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Message-ID: <20230612095903.2113464-6-Vijendar.Mukunda@amd.com>
Date: Mon, 12 Jun 2023 15:28:59 +0530
From: Vijendar Mukunda <Vijendar.Mukunda@....com>
To: <broonie@...nel.org>
CC: <alsa-devel@...a-project.org>,
<pierre-louis.bossart@...ux.intel.com>,
<Basavaraj.Hiregoudar@....com>, <Sunil-kumar.Dommati@....com>,
<Mastan.Katragadda@....com>, <Arungopal.kondaveeti@....com>,
<mario.limonciello@....com>,
Vijendar Mukunda <Vijendar.Mukunda@....com>,
Liam Girdwood <lgirdwood@...il.com>,
Jaroslav Kysela <perex@...ex.cz>,
Takashi Iwai <tiwai@...e.com>,
Syed Saba Kareem <Syed.SabaKareem@....com>,
open list <linux-kernel@...r.kernel.org>
Subject: [PATCH V4 5/9] ASoC: amd: ps: add support for SoundWire DMA interrupts
Move to request_threaded_irq and use thread for handling
SoundWire DMA interrupts.
Whenever audio data equal to the SoundWire FIFO watermark level
are produced/consumed, interrupt is generated.
Acknowledge the interrupt and wake up the irq thread.
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
sound/soc/amd/ps/acp63.h | 18 +++++++++
sound/soc/amd/ps/pci-ps.c | 82 ++++++++++++++++++++++++++++++++++++++-
2 files changed, 98 insertions(+), 2 deletions(-)
diff --git a/sound/soc/amd/ps/acp63.h b/sound/soc/amd/ps/acp63.h
index 5f7ddcc31842..e96e6dc9d90f 100644
--- a/sound/soc/amd/ps/acp63.h
+++ b/sound/soc/amd/ps/acp63.h
@@ -165,6 +165,20 @@ enum acp_config {
ACP_CONFIG_15,
};
+enum amd_sdw0_channel {
+ ACP_SDW0_AUDIO0_TX = 0,
+ ACP_SDW0_AUDIO1_TX,
+ ACP_SDW0_AUDIO2_TX,
+ ACP_SDW0_AUDIO0_RX,
+ ACP_SDW0_AUDIO1_RX,
+ ACP_SDW0_AUDIO2_RX,
+};
+
+enum amd_sdw1_channel {
+ ACP_SDW1_AUDIO1_TX,
+ ACP_SDW1_AUDIO1_RX,
+};
+
struct pdm_stream_instance {
u16 num_pages;
u16 channels;
@@ -229,6 +243,8 @@ struct sdw_dma_ring_buf_reg {
* @sdw0_dev_index: SoundWire Manager-0 platform device index
* @sdw1_dev_index: SoundWire Manager-1 platform device index
* @sdw_dma_dev_index: SoundWire DMA controller platform device index
+ * @sdw0-dma_intr_stat: DMA interrupt status array for SoundWire manager-SW0 instance
+ * @sdw_dma_intr_stat: DMA interrupt status array for SoundWire manager-SW1 instance
* @acp_reset: flag set to true when bus reset is applied across all
* the active SoundWire manager instances
*/
@@ -246,6 +262,8 @@ struct acp63_dev_data {
u16 sdw0_dev_index;
u16 sdw1_dev_index;
u16 sdw_dma_dev_index;
+ u16 sdw0_dma_intr_stat[ACP63_SDW0_DMA_MAX_STREAMS];
+ u16 sdw1_dma_intr_stat[ACP63_SDW1_DMA_MAX_STREAMS];
bool acp_reset;
};
diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
index ac82dbe13351..ff734a90951b 100644
--- a/sound/soc/amd/ps/pci-ps.c
+++ b/sound/soc/amd/ps/pci-ps.c
@@ -99,14 +99,44 @@ static int acp63_deinit(void __iomem *acp_base, struct device *dev)
return 0;
}
+static irqreturn_t acp63_irq_thread(int irq, void *context)
+{
+ struct sdw_dma_dev_data *sdw_dma_data;
+ struct acp63_dev_data *adata = context;
+ u32 stream_index;
+ u16 pdev_index;
+
+ pdev_index = adata->sdw_dma_dev_index;
