* Peter Ujfalusi peter.ujfalusi@ti.com [200220 14:08]:
On 18/02/2020 17.28, Tony Lindgren wrote:
Right. I'm not attached to the dummy dai, but looks like currently snd-soc-audio-graph-card won't work without it.
The generic cards will link up a dummy dai/codec when it is needed by DPMC.
Not sure what should be fixed here..
And we potentially do need a place to configure TDM slot specific stuff for mcbsp.
Yes, but you still have one port and one endpoint should not change the configuration which is already in used for the other endpoint.
OK so what's the fix for snd-soc-audio-graph-card expecting a separate DAI then?
Oh, I think there are Android apps to do that though.. Never tried if they work on droid4. But if they do, doing a register dump of mcbsp3 would show up how it's configured.
I don't see how you could record the data from the line which is connected to McBSP_DX pin (the pin is output).
But I might be missing something.
Yeah I don't know either, but the pins we have muxed for mcbsp3 are:
/* 0x4a100106 abe_pdm_ul_data.abe_mcbsp3_dr ag25 */ OMAP4_IOPAD(0x106, PIN_INPUT | MUX_MODE1)
/* 0x4a100108 abe_pdm_dl_data.abe_mcbsp3_dx af25 */ OMAP4_IOPAD(0x108, PIN_OUTPUT | MUX_MODE1)
/* 0x4a10010a abe_pdm_frame.abe_mcbsp3_clkx ae25 */ OMAP4_IOPAD(0x10a, PIN_INPUT | MUX_MODE1)
/* 0x4a10010c abe_pdm_lb_clk.abe_mcbsp3_fsx af26 */ OMAP4_IOPAD(0x10c, PIN_INPUT | MUX_MODE1)
Isn't the data receive there as mcbsp3_dr?
I think the link for the patches you posted is patching the snd-soc-audio-graph-card already?
Yes it does, but the functionality is there via custom machine drivers. What I afraid is that such a complex wiring as the Droid4 have it might be not possible to use a generic - fits everything - driver without making it a customized one ;)
Otho, if the only thing is the machine level DAPM switching and linking the paths then it might be relatively straight forward to extend the simple-card family.
Yeah or maybe it just needs to be handled directly in the cpcap, mdm6600 codec drivers?
Right. So right now it seems that for snd-soc-audio-graph-card needs the dummy dai, but it's unclear what would need to be changed to not use a dummy dai for mcbsp.
Since simple-card family can and will connect up dummy dai/codec when needed based on the setup, I would look at that and make it do so.
Oh so make simple-card spin up the dummy dai instead of mcbsp?
The dts snippets I posted earlier do follow the graph bindings as far as I know. But just to confirm, do you see any need to move things around there?
It also states that a port is a physical port which can have multiple endpoints. But multiple endpoint != DAI. port == dai.
I guess I'm getting really confused now.. Are you saying the dts needs to be changed too now?
Regards,
Tony