On Thu, Oct 26, 2023 at 12:58:42PM -0500, Rob Herring wrote:

On Mon, Oct 23, 2023 at 10:07:17AM +0800, Chancel Liu wrote:

quoted

Add a property to list audio sound widgets which are marked ignoring
system suspend. Paths between these endpoints are still active over
suspend of the main application processor that the current operating
system is running.

Perhaps it would be better to define components used for low power 
audio rather than the OS mode that gets used. Isn't LPA just audio 
handling that doesn't require the OS CPU to be involved? So the state of 
the CPU is kind of orthogonal.

Not really - you can have bypass paths that don't touch the AP but which
will have the power cut if the AP goes into suspend and it can be a
system integration decision which components that will be true for.
Often it's an inflexible PMIC/MCU setup managing the lowest system power
states.  The pure low power audio bit we should already be able to
figure out.