[alsa-devel] [PATCH 1/3] ASoC: amd: acp dma driver code cleanup
Vijendar Mukunda
Vijendar.Mukunda at amd.com
Tue Apr 24 05:04:36 CEST 2018
Added dma configuration parameters in audio_substream_data
structure. Moved dma configuration parameters initialization
to dma hw params callback.
Removed separate byte count variables for playback and capture.
Added variables to store ACP register offsets in audio_substream_data
structure.
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda at amd.com>
---
sound/soc/amd/acp-pcm-dma.c | 241 ++++++++++++++++++--------------------------
sound/soc/amd/acp.h | 35 +++++--
2 files changed, 126 insertions(+), 150 deletions(-)
diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c
index 5ffe2ef..4a4bbdf 100644
--- a/sound/soc/amd/acp-pcm-dma.c
+++ b/sound/soc/amd/acp-pcm-dma.c
@@ -317,54 +317,21 @@ static void acp_pte_config(void __iomem *acp_mmio, struct page *pg,
}
static void config_acp_dma(void __iomem *acp_mmio,
- struct audio_substream_data *audio_config,
+ struct audio_substream_data *rtd,
u32 asic_type)
{
- u32 pte_offset, sram_bank;
- u16 ch1, ch2, destination, dma_dscr_idx;
-
- if (audio_config->direction == SNDRV_PCM_STREAM_PLAYBACK) {
- pte_offset = ACP_PLAYBACK_PTE_OFFSET;
- ch1 = SYSRAM_TO_ACP_CH_NUM;
- ch2 = ACP_TO_I2S_DMA_CH_NUM;
- sram_bank = ACP_SHARED_RAM_BANK_1_ADDRESS;
- destination = TO_ACP_I2S_1;
-
- } else {
- pte_offset = ACP_CAPTURE_PTE_OFFSET;
- ch1 = SYSRAM_TO_ACP_CH_NUM;
- ch2 = ACP_TO_I2S_DMA_CH_NUM;
- switch (asic_type) {
- case CHIP_STONEY:
- sram_bank = ACP_SHARED_RAM_BANK_3_ADDRESS;
- break;
- default:
- sram_bank = ACP_SHARED_RAM_BANK_5_ADDRESS;
- }
- destination = FROM_ACP_I2S_1;
- }
-
- acp_pte_config(acp_mmio, audio_config->pg, audio_config->num_of_pages,
- pte_offset);
- if (audio_config->direction == SNDRV_PCM_STREAM_PLAYBACK)
- dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH12;
- else
- dma_dscr_idx = CAPTURE_START_DMA_DESCR_CH14;
-
+ acp_pte_config(acp_mmio, rtd->pg, rtd->num_of_pages,
+ rtd->pte_offset);
/* Configure System memory <-> ACP SRAM DMA descriptors */
- set_acp_sysmem_dma_descriptors(acp_mmio, audio_config->size,
- audio_config->direction, pte_offset, ch1,
- sram_bank, dma_dscr_idx, asic_type);
-
- if (audio_config->direction == SNDRV_PCM_STREAM_PLAYBACK)
- dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH13;
- else
- dma_dscr_idx = CAPTURE_START_DMA_DESCR_CH15;
+ set_acp_sysmem_dma_descriptors(acp_mmio, rtd->size,
+ rtd->direction, rtd->pte_offset,
+ rtd->ch1, rtd->sram_bank,
+ rtd->dma_dscr_idx_1, asic_type);
/* Configure ACP SRAM <-> I2S DMA descriptors */
- set_acp_to_i2s_dma_descriptors(acp_mmio, audio_config->size,
- audio_config->direction, sram_bank,
- destination, ch2, dma_dscr_idx,
- asic_type);
+ set_acp_to_i2s_dma_descriptors(acp_mmio, rtd->size,
