disp: msm: dsi: make panel commands async for vid to cmd switch

Optimize pre mode switch panel command by transferring async. This
removes the time waited until subsequent dma_done irq.

Change-Id: I2e2516fdd641e85d1f1b221a6ea7999c868edf00
Signed-off-by: Nilaan Gunabalachandran <ngunabal@codeaurora.org>
Signed-off-by: Satya Rama Aditya Pinapala <psraditya30@codeaurora.org>

msm/dsi/dsi_panel.c

@@ -411,6 +411,9 @@ static int dsi_panel_tx_cmd_set(struct dsi_panel *panel,
 		if (cmds->last_command)
 			cmds->msg.flags |= MIPI_DSI_MSG_LASTCOMMAND;
 
+		if (type == DSI_CMD_SET_VID_TO_CMD_SWITCH)
+			cmds->msg.flags |= MIPI_DSI_MSG_ASYNC_OVERRIDE;
+
 		len = ops->transfer(panel->host, &cmds->msg);
 		if (len < 0) {
 			rc = len;