On Thu, Jan 04, 2018 at 07:19:15AM +0000, Bard Liao wrote:

I found mt8173 from mediatek is using rt5650 micbias. {"Headset Mic", NULL, "micbias1"}, {"Headset Mic", NULL, "micbias2"}, I think we should remove it but still need to verify. We are co-working with MTK folks on it and it may take some days.

That looks like normal supply usage for a micbias so most likely your patch is a fix for them anyway.