+ rtd->direction, rtd->sram_bank,
+ rtd->destination, rtd->ch2,
+ rtd->dma_dscr_idx_2, asic_type);
}
/* Start a given DMA channel transfer */
@@ -700,7 +667,6 @@ static irqreturn_t dma_irq_handler(int irq, void *arg)
static int acp_dma_open(struct snd_pcm_substream *substream)
{
- u16 bank;
int ret = 0;
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_soc_pcm_runtime *prtd = substream->private_data;
@@ -720,6 +686,7 @@ static int acp_dma_open(struct snd_pcm_substream *substream)
default:
runtime->hw = acp_pcm_hardware_playback;
}
+ adata->bytescount = 0;
} else {
switch (intr_data->asic_type) {
case CHIP_STONEY:
@@ -728,6 +695,7 @@ static int acp_dma_open(struct snd_pcm_substream *substream)
default:
runtime->hw = acp_pcm_hardware_capture;
}
+ adata->bytescount = 0;
}
ret = snd_pcm_hw_constraint_integer(runtime,
@@ -749,28 +717,6 @@ static int acp_dma_open(struct snd_pcm_substream *substream)
*/
if (!intr_data->play_i2ssp_stream && !intr_data->capture_i2ssp_stream)
acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- intr_data->play_i2ssp_stream = substream;
- /*
- * For Stoney, Memory gating is disabled,i.e SRAM Banks
- * won't be turned off. The default state for SRAM banks is ON.
- * Setting SRAM bank state code skipped for STONEY platform.
- */
- if (intr_data->asic_type != CHIP_STONEY) {
- for (bank = 1; bank <= 4; bank++)
- acp_set_sram_bank_state(intr_data->acp_mmio,
- bank, true);
- }
- } else {
- intr_data->capture_i2ssp_stream = substream;
- if (intr_data->asic_type != CHIP_STONEY) {
- for (bank = 5; bank <= 8; bank++)
- acp_set_sram_bank_state(intr_data->acp_mmio,
- bank, true);
- }
- }
-
return 0;
}
@@ -779,6 +725,7 @@ static int acp_dma_hw_params(struct snd_pcm_substream *substream,
{
int status;
uint64_t size;
+ u16 bank;
u32 val = 0;
struct page *pg;
struct snd_pcm_runtime *runtime;
@@ -804,6 +751,60 @@ static int acp_dma_hw_params(struct snd_pcm_substream *substream,
acp_reg_write(val, adata->acp_mmio,
mmACP_I2S_16BIT_RESOLUTION_EN);
}
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ switch (adata->asic_type) {
+ case CHIP_STONEY:
+ rtd->pte_offset = ACP_ST_PLAYBACK_PTE_OFFSET;
+ break;
+ default:
+ rtd->pte_offset = ACP_PLAYBACK_PTE_OFFSET;
+ }
+ rtd->ch1 = SYSRAM_TO_ACP_CH_NUM;
+ rtd->ch2 = ACP_TO_I2S_DMA_CH_NUM;
+ rtd->sram_bank = ACP_SRAM_BANK_1_ADDRESS;
+ rtd->destination = TO_ACP_I2S_1;
+ rtd->dma_dscr_idx_1 = PLAYBACK_START_DMA_DESCR_CH12;
+ rtd->dma_dscr_idx_2 = PLAYBACK_START_DMA_DESCR_CH13;
+ rtd->byte_cnt_high_reg_offset =
+ mmACP_I2S_TRANSMIT_BYTE_CNT_HIGH;
+ rtd->byte_cnt_low_reg_offset = mmACP_I2S_TRANSMIT_BYTE_CNT_LOW;
+ adata->play_i2ssp_stream = substream;
+ /*
+ * For Stoney, Memory gating is disabled,i.e SRAM Banks
+ * won't be turned off. The default state for SRAM banks is ON.
+ * Setting SRAM bank state code skipped for STONEY platform.
