ASoC: topology: Revert recent changes while boot errors are investigated

Krzysztof Kozlowski reported a NULL dereference in _instantiate_card()
on Odroid XU3 and XU boards which he bisected to 45f8cb57 (ASoC:
core: Allow topology to override machine driver FE DAI link config).
Revert that commit for now, along with f11a5c27 (ASoC: core: Add
name prefix for machines with topology rewrites) due to dependency
issues, in order to keep things booting cleanly in -next.
Reported-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc.h

@@ -1012,14 +1012,6 @@ 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;
-	const char *topology_name_prefix;
-	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 {
@@ -1126,9 +1118,6 @@ 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 */
 };
@@ -1168,7 +1157,6 @@ struct snd_soc_card {
 	const char *long_name;
 	const char *driver_name;
 	char dmi_longname[80];
-	char topology_shortname[32];
 
 	struct device *dev;
 	struct snd_card *snd_card;

sound/soc/soc-core.c

@@ -1050,9 +1050,6 @@ 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)) {
@@ -1675,7 +1672,7 @@ 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, num;
+	int i, ret;
 
 	dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
 			card->name, rtd->num, order);
@@ -1721,23 +1718,9 @@ 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, num);
+		ret = cpu_dai->driver->compress_new(rtd, rtd->num);
 		if (ret < 0) {
 			dev_err(card->dev, "ASoC: can't create compress %s\n",
 					 dai_link->stream_name);
@@ -1747,7 +1730,7 @@ static int soc_probe_link_dais(struct snd_soc_card *card,
 
 		if (!dai_link->params) {
 			/* create the pcm */
-			ret = soc_new_pcm(rtd, num);
+			ret = soc_new_pcm(rtd, rtd->num);
 			if (ret < 0) {
 				dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
 				       dai_link->stream_name, ret);
@@ -2093,67 +2076,6 @@ 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;
-		}
-
-		/* Inform userspace we are using alternate topology */
-		if (platform->driver->topology_name_prefix) {
-			snprintf(card->topology_shortname, 32, "%s-%s",
-				 platform->driver->topology_name_prefix,
-				 card->name);
-			card->name = card->topology_shortname;
-		}
-	}
-}
-
 static int snd_soc_instantiate_card(struct snd_soc_card *card)
 {
 	struct snd_soc_codec *codec;
@@ -2164,9 +2086,6 @@ 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]);

sound/soc/soc-pcm.c

@@ -909,20 +909,8 @@ 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) {