linux-kernel - Re: [PATCH 07/13] ASoC: ti: davinci-i2s: Add TDM support

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Date: Wed, 20 Mar 2024 17:14:23 +0200
From: Péter Ujfalusi <peter.ujfalusi@...il.com>
To: Bastien Curutchet <bastien.curutchet@...tlin.com>,
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
 Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Jaroslav Kysela <perex@...ex.cz>,
 Takashi Iwai <tiwai@...e.com>
Cc: linux-sound@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, herve.codina@...tlin.com,
 christophercordahi@...ometrics.ca
Subject: Re: [PATCH 07/13] ASoC: ti: davinci-i2s: Add TDM support

HI Bastien,

On 20/03/2024 09:31, Bastien Curutchet wrote:
>>> +    if ((dev->tdm_slots || dev->slot_width) &&
>>> +        ((fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) !=
>>> SND_SOC_DAIFMT_BP_FC)) {
>>> +        dev_err(dev->dev, "TDM is only supported for BP_FC format\n");
>>> +        return -EINVAL;
>>
>> I think this is not a valid statement, Fsync can be generated internally
>> or coming from external source in TDM mode also.
>>
> 
> My hardware allow me to only test BP_FC so I wished to put some
> 'barriers' in front of untested things.

I don't see restrictions on the other changes affecting this to be lifted.
I would allow TDM for full clock provider mode also.

> 
> 
> Best regards,
> Bastien

-- 
Péter