+ */
+ if (adata->asic_type != CHIP_STONEY) {
+ for (bank = 1; bank <= 4; bank++)
+ acp_set_sram_bank_state(adata->acp_mmio,
+ bank, true);
+ }
+ } else {
+ rtd->pte_offset = ACP_CAPTURE_PTE_OFFSET;
+ rtd->ch1 = SYSRAM_TO_ACP_CH_NUM;
+ rtd->ch2 = ACP_TO_I2S_DMA_CH_NUM;
+ switch (adata->asic_type) {
+ case CHIP_STONEY:
+ rtd->sram_bank = ACP_SRAM_BANK_2_ADDRESS;
+ break;
+ default:
+ rtd->sram_bank = ACP_SRAM_BANK_5_ADDRESS;
+ }
+ rtd->destination = FROM_ACP_I2S_1;
+ rtd->dma_dscr_idx_1 = CAPTURE_START_DMA_DESCR_CH14;
+ rtd->dma_dscr_idx_2 = CAPTURE_START_DMA_DESCR_CH15;
+ rtd->byte_cnt_high_reg_offset =
+ mmACP_I2S_RECEIVED_BYTE_CNT_HIGH;
+ rtd->byte_cnt_low_reg_offset = mmACP_I2S_RECEIVED_BYTE_CNT_LOW;
+ adata->capture_i2ssp_stream = substream;
+ if (adata->asic_type != CHIP_STONEY) {
+ for (bank = 5; bank <= 8; bank++)
+ acp_set_sram_bank_state(adata->acp_mmio,
+ bank, true);
+ }
+ }
+
size = params_buffer_bytes(params);
status = snd_pcm_lib_malloc_pages(substream, size);
if (status < 0)
@@ -837,26 +838,15 @@ static int acp_dma_hw_free(struct snd_pcm_substream *substream)
return snd_pcm_lib_free_pages(substream);
}
-static u64 acp_get_byte_count(void __iomem *acp_mmio, int stream)
+static u64 acp_get_byte_count(struct audio_substream_data *rtd)
{
- union acp_dma_count playback_dma_count;
- union acp_dma_count capture_dma_count;
- u64 bytescount = 0;
+ union acp_dma_count byte_count;
- if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
- playback_dma_count.bcount.high = acp_reg_read(acp_mmio,
- mmACP_I2S_TRANSMIT_BYTE_CNT_HIGH);
- playback_dma_count.bcount.low = acp_reg_read(acp_mmio,
- mmACP_I2S_TRANSMIT_BYTE_CNT_LOW);
- bytescount = playback_dma_count.bytescount;
- } else {
- capture_dma_count.bcount.high = acp_reg_read(acp_mmio,
- mmACP_I2S_RECEIVED_BYTE_CNT_HIGH);
- capture_dma_count.bcount.low = acp_reg_read(acp_mmio,
- mmACP_I2S_RECEIVED_BYTE_CNT_LOW);
- bytescount = capture_dma_count.bytescount;
- }
- return bytescount;
+ byte_count.bcount.high = acp_reg_read(rtd->acp_mmio,
+ rtd->byte_cnt_high_reg_offset);
+ byte_count.bcount.low = acp_reg_read(rtd->acp_mmio,
+ rtd->byte_cnt_low_reg_offset);
+ return byte_count.bytescount;
}
static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream)
@@ -872,15 +862,10 @@ static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream)
return -EINVAL;
buffersize = frames_to_bytes(runtime, runtime->buffer_size);
- bytescount = acp_get_byte_count(rtd->acp_mmio, substream->stream);
+ bytescount = acp_get_byte_count(rtd);
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- if (bytescount > rtd->i2ssp_renderbytescount)
- bytescount = bytescount - rtd->i2ssp_renderbytescount;
- } else {
- if (bytescount > rtd->i2ssp_capturebytescount)
- bytescount = bytescount - rtd->i2ssp_capturebytescount;
