[alsa-devel] No sound captured with SGTL5000 on i.MX6 in I²S master mode

Michael Trimarchi michael at amarulasolutions.com
Thu Sep 18 15:35:15 CEST 2014


Hi

On Thu, Sep 18, 2014 at 3:30 PM, Fabio Estevam <festevam at gmail.com> wrote:
> Hi Jean-Michel,
>
> On Thu, Sep 18, 2014 at 9:56 AM, Jean-Michel Hautbois
> <jean-michel.hautbois at vodalys.com> wrote:
>> Hi,
>>
>> Sorry if double posting, I have not received confirmation on
>> subscription yesterday... So I try again :/.
>>
>> I have a custom i.MX6 board, and have a sgtl5000 connected on it. I
>> would like to have it used in master mode (it is used only for audio
>> capture) but I get a "pcm_read:2031: read error: Input/output error"
>> when using arecord.
>> I have checked my signals and I get something on I²S which seems to be good.
>> I launch :
>> $> arecord -f cd -Dhw:0,0 -v -V stereo
>> Receive Frame Sync is 44.1KHz
>> Receive Clock Signal is ~1MHz (I can be more precise if needed)
>> Data Receive is present, only when arecord is launched. It stops when
>> there is no capture asked.
>> Both clocks are still present even when no arecord is running.
>>
>> This suggests, for me, that master mode is working.
>> So, I don't know why I can't get any data to my arecord. Is this a
>> left/right justified master mode ? Anything else ?
>

Yes, can you check if the direction of the mux-port is correct and you
are really get data.

> I am also trying to test fsl_ssi in master mode.
>
> I am running linux-next 20140912 with the following changes to get SSI
> in master mode:
>
> --- a/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
> @@ -532,6 +532,7 @@
>  };
>
>  &ssi2 {
> +       fsl,mode = "i2s-master";
>         status = "okay";
>  };
>
> diff --git a/sound/soc/fsl/imx-wm8962.c b/sound/soc/fsl/imx-wm8962.c
> index 3a3d17c..09ea6a5 100644
> --- a/sound/soc/fsl/imx-wm8962.c
> +++ b/sound/soc/fsl/imx-wm8962.c
> @@ -247,7 +247,7 @@ static int imx_wm8962_probe(struct platform_device *pdev)
>         data->dai.platform_of_node = ssi_np;
>         data->dai.ops = &imx_hifi_ops;
>         data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
> -                           SND_SOC_DAIFMT_CBM_CFM;
> +                           SND_SOC_DAIFMT_CBS_CFS;
>
>         data->card.dev = &pdev->dev;
>         ret = snd_soc_of_parse_card_name(&data->card, "model");
>
> ,but when I do aplay I do not get any sound.
>
>> I am wondering if I forgot something in my DT or if I need to do
>> something else :
>>
>>     sound {
>>         compatible = "fsl,imx6q-vbx3-sgtl5000",
>>                  "fsl,imx-audio-sgtl5000";
>>         model = "imx6q-vbx3-sgtl5000";
>>         ssi-controller = <&ssi1>;
>>         audio-codec = <&codec>;
>>         audio-routing =
>>             "LINE_IN", "Line In Jack";
>>         mux-int-port = <1>;
>>         mux-ext-port = <5>;
>>     };
>>
>> &audmux {
>>     pinctrl-names = "default";
>>     pinctrl-0 = <&pinctrl_audmux>;
>>     status = "okay";
>> };
>>
>> &i2c2 {
>>     clock-frequency = <100000>;
>>     pinctrl-names = "default";
>>     pinctrl-0 = <&pinctrl_i2c2>;
>>     status = "okay";
>>
>>     codec: sgtl5000 at 0a {
>>         compatible = "fsl,sgtl5000";
>>         reg = <0x0a>;
>>         clocks = <&clks 201>;
>>         VDDA-supply = <&vgen6_reg>;
>>         VDDIO-supply = <&vgen6_reg>;
>>         sysclk = <24000000>;
>>     };
>> };
>>
>> &iomuxc {
>>     pinctrl-names = "default";
>>     pinctrl-0 = <&pinctrl_hog>;
>>
>>     imx6qdl-vbx3 {
>>         pinctrl_audmux: audmuxgrp {
>>             fsl,pins = <
>>                 MX6QDLPAD_DISP0_DAT13__AUD5_RXFS        0x130b0
>>                 MX6QDL_PAD_DISP0_DAT14__AUD5_RXC        0x130b0
>>                 MX6QDL_PAD_DISP0_DAT19__AUD5_RXD        0x130b0
>>             >;
>>         };
>> };
>>
>> &ssi1 {
>>     status = "okay";
>>     codec-handle = <&codec>;
>
> I think this codec-handle is not needed here.
>
>>     fsl,mode = "i2s-master";
>>     fsl,ssi-asynchronous; /* Not sure about it, but does not change anything */
>> };
>>
>> Here is the dmesg part :
>> [    6.026803] sgtl5000 1-000a: sgtl5000 revision 0x11
>> [    6.129380] imx-sgtl5000 sound: snd_soc_register_card failed (-517)
>> [    6.248849] platform sound: Driver imx-sgtl5000 requests probe deferral
>> [    6.311643] sgtl5000 1-000a: Using internal LDO instead of VDDD
>> [    6.393196] imx-sgtl5000 sound: sgtl5000 <-> 2028000.ssi mapping ok
>>
>> And the user space commands :
>> $> arecord -l
>> **** List of CAPTURE Hardware Devices ****
>> card 0: imx6qvbx3sgtl50 [imx6q-vbx3-sgtl5000], device 0: HiFi sgtl5000-0 []
>>   Subdevices: 1/1
>>   Subdevice #0: subdevice #0
>>
>> $> arecord -v -V stereo -fdat -D hw:0,0 somefile.wav
>> Recording WAVE 'somefile.wav' : Signed 16 bit Little Endian, Rate
>> 48000 Hz, Stereo
>> Hardware PCM card 0 'imx6q-vbx3-sgtl5000' device 0 subdevice 0
>> Its setup is:
>>   stream       : CAPTURE
>>   access       : RW_INTERLEAVED
>>   format       : S16_LE
>>   subformat    : STD
>>   channels     : 2
>>   rate         : 48000
>>   exact rate   : 48000 (48000/1)
>>   msbits       : 16
>>   buffer_size  : 16384
>>   period_size  : 4096
>>   period_time  : 85333
>>   tstamp_mode  : NONE
>>   period_step  : 1
>>   avail_min    : 4096
>>   period_event : 0
>>   start_threshold  : 1
>>   stop_threshold   : 16384
>>   silence_threshold: 0
>>   silence_size : 0
>>   boundary     : 1073741824
>>   appl_ptr     : 0
>>   hw_ptr       : 0
>> arecord: pcm_read:2031: read error: Input/output error
>>

The clock is not get in

Michael

>> The kernel is 3.17-rc5.
>>
>> Thanks for reading all this, and for any advice :).
>
> I am adding some more folks in Cc in case they have some suggestions.
>
> Regards,
>
> Fabio Estevam
> _______________________________________________
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> Alsa-devel at alsa-project.org
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-- 
| Michael Nazzareno Trimarchi                     Amarula Solutions BV |
| COO  -  Founder                                      Cruquiuskade 47 |
| +31(0)851119172                                 Amsterdam 1018 AM NL |
|                  [`as] http://www.amarulasolutions.com               |


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