disp: msm: dp: retry the request to set USB mode during bootup

DP driver is requesting USB to release SS lanes very early
during bootup even before USB has fully initialized. As a
result USB driver is returning -11 which will abort DP state
machine. This change will allow DP driver to retry USB request
whenever this error code is received.

Change-Id: I144d16ef4b07016569ba9c04df15610fe3b5e6fc
Signed-off-by: Sandeep Gangadharaiah <sandgang@codeaurora.org>

msm/dp/dp_altmode.c

@@ -43,7 +43,7 @@ enum dp_altmode_pin_assignment {
 
 static int dp_altmode_set_usb_dp_mode(struct dp_altmode_private *altmode)
 {
-	int rc;
+	int rc = 0;
 	struct device_node *np;
 	struct device_node *usb_node;
 	struct platform_device *usb_pdev;
@@ -71,7 +71,7 @@ static int dp_altmode_set_usb_dp_mode(struct dp_altmode_private *altmode)
 
 	while (timeout) {
 		rc = dwc3_msm_set_dp_mode(&usb_pdev->dev, altmode->connected, altmode->lanes);
-		if (rc != -EBUSY)
+		if (rc != -EBUSY && rc != -EAGAIN)
 			break;
 
 		DP_WARN("USB busy, retry\n");