[alsa-devel] Question about your DSP topic branch
lrg at slimlogic.co.uk
Thu Mar 31 23:35:22 CEST 2011
On Wed, 2011-03-30 at 23:40 -0700, Patrick Lai wrote:
> Hi Liam/Mark,
> In the back-end platform driver, routing table and array of widgets are
> defined to describe interconnection of front-end and back-end. Instead
> of defining FE and BE as AIF pin using SND_SOC_DAPM_AIF_IN/OUT macros,
> I would like to use SND_SOC_DAPM_AIF_IN_E/OUT_E macros. Essentially, I
> want to register event handler to jump start routing in the DSP for a
> newly activated FE under multiple streams to single HW path scenario. At
> this time, BE is already activated so I need other mechanism to jump
> start routing. I could put the logic in my front-end CPU DAI driver.
> However, I feel that path setup should be handled by DAPM/DSP framework.
> Hence, I am looking for a good place to trigger calling of event handler
> in soc-dapm.c/soc-dsp.c. Any suggestion?
So iiuc, your BE is active (with another FE) and you then enable a
another FE that is connected to the already active BE ?
It should be possible to add support for the _E() macros in soc-dsp.c,
but I'm not sure why it's required atm since we dont need this for OMAP4
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