From: Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@xxxxxxx>
whenever audio data equal to I2S fifo watermark level is
produced/consumed, interrupt is generated. Amount of data is equal to
half of ALSA ring buffer size. Acknowledge the interrupt.
Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
sound/soc/amd/raven/acp3x-pcm-dma.c | 49 +++++++++++++++++++++++++++++++++++++
1 file changed, 49 insertions(+)
diff --git a/sound/soc/amd/raven/acp3x-pcm-dma.c b/sound/soc/amd/raven/acp3x-pcm-dma.c
index 3fd9f86..0ce04f0 100644
--- a/sound/soc/amd/raven/acp3x-pcm-dma.c
+++ b/sound/soc/amd/raven/acp3x-pcm-dma.c
@@ -25,6 +25,7 @@
#include "acp3x.h"
struct i2s_dev_data {
+ unsigned int i2s_irq;
void __iomem *acp3x_base;
struct snd_pcm_substream *play_stream;
struct snd_pcm_substream *capture_stream;
@@ -135,6 +136,38 @@ static int acp3x_deinit(void __iomem *acp3x_base)
return 0;
}
+static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
+{
+ u16 play_flag, cap_flag;
+ u32 val;
+ struct i2s_dev_data *rv_i2s_data = dev_id;
+
+ if (rv_i2s_data == NULL)
+ return IRQ_NONE;
+
+ play_flag = cap_flag = 0;
+
+ val = rv_readl(rv_i2s_data->acp3x_base + mmACP_EXTERNAL_INTR_STAT);
+ if ((val & BIT(BT_TX_THRESHOLD)) && (rv_i2s_data->play_stream)) {
+ rv_writel(BIT(BT_TX_THRESHOLD), rv_i2s_data->acp3x_base +
+ mmACP_EXTERNAL_INTR_STAT);
+ snd_pcm_period_elapsed(rv_i2s_data->play_stream);
+ play_flag = 1;
+ }
+
+ if ((val & BIT(BT_RX_THRESHOLD)) && rv_i2s_data->capture_stream) {
+ rv_writel(BIT(BT_RX_THRESHOLD), rv_i2s_data->acp3x_base +
+ mmACP_EXTERNAL_INTR_STAT);
+ snd_pcm_period_elapsed(rv_i2s_data->capture_stream);
+ cap_flag = 1;
+ }
+
+ if (play_flag | cap_flag)
+ return IRQ_HANDLED;
+ else
+ return IRQ_NONE;
+}
+
static struct snd_pcm_ops acp3x_dma_ops = {
.open = NULL,
.close = NULL,
@@ -211,6 +244,13 @@ static int acp3x_audio_probe(struct platform_device *pdev)
adata->acp3x_base = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "IORESOURCE_IRQ FAILED\n");
+ return -ENODEV;
+ }
+
+ adata->i2s_irq = res->start;
adata->play_stream = NULL;
adata->capture_stream = NULL;
@@ -234,6 +274,15 @@ static int acp3x_audio_probe(struct platform_device *pdev)
goto dev_err;
}
+ status = devm_request_irq(&pdev->dev, adata->i2s_irq, i2s_irq_handler,
+ irqflags, "ACP3x_I2S_IRQ", adata);
+ if (status) {
+ dev_err(&pdev->dev, "ACP3x I2S IRQ request failed\n");
+ snd_soc_unregister_platform(&pdev->dev);
+ snd_soc_unregister_component(&pdev->dev);
+ goto dev_err;
+ }
+
return 0;
dev_err:
status = acp3x_deinit(adata->acp3x_base);
--
2.5.5
