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ASoC: rockchip: trcm: Add support for always-on

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Initialize the dma guard and trigger run for always-on.

Use the max-16w to cover all 2^n cases, maybe better
per channels and fmt, at the moment, we use the simple
way.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Change-Id: Ia4b9ba06a9cb1385f4cda7125f7f4680e6ebe6e0
This commit is contained in:
Sugar Zhang
2024-03-30 17:05:31 +08:00
committed by Tao Huang
parent f190480867
commit cb6e47fce7
1 changed files with 38 additions and 0 deletions
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38
sound/soc/rockchip/rockchip_trcm.c
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@@ -36,6 +36,7 @@ struct dmaengine_trcm {
struct dma_chan *chan[SNDRV_PCM_STREAM_LAST + 1];
struct dmaengine_dma_guard guard[SNDRV_PCM_STREAM_LAST + 1];
struct snd_soc_component component;
bool always_on;
};
struct dmaengine_trcm_runtime_data {
@@ -340,6 +341,7 @@ static int dmaengine_trcm_dma_guard_new(struct snd_soc_component *component,
struct dmaengine_trcm *trcm = soc_component_to_trcm(component);
struct snd_dmaengine_dai_dma_data *dma_data;
struct snd_pcm_substream *substream;
struct snd_soc_dai *dai;
struct dma_chan *chan;
struct dma_slave_config slave_config;
struct device *dev;
@@ -350,6 +352,8 @@ static int dmaengine_trcm_dma_guard_new(struct snd_soc_component *component,
for_each_pcm_streams(i) {
substream = rtd->pcm->streams[i].substream;
if (!substream)
continue;
dev = dmaengine_dma_dev(trcm, substream);
chan = trcm->chan[i];
@@ -370,11 +374,43 @@ static int dmaengine_trcm_dma_guard_new(struct snd_soc_component *component,
snd_dmaengine_pcm_set_config_from_dai_data(substream, dma_data,
&slave_config);
/*
* Use the max-16w to cover all 2^n cases, maybe better
* per channels and fmt, at the moment, we use the simple
* way.
*/
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
slave_config.direction = DMA_MEM_TO_DEV;
slave_config.dst_maxburst = 16;
} else {
slave_config.direction = DMA_DEV_TO_MEM;
slave_config.src_maxburst = 16;
}
ret = dmaengine_slave_config(chan, &slave_config);
if (ret)
return ret;
}
if (trcm->always_on) {
/* Start the first one will auto trigger bstream guard. */
for_each_pcm_streams(i) {
substream = rtd->pcm->streams[i].substream;
if (!substream)
continue;
dai = asoc_rtd_to_cpu(rtd, 0);
if (!dai)
continue;
dmaengine_trcm_dma_guard_ctrl(component, substream->stream, 1);
ret = dai->driver->ops->trigger(substream,
SNDRV_PCM_TRIGGER_START,
dai);
if (ret)
return ret;
}
}
return 0;
}
@@ -492,6 +528,8 @@ static int snd_dmaengine_trcm_register(struct device *dev)
trcm->dev = dev;
trcm->always_on = device_property_read_bool(dev, "rockchip,always-on");
#ifdef CONFIG_DEBUG_FS
trcm->component.debugfs_prefix = "dma";
#endif