Mason <slash.tmp@xxxxxxx> writes: > On 17/11/2016 14:05, Måns Rullgård wrote: > >> I don't see why the sbox needs to be configured first. It's just a >> crossbar switch, and until something starts actually issuing requests, >> it shouldn't matter how it is connected. > > If the NAND controller starts sending to an uninitialized SBOX, > then (IIUC) some bits are lost forever (black-holed). That's expected. Don't do that. > So "NAND, SBOX, MBUS" cannot work. > > "SBOX, MBUS, NAND" should work, but it doesn't. > > "SBOX, NAND, MBUS" works. > > Perhaps there is a better solution than making a channel exclusive > to a client. Do you have a suggestion? First figure out exactly what the hardware requires. How did the hardware designers expect it to be used? -- Måns Rullgård -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
