Hi, > > The intention for this revert is that the it's too engineering > > solution for a special board but force all platforms to wait > > for that long time, especially painful for mmc_power_up for eMMC > > when booting. Careful! It was *introduced* for one specific board. But we can't tell if other platforms benefit from this since 2009(!). > > In practise, the modern hardware should have a stable power supply While I agree, sill notice the "should". Reality is often enough different. > > It has been long time proved 2ms is enough when testing variety of Where is that proof? If we have such a proof, things would be easy, but I really have strong doubts. We have indications, at best, I'd say. > This is true if there is an external regulator, but sometimes we use > host specific ways to power the card. This is also true and to be considered. > > > > Just revert it now and see if it could smokes out something interesting. Hell, no! "Let's change it to my needs and if it breaks for other people, they can complain"? That's not how Linux development works, we should try as hard as possible to not introduce regressions. > An option is to use an opt-out method, perhaps via a new host cap? Opt-in for the shortened delay, I'd suggest. Platforms which know they need less delay can set it. White listing. NAK for the original patch. Regards, Wolfram
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