ASoC: soc-pcm: add soc_get_playback_capture() and simplify soc_new_pcm()

soc_new_pcm() implementation is very long / verbose / complex,
thus, it is very difficult to read.
If we read it carefully, we can notice that it is consisted by

	int soc_new_pcm(...)
	{
		(1) judging playback/caputre part
		(2) creating the PCM part
		(3) setup pcm/rtd part
	}

This patch adds new soc_get_playback_capture() for (1) part
and offload it from soc_new_pcm().

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/877do5aign.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index d5f1f65..46818b3 100644 (file)
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -2631,15 +2631,11 @@ open_end:
        return ret;
 }
 
-/* create a new pcm */
-int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
+static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
+                                   int *playback, int *capture)
 {
        struct snd_soc_dai *codec_dai;
        struct snd_soc_dai *cpu_dai;
-       struct snd_soc_component *component;
-       struct snd_pcm *pcm;
-       char new_name[64];
-       int ret = 0, playback = 0, capture = 0;
        int stream;
        int i;
 
@@ -2655,12 +2651,11 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 
                        for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
                                if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
-                                       playback = 1;
+                                       *playback = 1;
                                        break;
                                }
                        }
-
-                       if (!playback) {
+                       if (!*playback) {
                                dev_err(rtd->card->dev,
                                        "No CPU DAIs support playback for stream %s\n",
                                        rtd->dai_link->stream_name);
@@ -2672,12 +2667,12 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 
                        for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
                                if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
-                                       capture = 1;
+                                       *capture = 1;
                                        break;
                                }
                        }
 
-                       if (!capture) {
+                       if (!*capture) {
                                dev_err(rtd->card->dev,
                                        "No CPU DAIs support capture for stream %s\n",
                                        rtd->dai_link->stream_name);
@@ -2704,23 +2699,39 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 
                        if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
                            snd_soc_dai_stream_valid(cpu_dai,   cpu_playback))
-                               playback = 1;
+                               *playback = 1;
                        if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
                            snd_soc_dai_stream_valid(cpu_dai,   cpu_capture))
-                               capture = 1;
+                               *capture = 1;
                }
        }
 
        if (rtd->dai_link->playback_only) {
-               playback = 1;
-               capture = 0;
+               *playback = 1;
+               *capture = 0;
        }
 
        if (rtd->dai_link->capture_only) {
-               playback = 0;
-               capture = 1;
+               *playback = 0;
+               *capture = 1;
        }
 
+       return 0;
+}
+
+/* create a new pcm */
+int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
+{
+       struct snd_soc_component *component;
+       struct snd_pcm *pcm;
+       char new_name[64];
+       int ret = 0, playback = 0, capture = 0;
+       int i;
+
+       ret = soc_get_playback_capture(rtd, &playback, &capture);
+       if (ret < 0)
+               return ret;
+
        /* create the PCM */
        if (rtd->dai_link->params) {
                snprintf(new_name, sizeof(new_name), "codec2codec(%s)",