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ASoC: mediatek: mt8195: correct pcmif BE dai control flow
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Originally, the conditions for preventing reentry are not correct.
dai->component->active is not the state specifically for pcmif dai, so it
is not a correct condition to indicate the status of pcmif dai.
On the other hand, snd_soc_dai_stream_actvie() in prepare ops for both
playback and capture possibly return true at the first entry when these
two streams are opened at the same time.

In the patch, I refer to the implementation in mt8192-dai-pcm.c.
Clock and enabling bit for PCMIF are managed by DAPM, and the condition
for prepare ops is replaced by the status of dai widget.

Fixes: 1f95c01 ("ASoC: mediatek: mt8195: support pcm in platform driver")
Signed-off-by: Trevor Wu <trevor.wu@mediatek.com>
Link: https://lore.kernel.org/r/20211230084731.31372-2-trevor.wu@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Trevor Wu authored and Mark Brown committed Dec 31, 2021
1 parent cc5c978 commit 2355028
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Showing 2 changed files with 22 additions and 52 deletions.
73 changes: 21 additions & 52 deletions sound/soc/mediatek/mt8195/mt8195-dai-pcm.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -80,8 +80,15 @@ static const struct snd_soc_dapm_widget mtk_dai_pcm_widgets[] = {
mtk_dai_pcm_o001_mix,
ARRAY_SIZE(mtk_dai_pcm_o001_mix)),

SND_SOC_DAPM_SUPPLY("PCM_EN", PCM_INTF_CON1,
PCM_INTF_CON1_PCM_EN_SHIFT, 0, NULL, 0),

SND_SOC_DAPM_INPUT("PCM1_INPUT"),
SND_SOC_DAPM_OUTPUT("PCM1_OUTPUT"),

SND_SOC_DAPM_CLOCK_SUPPLY("aud_asrc11"),
SND_SOC_DAPM_CLOCK_SUPPLY("aud_asrc12"),
SND_SOC_DAPM_CLOCK_SUPPLY("aud_pcmif"),
};

static const struct snd_soc_dapm_route mtk_dai_pcm_routes[] = {
Expand All @@ -97,22 +104,18 @@ static const struct snd_soc_dapm_route mtk_dai_pcm_routes[] = {
{"PCM1 Playback", NULL, "O000"},
{"PCM1 Playback", NULL, "O001"},

{"PCM1 Playback", NULL, "PCM_EN"},
{"PCM1 Playback", NULL, "aud_asrc12"},
{"PCM1 Playback", NULL, "aud_pcmif"},

{"PCM1 Capture", NULL, "PCM_EN"},
{"PCM1 Capture", NULL, "aud_asrc11"},
{"PCM1 Capture", NULL, "aud_pcmif"},

{"PCM1_OUTPUT", NULL, "PCM1 Playback"},
{"PCM1 Capture", NULL, "PCM1_INPUT"},
};

static void mtk_dai_pcm_enable(struct mtk_base_afe *afe)
{
regmap_update_bits(afe->regmap, PCM_INTF_CON1,
PCM_INTF_CON1_PCM_EN, PCM_INTF_CON1_PCM_EN);
}

static void mtk_dai_pcm_disable(struct mtk_base_afe *afe)
{
regmap_update_bits(afe->regmap, PCM_INTF_CON1,
PCM_INTF_CON1_PCM_EN, 0x0);
}

static int mtk_dai_pcm_configure(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
Expand Down Expand Up @@ -207,54 +210,22 @@ static int mtk_dai_pcm_configure(struct snd_pcm_substream *substream,
}

/* dai ops */
static int mtk_dai_pcm_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
struct mt8195_afe_private *afe_priv = afe->platform_priv;

if (dai->component->active)
return 0;

mt8195_afe_enable_clk(afe, afe_priv->clk[MT8195_CLK_AUD_ASRC11]);
mt8195_afe_enable_clk(afe, afe_priv->clk[MT8195_CLK_AUD_ASRC12]);
mt8195_afe_enable_clk(afe, afe_priv->clk[MT8195_CLK_AUD_PCMIF]);

return 0;
}

static void mtk_dai_pcm_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
struct mt8195_afe_private *afe_priv = afe->platform_priv;

if (dai->component->active)
return;

mtk_dai_pcm_disable(afe);

mt8195_afe_disable_clk(afe, afe_priv->clk[MT8195_CLK_AUD_PCMIF]);
mt8195_afe_disable_clk(afe, afe_priv->clk[MT8195_CLK_AUD_ASRC12]);
mt8195_afe_disable_clk(afe, afe_priv->clk[MT8195_CLK_AUD_ASRC11]);
}

static int mtk_dai_pcm_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
int ret = 0;
int ret;

if (snd_soc_dai_stream_active(dai, SNDRV_PCM_STREAM_PLAYBACK) &&
snd_soc_dai_stream_active(dai, SNDRV_PCM_STREAM_CAPTURE))
dev_dbg(dai->dev, "%s(), id %d, stream %d, widget active p %d, c %d\n",
__func__, dai->id, substream->stream,
dai->playback_widget->active, dai->capture_widget->active);

if (dai->playback_widget->active || dai->capture_widget->active)
return 0;

ret = mtk_dai_pcm_configure(substream, dai);
if (ret)
return ret;

mtk_dai_pcm_enable(afe);

return 0;
}

Expand Down Expand Up @@ -316,8 +287,6 @@ static int mtk_dai_pcm_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
}

static const struct snd_soc_dai_ops mtk_dai_pcm_ops = {
.startup = mtk_dai_pcm_startup,
.shutdown = mtk_dai_pcm_shutdown,
.prepare = mtk_dai_pcm_prepare,
.set_fmt = mtk_dai_pcm_set_fmt,
};
Expand Down
1 change: 1 addition & 0 deletions sound/soc/mediatek/mt8195/mt8195-reg.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2550,6 +2550,7 @@
#define PCM_INTF_CON1_PCM_FMT(x) (((x) & 0x3) << 1)
#define PCM_INTF_CON1_PCM_FMT_MASK (0x3 << 1)
#define PCM_INTF_CON1_PCM_EN BIT(0)
#define PCM_INTF_CON1_PCM_EN_SHIFT 0

/* PCM_INTF_CON2 */
#define PCM_INTF_CON2_CLK_DOMAIN_SEL(x) (((x) & 0x3) << 23)
Expand Down

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