ASoC: Intel: sof_sdw: Move get_codec_dai_by_name() into sof_sdw itself

Currently sof_sdw relies on sof_board_helpers to provide
get_codec_dai_by_name(), but that is the only function from
sof_board_helpers it uses and no other machine driver requires
that function. There is no reason for sof_sdw to select SSP_COMMON
but more and more functions in sof_board_helpers are gaining
dependencies on functions that would require stubs for sof_sdw to
build without it.  Firstly it was sof_ssp_get_codec_name(), as was
fixed in commit c1469c3a ("ASoC: Intel: ssp-common: Add stub for
sof_ssp_get_codec_name"), now it is:

ERROR: modpost: "sof_ssp_detect_amp_type"
[sound/soc/intel/boards/snd-soc-intel-sof-board-helpers.ko] undefined!
ERROR: modpost: "sof_ssp_detect_codec_type"
[sound/soc/intel/boards/snd-soc-intel-sof-board-helpers.ko] undefined!

Rather than adding more stubs, simply move the affected function
to the sof_sdw machine driver itself and no longer select
SND_SOC_INTEL_SOF_BOARD_HELPERS at all. This should allow work on
SSP_COMMON to progress without affecting sof_sdw.
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://msgid.link/r/20240326160429.13560-7-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/Kconfig

@@ -678,7 +678,6 @@ config SND_SOC_INTEL_SOUNDWIRE_SOF_MACH
 	depends on MFD_INTEL_LPSS || COMPILE_TEST
 	depends on SND_SOC_INTEL_USER_FRIENDLY_LONG_NAMES || COMPILE_TEST
 	depends on SOUNDWIRE
-	select SND_SOC_INTEL_SOF_BOARD_HELPERS
 	select SND_SOC_MAX98363
 	select SND_SOC_MAX98373_I2C
 	select SND_SOC_MAX98373_SDW

sound/soc/intel/boards/sof_board_helpers.c

@@ -630,24 +630,6 @@ sof_intel_board_get_ctx(struct device *dev, unsigned long board_quirk)
 }
 EXPORT_SYMBOL_NS(sof_intel_board_get_ctx, SND_SOC_INTEL_SOF_BOARD_HELPERS);
 
-struct snd_soc_dai *get_codec_dai_by_name(struct snd_soc_pcm_runtime *rtd,
-					  const char * const dai_name[], int num_dais)
-{
-	struct snd_soc_dai *dai;
-	int index;
-	int i;
-
-	for (index = 0; index < num_dais; index++)
-		for_each_rtd_codec_dais(rtd, i, dai)
-			if (strstr(dai->name, dai_name[index])) {
-				dev_dbg(rtd->card->dev, "get dai %s\n", dai->name);
-				return dai;
-			}
-
-	return NULL;
-}
-EXPORT_SYMBOL_NS(get_codec_dai_by_name, SND_SOC_INTEL_SOF_BOARD_HELPERS);
-
 MODULE_DESCRIPTION("ASoC Intel SOF Machine Driver Board Helpers");
 MODULE_AUTHOR("Brent Lu <brent.lu@intel.com>");
 MODULE_LICENSE("GPL");

sound/soc/intel/boards/sof_board_helpers.h

@@ -167,7 +167,4 @@ int sof_intel_board_set_dai_link(struct device *dev, struct snd_soc_card *card,
 struct sof_card_private *
 sof_intel_board_get_ctx(struct device *dev, unsigned long board_quirk);
 
-struct snd_soc_dai *get_codec_dai_by_name(struct snd_soc_pcm_runtime *rtd,
-					  const char * const dai_name[], int num_dais);
-
 #endif /* __SOF_INTEL_BOARD_HELPERS_H */

sound/soc/intel/boards/sof_sdw.c

@@ -514,6 +514,24 @@ static struct snd_soc_dai_link_component platform_component[] = {
 	}
 };
 
