disp: msm: dsi: sync the command DMA packet buffer after update

Sync the command DMA packet buffer after update.

Change-Id: I01b91400bb15ab75cbb7ce3cf9adc4b64f7e923d
Signed-off-by: Anand Tarakh <quic_atarakh@quicinc.com>

msm/dsi/dsi_ctrl.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2021-2023, Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2024, Qualcomm Innovation Center, Inc. All rights reserved.
  * Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
  */
 
@@ -1568,11 +1568,11 @@ static int dsi_message_tx(struct dsi_ctrl *dsi_ctrl, struct dsi_cmd_desc *cmd_de
 
 		cmdbuf = (u8 *)(dsi_ctrl->vaddr);
 
-		msm_gem_sync(dsi_ctrl->tx_cmd_buf);
 		for (cnt = 0; cnt < length; cnt++)
 			cmdbuf[dsi_ctrl->cmd_len + cnt] = buffer[cnt];
 
 		dsi_ctrl->cmd_len += length;
+		msm_gem_sync(dsi_ctrl->tx_cmd_buf);
 
 		if (*flags & DSI_CTRL_CMD_LAST_COMMAND) {
 			cmd_mem.length = dsi_ctrl->cmd_len;