ASoC: soc-pcm: makes snd_soc_dpcm_can_be_xxx() local function

No driver is calling snd_soc_dpcm_can_be_xxx() functions. We don't need
to have EXPORT_SYMBOL_GPL() for them. Let's makes it static function.
One note is that snd_soc_dpcm_fe_can_update() is not used in upstream.
Use #if-endif and keep it for future support.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://patch.msgid.link/87h6b6df7e.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc-dpcm.h

@@ -113,24 +113,6 @@ struct snd_soc_dpcm_runtime {
 #define for_each_dpcm_be_rollback(fe, stream, _dpcm)			\
 	list_for_each_entry_continue_reverse(_dpcm, &(fe)->dpcm[stream].be_clients, list_be)
 
-/* can this BE stop and free */
-int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
-		struct snd_soc_pcm_runtime *be, int stream);
-
-/* can this BE perform a hw_params() */
-int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
-		struct snd_soc_pcm_runtime *be, int stream);
-
-/* can this BE perform prepare */
-int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
-				 struct snd_soc_pcm_runtime *be, int stream);
-
-/* is the current PCM operation for this FE ? */
-int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream);
-
-/* is the current PCM operation for this BE ? */
-int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
-		struct snd_soc_pcm_runtime *be, int stream);
 
 /* get the substream for this BE */
 struct snd_pcm_substream *

sound/soc/soc-pcm.c

@@ -50,16 +50,17 @@ static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd,
 }
 
 /* is the current PCM operation for this FE ? */
-int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
+#if 0
+static int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
 {
 	if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
 		return 1;
 	return 0;
 }
-EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
+#endif
 
 /* is the current PCM operation for this BE ? */
-int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
+static int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
 			       struct snd_soc_pcm_runtime *be, int stream)
 {
 	if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
@@ -68,7 +69,6 @@ int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
 		return 1;
 	return 0;
 }
-EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
 
 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
 				    struct snd_soc_pcm_runtime *be,
@@ -103,8 +103,8 @@ static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
  * are not running, paused or suspended for the specified stream direction.
  */
-int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
-				  struct snd_soc_pcm_runtime *be, int stream)
+static int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
+					 struct snd_soc_pcm_runtime *be, int stream)
 {
 	const enum snd_soc_dpcm_state state[] = {
 		SND_SOC_DPCM_STATE_START,
@@ -114,14 +114,13 @@ int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
 
 	return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
 }
-EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
 
 /*
  * We can only change hw params a BE DAI if any of it's FE are not prepared,
  * running, paused or suspended for the specified stream direction.
  */
-int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
-			       struct snd_soc_pcm_runtime *be, int stream)
+static int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
+				      struct snd_soc_pcm_runtime *be, int stream)
 {
 	const enum snd_soc_dpcm_state state[] = {
 		SND_SOC_DPCM_STATE_START,
@@ -132,14 +131,13 @@ int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
 
 	return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
 }
-EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
 
 /*
  * We can only prepare a BE DAI if any of it's FE are not prepared,
  * running or paused for the specified stream direction.
  */
-int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
-				 struct snd_soc_pcm_runtime *be, int stream)
+static int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
+					struct snd_soc_pcm_runtime *be, int stream)
 {
 	const enum snd_soc_dpcm_state state[] = {
 		SND_SOC_DPCM_STATE_START,
@@ -149,7 +147,6 @@ int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
 
 	return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
 }
-EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared);
 
 #define DPCM_MAX_BE_USERS	8