ASoC: expand snd_soc_dpcm_mutex_lock/unlock()

soc-pcm.c has snd_soc_dpcm_mutex_lock/unlock(),
but other files can't use it because it is static function.

It requests snd_soc_pcm_runtime as parameter (A), but sometimes we
want to use it by snd_soc_card (B).

(A) static inline void snd_soc_dpcm_mutex_lock(struct snd_soc_pcm_runtime *rtd)
{
mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
} ^^^^^^^^^

(B) mutex_lock_nested(&card->pcm_mutex, card->pcm_subclass);
^^^^

We want to use it with both "rtd" and "card" for dapm lock/unlock.
To enable it, this patch uses _Generic macro.

This patch makes snd_soc_dpcm_mutex_{un}lock() global function, and use it on
each files.

Signed-off-by: Kuninori Morimoto <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

include/sound/soc.h

···
 	struct snd_soc_card * :		_snd_soc_dapm_mutex_assert_held_c, \
 	struct snd_soc_dapm_context * :	_snd_soc_dapm_mutex_assert_held_d)(x)
 
+/*
+ *	PCM helper functions
+ */
+static inline void _snd_soc_dpcm_mutex_lock_c(struct snd_soc_card *card)
+{
+	mutex_lock_nested(&card->pcm_mutex, card->pcm_subclass);
+}
+
+static inline void _snd_soc_dpcm_mutex_unlock_c(struct snd_soc_card *card)
+{
+	mutex_unlock(&card->pcm_mutex);
+}
+
+static inline void _snd_soc_dpcm_mutex_assert_held_c(struct snd_soc_card *card)
+{
+	lockdep_assert_held(&card->pcm_mutex);
+}
+
+static inline void _snd_soc_dpcm_mutex_lock_r(struct snd_soc_pcm_runtime *rtd)
+{
+	_snd_soc_dpcm_mutex_lock_c(rtd->card);
+}
+
+static inline void _snd_soc_dpcm_mutex_unlock_r(struct snd_soc_pcm_runtime *rtd)
+{
+	_snd_soc_dpcm_mutex_unlock_c(rtd->card);
+}
+
+static inline void _snd_soc_dpcm_mutex_assert_held_r(struct snd_soc_pcm_runtime *rtd)
+{
+	_snd_soc_dpcm_mutex_assert_held_c(rtd->card);
+}
+
+#define snd_soc_dpcm_mutex_lock(x) _Generic((x),			\
+	 struct snd_soc_card * :	_snd_soc_dpcm_mutex_lock_c,	\
+	 struct snd_soc_pcm_runtime * :	_snd_soc_dpcm_mutex_lock_r)(x)
+
+#define snd_soc_dpcm_mutex_unlock(x) _Generic((x),			\
+	 struct snd_soc_card * :	_snd_soc_dpcm_mutex_unlock_c,	\
+	 struct snd_soc_pcm_runtime * :	_snd_soc_dpcm_mutex_unlock_r)(x)
+
+#define snd_soc_dpcm_mutex_assert_held(x) _Generic((x),		\
+	struct snd_soc_card * :		_snd_soc_dpcm_mutex_assert_held_c, \
+	struct snd_soc_pcm_runtime * :	_snd_soc_dpcm_mutex_assert_held_r)(x)
+
 #include <sound/soc-component.h>
 #include <sound/soc-card.h>
 #include <sound/soc-jack.h>

sound/soc/soc-component.c

···
 	struct snd_soc_component *component;
 	int i, ret = 0;
 
-	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(rtd);
 
 	for_each_rtd_components(rtd, i, component) {
 		if (component->driver->compress_ops &&
···
 		}
 	}
 
-	mutex_unlock(&rtd->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(rtd);
 
 	return soc_component_ret(component, ret);
 }
···
 	struct snd_soc_component *component;
 	int i, ret = 0;
 
-	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(rtd);
 
 	for_each_rtd_components(rtd, i, component) {
 		if (component->driver->compress_ops &&
···
 		}
 	}
 
-	mutex_unlock(&rtd->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(rtd);
 
 	return soc_component_ret(component, ret);
 }
···
 	struct snd_soc_component *component;
 	int i, ret = 0;
 
-	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(rtd);
 
 	for_each_rtd_components(rtd, i, component) {
 		if (component->driver->compress_ops &&
···
 		}
 	}
 
-	mutex_unlock(&rtd->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(rtd);
 
 	return soc_component_ret(component, ret);
 }

sound/soc/soc-compress.c

···
 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
 	int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */
 
-	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(rtd);
 
 	if (!rollback)
 		snd_soc_runtime_deactivate(rtd, stream);
···
 	if (!rollback)
 		snd_soc_dapm_stream_stop(rtd, stream);
 
-	mutex_unlock(&rtd->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(rtd);
 
 	snd_soc_pcm_component_pm_runtime_put(rtd, cstream, rollback);
 
···
 	if (ret < 0)
 		goto err_no_lock;
 
