.114895] ath12k_pci 0000:03:00.0: boot using board name 'bus=pci,vendor=17cb,device=1107,subsystem-vendor=17cb,subsystem-device=3378,qmi-chip-id=2,qmi-board-id=260'
[   46.118167] ath12k_pci 0000:03:00.0: boot firmware request ath12k/WCN7850/hw2.0/board-2.bin size 380280
[   46.118173] ath12k_pci 0000:03:00.0: board name
[   46.118176] ath12k_pci 0000:03:00.0: 00000000: 62 75 73 3d 70 63 69                             bus=pci
[   46.118179] ath12k_pci 0000:03:00.0: failed to fetch regdb data for bus=pci,vendor=17cb,device=1107,subsystem-vendor=17cb,subsystem-device=3378,qmi-chip-id=2,qmi-board-id=260 from ath12k/WCN7850/hw2.0/board-2.bin
[   46.118239] ath12k_pci 0000:03:00.0: boot using board name 'bus=pci'
[   46.119842] ath12k_pci 0000:03:00.0: boot firmware request ath12k/WCN7850/hw2.0/board-2.bin size 380280
[   46.119847] ath12k_pci 0000:03:00.0: board name
[   46.119849] ath12k_pci 0000:03:00.0: 00000000: 62 75 73 3d 70 63 69                             bus=pci
[   46.119852] ath12k_pci 0000:03:00.0: boot found match regdb data for name 'bus=pci'
[   46.119855] ath12k_pci 0000:03:00.0: boot found regdb data for 'bus=pci'
[   46.119857] ath12k_pci 0000:03:00.0: fetched regdb

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4
Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20231216060140.30611-6-quic_bqiang@quicinc.com

drivers/net/wireless/ath/ath12k/core.c

@@ -105,7 +105,8 @@ int ath12k_core_resume(struct ath12k_base *ab)
 }
 
 static int __ath12k_core_create_board_name(struct ath12k_base *ab, char *name,
-					   size_t name_len, bool with_variant)
+					   size_t name_len, bool with_variant,
+					   bool bus_type_mode)
 {
 	/* strlen(',variant=') + strlen(ab->qmi.target.bdf_ext) */
 	char variant[9 + ATH12K_QMI_BDF_EXT_STR_LENGTH] = { 0 };
@@ -116,15 +117,20 @@ static int __ath12k_core_create_board_name(struct ath12k_base *ab, char *name,
 
 	switch (ab->id.bdf_search) {
 	case ATH12K_BDF_SEARCH_BUS_AND_BOARD:
-		scnprintf(name, name_len,
-			  "bus=%s,vendor=%04x,device=%04x,subsystem-vendor=%04x,subsystem-device=%04x,qmi-chip-id=%d,qmi-board-id=%d%s",
-			  ath12k_bus_str(ab->hif.bus),
-			  ab->id.vendor, ab->id.device,
-			  ab->id.subsystem_vendor,
-			  ab->id.subsystem_device,
-			  ab->qmi.target.chip_id,
-			  ab->qmi.target.board_id,
-			  variant);
+		if (bus_type_mode)
+			scnprintf(name, name_len,
+				  "bus=%s",
+				  ath12k_bus_str(ab->hif.bus));
+		else
+			scnprintf(name, name_len,
+				  "bus=%s,vendor=%04x,device=%04x,subsystem-vendor=%04x,subsystem-device=%04x,qmi-chip-id=%d,qmi-board-id=%d%s",
+				  ath12k_bus_str(ab->hif.bus),
+				  ab->id.vendor, ab->id.device,
+				  ab->id.subsystem_vendor,
+				  ab->id.subsystem_device,
+				  ab->qmi.target.chip_id,
+				  ab->qmi.target.board_id,
+				  variant);
 		break;
 	default:
 		scnprintf(name, name_len,
@@ -143,13 +149,19 @@ static int __ath12k_core_create_board_name(struct ath12k_base *ab, char *name,
 static int ath12k_core_create_board_name(struct ath12k_base *ab, char *name,
 					 size_t name_len)
 {
-	return __ath12k_core_create_board_name(ab, name, name_len, true);
+	return __ath12k_core_create_board_name(ab, name, name_len, true, false);
 }
 
 static int ath12k_core_create_fallback_board_name(struct ath12k_base *ab, char *name,
 						  size_t name_len)
 {
-	return __ath12k_core_create_board_name(ab, name, name_len, false);
+	return __ath12k_core_create_board_name(ab, name, name_len, false, false);
+}
+
+static int ath12k_core_create_bus_type_board_name(struct ath12k_base *ab, char *name,
+						  size_t name_len)
+{
+	return __ath12k_core_create_board_name(ab, name, name_len, false, true);
 }
 
 const struct firmware *ath12k_core_firmware_request(struct ath12k_base *ab,
@@ -453,7 +465,7 @@ int ath12k_core_fetch_bdf(struct ath12k_base *ab, struct ath12k_board_data *bd)
 
 int ath12k_core_fetch_regdb(struct ath12k_base *ab, struct ath12k_board_data *bd)
 {
-	char boardname[BOARD_NAME_SIZE];
+	char boardname[BOARD_NAME_SIZE], default_boardname[BOARD_NAME_SIZE];
 	int ret;
 
 	ret = ath12k_core_create_board_name(ab, boardname, BOARD_NAME_SIZE);
@@ -470,6 +482,21 @@ int ath12k_core_fetch_regdb(struct ath12k_base *ab, struct ath12k_board_data *bd
 	if (!ret)
 		goto exit;
 
+	ret = ath12k_core_create_bus_type_board_name(ab, default_boardname,
+						     BOARD_NAME_SIZE);
+	if (ret) {
+		ath12k_dbg(ab, ATH12K_DBG_BOOT,
+			   "failed to create default board name for regdb: %d", ret);
+		goto exit;
+	}
+
+	ret = ath12k_core_fetch_board_data_api_n(ab, bd, default_boardname,
+						 ATH12K_BD_IE_REGDB,
+						 ATH12K_BD_IE_REGDB_NAME,
+						 ATH12K_BD_IE_REGDB_DATA);
+	if (!ret)
+		goto exit;
+
 	ret = ath12k_core_fetch_board_data_api_1(ab, bd, ATH12K_REGDB_FILE_NAME);
 	if (ret)
 		ath12k_dbg(ab, ATH12K_DBG_BOOT, "failed to fetch %s from %s\n",