diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
index d732b6f031a1..a7e0001a8f46 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1270,16 +1270,6 @@ void dcn20_pipe_control_lock(
 					lock,
 					&hw_locks,
 					&inst_flags);
-	} else if (pipe->stream && pipe->stream->mall_stream_config.type == SUBVP_MAIN) {
-		union dmub_inbox0_cmd_lock_hw hw_lock_cmd = { 0 };
-		hw_lock_cmd.bits.command_code = DMUB_INBOX0_CMD__HW_LOCK;
-		hw_lock_cmd.bits.hw_lock_client = HW_LOCK_CLIENT_DRIVER;
-		hw_lock_cmd.bits.lock_pipe = 1;
-		hw_lock_cmd.bits.otg_inst = pipe->stream_res.tg->inst;
-		hw_lock_cmd.bits.lock = lock;
-		if (!lock)
-			hw_lock_cmd.bits.should_release = 1;
-		dmub_hw_lock_mgr_inbox0_cmd(dc->ctx->dmub_srv, hw_lock_cmd);
 	} else if (pipe->plane_state != NULL && pipe->plane_state->triplebuffer_flips) {
 		if (lock)
 			pipe->stream_res.tg->funcs->triplebuffer_lock(pipe->stream_res.tg);
@@ -1856,7 +1846,7 @@ void dcn20_post_unlock_program_front_end(
 
 			for (j = 0; j < TIMEOUT_FOR_PIPE_ENABLE_MS*1000
 					&& hubp->funcs->hubp_is_flip_pending(hubp); j++)
-				mdelay(1);
+				udelay(1);
 		}
 	}