Quoting Doug Anderson (2020-12-17 13:45:18) > > On Wed, Dec 16, 2020 at 8:21 PM Stephen Boyd <swb...@chromium.org> wrote: > > > > if (M_CMD_CANCEL_EN || M_CMD_ABORT_EN) /* but not the other irqs > > like CMD_DONE or refill fifos */ > > writel(M_CMD_CANCEL_EN | M_CMD_ABORT_EN, se->base + > > SE_GENI_M_IRQ_CLEAR); > > > > This would let us limp along and try to send another transfer in the > > case that we timed out but the transfer went through by servicing our > > own interrupt. > > A few problems: > > 1. The cancel and abort are commands and they generate a "done" > interrupt along with their "cancel" and/or "abort". Clearing the > cancel/abort without the done will leave things in a much more > confused state.
Ah I didn't know that the DONE bit was set even for cancel/abort, but that makes sense given that it's a sequencer and everything that goes into the sequencer eventually gets "DONE". I agree if the DONE bit hanging around that really confuses stuff, so best to ignore it and figure out why interrupt latencies are leading to this problem.
