From fd69dfe6789f4ed46d1fdb52e223cff83946d997 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Wed, 21 Aug 2024 02:13:56 +0000 Subject: ASoC: soc-pcm: Indicate warning if dpcm_playback/capture were used for availability limition I have been wondering why DPCM needs special flag (= dpcm_playback/capture) to use it. Below is the history why it was added to ASoC. (A) In beginning, there was no dpcm_xxx flag on ASoC. It checks channels_min for DPCM, same as current non-DPCM. Let's name it as "validation check" here. if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { if (cpu_dai->driver->playback.channels_min) playback = 1; if (cpu_dai->driver->capture.channels_min) capture = 1; (B) commit 1e9de42f4324 ("ASoC: dpcm: Explicitly set BE DAI link supported stream directions") force to use dpcm_xxx flag on DPCM. According to this commit log, this is because "Some BE dummy DAI doesn't set channels_min for playback/capture". But we don't know which DAI is it, and not know why it can't/don't have channels_min. Let's name it as "no_chan_DAI" here. According to the code and git-log, it is used as DCPM-BE and is CPU DAI. I think the correct solution was set channels_min on "no_chan_DAI" side, not update ASoC framework side. But everything is under smoke today. if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { playback = rtd->dai_link->dpcm_playback; capture = rtd->dai_link->dpcm_capture; (C) commit 9b5db059366a ("ASoC: soc-pcm: dpcm: Only allow playback/capture if supported") checks channels_min (= validation check) again. Because DPCM availability was handled by dpcm_xxx flag at that time, but some Sound Card set it even though it wasn't available. Clearly there's a contradiction here. I think correct solution was update Sound Card side instead of ASoC framework. Sound Card side will be updated to handle this issue later (commit 25612477d20b ("ASoC: soc-dai: set dai_link dpcm_ flags with a helper")) if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { ... playback = rtd->dai_link->dpcm_playback && snd_soc_dai_stream_valid(cpu_dai, ...); capture = rtd->dai_link->dpcm_capture && snd_soc_dai_stream_valid(cpu_dai, ...); This (C) patch should have broken "no_chan_DAI" which doesn't have channels_min, but there was no such report during this 4 years. Possibilities case are as follows - No one is using "no_chan_DAI" - "no_chan_DAI" is no longer exist : was removed ? - "no_chan_DAI" is no longer exist : has channels_min ? Because of these history, this dpcm_xxx is unneeded flag today. But because we have been used it for 10 years since (B), it may have been used differently. For example some DAI available both playback/capture, but it set dpcm_playback flag only, in this case dpcm_xxx flag is used as availability limitation. We can use playback_only flag instead in this case, but it is very difficult to find such DAI today. Let's add grace time to remove dpcm_playback/capture flag. This patch don't use dpcm_xxx flag anymore, and indicates warning to use xxx_only flag if both playback/capture were available but using only one of dpcm_xxx flag, and not using xxx_only flag. Link: https://lore.kernel.org/r/87edaym2cg.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Kuninori Morimoto Tested-by: Jerome Brunet Link: https://patch.msgid.link/87seuyaahn.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown --- include/sound/soc.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/sound/soc.h b/include/sound/soc.h index e844f6afc5b5..81ef380b2e06 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -815,6 +815,7 @@ struct snd_soc_dai_link { /* This DAI link can route to other DAI links at runtime (Frontend)*/ unsigned int dynamic:1; + /* REMOVE ME */ /* DPCM capture and Playback support */ unsigned int dpcm_capture:1; unsigned int dpcm_playback:1; -- cgit v1.2.3 From 12806510481497a01d01edd64d7bb53a4d9ec28d Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Wed, 21 Aug 2024 02:14:02 +0000 Subject: ASoC: remove snd_soc_dai_link_set_capabilities() dpcm_xxx flags are no longer needed. We need to use xxx_only flags instead if needed, but snd_soc_dai_link_set_capabilities() user adds dpcm_xxx if playback/capture were available. Thus converting dpcm_xxx to xxx_only is not needed. Just remove it. Signed-off-by: Kuninori Morimoto Tested-by: Jerome Brunet Link: https://patch.msgid.link/87r0aiaahh.