linux-kernel - Re: [PATCH 06/13] ASoC: amd: add acp6x irq handler

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Date:   Mon, 11 Oct 2021 14:58:32 +0530
From:   "Mukunda,Vijendar" <vijendar.mukunda@....com>
To:     Joe Perches <joe@...ches.com>, broonie@...nel.org,
        alsa-devel@...a-project.org
Cc:     Alexander.Deucher@....com, Basavaraj.Hiregoudar@....com,
        Sunil-kumar.Dommati@....com, Mario.Limonciello@....com,
        Richard.Gong@....com, Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/13] ASoC: amd: add acp6x irq handler

On 10/11/21 2:28 PM, Joe Perches wrote:
> On Mon, 2021-10-11 at 11:26 +0530, Vijendar Mukunda wrote:
>> Add ACP6x irq handler for handling irq events for ACP IP.
>> Add pdm irq events handling.
>> Whenever audio data equal to the PDM watermark level are consumed,
>> interrupt is generated. Acknowledge the interrupt.
> 
>> diff --git a/sound/soc/amd/yc/pci-acp6x.c b/sound/soc/amd/yc/pci-acp6x.c
> []
>> @@ -116,6 +118,33 @@ static int acp6x_deinit(void __iomem *acp_base)
>>  	return 0;
>>  }
>>
>> +static irqreturn_t acp6x_irq_handler(int irq, void *dev_id)
>> +{
>> +	struct acp6x_dev_data *adata;
>> +	struct pdm_dev_data *yc_pdm_data;
>> +	u16 irq_flag;
> 
> irq_flag seems unnecessary.
> 
>> +	u32 val;
>> +
>> +	adata = dev_id;
>> +	if (!adata)
>> +		return IRQ_NONE;
>> +
>> +	irq_flag = 0;
>> +	val = acp6x_readl(adata->acp6x_base + ACP_EXTERNAL_INTR_STAT);
>> +	if (val & BIT(PDM_DMA_STAT)) {
>> +		yc_pdm_data = dev_get_drvdata(&adata->pdev[0]->dev);
>> +		acp6x_writel(BIT(PDM_DMA_STAT), adata->acp6x_base + ACP_EXTERNAL_INTR_STAT);
>> +		if (yc_pdm_data->capture_stream)
>> +			snd_pcm_period_elapsed(yc_pdm_data->capture_stream);
>> +		irq_flag = 1;
> 
> Could be:
> 
> 		return IRQ_HANDLED;
  will fix it and post the new version.
> 
>> +	}
>> +
>> +	if (irq_flag)
>> +		return IRQ_HANDLED;
>> +	else
>> +		return IRQ_NONE;
> 
> and
> 	return IRQ_NONE;
> 
>> +}
> 
>