quoted

quoted

@@ -2015,14 +2016,23 @@ static int m88e1510_loopback(struct

phy_device *phydev, bool enable)

quoted

 		if (err < 0)
 			return err;

-		/* FIXME: Based on trial and error test, it seem 1G need to

have

quoted

-		 * delay between soft reset and loopback enablement.
-		 */
-		if (phydev->speed == SPEED_1000)
-			msleep(1000);
+		if (phydev->speed == SPEED_1000) {
+			err = phy_read_poll_timeout(phydev, MII_BMSR,

val, val & BMSR_LSTATUS,

quoted

+						    PHY_LOOP_BACK_SLEEP,
+

PHY_LOOP_BACK_TIMEOUT, true);

Is this link with itself?

 
Its required cabled plug in, back to back connection.

Loopback should not require that. The whole point of loopback in the
PHY is you can do it without needing a cable.

quoted

Have you tested this with the cable unplugged?

Yes we have and its expected to have the timeout. But the self-test required the link
to be up first before it can be run.

So you get an ETIMEDOUT, and then skip the code which actually sets
the LOOPBACK bit?

Please look at this again, and make it work without a cable.

Maybe you are addressing the wrong issue? Is the PHY actually
performing loopback, but reporting the link is down? Maybe you need to
fake a link up? Maybe you need the self test to not care about the
link state, all it really needs is that packets get looped?

       Andrew