From dcf084247e376b35c139c922d30917f4ff716a4c Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Wed, 22 Mar 2023 01:12:24 +0000 Subject: [PATCH] ASoC: simple-card: add comment to indicate don't remove platforms Basically CPU and Platform are different Component, but if CPU is using soc-generic-dmaengine-pcm, same dev will be shared between CPU and Platform, and Simple Card had been supporting it. When we focus to clean up Simple Card driver, we tend to remove platforms if no Platform was selected, but it is wrong because of above reasons. This patch adds comment why we shouldn't remove platforms. In case of CPU is not using soc-generic-dmaengine-pcm, CPU and Platform will be duplicated, but it will be ignored by snd_soc_rtd_add_component(). Signed-off-by: Kuninori Morimoto Link: https://lore.kernel.org/r/875yattwqv.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown --- sound/soc/generic/audio-graph-card.c | 13 ++++++++++++- sound/soc/generic/audio-graph-card2.c | 17 +++++++++++++++++ sound/soc/generic/simple-card-utils.c | 11 ++++++++++- sound/soc/generic/simple-card.c | 22 +++++++++++++++++++++- 4 files changed, 60 insertions(+), 3 deletions(-) diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c index d788f5f23a8ac..4e85536a1b261 100644 --- a/sound/soc/generic/audio-graph-card.c +++ b/sound/soc/generic/audio-graph-card.c @@ -613,10 +613,16 @@ static int graph_count_noml(struct asoc_simple_priv *priv, return -EINVAL; } + /* + * DON'T REMOVE platforms + * see + * simple-card.c :: simple_count_noml() + */ li->num[li->link].cpus = 1; - li->num[li->link].codecs = 1; li->num[li->link].platforms = 1; + li->num[li->link].codecs = 1; + li->link += 1; /* 1xCPU-Codec */ dev_dbg(dev, "Count As Normal\n"); @@ -637,6 +643,11 @@ static int graph_count_dpcm(struct asoc_simple_priv *priv, } if (li->cpu) { + /* + * DON'T REMOVE platforms + * see + * simple-card.c :: simple_count_noml() + */ li->num[li->link].cpus = 1; li->num[li->link].platforms = 1; diff --git a/sound/soc/generic/audio-graph-card2.c b/sound/soc/generic/audio-graph-card2.c index 259544f64df91..d145b74d41e4d 100644 --- a/sound/soc/generic/audio-graph-card2.c +++ b/sound/soc/generic/audio-graph-card2.c @@ -1046,8 +1046,14 @@ static int graph_count_normal(struct asoc_simple_priv *priv, * => lnk: port { endpoint { .. }; }; * }; */ + /* + * DON'T REMOVE platforms + * see + * simple-card.c :: simple_count_noml() + */ li->num[li->link].cpus = li->num[li->link].platforms = graph_counter(cpu_port); + li->num[li->link].codecs = graph_counter(codec_port); of_node_put(cpu_ep); @@ -1079,6 +1085,11 @@ static int graph_count_dpcm(struct asoc_simple_priv *priv, */ if (asoc_graph_is_ports0(lnk)) { + /* + * DON'T REMOVE platforms + * see + * simple-card.c :: simple_count_noml() + */ li->num[li->link].cpus = graph_counter(rport); /* FE */ li->num[li->link].platforms = graph_counter(rport); } else { @@ -1113,8 +1124,14 @@ static int graph_count_c2c(struct asoc_simple_priv *priv, * }; * }; */ + /* + * DON'T REMOVE platforms + * see + * simple-card.c :: simple_count_noml() + */ li->num[li->link].cpus = li->num[li->link].platforms = graph_counter(codec0); + li->num[li->link].codecs = graph_counter(codec1); of_node_put(ports); diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c index 56552a616f21f..34a9b91e676f5 100644 --- a/sound/soc/generic/simple-card-utils.c +++ b/sound/soc/generic/simple-card-utils.c @@ -638,7 +638,16 @@ EXPORT_SYMBOL_GPL(asoc_simple_dai_init); void asoc_simple_canonicalize_platform(struct snd_soc_dai_link_component *platforms, struct snd_soc_dai_link_component *cpus) { - /* Assumes platform == cpu */ + /* + * Assumes Platform == CPU + * + * Some CPU might be using soc-generic-dmaengine-pcm. This means CPU and Platform + * are different Component, but are sharing same component->dev. + * + * Let's assume Platform is same as CPU if it doesn't identify Platform on DT. + * see + * simple-card.c :: simple_count_noml() + */ if (!platforms->of_node) platforms->of_node = cpus->of_node; } diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c index e98932c167542..fcd6c44f89f65 100644 --- a/sound/soc/generic/simple-card.c +++ b/sound/soc/generic/simple-card.c @@ -509,10 +509,25 @@ static int simple_count_noml(struct asoc_simple_priv *priv, return -EINVAL; } + /* + * DON'T REMOVE platforms + * + * Some CPU might be using soc-generic-dmaengine-pcm. This means CPU and Platform + * are different Component, but are sharing same component->dev. + * Simple Card had been supported it without special Platform selection. + * We need platforms here. + * + * In case of no Platform, it will be Platform == CPU, but Platform will be + * ignored by snd_soc_rtd_add_component(). + * + * see + * simple-card-utils.c :: asoc_simple_canonicalize_platform() + */ li->num[li->link].cpus = 1; - li->num[li->link].codecs = 1; li->num[li->link].platforms = 1; + li->num[li->link].codecs = 1; + li->link += 1; return 0; @@ -531,6 +546,11 @@ static int simple_count_dpcm(struct asoc_simple_priv *priv, } if (li->cpu) { + /* + * DON'T REMOVE platforms + * see + * simple_count_noml() + */ li->num[li->link].cpus = 1; li->num[li->link].platforms = 1; -- 2.30.2