[PATCH] ASoC: amd: acp: Add TDM support for acp i2s stream
Venkata Prasad Potturu
venkataprasad.potturu at amd.com
Mon Aug 1 20:03:23 CEST 2022
Add callback and code changes to enable ACP I2S controller in TDM
mode. Add new fields in acp_stream and acp_dev_data struct to configure
tdm related registers for ACP i2s controllers.
Signed-off-by: Venkata Prasad Potturu <venkataprasad.potturu at amd.com>
---
Depends on:-
-- https://patchwork.kernel.org/project/alsa-devel/patch/20220728124057.54259-1-venkataprasad.potturu@amd.com/
sound/soc/amd/acp/acp-i2s.c | 78 ++++++++++++++++++++++++++++++++++++-
sound/soc/amd/acp/amd.h | 12 ++++++
2 files changed, 89 insertions(+), 1 deletion(-)
diff --git a/sound/soc/amd/acp/acp-i2s.c b/sound/soc/amd/acp/acp-i2s.c
index 393f729ef561..b1257923b225 100644
--- a/sound/soc/amd/acp/acp-i2s.c
+++ b/sound/soc/amd/acp/acp-i2s.c
@@ -25,6 +25,63 @@
#define DRV_NAME "acp_i2s_playcap"
+static int acp_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
+ unsigned int fmt)
+{
+ struct acp_dev_data *adata = snd_soc_dai_get_drvdata(cpu_dai);
+ int mode;
+
+ mode = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
+ switch (mode) {
+ case SND_SOC_DAIFMT_I2S:
+ adata->tdm_mode = TDM_DISABLE;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ adata->tdm_mode = TDM_ENABLE;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int acp_i2s_set_tdm_slot(struct snd_soc_dai *dai, u32 tx_mask, u32 rx_mask,
+ int slots, int slot_width)
+{
+ struct device *dev = dai->component->dev;
+ struct acp_dev_data *adata = snd_soc_dai_get_drvdata(dai);
+ struct acp_stream *stream;
+ int slot_len;
+
+ switch (slot_width) {
+ case SLOT_WIDTH_8:
+ slot_len = 8;
+ break;
+ case SLOT_WIDTH_16:
+ slot_len = 16;
+ break;
+ case SLOT_WIDTH_24:
+ slot_len = 24;
+ break;
+ case SLOT_WIDTH_32:
+ slot_len = 0;
+ break;
+ default:
+ dev_err(dev, "Unsupported bitdepth %d\n", slot_width);
+ return -EINVAL;
+ }
+
+ list_for_each_entry(stream, &adata->stream_list, list) {
+ if (tx_mask && stream->dir == SNDRV_PCM_STREAM_PLAYBACK)
+ adata->tdm_tx_fmt[stream->dai_id - 1] =
+ FRM_LEN | (slots << 15) | (slot_len << 18);
+ else if (rx_mask && stream->dir == SNDRV_PCM_STREAM_CAPTURE)
+ adata->tdm_rx_fmt[stream->dai_id - 1] =
+ FRM_LEN | (slots << 15) | (slot_len << 18);
+ }
+ return 0;
+}
+
static int acp_i2s_hwparams(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
@@ -33,7 +90,7 @@ static int acp_i2s_hwparams(struct snd_pcm_substream *substream, struct snd_pcm_
struct acp_resource *rsrc;
u32 val;
u32 xfer_resolution;
- u32 reg_val;
+ u32 reg_val, fmt_reg, tdm_fmt;
u32 lrclk_div_val, bclk_div_val;
adata = snd_soc_dai_get_drvdata(dai);
@@ -62,12 +119,15 @@ static int acp_i2s_hwparams(struct snd_pcm_substream *substream, struct snd_pcm_
switch (dai->driver->id) {
case I2S_BT_INSTANCE:
reg_val = ACP_BTTDM_ITER;
