linux-kernel - Re: [PATCH] ASoC: ti: Allocate dais dynamically for TDM and audio graph card

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Message-ID: <07989190-e110-13c4-50ea-875431725b47@ti.com>
Date:   Tue, 18 Feb 2020 17:26:22 +0200
From:   Peter Ujfalusi <peter.ujfalusi@...com>
To:     Tony Lindgren <tony@...mide.com>
CC:     Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, <alsa-devel@...a-project.org>,
        <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
        Aaro Koskinen <aaro.koskinen@....fi>,
        "Arthur D ." <spinal.by@...il.com>,
        Jarkko Nikula <jarkko.nikula@...mer.com>,
        Merlijn Wajer <merlijn@...zup.org>,
        Pavel Machek <pavel@....cz>, Sebastian Reichel <sre@...nel.org>
Subject: Re: [PATCH] ASoC: ti: Allocate dais dynamically for TDM and audio
 graph card



On 18/02/2020 1.36, Tony Lindgren wrote:
> * Tony Lindgren <tony@...mide.com> [200217 23:10]:
>> * Peter Ujfalusi <peter.ujfalusi@...com> [200217 12:10]:
>>> On 14/02/2020 19.03, Tony Lindgren wrote:
>>>> But right now in droid4 voice call case mcbsp is just the i2s transport,
>>>> and everything happens betwee the modem and the cpcap pmic.
>>>
>>> Iow you don't need McBSP DAI at all. If you would have added the dummy
>>> codec to McBSP !3 and use that, it would work in a same way, or to DMIC
>>> or McPDM...
>>>
>>> The McBSP ops are NULL for the dummy dai, so McBSP is turned off.
>>
>> Hmm yeah I don't know if the cpcap codec on the same mcbsp needs
>> mcbsp for voice call.
>>
>> According to Sebastian sounds like mcbsp can be idle at that point.
>>
>> But what about capture of voice call at the mcbsp from the
>> TDM slot? In that case mcbsp would be active.
> 
> Looks like only initializing only one mcbsp3 instance here
> instead of two will produce an oops as below.
> 
> I'm not sure how this is supposed to work for
> snd-soc-audio-graph-card with multipe endpoints connected
> to just one mcbsp dai instance?
> 
> Regards,
> 
> Tony
> 
> 8< -------------------
What is the kernel version?
The context is missing...
Who printed the line:
dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);

This is only possible if snd_soc_component_initialize() fail, which can
only fail if snd_soc_component_unique_name() fails.

> Internal error: Oops: 805 [#1] PREEMPT SMP ARM
> snd_soc_del_component_unlocked+0xf4/0x110

Not too helpful ;)

> ...
> [   39.616027] Backtrace:
> [   39.616149] [<bf3f6bc4>] (snd_soc_del_component_unlocked [snd_soc_core]) from [<bf3f8ff4>] (snd_soc_add_component+0x238/0x374 [snd_s)
> [   39.616149]  r7:00000002 r6:00000002 r5:ec9a0e78 r4:00000122
> [   39.678283] qmi_wwan 1-1:1.6: cdc-wdm1: USB WDM device
> [   39.739074] [<bf3f8dbc>] (snd_soc_add_component [snd_soc_core]) from [<bf3f9180>] (snd_soc_register_component+0x50/0x60 [snd_soc_cor)
> [   39.739074]  r10:bf4582d0 r9:ec9d0840 r8:00000002 r7:00000002 r6:ec9d0640 r5:bf4584ac
> [   39.800842] asoc-audio-graph-card soundcard: using device tree for GPIO lookup
> [   39.808685]  r4:eed52410
> [   39.862304] [<bf3f9130>] (snd_soc_register_component [snd_soc_core]) from [<bf4088b4>] (devm_snd_soc_register_component+0x54/0x90 [s)
> [   39.862304]  r7:ec9d0640 r6:bf4584ac r5:ec9d3040 r4:eed52410
> [   39.925048] qmi_wwan 1-1:1.6 wwan1: register 'qmi_wwan' at usb-4a064800.ohci-1, WWAN/QMI device, 2e:59:df:3f:4f:ef
> [   39.984558] [<bf408860>] (devm_snd_soc_register_component [snd_soc_core]) from [<bf456fb8>] (asoc_mcbsp_probe+0x3e8/0x574 [snd_soc_o)
> [   39.984558]  r9:ec9d0840 r8:ec9f4000 r7:eed52410 r6:00000000 r5:eed52400 r4:ec9d0840
> [   39.984588] [<bf456bd0>] (asoc_mcbsp_probe [snd_soc_omap_mcbsp]) from [<c068475c>] (platform_drv_probe+0x58/0xa8)
> [   39.984619]  r10:00000000 r9:0000002e r8:bf459014 r7:00000000 r6:bf459014 r5:00000000
> [   40.044342] of_get_named_gpiod_flags: can't parse 'pa-gpios' property of node '/soundcard[0]'
> [   40.051788]  r4:eed52410
> [   40.100769] [<c0684704>] (platform_drv_probe) from [<c06820ac>] (really_probe+0x1ec/0x358)
> 

- Péter

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