diff --git a/android/hal-ipc-api.txt b/android/hal-ipc-api.txt
index 01c2e81..ae58fda 100644
--- a/android/hal-ipc-api.txt
+++ b/android/hal-ipc-api.txt
0x04 = Rev seek
0xff = Error
- Opcode 0x02 - List Player Application Attributes command/response
+ Opcode 0x02 - List Player Attributes Response command/response
+
+ Command parameters: Number of attributes (1 octet)
+ Attribute # (1 octet)
+ ...
+
+ In case of an error, the error response will be returned.
+
+ Valid attributes: 0x01 = Equalizer
+ 0x02 = Repead
+ 0x03 = Shuffle
+ 0x04 = Scan
+
Opcode 0x03 - List Player Application Values command/response
Opcode 0x04 - Get Player Application Values command/response
Opcode 0x05 - Get Player Application Attributes Text command/response
diff --git a/android/hal-msg.h b/android/hal-msg.h
index 82cd3f5..4a438d1 100644
--- a/android/hal-msg.h
+++ b/android/hal-msg.h
uint32_t duration;
uint32_t position;
} __attribute__((packed));
+
+#define HAL_AVRCP_PLAYER_ATTR_EQUALIZER 0x01
+#define HAL_AVRCP_PLAYER_ATTR_REPEAT 0x02
+#define HAL_AVRCP_PLAYER_ATTR_SHUFFLE 0x03
+#define HAL_AVRCP_PLAYER_ATTR_SCAN 0x04
+
+#define HAL_OP_AVRCP_LIST_PLAYER_ATTRS 0x02
+struct hal_cmd_avrcp_list_player_attrs {
+ uint8_t number;
+ uint8_t attrs[0];
+} __attribute__((packed));