Re: [PATCH net-next v1] net: phy: tja11xx: add cable-test support

On Wed, May 13, 2020 at 08:01:40PM +0200, Andrew Lunn wrote:

quoted

What would be the best place to do a test before the link is getting up?
Can it be done in the phy core, or it should be done in the PHY driver?

So far, no action except of logging these errors is needed. 

You could do it in the config_aneg callback.

In this case I get two test cycles if the test was requested from user
space: from .cable_test_get_status and from .config_aneg

A kernel log entry is not very easy to use. You might want to see how
easy it is to send a cable test result to userspace. Anything which is
interested in this information can then listen for it. All the needed
code is there, you will just need to rearrange it a bit.

Indeed. I discovered" ethtool --monitor" for me. And the code is some
thing like this:
	ethnl_cable_test_alloc(phydev);
	phydev->drv->cable_test_start(phydev);
	usleep_range(100, 200);
	phydev->drv->cable_test_get_status(phydev, &finished);
	if (finished)
		ethnl_cable_test_finished(phydev);


Beside, what do you think about new result codes:
  ETHTOOL_A_CABLE_RESULT_CODE_POLARITY - if cable polarity is wrong (-
  connected to +)
  ETHTOOL_A_CABLE_RESULT_CODE_ACTIVE_PARTNER - the link partner is active.
     The TJA1102 is able to detect it if partner link is master.

Regards,
Oleksij

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