Re: [PATCH v3 3/8] ASoC: qcom: lpass: Use regmap_field for i2sctl and dmactl registers

[Rohit Kumar <rohitkr@codeaurora.org>]

On 7/9/2020 3:36 PM, Srinivas Kandagatla wrote:
>
>
> On 09/07/2020 10:57, Rohit Kumar wrote:
>> Thanks Srini for reviewing.
>>
>> On 7/9/2020 2:56 PM, Srinivas Kandagatla wrote:
>>>
>>>
>>> On 08/07/2020 06:08, Rohit kumar wrote:
>>>> I2SCTL and DMACTL registers has different bits alignment for newer
>>>> LPASS variants of SC7180 soc. Use REG_FIELD_ID() to define the
>>>> reg_fields in platform specific file and removed shifts and mask
>>>> macros for such registers from header file.
>>>>
>>>> Signed-off-by: Rohit kumar <rohitkr@codeaurora.org>
>>>
>>> Thanks Rohit for doing this, this looks much better now!
>>> I have few minor comments..
>>>
>>>> ---
>>>>   sound/soc/qcom/lpass-apq8016.c   |  24 ++++++
>>>>   sound/soc/qcom/lpass-cpu.c       | 163 
>>>> +++++++++++++++++++++++----------------
>>>>   sound/soc/qcom/lpass-ipq806x.c   |  24 ++++++
>>>>   sound/soc/qcom/lpass-lpaif-reg.h | 157 
>>>> +++++++++++++++++++------------------
>>>>   sound/soc/qcom/lpass-platform.c  | 151 
>>>> +++++++++++++++++++++++++++---------
>>>>   sound/soc/qcom/lpass.h           |  53 +++++++++++++
>>>>   6 files changed, 398 insertions(+), 174 deletions(-)
>>>>
>>>
>>> index f0c7e93..f358d12 100644
>>>> --- a/sound/soc/qcom/lpass-cpu.c
>>>> +++ b/sound/soc/qcom/lpass-cpu.c
>>>> @@ -29,6 +29,32 @@
>>>>   #define LPASS_CPU_I2S_SD0_1_2_MASK    GENMASK(2, 0)
>>>>   #define LPASS_CPU_I2S_SD0_1_2_3_MASK    GENMASK(3, 0)
>>>
>>>
>>>>   }
>>>>   -static int lpass_cpu_daiops_hw_free(struct snd_pcm_substream 
>>>> *substream,
>>>> -        struct snd_soc_dai *dai)
>>>> -{
>>>> -    struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
>>>> -    int ret;
>>>> -
>>>> -    ret = regmap_write(drvdata->lpaif_map,
>>>> -               LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
>>>> -               0);
>>>> -    if (ret)
>>>> -        dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
>>>> -
>>>> -    return ret;
>>>> -}
>>>
>>> Any particular reason why this function remove
>>
>> This was causing issue in playback/capture concurrency. It sets 
>> I2SCTL register value to 0
>>
>> when usecase ends. However, playback/capture specific bits are 
>> already cleared during trigger() stop
>>
>> function. So, this is not needed.
>
> This should be sent as separate fix with fixes tag!
Ok. Will create separate patch with fixes tag and post.
>
>>
>>
>>>
>>>> diff --git a/sound/soc/qcom/lpass-lpaif-reg.h 
>>>> b/sound/soc/qcom/lpass-lpaif-reg.h
>>>> index 72a3e2f..5258e60 100644
>>>> --- a/sound/soc/qcom/lpass-lpaif-reg.h
>>>> +++ b/sound/soc/qcom/lpass-lpaif-reg.h
>>>> @@ -12,15 +12,12 @@
>>> ...
>>>>   #endif /* __LPASS_LPAIF_REG_H__ */
>>>> diff --git a/sound/soc/qcom/lpass-platform.c 
>>>> b/sound/soc/qcom/lpass-platform.c
>>>> index 34f7fd1..445ca193 100644
>>>> --- a/sound/soc/qcom/lpass-platform.c
>>>> +++ b/sound/soc/qcom/lpass-platform.c
>>>> @@ -50,6 +50,53 @@ static const struct snd_pcm_hardware 
>>>> lpass_platform_pcm_hardware = {
>>>>       .fifo_size        =    0,
>>>>   };
>>> ...
>>>>   static int lpass_platform_pcmops_open(struct snd_soc_component 
>>>> *component,
>>>>                         struct snd_pcm_substream *substream)
>>>>   {
>>>> @@ -59,9 +106,9 @@ static int lpass_platform_pcmops_open(struct 
>>>> snd_soc_component *component,
>>>>       struct lpass_data *drvdata = 
>>>> snd_soc_component_get_drvdata(component);
>>>>       struct lpass_variant *v = drvdata->variant;
>>>>       int ret, dma_ch, dir = substream->stream;
>>>> -    struct lpass_pcm_data *data;
>>>> +    struct lpass_pcm_data *data = NULL;
>>>>   -    data = devm_kzalloc(soc_runtime->dev, sizeof(*data), 
>>>> GFP_KERNEL);
>>>> +    data = kzalloc(sizeof(*data), GFP_KERNEL);
>>>
>>> Does this change belong in this patch?
>>
>>
>> As part of this change, I fixed memory leak too by adding kfree() in 
>> close()
>>
>> However, this was causing issue as memory was allocated using 
>> devm_kzalloc().
>>
>> Should I move it to different patch?
>
> That would be the right thing to do, can also add fixes tag!


Sure, Will do that in next spin.

>
>
>>
>>>
>>>>       if (!data)
>>>>           return -ENOMEM;
>>>>   @@ -111,13 +158,13 @@ static int 
>>>> lpass_platform_pcmops_close(struct snd_soc_component *component,
>>>>       struct snd_pcm_runtime *runtime = substream->runtime;
>>>>       struct lpass_data *drvdata = 
>>>> snd_soc_component_get_drvdata(component);
>>>>       struct lpass_variant *v = drvdata->variant;
>
>>>
>>> Above two along with rddma members can be removed, these become 
>>> redundant after adding regmap field!
>>>
>> wrdma_channels is used in alloc_dma_channel() to get the channel id.
>>
>> Also, both are used for other DMA registers such as LPAIF_RDMABASE_REG,
>>
>> LPAIF_RDMABUFF_REG, LPAIF_RDMACURR_REG, etc.
>>
> Ah I see we are still using this in lpass_cpu_regmap_writeable!
> ignore my previous comments about removing them!
>
> --srini

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