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Message-ID: <791d7271-87a4-4ce9-9beb-e8c3ef235737@linaro.org>
Date:   Wed, 29 Nov 2023 19:21:51 +0100
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Subject: Re: [PATCH 5/5] ASoC: codecs: Add WCD939x Codec driver
Content-Language: en-US
To:     neil.armstrong@linaro.org,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Banajit Goswami <bgoswami@quicinc.com>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>
Cc:     linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org,
        linux-sound@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20231123-topic-sm8650-upstream-wcd939x-codec-v1-0-21d4ad9276de@linaro.org>
 <20231123-topic-sm8650-upstream-wcd939x-codec-v1-5-21d4ad9276de@linaro.org>
 <ad9a7c4b-82f4-4347-b4dd-a394e4ba95f0@linaro.org>
 <42a6f6e0-2846-4cdc-8702-493fadbafb98@linaro.org>
 <eaa034cb-06e8-4204-befa-4389bcb7d9e8@linaro.org>
 <0140f49d-c463-4011-8159-f4e56466e6bd@linaro.org>
From:   Konrad Dybcio <konrad.dybcio@linaro.org>
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In-Reply-To: <0140f49d-c463-4011-8159-f4e56466e6bd@linaro.org>
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On 29.11.2023 16:12, neil.armstrong@linaro.org wrote:
> On 29/11/2023 14:46, Konrad Dybcio wrote:
>> On 28.11.2023 16:01, Neil Armstrong wrote:
>>> On 25/11/2023 13:07, Konrad Dybcio wrote:
>>>
>>> <snip>
>>>
>>>>> +
>>>>> +static int wcd939x_io_init(struct snd_soc_component *component)
>>>>> +{
>>>>> +    snd_soc_component_write_field(component, WCD939X_ANA_BIAS,
>>>>> +                      WCD939X_BIAS_ANALOG_BIAS_EN, 1);
>>>> All of these values are BIT()s or 2-4 ORed BIT()s, can you check what they
>>>> mean?
>>>>
>>>> Same for almost all other snd_soc_component_ write/modify functions
>>>
>>> It uses snd_soc_component_write_field() with is the same as
>>> regmap_write_bits(REGISTER, REGISTER_MASK,
>>>                    FIELD_PREP(REGISTER_MASK, value);
>>>
>>> So the 1 mean write in enable mask in this case, and mask is single bit,
>>> read it exactly like if it was using FIELD_PREP(), but even for BITs.
>>>
>>> I did check every single snd_soc_component_write_field() so far to check
>>> it matches.
>>>
>>> Or it's another question ?
>> What I wanted to ask is whether it's possible to #define these magic
>> values within these fields
> 
> OK, so most of writes are to boolean enable bits, I can use true/false
> instead of 0 & 1 for those, would it be more readable ?
Yes, I think that would convey their meaning quite well

> 
> For the rest, those a integer values to a field, those are not bitmasks
> and I do not have the definition of the values.
> 
> I did a full cleanup and tried to define as much as possible,
> there were still lot of places where not defined bitmasks we used,
> but there's still some integer values, but I think it's acceptable.
No worries, what you say already sounds very cool!

Konrad