ASoC: soc-dpcm.h: remove snd_soc_dpcm::hw_param

Current soc-pcm.c is coping fe hw_param to dpcm->hw_param (A),
fixup it (B), and copy it to be (C).

	int dpcm_be_dai_hw_params(...)
	{
		...
		for_each_dpcm_be(fe, stream, dpcm) {
			...
			/* copy params for each dpcm */
(A)			memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, ...) ;

			/* perform any hw_params fixups */
(B)			ret = snd_soc_link_be_hw_params_fixup(be, &dpcm->hw_params);
			...

			/* copy the fixed-up hw params for BE dai */
(C)			memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params, ...);
			...
		}
		...
	}

But here, (1) it is coping hw_params without caring stream (Playback/Capture),
(2) we can get same value from be. We don't need to have dpcm->hw_params.
This patch removes it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Link: https://lore.kernel.org/r/87v8ogsl6h.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc-dpcm.h

@@ -78,8 +78,6 @@ struct snd_soc_dpcm {
 	struct list_head list_be;
 	struct list_head list_fe;
 
-	/* hw params for this link - may be different for each link */
-	struct snd_pcm_hw_params hw_params;
 #ifdef CONFIG_DEBUG_FS
 	struct dentry *debugfs_state;
 #endif

sound/soc/sh/rcar/core.c

@@ -1518,7 +1518,8 @@ static int rsnd_hw_params(struct snd_soc_component *component,
 		int stream = substream->stream;
 
 		for_each_dpcm_be(fe, stream, dpcm) {
-			struct snd_pcm_hw_params *be_params = &dpcm->hw_params;
+			struct snd_soc_pcm_runtime *be = dpcm->be;
+			struct snd_pcm_hw_params *be_params = &be->dpcm[stream].hw_params;
 
 			if (params_channels(hw_params) != params_channels(be_params))
 				io->converted_chan = params_channels(be_params);

sound/soc/soc-pcm.c

@@ -155,7 +155,7 @@ static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
 
 	for_each_dpcm_be(fe, stream, dpcm) {
 		struct snd_soc_pcm_runtime *be = dpcm->be;
-		params = &dpcm->hw_params;
+		params = &be->dpcm[stream].hw_params;
 
 		offset += scnprintf(buf + offset, size - offset,
 				   "- %s\n", be->dai_link->name);
@@ -1980,6 +1980,8 @@ int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
 	int ret;
 
 	for_each_dpcm_be(fe, stream, dpcm) {
+		struct snd_pcm_hw_params hw_params;
+
 		be = dpcm->be;
 		be_substream = snd_soc_dpcm_get_substream(be, stream);
 
@@ -1988,16 +1990,16 @@ int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
 			continue;
 
 		/* copy params for each dpcm */
-		memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
+		memcpy(&hw_params, &fe->dpcm[stream].hw_params,
 				sizeof(struct snd_pcm_hw_params));
 
 		/* perform any hw_params fixups */
-		ret = snd_soc_link_be_hw_params_fixup(be, &dpcm->hw_params);
+		ret = snd_soc_link_be_hw_params_fixup(be, &hw_params);
 		if (ret < 0)
 			goto unwind;
 
 		/* copy the fixed-up hw params for BE dai */
-		memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
+		memcpy(&be->dpcm[stream].hw_params, &hw_params,
 		       sizeof(struct snd_pcm_hw_params));
 
 		/* only allow hw_params() if no connected FEs are running */
@@ -2012,7 +2014,7 @@ int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
 		dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
 			be->dai_link->name);
 
-		ret = __soc_pcm_hw_params(be, be_substream, &dpcm->hw_params);
+		ret = __soc_pcm_hw_params(be, be_substream, &hw_params);
 		if (ret < 0)
 			goto unwind;