On Wed, Apr 16, 2014 at 01:26:41PM +0000, Bard Liao wrote:
*MUST* use regmap to do this. What's not been clear is if this device has a control interface that looks enough like a register map to be implemented like one but since we're just guessing based on a combination of the code and the HDA spec it's not entirely clear.
I am a little bit confused about it. I thought you told me not using regmap. Actually, I don't know how to use dapm without implementing register I/O. Can I just convert rt286_hw_read/write to regmap?
As far as we've been able to tell thus far (based on inferring stuff from the HDA spec) you shouldn't be doing register I/O at all, the device doesn't really have things that look enough like registers.
You can implement non-register DAPM widgets - look at the virtual controls in the core, or things using SND_SOC_NOPM.