diff --git a/fw/wmi_tlv_defs.h b/fw/wmi_tlv_defs.h
index 01dd3f44924f..28ad988b8ff2 100644
--- a/fw/wmi_tlv_defs.h
+++ b/fw/wmi_tlv_defs.h
@@ -1431,6 +1431,7 @@ typedef enum {
     WMITLV_TAG_STRUC_wmi_pdev_enable_xlna_cmd_fixed_param,
     WMITLV_TAG_STRUC_wmi_pdev_enable_xlna_event_fixed_param,
     WMITLV_TAG_STRUC_wmi_reg_chan_list_cc_event_ext2_fixed_param,
+    WMITLV_TAG_STRUC_wmi_pdev_set_custom_tx_power_per_mcs_cmd_fixed_param,
 } WMITLV_TAG_ID;
 /*
  * IMPORTANT: Please add _ALL_ WMI Commands Here.
@@ -1976,6 +1977,7 @@ typedef enum {
     OP(WMI_VDEV_GET_TWT_SESSION_STATS_INFO_CMDID) \
     OP(WMI_PDEV_ENABLE_WIFI_RADAR_CMDID) \
     OP(WMI_PDEV_ENABLE_XLNA_CMDID) \
+    OP(WMI_PDEV_SET_CUSTOM_TX_POWER_PER_MCS_CMDID) \
     /* add new CMD_LIST elements above this line */
 
 
@@ -5583,6 +5585,12 @@ WMITLV_CREATE_PARAM_STRUC(WMI_PDEV_ENABLE_WIFI_RADAR_CMDID);
     WMITLV_ELEM(id,op,buf,len, WMITLV_TAG_STRUC_wmi_pdev_enable_xlna_cmd_fixed_param, wmi_pdev_enable_xlna_cmd_fixed_param, fixed_param, WMITLV_SIZE_FIX)
 WMITLV_CREATE_PARAM_STRUC(WMI_PDEV_ENABLE_XLNA_CMDID);
 
+/* WMI cmd to set custom TX power backoff value per band/chain/mcs to PHY */
+#define WMITLV_TABLE_WMI_PDEV_SET_CUSTOM_TX_POWER_PER_MCS_CMDID(id,op,buf,len) \
+    WMITLV_ELEM(id,op,buf,len, WMITLV_TAG_STRUC_wmi_pdev_set_custom_tx_power_per_mcs_cmd_fixed_param, wmi_pdev_set_custom_tx_power_per_mcs_cmd_fixed_param, fixed_param, WMITLV_SIZE_FIX) \
+    WMITLV_ELEM(id,op,buf,len, WMITLV_TAG_ARRAY_BYTE, A_UINT8, txpower_bkoff_array, WMITLV_SIZE_VAR)
+WMITLV_CREATE_PARAM_STRUC(WMI_PDEV_SET_CUSTOM_TX_POWER_PER_MCS_CMDID);
+
 
 
 /************************** TLV definitions of WMI events *******************************/
diff --git a/fw/wmi_unified.h b/fw/wmi_unified.h
index 709828eb7b86..bc44524413b0 100644
--- a/fw/wmi_unified.h
+++ b/fw/wmi_unified.h
@@ -563,6 +563,10 @@ typedef enum {
     WMI_PDEV_ENABLE_WIFI_RADAR_CMDID,
     /* WMI Command to enable xLNA */
     WMI_PDEV_ENABLE_XLNA_CMDID,
+    /**
+     * WMI cmd to set custom TX power backoff value per band/chain/MCS to PHY.
+     */
+    WMI_PDEV_SET_CUSTOM_TX_POWER_PER_MCS_CMDID,
 
 
     /* VDEV (virtual device) specific commands */
@@ -37446,6 +37450,7 @@ static INLINE A_UINT8 *wmi_id_to_name(A_UINT32 wmi_command)
         WMI_RETURN_STRING(WMI_PDEV_ENABLE_WIFI_RADAR_CMDID);
         WMI_RETURN_STRING(WMI_VDEV_GET_TWT_SESSION_STATS_INFO_CMDID);
         WMI_RETURN_STRING(WMI_PDEV_ENABLE_XLNA_CMDID);
+        WMI_RETURN_STRING(WMI_PDEV_SET_CUSTOM_TX_POWER_PER_MCS_CMDID);
     }
 
     return (A_UINT8 *) "Invalid WMI cmd";
@@ -46930,6 +46935,91 @@ typedef struct {
     A_UINT32 pdev_id; /* to identify for which pdev the response is received */
 } wmi_pdev_set_tgtr2p_table_event_fixed_param;
 
