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7e8cdbcf65
While #12256 papered over the tracking of a *single* suspend -> (resume->suspend) series of events, things still go out of sync if you tack on *more* suspend/resume events after that. The upside is that our *actual* tracking of suspend/resume is solid, so at least we're actually doing the right thing as far as PM is concerned. The downside is that on Kobo, the frontlight handling code is full of delays, and the ramping down/up itself also takes some time, so things can quickly overrun into the wrong event. This means a couple of things: * We need to cancel any scheduled frontlight toggles and ramps on Kobo, to ensure that only the one from the *last* event received goes through, in an attempt to limit the amount of potential crossover. * Tracking fl_was_on *cannot* reliably be done from the suspend/resume handlers (especially on Kobo), as the ramps themselves may cross over the event barriers (and we potentially cancel the task anyway), so this was moved to the very few interactive callers that will actually change the frontlight state. * On Kobo, crossover is still *somewhat* possible because the ramps take time. It's mostly harmless for the ramp down, we just need to tweak the ramp down to start from the actual intensity to avoid a weird jump on the initial step if there's an inconsistency. For the ramp up, we potentially need to manually kill the light first, because off -> on assumes it *really* starts from off ;). Followup to #12256 Fix #12246 (again) |
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