-	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(rtd);
 
 	ret = snd_soc_dai_compr_startup(cpu_dai, cstream);
 	if (ret < 0)
···
 
 	snd_soc_runtime_activate(rtd, stream);
 err:
-	mutex_unlock(&rtd->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(rtd);
 err_no_lock:
 	if (ret < 0)
 		soc_compr_clean(cstream, 1);
···
 	if (ret < 0)
 		goto be_err;
 
-	mutex_lock_nested(&fe->card->pcm_mutex, fe->card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(fe);
 
 	/* calculate valid and active FE <-> BE dpcms */
 	dpcm_process_paths(fe, stream, &list, 1);
···
 	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 
 	snd_soc_runtime_activate(fe, stream);
-	mutex_unlock(&fe->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(fe);
 
 	mutex_unlock(&fe->card->mutex);
 
···
 
 	mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
 
-	mutex_lock_nested(&fe->card->pcm_mutex, fe->card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(fe);
 	snd_soc_runtime_deactivate(fe, stream);
 
 	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
···
 
 	dpcm_be_disconnect(fe, stream);
 
-	mutex_unlock(&fe->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(fe);
 
 	snd_soc_link_compr_shutdown(cstream, 0);
 
···
 	int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */
 	int ret;
 
-	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(rtd);
 
 	ret = snd_soc_component_compr_trigger(cstream, cmd);
 	if (ret < 0)
···
 	}
 
 out:
-	mutex_unlock(&rtd->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(rtd);
 	return ret;
 }
 
···
 	int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */
 	int ret;
 
-	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(rtd);
 
 	/*
 	 * First we call set_params for the CPU DAI, then the component
···
 
 	/* cancel any delayed stream shutdown that is pending */
 	rtd->pop_wait = 0;
-	mutex_unlock(&rtd->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(rtd);
 
 	cancel_delayed_work_sync(&rtd->delayed_work);
 
 	return 0;
 
 err:
-	mutex_unlock(&rtd->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(rtd);
 	return ret;
 }
 
···
 	ret = snd_soc_link_compr_set_params(cstream);
 	if (ret < 0)
 		goto out;
-	mutex_lock_nested(&fe->card->pcm_mutex, fe->card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(fe);
 	dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
-	mutex_unlock(&fe->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(fe);
 	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
 
 out:
···
 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 	int ret = 0;
 
-	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(rtd);
 
 	ret = snd_soc_dai_compr_get_params(cpu_dai, cstream, params);
 	if (ret < 0)
···
 
 	ret = snd_soc_component_compr_get_params(cstream, params);
 err:
-	mutex_unlock(&rtd->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(rtd);
 	return ret;
 }
 
···
 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 	int ret;
 
-	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(rtd);
 
 	ret = snd_soc_dai_compr_ack(cpu_dai, cstream, bytes);
 	if (ret < 0)
···
 
 	ret = snd_soc_component_compr_ack(cstream, bytes);
 err:
-	mutex_unlock(&rtd->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(rtd);
 	return ret;
 }
 
···
 	int ret;
 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 
-	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(rtd);
 
 	ret = snd_soc_dai_compr_pointer(cpu_dai, cstream, tstamp);
 	if (ret < 0)
···
 
 	ret = snd_soc_component_compr_pointer(cstream, tstamp);
 out:
-	mutex_unlock(&rtd->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(rtd);
 	return ret;
 }
 

sound/soc/soc-core.c

···
 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
 	int playback = SNDRV_PCM_STREAM_PLAYBACK;
 
-	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(rtd);
 
 	dev_dbg(rtd->dev,
 		"ASoC: pop wq checking: %s status: %s waiting: %s\n",
···
 					  SND_SOC_DAPM_STREAM_STOP);
 	}
 
-	mutex_unlock(&rtd->card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(rtd);
 }
 EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
 

sound/soc/soc-pcm.c

···
 	return ret;
 }
 
-static inline void snd_soc_dpcm_mutex_lock(struct snd_soc_pcm_runtime *rtd)
-{
-	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
-}
-
-static inline void snd_soc_dpcm_mutex_unlock(struct snd_soc_pcm_runtime *rtd)
-{
-	mutex_unlock(&rtd->card->pcm_mutex);
-}
-
-#define snd_soc_dpcm_mutex_assert_held(rtd) \
-	lockdep_assert_held(&(rtd)->card->pcm_mutex)
-
 static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd,
 						int stream)
 {
···
 	struct snd_soc_pcm_runtime *fe;
 	int ret = 0;
 
-	mutex_lock_nested(&card->pcm_mutex, card->pcm_subclass);
+	snd_soc_dpcm_mutex_lock(card);
 	/* shutdown all old paths first */
 	for_each_card_rtds(card, fe) {
 		ret = soc_dpcm_fe_runtime_update(fe, 0);
···
 	}
 
 out:
-	mutex_unlock(&card->pcm_mutex);
+	snd_soc_dpcm_mutex_unlock(card);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);