Hi Teresa On 01/11/2017 07:57 AM, Teresa Remmet wrote:
The phy we use is a KSZ9021. And yes we add delays to the phy, as you can see. When looking to the dts documentation I probably need to set the phy-mode to "rgmii-id" instead, as the phy is providing the delays.
Before the change I submitted, every "rgmii*" link was being set up as "rgmii-id", regardless of phy-mode. I suspected there might have been the odd board here or there that used "rgmii" when the actual mode is "rgmii-id".
What confused me the first time around was that I didn't realize the delay applies to the phy, not the mac. So "-id" means "the PHY provides the delays, so don't add delays on the MAC", just like you realized.
I make a quick test with that change and it is working. So this seems to solve my problem. Thank you for the hint.
I'm glad it was an easy fix. Last time I had issues with RGMII, I had to pull out the oscilloscope.
Alex
Regards, Teresa
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