Re: [PATCH] ARM: dts: imx6qdl-sabresd: change phy-mode to use rgmii-id

Am Donnerstag, den 21.03.2019, 08:17 -0300 schrieb Fabio Estevam:

Hi Abel,

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On Thu, Mar 21, 2019 at 5:42 AM Abel Vesa [off-list ref] wrote:

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It seems we have other boards that need to be fixed and we can not
have an old dtb with functional Ethernet with a new kernel.

Does anyone know if this issue is AR8031 specific?

I can confirm the same fix is works on imx6sx too.

imx6sx-sabresd also uses an AR8031 Ethernet PHY.

I also tested that changing the phy-mode to "rgmii-id" fixes Ethernet
on pico-imx7d with AR8035.

So yes, we currently have lots of broken dtb's in mainline and I am
wondering what is the proper fix here.

Fix the DT. It's unfortunate the a kernel and DT bug canceled each
other out, but if the DT is clearly broken and fixing it in a backward
compatible way is not really feasible, I would argue that we should
treat a DT bug like any other bug.

Regards,
Lucas