From: Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@xxxxxxx>
ACP3x I2S (CPU DAI) can act in normal I2S and TDM modes. Added support
for TDM mode. Desired mode can be selected from ASoC machine driver.
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 | 63 ++++++++++++++++++++++++++++++++++++-
sound/soc/amd/raven/acp3x.h | 1 +
2 files changed, 63 insertions(+), 1 deletion(-)
diff --git a/sound/soc/amd/raven/acp3x-pcm-dma.c b/sound/soc/amd/raven/acp3x-pcm-dma.c
index 5e589dc..f62bb7f 100644
--- a/sound/soc/amd/raven/acp3x-pcm-dma.c
+++ b/sound/soc/amd/raven/acp3x-pcm-dma.c
@@ -25,7 +25,9 @@
#include "acp3x.h"
struct i2s_dev_data {
+ bool tdm_mode;
unsigned int i2s_irq;
+ u32 tdm_fmt;
void __iomem *acp3x_base;
struct snd_pcm_substream *play_stream;
struct snd_pcm_substream *capture_stream;
@@ -35,7 +37,6 @@ struct i2s_stream_instance {
u16 num_pages;
u16 channels;
u32 xfer_resolution;
- u32 fmt;
u32 val;
struct page *pg;
void __iomem *acp3x_base;
@@ -436,6 +437,64 @@ static struct snd_soc_platform_driver acp3x_asoc_platform = {
.pcm_new = acp3x_dma_new,
};
+static int acp3x_dai_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
+{
+
+ struct i2s_dev_data *adata = snd_soc_dai_get_drvdata(cpu_dai);
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ adata->tdm_mode = false;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ adata->tdm_mode = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int acp3x_dai_set_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask,
+ u32 rx_mask, int slots, int slot_width)
+{
+ u32 val = 0;
+ u16 resolution;
+
+ struct i2s_dev_data *adata = snd_soc_dai_get_drvdata(cpu_dai);
+
+ switch (slot_width) {
+ case 8:
+ resolution = 0;
+ break;
+ case 16:
+ resolution = 2;
+ break;
+ case 24:
+ resolution = 4;
+ break;
+ case 32:
+ resolution = 5;
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+
+ val = rv_readl(adata->acp3x_base + mmACP_BTTDM_ITER);
+ rv_writel((val | 0x2), adata->acp3x_base + mmACP_BTTDM_ITER);
+ val = rv_readl(adata->acp3x_base + mmACP_BTTDM_IRER);
+ rv_writel((val | 0x2), adata->acp3x_base + mmACP_BTTDM_IRER);
+
+ val = (FRM_LEN | ((slots-1) << 15) | (resolution << 18));
+ rv_writel(val, adata->acp3x_base + mmACP_BTTDM_TXFRMT);
+ rv_writel(val, adata->acp3x_base + mmACP_BTTDM_RXFRMT);
+
+ adata->tdm_fmt = val;
+ return 0;
+}
+
static int acp3x_dai_i2s_hwparams(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
@@ -519,6 +578,8 @@ static int acp3x_dai_i2s_trigger(struct snd_pcm_substream *substream,
struct snd_soc_dai_ops acp3x_dai_i2s_ops = {
.hw_params = acp3x_dai_i2s_hwparams,
.trigger = acp3x_dai_i2s_trigger,
+ .set_fmt = acp3x_dai_i2s_set_fmt,
+ .set_tdm_slot = acp3x_dai_set_tdm_slot,
};
static struct snd_soc_dai_driver acp3x_i2s_dai_driver = {
diff --git a/sound/soc/amd/raven/acp3x.h b/sound/soc/amd/raven/acp3x.h
index d35d252..70fed97 100644
--- a/sound/soc/amd/raven/acp3x.h
+++ b/sound/soc/amd/raven/acp3x.h
@@ -9,6 +9,7 @@
#define ACP_SRAM_PTE_OFFSET 0x02050000
#define PAGE_SIZE_4K_ENABLE 0x2
#define MEM_WINDOW_START 0x4000000
+#define FRM_LEN 256
#define PLAYBACK_MIN_NUM_PERIODS 2
#define PLAYBACK_MAX_NUM_PERIODS 2
--
2.5.5