- }
+ if (bytescount > rtd->bytescount)
+ bytescount = bytescount - rtd->bytescount;
pos = do_div(bytescount, buffersize);
return bytes_to_frames(runtime, pos);
}
@@ -898,21 +883,15 @@ static int acp_dma_prepare(struct snd_pcm_substream *substream)
if (!rtd)
return -EINVAL;
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- config_acp_dma_channel(rtd->acp_mmio, SYSRAM_TO_ACP_CH_NUM,
- PLAYBACK_START_DMA_DESCR_CH12,
- NUM_DSCRS_PER_CHANNEL, 0);
- config_acp_dma_channel(rtd->acp_mmio, ACP_TO_I2S_DMA_CH_NUM,
- PLAYBACK_START_DMA_DESCR_CH13,
- NUM_DSCRS_PER_CHANNEL, 0);
- } else {
- config_acp_dma_channel(rtd->acp_mmio, ACP_TO_SYSRAM_CH_NUM,
- CAPTURE_START_DMA_DESCR_CH14,
- NUM_DSCRS_PER_CHANNEL, 0);
- config_acp_dma_channel(rtd->acp_mmio, I2S_TO_ACP_DMA_CH_NUM,
- CAPTURE_START_DMA_DESCR_CH15,
- NUM_DSCRS_PER_CHANNEL, 0);
- }
+
+ config_acp_dma_channel(rtd->acp_mmio,
+ rtd->ch1,
+ rtd->dma_dscr_idx_1,
+ NUM_DSCRS_PER_CHANNEL, 0);
+ config_acp_dma_channel(rtd->acp_mmio,
+ rtd->ch2,
+ rtd->dma_dscr_idx_2,
+ NUM_DSCRS_PER_CHANNEL, 0);
return 0;
}
@@ -934,15 +913,13 @@ static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd)
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_RESUME:
- bytescount = acp_get_byte_count(rtd->acp_mmio,
- substream->stream);
+ bytescount = acp_get_byte_count(rtd);
+ if (rtd->bytescount == 0)
+ rtd->bytescount = bytescount;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- if (rtd->i2ssp_renderbytescount == 0)
- rtd->i2ssp_renderbytescount = bytescount;
- acp_dma_start(rtd->acp_mmio,
- SYSRAM_TO_ACP_CH_NUM, false);
+ acp_dma_start(rtd->acp_mmio, rtd->ch1, false);
while (acp_reg_read(rtd->acp_mmio, mmACP_DMA_CH_STS) &
- BIT(SYSRAM_TO_ACP_CH_NUM)) {
+ BIT(rtd->ch1)) {
if (!loops--) {
dev_err(component->dev,
"acp dma start timeout\n");
@@ -950,40 +927,21 @@ static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd)
}
cpu_relax();
}
-
- acp_dma_start(rtd->acp_mmio,
- ACP_TO_I2S_DMA_CH_NUM, true);
-
- } else {
- if (rtd->i2ssp_capturebytescount == 0)
- rtd->i2ssp_capturebytescount = bytescount;
- acp_dma_start(rtd->acp_mmio,
- I2S_TO_ACP_DMA_CH_NUM, true);
}
+ acp_dma_start(rtd->acp_mmio, rtd->ch2, true);
ret = 0;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND:
- /*
- * Need to stop only circular DMA channels :
- * ACP_TO_I2S_DMA_CH_NUM / I2S_TO_ACP_DMA_CH_NUM. Non-circular
- * channels will stopped automatically after its transfer
- * completes : SYSRAM_TO_ACP_CH_NUM / ACP_TO_SYSRAM_CH_NUM
- */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- ret = acp_dma_stop(rtd->acp_mmio,
- SYSRAM_TO_ACP_CH_NUM);
- ret = acp_dma_stop(rtd->acp_mmio,
- ACP_TO_I2S_DMA_CH_NUM);
- rtd->i2ssp_renderbytescount = 0;
+ acp_dma_stop(rtd->acp_mmio, rtd->ch1);