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown --- include/sound/soc-dai.h | 1 - sound/soc/fsl/imx-card.c | 3 --- sound/soc/generic/audio-graph-card.c | 2 -- sound/soc/generic/audio-graph-card2.c | 2 -- sound/soc/generic/simple-card.c | 2 -- sound/soc/meson/axg-card.c | 1 - sound/soc/meson/gx-card.c | 1 - sound/soc/qcom/common.c | 1 - sound/soc/soc-dai.c | 38 ----------------------------------- 9 files changed, 51 deletions(-) (limited to 'include') diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h index ab4e109fe71d..0d1b215f24f4 100644 --- a/include/sound/soc-dai.h +++ b/include/sound/soc-dai.h @@ -219,7 +219,6 @@ void snd_soc_dai_resume(struct snd_soc_dai *dai); int snd_soc_dai_compress_new(struct snd_soc_dai *dai, struct snd_soc_pcm_runtime *rtd, int num); bool snd_soc_dai_stream_valid(const struct snd_soc_dai *dai, int stream); -void snd_soc_dai_link_set_capabilities(struct snd_soc_dai_link *dai_link); void snd_soc_dai_action(struct snd_soc_dai *dai, int stream, int action); static inline void snd_soc_dai_activate(struct snd_soc_dai *dai, diff --git a/sound/soc/fsl/imx-card.c b/sound/soc/fsl/imx-card.c index 0e18ccabe28c..98b37dd2b901 100644 --- a/sound/soc/fsl/imx-card.c +++ b/sound/soc/fsl/imx-card.c @@ -650,9 +650,6 @@ static int imx_card_parse_of(struct imx_card_data *data) link->ops = &imx_aif_ops; } - if (link->no_pcm || link->dynamic) - snd_soc_dai_link_set_capabilities(link); - /* Get dai fmt */ ret = simple_util_parse_daifmt(dev, np, codec, NULL, &link->dai_fmt); diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c index 3425fbbcbd7e..1bdcfc4d4222 100644 --- a/sound/soc/generic/audio-graph-card.c +++ b/sound/soc/generic/audio-graph-card.c @@ -279,8 +279,6 @@ static int graph_dai_link_of_dpcm(struct simple_util_priv *priv, graph_parse_convert(dev, ep, &dai_props->adata); - snd_soc_dai_link_set_capabilities(dai_link); - ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name); li->link++; diff --git a/sound/soc/generic/audio-graph-card2.c b/sound/soc/generic/audio-graph-card2.c index 56f7f946882e..051adb567397 100644 --- a/sound/soc/generic/audio-graph-card2.c +++ b/sound/soc/generic/audio-graph-card2.c @@ -966,8 +966,6 @@ int audio_graph2_link_dpcm(struct simple_util_priv *priv, graph_parse_convert(ep, dai_props); /* at node of */ graph_parse_convert(rep, dai_props); /* at node of */ - snd_soc_dai_link_set_capabilities(dai_link); - graph_link_init(priv, lnk, cpu_port, codec_port, li, is_cpu); err: of_node_put(ep); diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c index d2588f1ea54e..42c60b92cca5 100644 --- a/sound/soc/generic/simple-card.c +++ b/sound/soc/generic/simple-card.c @@ -291,8 +291,6 @@ static int simple_dai_link_of_dpcm(struct simple_util_priv *priv, simple_parse_convert(dev, np, &dai_props->adata); - snd_soc_dai_link_set_capabilities(dai_link); - ret = simple_link_init(priv, np, codec, li, prefix, dai_name); out_put_node: diff --git a/sound/soc/meson/axg-card.c b/sound/soc/meson/axg-card.c index 8c5605c1e34e..09aa36e94c85 100644 --- a/sound/soc/meson/axg-card.c +++ b/sound/soc/meson/axg-card.c @@ -339,7 +339,6 @@ static int axg_card_add_link(struct snd_soc_card *card, struct device_node *np, dai_link->num_c2c_params = 1; } else { dai_link->no_pcm = 1; - snd_soc_dai_link_set_capabilities(dai_link); if (axg_card_cpu_is_tdm_iface(dai_link->cpus->of_node)) ret = axg_card_parse_tdm(card, np, index); } diff --git a/sound/soc/meson/gx-card.c b/sound/soc/meson/gx-card.c index f1539e542638..7edca3e49c8f 100644 --- a/sound/soc/meson/gx-card.c +++ b/sound/soc/meson/gx-card.c @@ -107,7 +107,6 @@ static int gx_card_add_link(struct snd_soc_card *card, struct device_node *np, dai_link->num_c2c_params = 1; } else { dai_link->no_pcm = 1; - snd_soc_dai_link_set_capabilities(dai_link); /* Check if the cpu is the i2s encoder and parse i2s data */ if (gx_card_cpu_identify(dai_link->cpus, "I2S Encoder")) ret = gx_card_parse_i2s(card, np, index); diff --git a/sound/soc/qcom/common.c b/sound/soc/qcom/common.c index 56b4a3654aec..928cf5cb5999 100644 --- a/sound/soc/qcom/common.c +++ b/sound/soc/qcom/common.c @@ -155,7 +155,6 @@ int qcom_snd_parse_of(struct snd_soc_card *card) if (platform || !codec) { /* DPCM */ - snd_soc_dai_link_set_capabilities(link); link->ignore_suspend = 1; link->nonatomic = 1; } diff --git a/sound/soc/soc-dai.c b/sound/soc/soc-dai.c index 302ca753a1f3..4e08892d24c6 100644 --- a/sound/soc/soc-dai.c +++ b/sound/soc/soc-dai.c @@ -479,44 +479,6 @@ bool snd_soc_dai_stream_valid(const struct snd_soc_dai *dai, int dir) return stream->channels_min; } -/* - * snd_soc_dai_link_set_capabilities() - set dai_link properties based on its DAIs - */ -void snd_soc_dai_link_set_capabilities(struct snd_soc_dai_link *dai_link) -{ - bool supported[SNDRV_PCM_STREAM_LAST + 1]; - int direction; - - for_each_pcm_streams(direction) { - struct snd_soc_dai_link_component *cpu; - struct snd_soc_dai_link_component *codec; - struct snd_soc_dai *dai; - bool supported_cpu = false; - bool supported_codec = false; - int i; - - for_each_link_cpus(dai_link, i, cpu) { - dai = snd_soc_find_dai_with_mutex(cpu); - if (dai && snd_soc_dai_stream_valid(dai, direction)) { - supported_cpu = true; - break; - } - } - for_each_link_codecs(dai_link, i, codec) { - dai = snd_soc_find_dai_with_mutex(codec); - if (dai && snd_soc_dai_stream_valid(dai, direction)) { - supported_codec = true; - break; - } - } - supported[direction] = supported_cpu && supported_codec; - } - - dai_link->dpcm_playback = supported[SNDRV_PCM_STREAM_PLAYBACK]; - dai_link->dpcm_capture = supported[SNDRV_PCM_STREAM_CAPTURE]; -} -EXPORT_SYMBOL_GPL(snd_soc_dai_link_set_capabilities); - void snd_soc_dai_action(struct snd_soc_dai *dai, int stream, int action) { -- cgit v1.2.3