+ fmt_reg = ACP_BTTDM_TXFRMT;
break;
case I2S_SP_INSTANCE:
reg_val = ACP_I2STDM_ITER;
+ fmt_reg = ACP_I2STDM_TXFRMT;
break;
case I2S_HS_INSTANCE:
reg_val = ACP_HSTDM_ITER;
+ fmt_reg = ACP_HSTDM_TXFRMT;
break;
default:
dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
@@ -77,12 +137,15 @@ static int acp_i2s_hwparams(struct snd_pcm_substream *substream, struct snd_pcm_
switch (dai->driver->id) {
case I2S_BT_INSTANCE:
reg_val = ACP_BTTDM_IRER;
+ fmt_reg = ACP_BTTDM_RXFRMT;
break;
case I2S_SP_INSTANCE:
reg_val = ACP_I2STDM_IRER;
+ fmt_reg = ACP_I2STDM_RXFRMT;
break;
case I2S_HS_INSTANCE:
reg_val = ACP_HSTDM_IRER;
+ fmt_reg = ACP_HSTDM_RXFRMT;
break;
default:
dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
@@ -95,6 +158,16 @@ static int acp_i2s_hwparams(struct snd_pcm_substream *substream, struct snd_pcm_
val = val | (xfer_resolution << 3);
writel(val, adata->acp_base + reg_val);
+ if (adata->tdm_mode) {
+ val = readl(adata->acp_base + reg_val);
+ writel(val | BIT(1), adata->acp_base + reg_val);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ tdm_fmt = adata->tdm_tx_fmt[dai->driver->id - 1];
+ else
+ tdm_fmt = adata->tdm_rx_fmt[dai->driver->id - 1];
+ writel(tdm_fmt, adata->acp_base + fmt_reg);
+ }
+
if (rsrc->soc_mclk) {
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
@@ -443,6 +516,7 @@ static int acp_i2s_startup(struct snd_pcm_substream *substream, struct snd_soc_d
stream->id = dai->driver->id + dir;
stream->dai_id = dai->driver->id;
stream->irq_bit = irq_bit;
+ stream->dir = substream->stream;
return 0;
}
@@ -452,6 +526,8 @@ const struct snd_soc_dai_ops asoc_acp_cpu_dai_ops = {
.hw_params = acp_i2s_hwparams,
.prepare = acp_i2s_prepare,
.trigger = acp_i2s_trigger,
+ .set_fmt = acp_i2s_set_fmt,
+ .set_tdm_slot = acp_i2s_set_tdm_slot,
};
EXPORT_SYMBOL_NS_GPL(asoc_acp_cpu_dai_ops, SND_SOC_ACP_COMMON);
diff --git a/sound/soc/amd/acp/amd.h b/sound/soc/amd/acp/amd.h
index be8bb8247c4e..5f2119f42271 100644
--- a/sound/soc/amd/acp/amd.h
+++ b/sound/soc/amd/acp/amd.h
@@ -84,6 +84,14 @@
#define ACP_MAX_STREAM 8
+#define TDM_ENABLE 1
+#define TDM_DISABLE 0
+
+#define SLOT_WIDTH_8 0x8
+#define SLOT_WIDTH_16 0x10
+#define SLOT_WIDTH_24 0x18
+#define SLOT_WIDTH_32 0x20
+
struct acp_chip_info {
char *name; /* Platform name */
unsigned int acp_rev; /* ACP Revision id */
@@ -96,6 +104,7 @@ struct acp_stream {
int irq_bit;
int dai_id;
int id;
+ int dir;
u64 bytescount;
u32 reg_offset;
u32 pte_offset;
@@ -120,6 +129,7 @@ struct acp_dev_data {
void __iomem *acp_base;
unsigned int i2s_irq;
+ bool tdm_mode;
/* SOC specific dais */
struct snd_soc_dai_driver *dai_driver;
int num_dai;
@@ -134,6 +144,8 @@ struct acp_dev_data {
u32 lrclk_div;
struct acp_resource *rsrc;
+ u32 tdm_tx_fmt[3];
+ u32 tdm_rx_fmt[3];
};
union acp_i2stdm_mstrclkgen {
--
2.25.1
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