On Fri, Oct 07, 2016 at 01:44:13AM +0200, Jean-Christian de Rivaz wrote: > Did you realize that SD card and eMMC uses both exactly the same signaling > and controller on all processors, not only on the Allwinner family ? If a > board designer is stupid enough to connect the eMMC instead of the SD card > on the controller looked first by the on chip ROM, then it's not an argument > to not support all the others boards that did it the right way.
Well certainly the SD/MMC controllers are not all the same. Certainly the AM572x has 4 MMC controllers, only one of them can drive eMMC, one can do SDIO, one is only 4 bit so best for uSD, and I forget the limits on the last one. They have different widths and maximum speeds. So yes they are all MMC, but they are not all the same. > Stupid boards need stupid recovery procedure anyway, regardless of the > operating system. This is not a Debian problem. Or least Debian should not > try to officially support broken boards. This is just a wast of time. Better > to concentrate into work that yield a productive and safe result. > > This thread is explicitly about the Orange Pi Plus board, because there > exists a specific Debian installer SD card firmware for that board. This > board do the boot order in the right way and it's perfectly safe to write > the bootloader on his eMMC. > > I think it's a way too conservative approach, just give the option with a > warning. At least this will make some users happy by allowing to install > Debian on eMMC from his superb installer. The current situation prevent any > users to make a Debian install on a eMMC because of a tiny missing piece. > This is frustrating. -- Len Sorensen
