Unverified Commit b9901654 authored by Vijendar Mukunda's avatar Vijendar Mukunda Committed by Mark Brown
Browse files

ASoC: amd: irq handler changes for ACP3x PDM dma driver 



Whenever audio data equal to the PDM watermark level
are consumed, interrupt is generated.
Acknowledge the interrupt.

Signed-off-by: default avatarVijendar Mukunda <Vijendar.Mukunda@amd.com>
Reviewed-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200518171704.24999-7-Vijendar.Mukunda@amd.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent f621a367

sound/soc/amd/renoir/acp3x-pdm-dma.c

+38 −0
Original line number Diff line number Diff line
@@ -16,6 +16,31 @@ 


#define DRV_NAME "acp_rn_pdm_dma"



static irqreturn_t pdm_irq_handler(int irq, void *dev_id)

{

	struct pdm_dev_data *rn_pdm_data;

	u16 cap_flag;

	u32 val;



	rn_pdm_data = dev_id;

	if (!rn_pdm_data)

		return IRQ_NONE;



	cap_flag = 0;

	val = rn_readl(rn_pdm_data->acp_base + ACP_EXTERNAL_INTR_STAT);

	if ((val & BIT(PDM_DMA_STAT)) && rn_pdm_data->capture_stream) {

		rn_writel(BIT(PDM_DMA_STAT), rn_pdm_data->acp_base +

			  ACP_EXTERNAL_INTR_STAT);

		snd_pcm_period_elapsed(rn_pdm_data->capture_stream);

		cap_flag = 1;

	}



	if (cap_flag)

		return IRQ_HANDLED;

	else

		return IRQ_NONE;

}



static struct snd_soc_dai_driver acp_pdm_dai_driver = {

	.capture = {

		.rates = SNDRV_PCM_RATE_48000,
@@ -60,6 +85,13 @@ static int acp_pdm_audio_probe(struct platform_device *pdev) 
	if (!adata->acp_base)

		return -ENOMEM;



	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);

	if (!res) {

		dev_err(&pdev->dev, "IORESOURCE_IRQ FAILED\n");

		return -ENODEV;

	}



	adata->pdm_irq = res->start;

	adata->capture_stream = NULL;



	dev_set_drvdata(&pdev->dev, adata);
@@ -71,6 +103,12 @@ static int acp_pdm_audio_probe(struct platform_device *pdev) 


		return -ENODEV;

	}

	status = devm_request_irq(&pdev->dev, adata->pdm_irq, pdm_irq_handler,

				  irqflags, "ACP_PDM_IRQ", adata);

	if (status) {

		dev_err(&pdev->dev, "ACP PDM IRQ request failed\n");

		return -ENODEV;

	}

	return 0;

}

sound/soc/amd/renoir/rn_acp3x.h

+2 −0
Original line number Diff line number Diff line
@@ -28,8 +28,10 @@ 


#define ACP_ERROR_MASK 0x20000000

#define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF

#define PDM_DMA_STAT 0x10



struct pdm_dev_data {

	u32 pdm_irq;

	void __iomem *acp_base;

	struct snd_pcm_substream *capture_stream;

};