change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/sound/soc/soc-pcm.c
..
..
@@ -2336,6 +2336,9 @@
2336
2336
 		if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2337
2337
 			continue;
2338
2338
 
2339
+		if (!snd_soc_dpcm_can_be_prepared(fe, be, stream))
2340
+			continue;
2341
+
2339
2342
 		if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2340
2343
 		    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2341
2344
 		    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
..
..
@@ -2978,3 +2981,20 @@
2978
2981
 	return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
2979
2982
 }
2980
2983
 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2984
+
2985
+/*
2986
+ * We can only prepare a BE DAI if any of it's FE are not prepared,
2987
+ * running or paused for the specified stream direction.
2988
+ */
2989
+int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
2990
+				 struct snd_soc_pcm_runtime *be, int stream)
2991
+{
2992
+	const enum snd_soc_dpcm_state state[] = {
2993
+		SND_SOC_DPCM_STATE_START,
2994
+		SND_SOC_DPCM_STATE_PAUSED,
2995
+		SND_SOC_DPCM_STATE_PREPARE,
2996
+	};
2997
+
2998
+	return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
2999
+}
3000
+EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared);