On Thu, Aug 05, 2010 at 06:01:24PM -0700, david@xxxxxxx wrote: > On Thu, 5 Aug 2010, Brian Swetland wrote: >> Obviously not all clocks are stopped (the DSP and codec are powered >> and clocked, for example), but yeah we can clock gate and power gate >> the cpu and most other peripherals while audio is playing on a number >> of ARM SoC designs available today (and the past few years). > does this then mean that you have multiple variations of suspend? > for example, one where the audio stuff is left powered, and one where it > isn't? This was the core of the issue I was raising in the last thread about this (the one following the rename to suspend blockers). Essentially what happens in a mainline context is that some subsystems can with varying degress of optionality ignore some or all of the instruction to suspend and keep bits of the system alive during suspend. Those that stay alive will either have per subsystem handling or will be outside the direct control of the kernel entirely (the modem is a good example of the latter case in many systems - in terms of the software it's essentially a parallel computer that's sitting in the system rather than a perhiperal of the AP). _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
