Re: [PATCH v3] arm64: dts: imx8mq: Add sai3 and sai6 nodes

[Angus Ainslie]

Hi Daniel,

On 2019-07-03 07:10, Daniel Baluta wrote:
> On Wed, Jul 3, 2019 at 4:01 PM Angus Ainslie <angus@xxxxxxxx> wrote:
> > Hi Andra,
> >
> > I tried this out on linux-next and I'm not able to record or play 
> > sound.
> >
> > I also added the sai2 entry to test out our devkit and get a PCM 
> > timeout
> > with that.
>
> Hi Angus,
>
> There are still lots of SAI patches that need to be upstream. Me and 
> Andra
> will be working on that over this summer.
>
> > On 2019-07-02 07:23, Andra Danciu wrote:
> > > SAI3 and SAI6 nodes are used to connect to an external codec.
> > > They have 1 Tx and 1 Rx dataline.
> > >
> > > Cc: Daniel Baluta <daniel.baluta@xxxxxxx>
> > > Signed-off-by: Andra Danciu <andradanciu1997@xxxxxxxxx>
> > > ---
> > > Changes since v2:
> > >       - removed multiple new lines
> > >
> > > Changes since v1:
> > >       - Added sai3 node because we need it to enable audio on pico-pi-8m
> > >       - Added commit description
> > >
> > >  arch/arm64/boot/dts/freescale/imx8mq.dtsi | 29
> > > +++++++++++++++++++++++++++++
> > >  1 file changed, 29 insertions(+)
> > >
> > > diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> > > b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> > > index d09b808eff87..736cf81b695e 100644
> > > --- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> > > +++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> > > @@ -278,6 +278,20 @@
> > >                       #size-cells = <1>;
> > >                       ranges = <0x30000000 0x30000000 0x400000>;
> > >
> > > +                     sai6: sai@30030000 {
> > > +                             compatible = "fsl,imx8mq-sai",
> >
> > I don't find this compatible string in sound/soc/fsl/fsl_sai.c. Aren't
> > the registers at a different offset from "fsl,imx6sx-sai".
>
> Yes, you are right on this. We are trying to slowly push all our 
> internal-tree
> patches to mainline. Obviously, with started with low hanging fruits, 
> DTS
> nodes and small SAI fixes.
>
> Soon, we will start to send patches for SAI IP ipgrade for imx8.
>
> > How is this supposed to work ?
>
> For the moment it won't work unless we will upstream all our SAI
> internal patches.
> But we will get there hopefully this summer.

Shouldn't a working driver be upstream before enabling it in the 
devicetree ?

Thanks
Angus

> Thanks,
> Daniel.