linux-kernel - Re: [PATCH 3/7] ASoC: codecs: tx-macro: Change mic control registers to volatile

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Date:   Tue, 21 Sep 2021 13:00:05 +0530
From:   Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        agross@...nel.org, bjorn.andersson@...aro.org, lgirdwood@...il.com,
        broonie@...nel.org, robh+dt@...nel.org, plai@...eaurora.org,
        bgoswami@...eaurora.org, perex@...ex.cz, tiwai@...e.com,
        rohitkr@...eaurora.org, linux-arm-msm@...r.kernel.org,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, swboyd@...omium.org,
        judyhsiao@...omium.org
Cc:     Venkata Prasad Potturu <potturu@...eaurora.org>
Subject: Re: [PATCH 3/7] ASoC: codecs: tx-macro: Change mic control registers
 to volatile


On 9/20/2021 6:54 PM, Srinivas Kandagatla wrote:
Thanks for your time Srini!!
>
> On 20/09/2021 08:35, Srinivasa Rao Mandadapu wrote:
>> Update amic and dmic related tx macro control registers to volatile
>>
>> Fixes: c39667ddcfc5 (ASoC: codecs: lpass-tx-macro: add support for 
>> lpass tx macro)
>>
>> Signed-off-by: Venkata Prasad Potturu <potturu@...eaurora.org>
>> Signed-off-by: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
>> ---
>>   sound/soc/codecs/lpass-tx-macro.c | 13 +++++++++++++
>>   1 file changed, 13 insertions(+)
>>
>> diff --git a/sound/soc/codecs/lpass-tx-macro.c 
>> b/sound/soc/codecs/lpass-tx-macro.c
>> index 9273724..e65b592 100644
>> --- a/sound/soc/codecs/lpass-tx-macro.c
>> +++ b/sound/soc/codecs/lpass-tx-macro.c
>> @@ -423,6 +423,13 @@ static bool tx_is_volatile_register(struct 
>> device *dev, unsigned int reg)
>>       case CDC_TX_TOP_CSR_SWR_DMIC1_CTL:
>>       case CDC_TX_TOP_CSR_SWR_DMIC2_CTL:
>>       case CDC_TX_TOP_CSR_SWR_DMIC3_CTL:
>> +    case CDC_TX_TOP_CSR_SWR_AMIC0_CTL:
>> +    case CDC_TX_TOP_CSR_SWR_AMIC1_CTL:
>> +    case CDC_TX_CLK_RST_CTRL_MCLK_CONTROL:
>> +    case CDC_TX_CLK_RST_CTRL_FS_CNT_CONTROL:
>> +    case CDC_TX_CLK_RST_CTRL_SWR_CONTROL:
>> +    case CDC_TX_TOP_CSR_SWR_CTRL:
>> +    case CDC_TX0_TX_PATH_SEC7:
>
> Why are these marked as Volatile?
> Can you provide some details on the issue that you are seeing?
>
> --srini

Without volatile these registers are not reflecting in Hardware and 
playback and capture is not working.

Will do recheck and keep only required registers as volatile.

>
>
>>           return true;
>>       }
>>       return false;
>> @@ -1674,6 +1681,12 @@ static int tx_macro_component_probe(struct 
>> snd_soc_component *comp)
>>         snd_soc_component_update_bits(comp, CDC_TX0_TX_PATH_SEC7, 0x3F,
>>                         0x0A);
>> +    snd_soc_component_update_bits(comp, 
>> CDC_TX_TOP_CSR_SWR_AMIC0_CTL, 0xFF, 0x00);
>> +    snd_soc_component_update_bits(comp, 
>> CDC_TX_TOP_CSR_SWR_AMIC1_CTL, 0xFF, 0x00);
>> +    snd_soc_component_update_bits(comp, 
>> CDC_TX_TOP_CSR_SWR_DMIC0_CTL, 0xFF, 0x00);
>> +    snd_soc_component_update_bits(comp, 
>> CDC_TX_TOP_CSR_SWR_DMIC1_CTL, 0xFF, 0x00);
>> +    snd_soc_component_update_bits(comp, 
>> CDC_TX_TOP_CSR_SWR_DMIC2_CTL, 0xFF, 0x00);
>> +    snd_soc_component_update_bits(comp, 
>> CDC_TX_TOP_CSR_SWR_DMIC3_CTL, 0xFF, 0x00);
>>         return 0;
>>   }
>>
-- 
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