lkml.org 
[lkml]   [2018]   [Mar]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: omap4-droid4: voice call support was Re: [PATCHv5,5/5] ARM: dts: omap4-droid4: add soundcard
    On Wed, Mar 28, 2018 at 12:22:37AM +0200, Sebastian Reichel wrote:
    > On Tue, Mar 27, 2018 at 08:14:41PM +0800, Mark Brown wrote:

    > > No, this is exactly the sort of use case with multiple DAIs that the
    > > graph card is intended to enable over the old simple-card.

    > +----------+ +-------------+
    > | OMAP4 | | CPCAP |
    > | | | |
    > | [McBSP2] | <-----> | [HiFi DAI] |
    > | | | |
    > | [McBSP3] | <--+--> | [Voice DAI] |
    > | | | | |
    > +----------+ | +-------------+
    > |
    > +----------+ | +-------------+
    > | MDM6600 | | | WL1285 |
    > | | | | |
    > | [DAI] | <--+--> | [DAI] |
    > | | | |
    > +----------+ +-------------+

    > Legend:
    > OMAP4 = SoC running Linux
    > CPCAP = Audio codec
    > MDM6600 = Baseband
    > WL1285 = Bluetooth

    > Re-reading the audio-graph-card binding document I still don't see
    > how the network (OMAP.McBSP3, CPCAP.Voice, MDM6600, WL1285) is
    > supposed to look like. It seems to expect point-to-point DAI
    > connections.

    Ugh, a TDM mux? That's really unusual and not particularly supported
    yet, you'd need to extend the graph card to do it. It's where things
    should end up for a generic card though.
    [unhandled content-type:application/pgp-signature]
    \
     
     \ /
      Last update: 2018-03-28 04:29    [W:3.765 / U:0.040 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site