linux-kernel - Re: [PATCH 06/12] ASoC: amd: irq handler changes for ACP5x PCM dma driver

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Date:   Thu, 8 Jul 2021 19:02:25 +0530
From:   "Mukunda,Vijendar" <vijendar.mukunda@....com>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        broonie@...nel.org, alsa-devel@...a-project.org
Cc:     Sunil-kumar.Dommati@....com, Liam Girdwood <lgirdwood@...il.com>,
        open list <linux-kernel@...r.kernel.org>,
        Takashi Iwai <tiwai@...e.com>, Alexander.Deucher@....com
Subject: Re: [PATCH 06/12] ASoC: amd: irq handler changes for ACP5x PCM dma
 driver

On 7/7/21 9:50 PM, Pierre-Louis Bossart wrote:
> 
>> +static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
>> +{
>> +	struct i2s_dev_data *vg_i2s_data;
>> +	u16 play_flag, cap_flag;
>> +	u32 val;
>> +
>> +	vg_i2s_data = dev_id;
>> +	if (!vg_i2s_data)
>> +		return IRQ_NONE;
>> +
>> +	play_flag = 0;
>> +	cap_flag = 0;
>> +	val = acp_readl(vg_i2s_data->acp5x_base + ACP_EXTERNAL_INTR_STAT);
>> +	if ((val & BIT(HS_TX_THRESHOLD)) && vg_i2s_data->play_stream) {
>> +		acp_writel(BIT(HS_TX_THRESHOLD), vg_i2s_data->acp5x_base +
>> +			   ACP_EXTERNAL_INTR_STAT);
>> +		snd_pcm_period_elapsed(vg_i2s_data->play_stream);
>> +		play_flag = 1;
>> +	}
>> +	if ((val & BIT(I2S_TX_THRESHOLD)) &&
>> +	    vg_i2s_data->i2ssp_play_stream) {
>> +		acp_writel(BIT(I2S_TX_THRESHOLD),
>> +			   vg_i2s_data->acp5x_base + ACP_EXTERNAL_INTR_STAT);
>> +		snd_pcm_period_elapsed(vg_i2s_data->i2ssp_play_stream);
>> +		play_flag = 1;
>> +	}
>> +
>> +	if ((val & BIT(HS_RX_THRESHOLD)) && vg_i2s_data->capture_stream) {
>> +		acp_writel(BIT(HS_RX_THRESHOLD), vg_i2s_data->acp5x_base +
>> +			   ACP_EXTERNAL_INTR_STAT);
>> +		snd_pcm_period_elapsed(vg_i2s_data->capture_stream);
>> +		cap_flag = 1;
>> +	}
>> +	if ((val & BIT(I2S_RX_THRESHOLD)) &&
>> +	    vg_i2s_data->i2ssp_capture_stream) {
>> +		acp_writel(BIT(I2S_RX_THRESHOLD),
>> +			   vg_i2s_data->acp5x_base + ACP_EXTERNAL_INTR_STAT);
>> +		snd_pcm_period_elapsed(vg_i2s_data->i2ssp_capture_stream);
>> +		cap_flag = 1;
>> +	}
>> +
>> +	if (play_flag | cap_flag)
> 
> it doesn't seem terribly useful to use two variables if you can use one?

Agreed. Will fix it and post the new version.
> 
>> +		return IRQ_HANDLED;
>> +	else
>> +		return IRQ_NONE;
>> +}
>> +
>