On 23 January 2018 at 22:56, Linus Walleij <linus.wall...@linaro.org> wrote: > This implements rudimentary support for interrupt generation on the > PL110. I am working on a new DRI/KMS driver for Linux and since that > uses the blanking interrupt, we need something to fire here. Without > any interrupt support Linux waits for a while and then gives ugly > messages about the vblank not working in the console (it does not > hang perpetually or anything though, DRI is pretty forgiving). > > I solved it for now by setting up a timer to fire at 60Hz and pull > the interrupts for "vertical compare" and "next memory base" > at this interval. This works fine and fires roughly the same number > of IRQs on QEMU as on the hardware and leaves the console clean > and nice. > > People who want to create more accurate emulation can probably work > on top of this if need be. It is certainly closer to the hardware > behaviour than what we have today anyway.
Yeah, I think that "fire every 60Hz" is good enough for now. Applied to target-arm.next (with the long lines checkpatch complains about folded). thanks -- PMM