+ sdw_dma_data = dev_get_drvdata(&adata->pdev[pdev_index]->dev);
+
+ for (stream_index = 0; stream_index < ACP63_SDW0_DMA_MAX_STREAMS; stream_index++) {
+ if (adata->sdw0_dma_intr_stat[stream_index]) {
+ if (sdw_dma_data->sdw0_dma_stream[stream_index])
+ snd_pcm_period_elapsed(sdw_dma_data->sdw0_dma_stream[stream_index]);
+ adata->sdw0_dma_intr_stat[stream_index] = 0;
+ }
+ }
+ for (stream_index = 0; stream_index < ACP63_SDW1_DMA_MAX_STREAMS; stream_index++) {
+ if (adata->sdw1_dma_intr_stat[stream_index]) {
+ if (sdw_dma_data->sdw1_dma_stream[stream_index])
+ snd_pcm_period_elapsed(sdw_dma_data->sdw1_dma_stream[stream_index]);
+ adata->sdw1_dma_intr_stat[stream_index] = 0;
+ }
+ }
+ return IRQ_HANDLED;
+}
+
static irqreturn_t acp63_irq_handler(int irq, void *dev_id)
{
struct acp63_dev_data *adata;
struct pdm_dev_data *ps_pdm_data;
struct amd_sdw_manager *amd_manager;
u32 ext_intr_stat, ext_intr_stat1;
+ u32 stream_id = 0;
u16 irq_flag = 0;
+ u16 sdw_dma_irq_flag = 0;
u16 pdev_index;
+ u16 index;
adata = dev_id;
if (!adata)
@@ -153,6 +183,54 @@ static irqreturn_t acp63_irq_handler(int irq, void *dev_id)
snd_pcm_period_elapsed(ps_pdm_data->capture_stream);
irq_flag = 1;
}
+ if (ext_intr_stat & ACP_SDW_DMA_IRQ_MASK) {
+ for (index = ACP_AUDIO2_RX_THRESHOLD; index <= ACP_AUDIO0_TX_THRESHOLD; index++) {
+ if (ext_intr_stat & BIT(index)) {
+ writel(BIT(index), adata->acp63_base + ACP_EXTERNAL_INTR_STAT);
+ switch (index) {
+ case ACP_AUDIO0_TX_THRESHOLD:
+ stream_id = ACP_SDW0_AUDIO0_TX;
+ break;
+ case ACP_AUDIO1_TX_THRESHOLD:
+ stream_id = ACP_SDW0_AUDIO1_TX;
+ break;
+ case ACP_AUDIO2_TX_THRESHOLD:
+ stream_id = ACP_SDW0_AUDIO2_TX;
+ break;
+ case ACP_AUDIO0_RX_THRESHOLD:
+ stream_id = ACP_SDW0_AUDIO0_RX;
+ break;
+ case ACP_AUDIO1_RX_THRESHOLD:
+ stream_id = ACP_SDW0_AUDIO1_RX;
+ break;
+ case ACP_AUDIO2_RX_THRESHOLD:
+ stream_id = ACP_SDW0_AUDIO2_RX;
+ break;
+ }
+
+ adata->sdw0_dma_intr_stat[stream_id] = 1;
+ sdw_dma_irq_flag = 1;
+ }
+ }
+ }
+
+ if (ext_intr_stat1 & ACP_P1_AUDIO1_RX_THRESHOLD) {
+ writel(ACP_P1_AUDIO1_RX_THRESHOLD,
+ adata->acp63_base + ACP_EXTERNAL_INTR_STAT1);
+ adata->sdw1_dma_intr_stat[ACP_SDW1_AUDIO1_RX] = 1;
+ sdw_dma_irq_flag = 1;
+ }
+
+ if (ext_intr_stat1 & ACP_P1_AUDIO1_TX_THRESHOLD) {
+ writel(ACP_P1_AUDIO1_TX_THRESHOLD,
+ adata->acp63_base + ACP_EXTERNAL_INTR_STAT1);
+ adata->sdw1_dma_intr_stat[ACP_SDW1_AUDIO1_TX] = 1;
+ sdw_dma_irq_flag = 1;
+ }
+
+ if (sdw_dma_irq_flag)
+ return IRQ_WAKE_THREAD;
+
if (irq_flag)
return IRQ_HANDLED;
else
@@ -553,8 +631,8 @@ static int snd_acp63_probe(struct pci_dev *pci,
ret = acp63_init(adata->acp63_base, &pci->dev);
if (ret)
goto release_regions;
- ret = devm_request_irq(&pci->dev, pci->irq, acp63_irq_handler,
- irqflags, "ACP_PCI_IRQ", adata);
+ ret = devm_request_threaded_irq(&pci->dev, pci->irq, acp63_irq_handler,
+ acp63_irq_thread, irqflags, "ACP_PCI_IRQ", adata);
if (ret) {
dev_err(&pci->dev, "ACP PCI IRQ request failed\n");
goto de_init;
--
2.34.1
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