diff mbox series

Applied "ASoC: core: Allow topology to override machine driver FE DAI link config." to the asoc tree

Message ID E1f8U6b-0001dQ-RJ@debutante
State Superseded
Headers show
Series Applied "ASoC: core: Allow topology to override machine driver FE DAI link config." to the asoc tree | expand

Commit Message

Mark Brown April 17, 2018, 5:09 p.m. UTC 
The patch

   ASoC: core: Allow topology to override machine driver FE DAI link config.

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

From 45f8cb57da0d7a9ead4b39d7f5def333a5b0c08b Mon Sep 17 00:00:00 2001
From: Liam Girdwood <liam.r.girdwood@linux.intel.com>

Date: Tue, 27 Mar 2018 14:30:40 +0100
Subject: [PATCH] ASoC: core: Allow topology to override machine driver FE DAI
 link config.

Machine drivers statically define a number of DAI links that currently
cannot be changed or removed by topology. This means PCMs and platform
components cannot be changed by topology at runtime AND machine drivers
are tightly coupled to topology.

This patch allows topology to override the machine driver DAI link config
in order to reuse machine drivers with different topologies and platform
components. The patch supports :-

1) create new FE PCMs with a topology defined PCM ID.
2) destroy existing static FE PCMs
3) change the platform component driver.
4) assign any new HW params fixups.

The patch requires no changes to the machine drivers, but does add some
platform component flags that the platform component driver can assign
before loading topologies.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>

Signed-off-by: Mark Brown <broonie@kernel.org>

---
 include/sound/soc.h  | 10 ++++++
 sound/soc/soc-core.c | 79 ++++++++++++++++++++++++++++++++++++++++++--
 sound/soc/soc-pcm.c  | 12 +++++++
 3 files changed, 98 insertions(+), 3 deletions(-)

-- 
2.17.0

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diff mbox series

Patch

diff --git a/include/sound/soc.h b/include/sound/soc.h
index ad266d7e9553..fac4ff04fb7d 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1012,6 +1012,13 @@  struct snd_soc_platform_driver {
 
 	/* platform stream compress ops */
 	const struct snd_compr_ops *compr_ops;
+
+	/* this platform uses topology and ignore machine driver FEs */
+	const char *ignore_machine;
+	int (*be_hw_params_fixup)(struct snd_soc_pcm_runtime *rtd,
+				  struct snd_pcm_hw_params *params);
+	bool use_dai_pcm_id;	/* use the DAI link PCM ID as PCM device number */
+	int be_pcm_base;	/* base device ID for all BE PCMs */
 };
 
 struct snd_soc_dai_link_component {
@@ -1118,6 +1125,9 @@  struct snd_soc_dai_link {
 	/* pmdown_time is ignored at stop */
 	unsigned int ignore_pmdown_time:1;
 
+	/* Do not create a PCM for this DAI link (Backend link) */
+	unsigned int ignore:1;
+
 	struct list_head list; /* DAI link list of the soc card */
 	struct snd_soc_dobj dobj; /* For topology */
 };
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index bf7ca32ab31f..8f01fe8296ff 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1050,6 +1050,9 @@  static int soc_bind_dai_link(struct snd_soc_card *card,
 	const char *platform_name;
 	int i;
 
+	if (dai_link->ignore)
+		return 0;
+
 	dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
 
 	if (soc_is_dai_link_bound(card, dai_link)) {
@@ -1672,7 +1675,7 @@  static int soc_probe_link_dais(struct snd_soc_card *card,
 {
 	struct snd_soc_dai_link *dai_link = rtd->dai_link;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-	int i, ret;
+	int i, ret, num;
 
 	dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
 			card->name, rtd->num, order);
@@ -1718,9 +1721,23 @@  static int soc_probe_link_dais(struct snd_soc_card *card,
 		soc_dpcm_debugfs_add(rtd);
 #endif
 
