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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: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200518171704.24999-7-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Vijendar Mukunda 2020-05-19 01:16:56 +08:00 committed by Mark Brown
parent f621a3676d
commit b9901654a9
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 40 additions and 0 deletions
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38
sound/soc/amd/renoir/acp3x-pdm-dma.c
View File

@ -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;
}

2
sound/soc/amd/renoir/rn_acp3x.h
View File

@ -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;
};