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Message-ID: <20230214161435.1088246-2-claudiu.beznea@microchip.com>
Date: Tue, 14 Feb 2023 18:14:33 +0200
From: Claudiu Beznea <claudiu.beznea@...rochip.com>
To: <lgirdwood@...il.com>, <broonie@...nel.org>, <robh+dt@...nel.org>,
<krzysztof.kozlowski+dt@...aro.org>, <lars@...afoo.de>,
<perex@...ex.cz>, <tiwai@...e.com>, <nicolas.ferre@...rochip.com>,
<alexandre.belloni@...tlin.com>
CC: <alsa-devel@...a-project.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH 1/3] ASoC: soc-generic-dmaengine-pcm: add option to start DMA after DAI
Add option to start DMA component after DAI trigger. This is done
by filling the new struct snd_dmaengine_pcm_config::start_dma_last.
Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
include/sound/dmaengine_pcm.h | 1 +
include/sound/soc-component.h | 2 ++
sound/soc/soc-generic-dmaengine-pcm.c | 8 +++++---
sound/soc/soc-pcm.c | 27 ++++++++++++++++++++++-----
4 files changed, 30 insertions(+), 8 deletions(-)
diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h
index 2df54cf02cb3..4e3dcb94576d 100644
--- a/include/sound/dmaengine_pcm.h
+++ b/include/sound/dmaengine_pcm.h
@@ -149,6 +149,7 @@ struct snd_dmaengine_pcm_config {
const struct snd_pcm_hardware *pcm_hardware;
unsigned int prealloc_buffer_size;
+ unsigned int start_dma_last;
};
int snd_dmaengine_pcm_register(struct device *dev,
diff --git a/include/sound/soc-component.h b/include/sound/soc-component.h
index 3203d35bc8c1..0814ed143864 100644
--- a/include/sound/soc-component.h
+++ b/include/sound/soc-component.h
@@ -190,6 +190,8 @@ struct snd_soc_component_driver {
bool use_dai_pcm_id; /* use DAI link PCM ID as PCM device number */
int be_pcm_base; /* base device ID for all BE PCMs */
+ unsigned int start_dma_last;
+
#ifdef CONFIG_DEBUG_FS
const char *debugfs_prefix;
#endif
diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c
index 3b99f619e37e..264e87af6b58 100644
--- a/sound/soc/soc-generic-dmaengine-pcm.c
+++ b/sound/soc/soc-generic-dmaengine-pcm.c
@@ -318,7 +318,7 @@ static int dmaengine_copy_user(struct snd_soc_component *component,
return 0;
}
-static const struct snd_soc_component_driver dmaengine_pcm_component = {
+static struct snd_soc_component_driver dmaengine_pcm_component = {
.name = SND_DMAENGINE_PCM_DRV_NAME,
.probe_order = SND_SOC_COMP_ORDER_LATE,
.open = dmaengine_pcm_open,
@@ -329,7 +329,7 @@ static const struct snd_soc_component_driver dmaengine_pcm_component = {
.pcm_construct = dmaengine_pcm_new,
};
-static const struct snd_soc_component_driver dmaengine_pcm_component_process = {
+static struct snd_soc_component_driver dmaengine_pcm_component_process = {
.name = SND_DMAENGINE_PCM_DRV_NAME,
.probe_order = SND_SOC_COMP_ORDER_LATE,
.open = dmaengine_pcm_open,
@@ -425,7 +425,7 @@ static const struct snd_dmaengine_pcm_config snd_dmaengine_pcm_default_config =
int snd_dmaengine_pcm_register(struct device *dev,
const struct snd_dmaengine_pcm_config *config, unsigned int flags)
{
- const struct snd_soc_component_driver *driver;
+ struct snd_soc_component_driver *driver;
struct dmaengine_pcm *pcm;
int ret;
@@ -450,6 +450,8 @@ int snd_dmaengine_pcm_register(struct device *dev,
else
driver = &dmaengine_pcm_component;
+ driver->start_dma_last = config->start_dma_last;
+
ret = snd_soc_component_initialize(&pcm->component, driver, dev);
if (ret)
goto err_free_dma;
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 005b179a770a..ec429b93a4ee 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1088,22 +1088,39 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
- int ret = -EINVAL, _ret = 0;
+ struct snd_soc_component *component;
+ int ret = -EINVAL, _ret = 0, start_dma_last = 0, i;
int rollback = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ /* Do we need to start dma first? */
+ for_each_rtd_components(rtd, i, component) {
+ if (component->driver->start_dma_last) {
+ start_dma_last = 1;
+ break;
+ }
+ }
+
ret = snd_soc_link_trigger(substream, cmd, 0);
if (ret < 0)
goto start_err;
- ret = snd_soc_pcm_component_trigger(substream, cmd, 0);
- if (ret < 0)
- goto start_err;
+ if (start_dma_last) {
+ ret = snd_soc_pcm_dai_trigger(substream, cmd, 0);
+ if (ret < 0)
+ goto start_err;
+
+ ret = snd_soc_pcm_component_trigger(substream, cmd, 0);
+ } else {
+ ret = snd_soc_pcm_component_trigger(substream, cmd, 0);
+ if (ret < 0)
+ goto start_err;
- ret = snd_soc_pcm_dai_trigger(substream, cmd, 0);
+ ret = snd_soc_pcm_dai_trigger(substream, cmd, 0);
+ }
start_err:
if (ret < 0)
rollback = 1;
--
2.34.1
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