+
+#define WMI_PDEV_SET_CUSTOM_TX_PWR_MAX_CHAIN_NUM         4
+
+#define WMI_PDEV_SET_CUSTOM_TX_PWR_MAX_2G_RATE_NUM       18
+
+#define WMI_PDEV_SET_CUSTOM_TX_PWR_MAX_5G_6G_RATE_NUM    24
+
+typedef struct {
+    A_UINT32 tlv_header; /* TLV tag and len; tag equals WMITLV_TAG_STRUC_wmi_pdev_set_custom_tx_power_per_mcs_cmd_fixed_param */
+    A_UINT32 pdev_id;
+
+    /* Every band's bitmap is per chain per mcs, the bit set indicate the txpower value existed
+     * in txpower_array, otherwise, it means no setting from up-layer and need treat the setting
+     * txpower as zero
+     */
+
+    /* currently 2GHz band has 2 chains (though space is allocated for up
+     * to 4 chains) and each chain has 18 rates.
+     * bitmap_of_2GHz_band[0] -> chain 0 bitmap:
+     * |bit  0|bit  1|......|bit  17|
+     * |rate 0|rate 1|......|rate 17|
+     *
+     * bitmap_of_2GHz_band[1] -> chain 1 bitmap:
+     * |bit  0|bit  1|......|bit  17|
+     * |rate 0|rate 1|......|rate 17|
+     *
+     * bitmap_of_2GHz_band[2] -> reserved
+     * bitmap_of_2GHz_band[3] -> reserved
+     */
+    A_UINT32 bitmap_of_2GHz_band[WMI_PDEV_SET_CUSTOM_TX_PWR_MAX_CHAIN_NUM];
+
+    /* 5GHz band has 4 chains and each chain has 24 rates.
+     * bitmap_of_5GHz_band[0] -> chain 0 bitmap:
+     * |bit  0|bit  1|......|bit  23|
+     * |rate 0|rate 1|......|rate 23|
+     *
+     * bitmap_of_5GHz_band[1] -> chain 1 bitmap:
+     * |bit  0|bit  1|......|bit  23|
+     * |rate 0|rate 1|......|rate 23|
+     *
+     * bitmap_of_5GHz_band[2] -> chain 2 bitmap:
+     * |bit  0|bit  1|......|bit  23|
+     * |rate 0|rate 1|......|rate 23|
+     *
+     * bitmap_of_5GHz_band[3] -> chain 3 bitmap:
+     * |bit  0|bit  1|......|bit  23|
+     * |rate 0|rate 1|......|rate 23|
+     */
+    A_UINT32 bitmap_of_5GHz_band[WMI_PDEV_SET_CUSTOM_TX_PWR_MAX_CHAIN_NUM];
+
+    /* 6GHz band has 4 chains and each chain has 24 rates.
+     * bitmap_of_6GHz_band[0] -> chain 0 bitmap:
+     * |bit  0|bit  1|......|bit  23|
+     * |rate 0|rate 1|......|rate 23|
+     *
+     * bitmap_of_6GHz_band[1] -> chain 1 bitmap:
+     * |bit  0|bit  1|......|bit  23|
+     * |rate 0|rate 1|......|rate 23|
+     *
+     * bitmap_of_6GHz_band[2] -> chain 2 bitmap:
+     * |bit  0|bit  1|......|bit  23|
+     * |rate 0|rate 1|......|rate 23|
+     *
+     * bitmap_of_6GHz_band[3] -> chain 3 bitmap:
+     * |bit  0|bit  1|......|bit  23|
+     * |rate 0|rate 1|......|rate 23|
+     */
+    A_UINT32 bitmap_of_6GHz_band[WMI_PDEV_SET_CUSTOM_TX_PWR_MAX_CHAIN_NUM];
+
+    A_UINT32 txpower_array_len;
+
+/* This TLV is followed by array of bytes:
+ * A_UINT8 txpower_bkoff_array[]:
+ *     The txpower backoff value for each bit set within the per-band bitmaps
+ *     above, in dB units.
+ *     The elements from the 2GHz band occur first, then the elements from the
+ *     5GHz band, then the elements from the 6GHz band.
+ *     Within each band, the elements from the lower chain numbers (i.e. the
+ *     lower words within the bitmap array) occur first.
+ *     Within each chain of each band, the element from the lower rate indices
+ *     (i.e. the least significant bits within the bitmap word) occur first.
+ */
+} wmi_pdev_set_custom_tx_power_per_mcs_cmd_fixed_param;
+
+
 typedef struct {
     A_UINT32 tlv_header;      /* TLV tag and len; tag equals WMITLV_TAG_STRUC_wmi_mlo_vdev_get_link_info_cmd_fixed_param */
     A_UINT32 vdev_id;
diff --git a/fw/wmi_version.h b/fw/wmi_version.h
index 0d77f3c694c7..cf487ddb4fb9 100644
--- a/fw/wmi_version.h
+++ b/fw/wmi_version.h
@@ -37,7 +37,7 @@
 #define __WMI_VER_MINOR_    0
 /** WMI revision number has to be incremented when there is a
  *  change that may or may not break compatibility. */
-#define __WMI_REVISION_ 1450
+#define __WMI_REVISION_ 1451
 
 /** The Version Namespace should not be normally changed. Only
  *  host and firmware of the same WMI namespace will work