drm/amd/display: Implement INBOX0 usage in driver

[Why]
Start using INBOX0 for HW Lock command

[How]
- Implement initial interface for INBOX0 HW lock message
Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c

@@ -110,6 +110,15 @@ void dc_dmub_srv_wait_idle(struct dc_dmub_srv *dc_dmub_srv)
 		DC_ERROR("Error waiting for DMUB idle: status=%d\n", status);
 }
 
+void dc_dmub_srv_send_inbox0_cmd(struct dc_dmub_srv *dmub_srv,
+		union dmub_inbox0_data_register data)
+{
+	struct dmub_srv *dmub = dmub_srv->dmub;
+	if (dmub->hw_funcs.send_inbox0_cmd)
+		dmub->hw_funcs.send_inbox0_cmd(dmub, data);
+	// TODO: Add wait command -- poll register for ACK
+}
+
 bool dc_dmub_srv_cmd_with_reply_data(struct dc_dmub_srv *dc_dmub_srv, union dmub_rb_cmd *cmd)
 {
 	struct dmub_srv *dmub;

drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h

@@ -66,4 +66,6 @@ bool dc_dmub_srv_get_dmub_outbox0_msg(const struct dc *dc, struct dmcub_trace_bu
 
 void dc_dmub_trace_event_control(struct dc *dc, bool enable);
 
+void dc_dmub_srv_send_inbox0_cmd(struct dc_dmub_srv *dmub_srv, union dmub_inbox0_data_register data);
+
 #endif /* _DMUB_DC_SRV_H_ */

drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c

@@ -52,6 +52,14 @@ void dmub_hw_lock_mgr_cmd(struct dc_dmub_srv *dmub_srv,
 	dc_dmub_srv_wait_idle(dmub_srv);
 }
 
+void dmub_hw_lock_mgr_inbox0_cmd(struct dc_dmub_srv *dmub_srv,
+		union dmub_inbox0_cmd_lock_hw hw_lock_cmd)
+{
+	union dmub_inbox0_data_register data = { 0 };
+	data.inbox0_cmd_lock_hw = hw_lock_cmd;
+	dc_dmub_srv_send_inbox0_cmd(dmub_srv, data);
+}
+
 bool should_use_dmub_lock(struct dc_link *link)
 {
 	return false;

drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.h

@@ -34,6 +34,9 @@ void dmub_hw_lock_mgr_cmd(struct dc_dmub_srv *dmub_srv,
 				union dmub_hw_lock_flags *hw_locks,
 				struct dmub_hw_lock_inst_flags *inst_flags);
 
+void dmub_hw_lock_mgr_inbox0_cmd(struct dc_dmub_srv *dmub_srv,
+		union dmub_inbox0_cmd_lock_hw hw_lock_cmd);
+
 bool should_use_dmub_lock(struct dc_link *link);
 
 #endif /*_DMUB_HW_LOCK_MGR_H_ */

drivers/gpu/drm/amd/display/dmub/dmub_srv.h

@@ -324,6 +324,7 @@ struct dmub_srv_hw_funcs {
 
 	uint32_t (*get_gpint_response)(struct dmub_srv *dmub);
 
+	void (*send_inbox0_cmd)(struct dmub_srv *dmub, union dmub_inbox0_data_register data);
 	uint32_t (*get_current_time)(struct dmub_srv *dmub);
 };