Hi Simon, > -----Original Message----- > From: Simon Horman [mailto:horms@xxxxxxxxxxxx] > Sent: 21 December 2017 10:45 > To: Biju Das <biju.das@xxxxxxxxxxxxxx> > Cc: Rob Herring <robh+dt@xxxxxxxxxx>; Mark Rutland > <mark.rutland@xxxxxxx>; Magnus Damm <magnus.damm@xxxxxxxxx>; > Chris Paterson <Chris.Paterson2@xxxxxxxxxxx>; Fabrizio Castro > <fabrizio.castro@xxxxxxxxxxxxxx>; devicetree@xxxxxxxxxxxxxxx; linux-renesas- > soc@xxxxxxxxxxxxxxx > Subject: Re: [PATCH 8/9] ARM: dts: iwg22d-sodimm: Sound DMA support via > SRC on DTS > > On Wed, Dec 20, 2017 at 08:02:04PM +0000, Biju Das wrote: > > DMA transfer to/from SRC > > > > DMA DMApp > > [MEM] -> [SRC] -> [SSIU] -> [SSI] > > > > DMA DMApp > > [MEM] <- [SRC] <- [SSIU] <- [SSI] > > > > Current sound driver is supporting SSI/SRC random connection. > > So, this patch is trying > > SSI3 -> SRC3 > > SSI4 <- SRC4 > > I am curious to know why the selection here differs from that present in > iwg20d-q7-common. Is it an arbitrary decision? > > Likewise for other uses of ssi*, src* and dvc* in this patchset. For ssi*, on this board, SSI3/4 interface is connected to Audio In/Out. For src*, the original bsp from iwave is using src3/src4, also it is arbitrary as per the data sheet. For dvc*, Again it is arbitrary as per the data sheet. > > > > Signed-off-by: Biju Das <biju.das@xxxxxxxxxxxxxx> > > Reviewed-by: Fabrizio Castro <fabrizio.castro@xxxxxxxxxxxxxx> > > --- > > arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts > > b/arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts > > index 0f880c1..2cac57c 100644 > > --- a/arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts > > +++ b/arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts > > @@ -183,8 +183,8 @@ > > > > rcar_sound,dai { > > dai0 { > > -playback = <&ssi3>; > > -capture = <&ssi4>; > > +playback = <&ssi3 &src3>; > > +capture = <&ssi4 &src4>; > > }; > > }; > > }; > > -- > > 1.9.1 > > [https://www2.renesas.eu/media/email/unicef_2017.jpg] This Christmas, instead of sending out cards, Renesas Electronics Europe have decided to support Unicef with a donation. For further details click here<https://www.unicef.org/> to find out about the valuable work they do, helping children all over the world. We would like to take this opportunity to wish you a Merry Christmas and a prosperous New Year. Renesas Electronics Europe Ltd, Dukes Meadow, Millboard Road, Bourne End, Buckinghamshire, SL8 5FH, UK. Registered in England & Wales under Registered No. 04586709. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
