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ASoC: AMD: Manage ACP 2.x SRAM banks power 

ACP SRAM banks gets turned on when ACP is powered on.
Not all banks are used for playback/capture. So, power on
required banks during audio device open and power off during
audio device close.

Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Maruthi Srinivas Bayyavarapu 2016-01-08 18:22:11 -05:00 committed by Mark Brown
parent 1927da9355
commit c36d9b3f6d
1 changed files with 87 additions and 7 deletions
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94
sound/soc/amd/acp-pcm-dma.c
View File

@ -376,9 +376,57 @@ static int acp_dma_stop(void __iomem *acp_mmio, u8 ch_num)
return 0;
}
static void acp_set_sram_bank_state(void __iomem *acp_mmio, u16 bank,
bool power_on)
{
u32 val, req_reg, sts_reg, sts_reg_mask;
u32 loops = 1000;
if (bank < 32) {
req_reg = mmACP_MEM_SHUT_DOWN_REQ_LO;
sts_reg = mmACP_MEM_SHUT_DOWN_STS_LO;
sts_reg_mask = 0xFFFFFFFF;
} else {
bank -= 32;
req_reg = mmACP_MEM_SHUT_DOWN_REQ_HI;
sts_reg = mmACP_MEM_SHUT_DOWN_STS_HI;
sts_reg_mask = 0x0000FFFF;
}
val = acp_reg_read(acp_mmio, req_reg);
if (val & (1 << bank)) {
/* bank is in off state */
if (power_on == true)
/* request to on */
val &= ~(1 << bank);
else
/* request to off */
return;
} else {
/* bank is in on state */
if (power_on == false)
/* request to off */
val |= 1 << bank;
else
/* request to on */
return;
}
acp_reg_write(val, acp_mmio, req_reg);
while (acp_reg_read(acp_mmio, sts_reg) != sts_reg_mask) {
if (!loops--) {
pr_err("ACP SRAM bank %d state change failed\n", bank);
break;
}
cpu_relax();
}
}
/* Initialize and bring ACP hardware to default state. */
static int acp_init(void __iomem *acp_mmio)
{
u16 bank;
u32 val, count, sram_pte_offset;
/* Assert Soft reset of ACP */
@ -447,6 +495,13 @@ static int acp_init(void __iomem *acp_mmio)
acp_reg_write(ACP_EXTERNAL_INTR_CNTL__DMAIOCMask_MASK,
acp_mmio, mmACP_EXTERNAL_INTR_CNTL);
/* When ACP_TILE_P1 is turned on, all SRAM banks get turned on.
* Now, turn off all of them. This can't be done in 'poweron' of
* ACP pm domain, as this requires ACP to be initialized.
*/
for (bank = 1; bank < 48; bank++)
acp_set_sram_bank_state(acp_mmio, bank, false);
return 0;
}
@ -559,6 +614,7 @@ 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;
@ -592,10 +648,17 @@ static int acp_dma_open(struct snd_pcm_substream *substream)
if (!intr_data->play_stream && !intr_data->capture_stream)
acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
intr_data->play_stream = substream;
else
for (bank = 1; bank <= 4; bank++)
acp_set_sram_bank_state(intr_data->acp_mmio, bank,
true);
} else {
intr_data->capture_stream = substream;
for (bank = 5; bank <= 8; bank++)
acp_set_sram_bank_state(intr_data->acp_mmio, bank,
true);
}
return 0;
}
@ -627,6 +690,7 @@ static int acp_dma_hw_params(struct snd_pcm_substream *substream,
pg = virt_to_page(substream->dma_buffer.area);
if (pg != NULL) {
acp_set_sram_bank_state(rtd->acp_mmio, 0, true);
/* Save for runtime private data */
rtd->pg = pg;
rtd->order = get_order(size);
@ -802,6 +866,7 @@ static int acp_dma_new(struct snd_soc_pcm_runtime *rtd)
static int acp_dma_close(struct snd_pcm_substream *substream)
{
u16 bank;
struct snd_pcm_runtime *runtime = substream->runtime;
struct audio_substream_data *rtd = runtime->private_data;
struct snd_soc_pcm_runtime *prtd = substream->private_data;
@ -809,10 +874,17 @@ static int acp_dma_close(struct snd_pcm_substream *substream)
kfree(rtd);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
adata->play_stream = NULL;
else
for (bank = 1; bank <= 4; bank++)
acp_set_sram_bank_state(adata->acp_mmio, bank,
false);
} else {
adata->capture_stream = NULL;
for (bank = 5; bank <= 8; bank++)
acp_set_sram_bank_state(adata->acp_mmio, bank,
false);
}
/* Disable ACP irq, when the current stream is being closed and
* another stream is also not active.
@ -906,17 +978,25 @@ static int acp_audio_remove(struct platform_device *pdev)
static int acp_pcm_resume(struct device *dev)
{
u16 bank;
struct audio_drv_data *adata = dev_get_drvdata(dev);
acp_init(adata->acp_mmio);
if (adata->play_stream && adata->play_stream->runtime)
if (adata->play_stream && adata->play_stream->runtime) {
for (bank = 1; bank <= 4; bank++)
acp_set_sram_bank_state(adata->acp_mmio, bank,
true);
config_acp_dma(adata->acp_mmio,
adata->play_stream->runtime->private_data);
if (adata->capture_stream && adata->capture_stream->runtime)
}
if (adata->capture_stream && adata->capture_stream->runtime) {
for (bank = 5; bank <= 8; bank++)
acp_set_sram_bank_state(adata->acp_mmio, bank,
true);
config_acp_dma(adata->acp_mmio,
adata->capture_stream->runtime->private_data);
}
acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
return 0;
}