It is my understanding that Linux has an issue with 5.1. That is why we get these devices in 4.1 mode. I suspect the lack of experience on this issue from the Green Team caused this to happen. It should have triggered a revsion change at the least.
However, some of the new controllers inside the eMMC will not support 4.1 in the future. So sooner of later, something may need to happen. I have no idea what the exact issue is. Gerald On Wed, Jun 15, 2016 at 1:46 PM, Robert Nelson <robertcnel...@gmail.com> wrote: > On Wed, Jun 15, 2016 at 1:36 PM, William Hermans <yyrk...@gmail.com> > wrote: > > hah ! I did not even look at the second patch. And it does exactly what I > > was thinking. Remove that whole check . . .heh > > > > So now I'm curious why that code was there in the first place ? Someone > > flexing their eWenus, just to break the code when a newer version of > > hardware is used ? > > Looks like it was a spec change: > > From: JESD84-B50: > > B.8. Changes from version 4.51 to 5.0 > > Edit to support Ver.5.0 in EXT_CSD_REV[192] > o Note: A host system should work properly considering future eMMC > version. For > example, a host system is expected not to exit only due to the > EXT_CSD_REV[192] > value greater than 7 which will be used for next e•MMC revision.” > > So my guess, in 4.51 or earlier, something said to exit in that situation. > > > Regards, > > -- > Robert Nelson > https://rcn-ee.com/ > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/CAOCHtYj6_-cpYv%2BKq%3DCk-j7j8C5ER0S62josK6GmBC9kirwkTw%40mail.gmail.com > . > For more options, visit https://groups.google.com/d/optout. > -- Gerald ger...@beagleboard.org http://beagleboard.org/ gcol...@emprodesign.com -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAHK_S%2Bf3FaBh1smpNFrqsuAowg21_cjd6XU0qBdoOBjpso7qYw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
