ASoC: compress: add config item for soc-compress to make it compiled only when needed

We don't always need soc-compress in soc, here add a config item
SND_SOC_COMPRESS, when nobody select it, the soc-compress will
not be compiled.

Here also change Kconfig to 'select SND_SOC_COMPRESS' for drivers
that needed soc-compress.
Signed-off-by: NJie Yang <yang.jie@intel.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

include/sound/soc-dai.h

@@ -214,7 +214,7 @@ struct snd_soc_dai_driver {
 	int (*suspend)(struct snd_soc_dai *dai);
 	int (*resume)(struct snd_soc_dai *dai);
 	/* compress dai */
-	bool compress_dai;
+	int (*compress_new)(struct snd_soc_pcm_runtime *rtd, int num);
 	/* DAI is also used for the control bus */
 	bool bus_control;
 

include/sound/soc.h

@@ -440,7 +440,9 @@ int snd_soc_platform_read(struct snd_soc_platform *platform,
 int snd_soc_platform_write(struct snd_soc_platform *platform,
 					unsigned int reg, unsigned int val);
 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
-int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num);
+#ifdef CONFIG_SND_SOC_COMPRESS
+int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num);
+#endif
 
 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
 		const char *dai_link, int stream);

sound/soc/Kconfig

@@ -9,7 +9,6 @@ menuconfig SND_SOC
 	select SND_JACK if INPUT=y || INPUT=SND
 	select REGMAP_I2C if I2C
 	select REGMAP_SPI if SPI_MASTER
-	select SND_COMPRESS_OFFLOAD
 	---help---
 
 	  If you want ASoC support, you should say Y here and also to the
@@ -30,6 +29,10 @@ config SND_SOC_GENERIC_DMAENGINE_PCM
 	bool
 	select SND_DMAENGINE_PCM
 
+config SND_SOC_COMPRESS
+	bool
+	select SND_COMPRESS_OFFLOAD
+
 config SND_SOC_TOPOLOGY
 	bool
 

sound/soc/Makefile

 snd-soc-core-objs := soc-core.o soc-dapm.o soc-jack.o soc-cache.o soc-utils.o
-snd-soc-core-objs += soc-pcm.o soc-compress.o soc-io.o soc-devres.o soc-ops.o
+snd-soc-core-objs += soc-pcm.o soc-io.o soc-devres.o soc-ops.o
+snd-soc-core-$(CONFIG_SND_SOC_COMPRESS) += soc-compress.o
 
 ifneq ($(CONFIG_SND_SOC_TOPOLOGY),)
 snd-soc-core-objs += soc-topology.o

sound/soc/intel/Kconfig

@@ -12,6 +12,7 @@ config SND_MFLD_MACHINE
 
 config SND_SST_MFLD_PLATFORM
 	tristate
+	select SND_SOC_COMPRESS
 
 config SND_SST_IPC
 	tristate

sound/soc/intel/atom/sst-mfld-platform-pcm.c

@@ -529,7 +529,7 @@ static struct snd_soc_dai_driver sst_platform_dai[] = {
 },
 {
 	.name = "compress-cpu-dai",
-	.compress_dai = 1,
+	.compress_new = snd_soc_new_compress,
 	.ops = &sst_compr_dai_ops,
 	.playback = {
 		.stream_name = "Compress Playback",

sound/soc/soc-compress.c

@@ -612,8 +612,15 @@ static struct snd_compr_ops soc_compr_dyn_ops = {
 	.get_codec_caps = soc_compr_get_codec_caps
 };
 
-/* create a new compress */
-int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
+/**
+ * snd_soc_new_compress - create a new compress.
+ *
+ * @rtd: The runtime for which we will create compress
+ * @num: the device index number (zero based - shared with normal PCMs)
+ *
+ * Return: 0 for success, else error.
+ */
+int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
 {
 	struct snd_soc_codec *codec = rtd->codec;
 	struct snd_soc_platform *platform = rtd->platform;
@@ -703,3 +710,4 @@ int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
 	kfree(compr);
 	return ret;
 }
+EXPORT_SYMBOL_GPL(snd_soc_new_compress);

sound/soc/soc-core.c

@@ -1370,9 +1370,9 @@ static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
 		soc_dpcm_debugfs_add(rtd);
 #endif
 
-	if (cpu_dai->driver->compress_dai) {
+	if (cpu_dai->driver->compress_new) {
 		/*create compress_device"*/
-		ret = soc_new_compress(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);