+	/*
+	 * most drivers will register their PCMs using DAI link ordering but
+	 * topology based drivers can use the DAI link id field to set PCM
+	 * device number and then use rtd + a base offset of the BEs.
+	 */
+	if (rtd->platform->driver->use_dai_pcm_id) {
+		if (rtd->dai_link->no_pcm)
+			num = rtd->platform->driver->be_pcm_base + rtd->num;
+		else
+			num = rtd->dai_link->id;
+	} else {
+		num = rtd->num;
+	}
+
 	if (cpu_dai->driver->compress_new) {
 		/*create compress_device"*/
-		ret = cpu_dai->driver->compress_new(rtd, rtd->num);
+		ret = cpu_dai->driver->compress_new(rtd, num);
 		if (ret < 0) {
 			dev_err(card->dev, "ASoC: can't create compress %s\n",
 					 dai_link->stream_name);
@@ -1730,7 +1747,7 @@  static int soc_probe_link_dais(struct snd_soc_card *card,
 
 		if (!dai_link->params) {
 			/* create the pcm */
-			ret = soc_new_pcm(rtd, rtd->num);
+			ret = soc_new_pcm(rtd, num);
 			if (ret < 0) {
 				dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
 				       dai_link->stream_name, ret);
@@ -2076,6 +2093,59 @@  int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
 #endif /* CONFIG_DMI */
 
+static void soc_check_tplg_fes(struct snd_soc_card *card)
+{
+	struct snd_soc_platform *platform;
+	struct snd_soc_dai_link *dai_link;
+	int i;
+
+	list_for_each_entry(platform, &platform_list, list) {
+
+		/* does this platform override FEs ? */
+		if (!platform->driver->ignore_machine)
+			continue;
+
+		/* for this machine ? */
+		if (strcmp(platform->driver->ignore_machine,
+			   card->dev->driver->name))
+			continue;
+
+		/* machine matches, so override the rtd data */
+		for (i = 0; i < card->num_links; i++) {
+
+			dai_link = &card->dai_link[i];
+
+			/* ignore this FE */
+			if (dai_link->dynamic) {
+				dai_link->ignore = true;
+				continue;
+			}
+
+			dev_info(card->dev, "info: override FE DAI link %s\n",
+				 card->dai_link[i].name);
+
+			/* override platform */
+			dai_link->platform_name = platform->component.name;
+			dai_link->cpu_dai_name = platform->component.name;
+
+			/* convert non BE into BE */
+			dai_link->no_pcm = 1;
+			dai_link->dpcm_playback = 1;
+			dai_link->dpcm_capture = 1;
+
+			/* override any BE fixups */
+			dai_link->be_hw_params_fixup =
+				platform->driver->be_hw_params_fixup;
+
+			/* most BE links dont set stream name, so set it to
+			 * dai link name if it's NULL to help bind widgets.
+			 */
+			if (!dai_link->stream_name)
+				dai_link->stream_name = dai_link->name;
+		}
+	}
+}
+
 static int snd_soc_instantiate_card(struct snd_soc_card *card)
 {
 	struct snd_soc_codec *codec;
@@ -2086,6 +2156,9 @@  static int snd_soc_instantiate_card(struct snd_soc_card *card)
 	mutex_lock(&client_mutex);
 	mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
 
+	/* check whether any platform is ignore machine FE and using topology */
+	soc_check_tplg_fes(card);
+
 	/* bind DAIs */
 	for (i = 0; i < card->num_links; i++) {
 		ret = soc_bind_dai_link(card, &card->dai_link[i]);
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 68d9dc930096..4ce489165a6d 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -909,8 +909,20 @@  int soc_dai_hw_params(struct snd_pcm_substream *substream,
 		      struct snd_pcm_hw_params *params,
 		      struct snd_soc_dai *dai)
 {
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	int ret;
 
+	/* perform any topology hw_params fixups before DAI  */
+	if (rtd->dai_link->be_hw_params_fixup) {
+		ret = rtd->dai_link->be_hw_params_fixup(rtd, params);
+		if (ret < 0) {
+			dev_err(rtd->dev,
+				"ASoC: hw_params topology fixup failed %d\n",
+				ret);
+			return ret;
+		}
+	}
+
 	if (dai->driver->ops->hw_params) {
 		ret = dai->driver->ops->hw_params(substream, params, dai);
 		if (ret < 0) {