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Date: Wed, 7 Jul 2021 11:26:17 +0530
From: Vijendar Mukunda <vijendar.mukunda@....com>
To: <broonie@...nel.org>, <alsa-devel@...a-project.org>
CC: <Alexander.Deucher@....com>, <Sunil-kumar.Dommati@....com>,
"Vijendar Mukunda" <vijendar.mukunda@....com>,
Vijendar Mukunda <Vijendar.Mukunda@....com>,
Liam Girdwood <lgirdwood@...il.com>,
"Jaroslav Kysela" <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
open list <linux-kernel@...r.kernel.org>
Subject: [PATCH 06/12] ASoC: amd: irq handler changes for ACP5x PCM dma driver
Whenever audio data equal to the I2S FIFO watermark level are
produced/consumed, interrupt is generated.
Acknowledge the interrupt.
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
sound/soc/amd/vangogh/acp5x-pcm-dma.c | 62 +++++++++++++++++++++++++++
sound/soc/amd/vangogh/acp5x.h | 9 ++++
2 files changed, 71 insertions(+)
diff --git a/sound/soc/amd/vangogh/acp5x-pcm-dma.c b/sound/soc/amd/vangogh/acp5x-pcm-dma.c
index efcf01eb89ae..d79712587d30 100644
--- a/sound/soc/amd/vangogh/acp5x-pcm-dma.c
+++ b/sound/soc/amd/vangogh/acp5x-pcm-dma.c
@@ -21,10 +21,58 @@ static const struct snd_soc_component_driver acp5x_i2s_component = {
.name = DRV_NAME,
};
+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)
+ return IRQ_HANDLED;
+ else
+ return IRQ_NONE;
+}
+
static int acp5x_audio_probe(struct platform_device *pdev)
{
struct resource *res;
struct i2s_dev_data *adata;
+ unsigned int irqflags;
int status;
if (!pdev->dev.platform_data) {
@@ -47,6 +95,14 @@ static int acp5x_audio_probe(struct platform_device *pdev)
resource_size(res));
if (!adata->acp5x_base)
return -ENOMEM;
+
+ 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;
dev_set_drvdata(&pdev->dev, adata);
status = devm_snd_soc_register_component(&pdev->dev,
&acp5x_i2s_component,
@@ -55,6 +111,12 @@ static int acp5x_audio_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "Fail to register acp i2s component\n");
return -ENODEV;
}
+ status = devm_request_irq(&pdev->dev, adata->i2s_irq, i2s_irq_handler,
+ irqflags, "ACP5x_I2S_IRQ", adata);
+ if (status) {
+ dev_err(&pdev->dev, "ACP5x I2S IRQ request failed\n");
+ return -ENODEV;
+ }
return 0;
}
diff --git a/sound/soc/amd/vangogh/acp5x.h b/sound/soc/amd/vangogh/acp5x.h
index eca642614b4f..44662e54bd34 100644
--- a/sound/soc/amd/vangogh/acp5x.h
+++ b/sound/soc/amd/vangogh/acp5x.h
@@ -31,9 +31,18 @@
#define ACP5x_HS_TDM_REG_END 0x1242824
#define I2S_MODE 0x00
#define ACP5x_I2S_MODE 0x00
+#define I2S_RX_THRESHOLD 27
+#define I2S_TX_THRESHOLD 28
+#define HS_TX_THRESHOLD 24
+#define HS_RX_THRESHOLD 23
struct i2s_dev_data {
+ unsigned int i2s_irq;
void __iomem *acp5x_base;
+ struct snd_pcm_substream *play_stream;
+ struct snd_pcm_substream *capture_stream;
+ struct snd_pcm_substream *i2ssp_play_stream;
+ struct snd_pcm_substream *i2ssp_capture_stream;
};
static inline u32 acp_readl(void __iomem *base_addr)
--
2.17.1
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