linux-kernel - Re: [PATCH 5/5] ASoC: codecs: Add WCD939x Codec driver

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Date:   Tue, 28 Nov 2023 10:18:20 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Mark Brown <broonie@...nel.org>
Cc:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Banajit Goswami <bgoswami@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        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>, linux-arm-msm@...r.kernel.org,
        alsa-devel@...a-project.org, linux-sound@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] ASoC: codecs: Add WCD939x Codec driver

Hi,

On 24/11/2023 11:19, Mark Brown wrote:
> On Thu, Nov 23, 2023 at 03:49:15PM +0100, Neil Armstrong wrote:
> 
>> +	if (wcd939x->variant == WCD9390) {
>> +		if (mode_val == CLS_H_HIFI || mode_val == CLS_AB_HIFI) {
>> +			dev_info(component->dev, "%s: Invalid HPH Mode, default to CLS_H_ULP\n",
>> +				 __func__);
>> +			mode_val = CLS_H_ULP;
>> +		}
>> +	}
>> +	if (mode_val == CLS_H_NORMAL) {
>> +		dev_info(component->dev, "%s: Invalid HPH Mode, default to class_AB\n",
>> +			 __func__);
>> +		mode_val = CLS_H_ULP;
>> +	}
> 
> This lets people spam the logs from userspace, why not just return an
> error?

Indeed, will switch to an error, seems safer

> 
>> +	if (hphr)
>> +		wcd939x->comp2_enable = value;
>> +	else
>> +		wcd939x->comp1_enable = value;
> 
> Are there really no constraints on the values for these things?

Nop, it's basically boolean, so any value > 0 is true.

> 
>> +static const struct snd_kcontrol_new wcd9390_snd_controls[] = {
>> +	SOC_ENUM_EXT("EAR PA GAIN", wcd939x_ear_pa_gain_enum,
>> +		     wcd939x_ear_pa_gain_get, wcd939x_ear_pa_gain_put),
> 
> Gains should be be named Volume.  Is there no TLV information?

Let me check that, I maybe forgot to add it.

> 
>> +static irqreturn_t wcd939x_wd_handle_irq(int irq, void *data)
>> +{
>> +	return IRQ_HANDLED;
>> +}
> 
> Why even request the interrupt if it's just going to be ignored?

Good question! I'll check this

Thanks,
Neil