@@ -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;
}
@@ -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;
};
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> --- sound/soc/amd/renoir/acp3x-pdm-dma.c | 38 ++++++++++++++++++++++++++++ sound/soc/amd/renoir/rn_acp3x.h | 2 ++ 2 files changed, 40 insertions(+)