On Mon, Feb 11, 2019 at 03:14:53PM +0100, Greg Kroah-Hartman wrote:
On the Allwinner A64 SoCs, the audio codec has a built-in headphone amplifier. This amplifier has a power supply separate from the rest of the analog audio circuitry, labeled cpvdd.
This patch adds a DAPM widget for this supply, and ties it to the headphone amp widget.
This is more a new feature than a bug fix, it doesn't look like obvious stable material.