[...] >>> >From my first impression I agree, as that is the policy we have been >>>>sticking to when writing to persistent EXT_CSD registers. >>>>Although, in this case, I am actually wondering on what is the best approach. >>>> >>>>Is there really ever a case when we don't want auto BKOPS to be default enabled? >>>>I think BKOPS is a fundamental feature of an FTL and I can't see a >>>>reason to why we need to involve mmc-utils/userspace to enable it. Am >>>>I wrong? >>> >>> The even worst case is ? involve mmc-utils/userspace to DISABLE it. >>> I think this register need to be set by vendor and no need to be changed on runtime. >> >>If it is set by the Vendor, that's of course the best. > > It can be set by Storage Vendor. > According to the spec, the default value of this bit is vendor specific. > >> >>Are you saying that we shouldn't enable it during the card init >>sequence from the kernel, in case it is disabled? > > No. > By the spec ? a Host that wants to enable the device to perform > background operations during device idle time, should signal the > device by setting AUTO_EN in BKOPS_EN field [EXT_CSD byte 163] to 1b. Okay, thanks! Kind regards Uffe
