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ASoC: rockchip: i2s-tdm: Add support for comp resume deferred

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Slave Resume Situation:
i2s-tdm acts as slave, and the external device, such as dsp
acts as master.

aplay -D hw:0,0 --period-size=1024 --buffer-size=4096 t.wav &

echo mem > /sys/power/state

the aplay was freeze and system go to sleep.

press the power-key to wakeup system, and now the aplay will
resume playback.

But, there is a case the external dev resume too slow to provide
clk to i2s-tdm, so, we need add a delay to make it resume well.

e.g.

&i2s {
	rockchip,resume-deferred-ms = <1000>;
};

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Change-Id: If9a82c8357cef23bd50305c585ee28794f45d347
This commit is contained in:
Sugar Zhang
2024-07-29 10:17:47 +08:00
committed by Tao Huang
parent 61632fe66b
commit b6f0f8c611
1 changed files with 19 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
sound/soc/rockchip/rockchip_i2s_tdm.c
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@@ -151,6 +151,7 @@ struct rk_i2s_tdm_dev {
unsigned int quirks;
unsigned int lrck_ratio;
unsigned int tdm_slots;
unsigned int resume_deferred_ms;
int clk_ppm;
int refcount;
spinlock_t lock; /* xfer lock */
@@ -2386,6 +2387,19 @@ static void rockchip_i2s_tdm_shutdown(struct snd_pcm_substream *substream,
i2s_tdm->substreams[substream->stream] = NULL;
}
static int rockchip_i2s_tdm_comp_resume(struct snd_soc_component *component)
{
struct rk_i2s_tdm_dev *i2s_tdm = snd_soc_component_get_drvdata(component);
if (i2s_tdm->resume_deferred_ms)
msleep(i2s_tdm->resume_deferred_ms);
dev_dbg(component->dev, "%s: resume deferred %d ms\n",
__func__, i2s_tdm->resume_deferred_ms);
return 0;
}
static const struct snd_soc_dai_ops rockchip_i2s_tdm_dai_ops = {
.startup = rockchip_i2s_tdm_startup,
.shutdown = rockchip_i2s_tdm_shutdown,
@@ -2403,6 +2417,7 @@ static const struct snd_soc_component_driver rockchip_i2s_tdm_component = {
.legacy_dai_naming = 1,
.controls = rockchip_i2s_tdm_snd_controls,
.num_controls = ARRAY_SIZE(rockchip_i2s_tdm_snd_controls),
.resume = rockchip_i2s_tdm_comp_resume,
};
static bool rockchip_i2s_tdm_wr_reg(struct device *dev, unsigned int reg)
@@ -3098,7 +3113,7 @@ static int rockchip_i2s_tdm_probe(struct platform_device *pdev)
#ifdef HAVE_SYNC_RESET
bool sync;
#endif
int ret, i, irq;
int ret, val, i, irq;
i2s_tdm = devm_kzalloc(&pdev->dev, sizeof(*i2s_tdm), GFP_KERNEL);
if (!i2s_tdm)
@@ -3107,6 +3122,9 @@ static int rockchip_i2s_tdm_probe(struct platform_device *pdev)
i2s_tdm->dev = &pdev->dev;
i2s_tdm->lrck_ratio = 1;
if (!device_property_read_u32(i2s_tdm->dev, "rockchip,resume-deferred-ms", &val))
i2s_tdm->resume_deferred_ms = val;
/*
* Should use flag GPIOD_ASIS not to reclaim LRCK pin as GPIO function,
* because we use the same PIN and just read EXT_PORT value which show