[alsa-devel] Broken headphone and speaker amplifier supplies for the rt5640 driver

Hi,

The rt5640 driver sets for both the headphone and speaker amplifier widget the shift to SND_SOC_NOPM, which is -1. This doesn't make much sense and breaks compilation with some changes I've made.

I guess for the heaphone amplifier the right fix is to set the shift to RT5640_PWR_HA_BIT. For the speaker amplifier I'd assume that the right bit is RT5640_PWR_CLS_D_BIT. But the speaker amplifier widget also as an event callback in which it already seems to set/clear the bit. I think the right fix is to remove the register change from the event callback and set the shift to RT5640_PWR_CLS_D_BIT. But I neither have the hardware nor the datasheet, so this is all just an educated guess.

- Lars