ASoC: soc-pcm: add dpcm_runtime_setup()

dpcm_fe_dai_startup() (= A) calls dpcm_set_fe_runtime() (= B) to setup
DPCM runtime. From *naming point of view*, it sounds like setup function
for FE.

(A)	static int dpcm_fe_dai_startup(...)
	{
		...
(B)		dpcm_set_fe_runtime(...);
		...
	}

But in dpcm_set_fe_runtime() (= B),
It  setups FE by dpcm_runtime_setup_fe() (= X),
and setups BE by dpcm_runtime_merge_xxx() (= Y).

(B)	static void dpcm_set_fe_runtime(...)
	{
		...
(X)		dpcm_runtime_setup_fe(...);

 ^		dpcm_runtime_merge_format(...);
(Y)		dpcm_runtime_merge_chan(...);
 v		dpcm_runtime_merge_rate(...);
	}

These means that the function which is called as xxx_fe_xxx()
is setups both FE and BE. This is confusable and can be hot bed for bug.

This patch renames unclear dpcm_runtime_merge_xxx() (= Y) to
more clear dpcm_runtime_setup_be_xxx().
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87o8gdvsgr.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-pcm.c

@@ -1556,10 +1556,10 @@ static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream)
 
 }
 
-static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
-				      struct snd_pcm_runtime *runtime)
+static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_pcm_hardware *hw = &runtime->hw;
 	struct snd_soc_dpcm *dpcm;
 	struct snd_soc_dai *dai;
@@ -1593,10 +1593,10 @@ static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
 	}
 }
 
-static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
-				    struct snd_pcm_runtime *runtime)
+static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_pcm_hardware *hw = &runtime->hw;
 	struct snd_soc_dpcm *dpcm;
 	int stream = substream->stream;
@@ -1641,10 +1641,10 @@ static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
 	}
 }
 
-static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
-				    struct snd_pcm_runtime *runtime)
+static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_pcm_hardware *hw = &runtime->hw;
 	struct snd_soc_dpcm *dpcm;
 	int stream = substream->stream;
@@ -1680,13 +1680,11 @@ static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
 
 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
 {
-	struct snd_pcm_runtime *runtime = substream->runtime;
-
 	dpcm_runtime_setup_fe(substream);
 
-	dpcm_runtime_merge_format(substream, runtime);
-	dpcm_runtime_merge_chan(substream, runtime);
-	dpcm_runtime_merge_rate(substream, runtime);
+	dpcm_runtime_setup_be_format(substream);
+	dpcm_runtime_setup_be_chan(substream);
+	dpcm_runtime_setup_be_rate(substream);
 }
 
 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,