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

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Date:   Wed, 7 Jul 2021 11:20:31 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Vijendar Mukunda <vijendar.mukunda@....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


> +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?

> +		return IRQ_HANDLED;
> +	else
> +		return IRQ_NONE;
> +}
> +