+ ret = acp_dma_stop(rtd->acp_mmio, rtd->ch2);
} else {
- ret = acp_dma_stop(rtd->acp_mmio,
- I2S_TO_ACP_DMA_CH_NUM);
- ret = acp_dma_stop(rtd->acp_mmio,
- ACP_TO_SYSRAM_CH_NUM);
- rtd->i2ssp_capturebytescount = 0;
+ acp_dma_stop(rtd->acp_mmio, rtd->ch2);
+ ret = acp_dma_stop(rtd->acp_mmio, rtd->ch1);
}
+ rtd->bytescount = 0;
break;
default:
ret = -EINVAL;
@@ -1028,8 +986,6 @@ static int acp_dma_close(struct snd_pcm_substream *substream)
DRV_NAME);
struct audio_drv_data *adata = dev_get_drvdata(component->dev);
- kfree(rtd);
-
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
adata->play_i2ssp_stream = NULL;
/*
@@ -1059,6 +1015,7 @@ static int acp_dma_close(struct snd_pcm_substream *substream)
if (!adata->play_i2ssp_stream && !adata->capture_i2ssp_stream)
acp_reg_write(0, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
+ kfree(rtd);
return 0;
}
diff --git a/sound/soc/amd/acp.h b/sound/soc/amd/acp.h
index 0e6089b..62695ed 100644
--- a/sound/soc/amd/acp.h
+++ b/sound/soc/amd/acp.h
@@ -10,17 +10,28 @@
#define ACP_PLAYBACK_PTE_OFFSET 10
#define ACP_CAPTURE_PTE_OFFSET 0
+/* Playback and Capture Offset for Stoney */
+#define ACP_ST_PLAYBACK_PTE_OFFSET 0x04
+#define ACP_ST_CAPTURE_PTE_OFFSET 0x00
+
#define ACP_GARLIC_CNTL_DEFAULT 0x00000FB4
#define ACP_ONION_CNTL_DEFAULT 0x00000FB4
#define ACP_PHYSICAL_BASE 0x14000
-/* Playback SRAM address (as a destination in dma descriptor) */
-#define ACP_SHARED_RAM_BANK_1_ADDRESS 0x4002000
-
-/* Capture SRAM address (as a source in dma descriptor) */
-#define ACP_SHARED_RAM_BANK_5_ADDRESS 0x400A000
-#define ACP_SHARED_RAM_BANK_3_ADDRESS 0x4006000
+/*
+ * In case of I2S SP controller instance, Stoney uses SRAM bank 1 for
+ * playback and SRAM Bank 2 for capture where as in case of BT I2S
+ * Instance, Stoney uses SRAM Bank 3 for playback & SRAM Bank 4 will
+ * be used for capture. Carrizo uses I2S SP controller instance. SRAM Banks
+ * 1, 2, 3, 4 will be used for playback & SRAM Banks 5, 6, 7, 8 will be used
+ * for capture scenario.
+ */
+#define ACP_SRAM_BANK_1_ADDRESS 0x4002000
+#define ACP_SRAM_BANK_2_ADDRESS 0x4004000
+#define ACP_SRAM_BANK_3_ADDRESS 0x4006000
+#define ACP_SRAM_BANK_4_ADDRESS 0x4008000
+#define ACP_SRAM_BANK_5_ADDRESS 0x400A000
#define ACP_DMA_RESET_TIME 10000
#define ACP_CLOCK_EN_TIME_OUT_VALUE 0x000000FF
@@ -85,9 +96,17 @@ struct audio_substream_data {
unsigned int order;
u16 num_of_pages;
u16 direction;
+ u16 ch1;
+ u16 ch2;
+ u16 destination;
+ u16 dma_dscr_idx_1;
+ u16 dma_dscr_idx_2;
+ u32 pte_offset;
+ u32 sram_bank;
+ u32 byte_cnt_high_reg_offset;
+ u32 byte_cnt_low_reg_offset;
uint64_t size;
- u64 i2ssp_renderbytescount;
- u64 i2ssp_capturebytescount;
+ u64 bytescount;
void __iomem *acp_mmio;
};
--
2.7.4
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