On 02/17/2016 08:38 AM, Simon Horman wrote:
Define the generic R8A7794 part of the sound device node.
This sound device is a complex one and comprises the Audio Clock Generator
(ADG), Sampling Rate Converter Unit (SCU), Serial Sound Interface [Unit]
(SSI[U]), and Audio DMAC-Peripheral-Peripheral.
It is up to the board file to enable the device.
This patch is based on the R8A7791 sound work by Kuninori Morimoto.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
(snip)
+ rcar_sound,src {
+ src1: src@1 {
+ interrupts = <GIC_SPI 353 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x87>, <&audma0 0x9c>;
+ dma-names = "rx", "tx";
+ };
+ src2: src@2 {
+ interrupts = <GIC_SPI 354 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x89>, <&audma0 0x9e>;
+ dma-names = "rx", "tx";
+ };
+ src3: src@3 {
+ interrupts = <GIC_SPI 355 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x8b>, <&audma0 0xa0>;
+ dma-names = "rx", "tx";
+ };
+ src4: src@4 {
+ interrupts = <GIC_SPI 356 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x8d>, <&audma0 0xb0>;
+ dma-names = "rx", "tx";
+ };
+ src5: src@5 {
+ interrupts = <GIC_SPI 357 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x8f>, <&audma0 0xb2>;
+ dma-names = "rx", "tx";
+ };
+ src6: src@6 {
+ interrupts = <GIC_SPI 358 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x91>, <&audma0 0xb4>;
+ dma-names = "rx", "tx";
+ };
+ };
I think this can't work correctly, because driver is assuming
DT has all channles (from 0). (see linux/sound/soc/sh/rcar/src.c :: rsnd_src_probe)
Can you adds dummy src0 with some comments ? or fix src.c driver ?
I would prefer the driver to be fixed (I had a similar patchset locally
and I found it doesn't work).
You mean you had R8A7794 sound patch set too?
Yes, I was working on it recently.
I suppose we should coordinate these things in future to avoid
duplicated effort.
Yes, seems a good idea now. :-)
The reason is that DT should describe
the hardware rather than the current state of the software.
Yes, of course. Just tell me do I have to fix the driver *before* this
patch set is accepted?
I did not entirely get to the bottom of the problem, but I think that at
the very least something needs to be done about the for_each_rsnd_src()
loop in rsnd_src_probe.
It's not that it replies to my question. :-)
So you're looking at this issue yourself?
I have not got very far, as you can see, but I was planning to look into it.
I don't mind if you want to do so.
After consultation with the management, I'm going to look into this issue
myself. :-)
Excellent.
But not immediately. I have some other things to look at before that (DU
and AVB), they'll going to take some (significant) time... :-(
FWIW, I can test anything you come up with for the r8a7794 an alt board
I have remote access to Alt now, in fact using it currently for the AVB work.
or post patches for it once you have r8a7794/silk sorted out.
I already have audio on these working. Or you're going to wait until I fix
the SRC issue?
[...]
MBR, Sergei
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