linux-kernel - Re: [PATCH v2 4/5] ASoC: codecs: tx-macro: Update tx default values

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Message-ID: <5748236d-7db2-9d19-a113-6e66b3dee81f@codeaurora.org>
Date:   Fri, 8 Oct 2021 19:37:12 +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 v2 4/5] ASoC: codecs: tx-macro: Update tx default values


On 9/28/2021 2:01 PM, Srinivas Kandagatla wrote:
>
>
> On 27/09/2021 17:42, Srinivasa Rao Mandadapu wrote:
>>
>> On 9/27/2021 4:12 PM, Srinivas Kandagatla wrote:
>> Thanks for your time Srini!!
>>>
>>> On 22/09/2021 13:31, Srinivasa Rao Mandadapu wrote:
>>>> Update mic control register default values to hardware reset values
>>>>
>>>> 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 | 6 +++---
>>>>   1 file changed, 3 insertions(+), 3 deletions(-)
>>>>
>>>> diff --git a/sound/soc/codecs/lpass-tx-macro.c 
>>>> b/sound/soc/codecs/lpass-tx-macro.c
>>>> index e980b2e..66c39fb 100644
>>>> --- a/sound/soc/codecs/lpass-tx-macro.c
>>>> +++ b/sound/soc/codecs/lpass-tx-macro.c
>>>> @@ -279,7 +279,7 @@ static const struct reg_default tx_defaults[] = {
>>>>       { CDC_TX_CLK_RST_CTRL_SWR_CONTROL, 0x00},
>>>>       { CDC_TX_TOP_CSR_TOP_CFG0, 0x00},
>>>>       { CDC_TX_TOP_CSR_ANC_CFG, 0x00},
>>>> -    { CDC_TX_TOP_CSR_SWR_CTRL, 0x00},
>>>> +    { CDC_TX_TOP_CSR_SWR_CTRL, 0x60},
>>>
>>> This does not make sense as this register only has one bit to control.
>>> Why do we even need to change this, can you please explain what 
>>> happens if we do not change this?
>>
>> This register change is not making any impact. But when verified , 
>> reset state of this register is 0x60. so is the reason for change.
>>
>> Will revert it and post again.
>>
>>>
>>>>       { CDC_TX_TOP_CSR_FREQ_MCLK, 0x00},
>>>>       { CDC_TX_TOP_CSR_DEBUG_BUS, 0x00},
>>>>       { CDC_TX_TOP_CSR_DEBUG_EN, 0x00},
>>>> @@ -290,8 +290,8 @@ static const struct reg_default tx_defaults[] = {
>>>>       { CDC_TX_TOP_CSR_SWR_DMIC1_CTL, 0x00},
>>>>       { CDC_TX_TOP_CSR_SWR_DMIC2_CTL, 0x00},
>>>>       { CDC_TX_TOP_CSR_SWR_DMIC3_CTL, 0x00},
>>>> -    { CDC_TX_TOP_CSR_SWR_AMIC0_CTL, 0x00},
>>>> -    { CDC_TX_TOP_CSR_SWR_AMIC1_CTL, 0x00},
>>>> +    { CDC_TX_TOP_CSR_SWR_AMIC0_CTL, 0x0E},
>>>> +    { CDC_TX_TOP_CSR_SWR_AMIC1_CTL, 0x0E},
>>>
>>> These two registers should have default value of 0x06 as this has 
>>> only one clk selection field with bits 2:1.
>>
>> In Kodiak document reset state 0x0E and clk selection field is with 
>> bits 3:1
>>
>> *LPASS_TX_TX_TOP_CSR_SWR_MIC1_CTL*|0x32200D4
>> Offset:     0x54     Reset State:     0x0000000E 
>
> In that case you should probably consider using 
> regmap_register_patch() for corrections to the default registers in 
> sm8250 case.
As regmap_register_patch() not working in this use case, updating 
defaults in probe for sc7280 specific differences.
>
> --srini
>
>>
>>>
>>> -srini
>>>
>>>
>>>>       { CDC_TX_INP_MUX_ADC_MUX0_CFG0, 0x00},
>>>>       { CDC_TX_INP_MUX_ADC_MUX0_CFG1, 0x00},
>>>>       { CDC_TX_INP_MUX_ADC_MUX1_CFG0, 0x00},
>>>>
>> -- 
>> Qualcomm India Private Limited, on behalf of Qualcomm Innovation 
>> Center, Inc.,
>> is a member of Code Aurora Forum, a Linux Foundation Collaborative 
>> Project.
>>
-- 
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.,
is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.