linux-kernel - Re: [PATCH V3 9/9] ASoC: amd: ps: Add SoundWire specific checks in pci driver in pm ops.

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Message-ID: <38044626-ec8d-7841-01dc-f062eff8451a@amd.com>
Date:   Wed, 7 Jun 2023 12:29:12 +0530
From:   "Mukunda,Vijendar" <vijendar.mukunda@....com>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        broonie@...nel.org
Cc:     alsa-devel@...a-project.org, Basavaraj.Hiregoudar@....com,
        Sunil-kumar.Dommati@....com, Mastan.Katragadda@....com,
        Arungopal.kondaveeti@....com, mario.limonciello@....com,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Syed Saba Kareem <Syed.SabaKareem@....com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V3 9/9] ASoC: amd: ps: Add SoundWire specific checks in
 pci driver in pm ops.

On 06/06/23 20:36, Pierre-Louis Bossart wrote:
>
> On 6/6/23 01:07, Vijendar Mukunda wrote:
>> AMD SoundWire manager supports different power modes.
>> In case of SoundWire Power off Mode, ACP pci parent driver
>> should invoke acp de-init and init sequence during suspend/resume
>> callbacks.
>>
>> Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
>> ---
>>  sound/soc/amd/ps/pci-ps.c | 18 ++++++++++++++----
>>  1 file changed, 14 insertions(+), 4 deletions(-)
>>
>> diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
>> index daf54fe9cafd..5802a701b3b1 100644
>> --- a/sound/soc/amd/ps/pci-ps.c
>> +++ b/sound/soc/amd/ps/pci-ps.c
>> @@ -662,10 +662,15 @@ static int snd_acp63_probe(struct pci_dev *pci,
>>  static int __maybe_unused snd_acp63_suspend(struct device *dev)
>>  {
>>  	struct acp63_dev_data *adata;
>> -	int ret;
>> +	int ret = 0;
>>  
>>  	adata = dev_get_drvdata(dev);
>> -	ret = acp63_deinit(adata->acp63_base, dev);
>> +	if (adata->pdev_mask & ACP63_SDW_DEV_MASK) {
> And now back to my comment from the first patch, you are using a
> bit-wise operation with an enum which is not explicitly defined as a
> mask. This test would be true for ACP63_SDW_PDM_DEV_MASK as well.
Already provided explanation for the same , in patch 1 review
comments. Please refer that one.
>
> +enum acp_pdev_mask {
> +	ACP63_PDM_DEV_MASK = 1,
> +	ACP63_SDW_DEV_MASK,
> +	ACP63_SDW_PDM_DEV_MASK,
> +};
>
>> +		if (adata->acp_reset)
>> +			ret = acp63_deinit(adata->acp63_base, dev);
>> +	} else {
>> +		ret = acp63_deinit(adata->acp63_base, dev);
>> +	}
>>  	if (ret)
>>  		dev_err(dev, "ACP de-init failed\n");
>>  	return ret;
>> @@ -674,10 +679,15 @@ static int __maybe_unused snd_acp63_suspend(struct device *dev)
>>  static int __maybe_unused snd_acp63_resume(struct device *dev)
>>  {
>>  	struct acp63_dev_data *adata;
>> -	int ret;
>> +	int ret = 0;
>>  
>>  	adata = dev_get_drvdata(dev);
>> -	ret = acp63_init(adata->acp63_base, dev);
>> +	if (adata->pdev_mask & ACP63_SDW_DEV_MASK) {
>> +		if (adata->acp_reset)
>> +			ret = acp63_init(adata->acp63_base, dev);
>> +	} else {
>> +		ret = acp63_init(adata->acp63_base, dev);
>> +	}
>>  	if (ret)
>>  		dev_err(dev, "ACP init failed\n");
>>  	return ret;