+struct snd_soc_dai *get_codec_dai_by_name(struct snd_soc_pcm_runtime *rtd,
+					  const char * const dai_name[],
+					  int num_dais)
+{
+	struct snd_soc_dai *dai;
+	int index;
+	int i;
+
+	for (index = 0; index < num_dais; index++)
+		for_each_rtd_codec_dais(rtd, i, dai)
+			if (strstr(dai->name, dai_name[index])) {
+				dev_dbg(rtd->card->dev, "get dai %s\n", dai->name);
+				return dai;
+			}
+
+	return NULL;
+}
+
 /* these wrappers are only needed to avoid typecast compilation errors */
 int sdw_startup(struct snd_pcm_substream *substream)
 {

sound/soc/intel/boards/sof_sdw_common.h

@@ -107,6 +107,10 @@ struct mc_private {
 
 extern unsigned long sof_sdw_quirk;
 
+struct snd_soc_dai *get_codec_dai_by_name(struct snd_soc_pcm_runtime *rtd,
+					  const char * const dai_name[],
+					  int num_dais);
+
 int sdw_startup(struct snd_pcm_substream *substream);
 int sdw_prepare(struct snd_pcm_substream *substream);
 int sdw_trigger(struct snd_pcm_substream *substream, int cmd);

sound/soc/intel/boards/sof_sdw_cs42l42.c

@@ -15,7 +15,6 @@
 #include <sound/soc-acpi.h>
 #include <sound/soc-dapm.h>
 #include <sound/jack.h>
-#include "sof_board_helpers.h"
 #include "sof_sdw_common.h"
 
 static const struct snd_soc_dapm_widget cs42l42_widgets[] = {

sound/soc/intel/boards/sof_sdw_rt5682.c

@@ -15,7 +15,6 @@
 #include <sound/soc-acpi.h>
 #include <sound/soc-dapm.h>
 #include <sound/jack.h>
-#include "sof_board_helpers.h"
 #include "sof_sdw_common.h"
 
 static const struct snd_soc_dapm_widget rt5682_widgets[] = {

sound/soc/intel/boards/sof_sdw_rt700.c

@@ -13,7 +13,6 @@
 #include <sound/soc-acpi.h>
 #include <sound/soc-dapm.h>
 #include <sound/jack.h>
-#include "sof_board_helpers.h"
 #include "sof_sdw_common.h"
 
 static const struct snd_soc_dapm_widget rt700_widgets[] = {

sound/soc/intel/boards/sof_sdw_rt711.c

@@ -15,7 +15,6 @@
 #include <sound/soc-acpi.h>
 #include <sound/soc-dapm.h>
 #include <sound/jack.h>
-#include "sof_board_helpers.h"
 #include "sof_sdw_common.h"
 
 /*

sound/soc/intel/boards/sof_sdw_rt712_sdca.c

@@ -13,7 +13,6 @@
 #include <sound/soc.h>
 #include <sound/soc-acpi.h>
 #include <sound/soc-dapm.h>
-#include "sof_board_helpers.h"
 #include "sof_sdw_common.h"
 
 static const struct snd_soc_dapm_widget rt712_spk_widgets[] = {

sound/soc/intel/boards/sof_sdw_rt_sdca_jack_common.c

@@ -15,7 +15,6 @@
 #include <sound/soc-acpi.h>
 #include <sound/soc-dapm.h>
 #include <sound/jack.h>
-#include "sof_board_helpers.h"
 #include "sof_sdw_common.h"
 
 /*

sound/soc/intel/boards/sof_ssp_common.h

@@ -68,13 +68,6 @@ enum sof_ssp_codec {
 enum sof_ssp_codec sof_ssp_detect_codec_type(struct device *dev);
 enum sof_ssp_codec sof_ssp_detect_amp_type(struct device *dev);
 
-#if IS_ENABLED(CONFIG_SND_SOC_INTEL_SOF_SSP_COMMON)
 const char *sof_ssp_get_codec_name(enum sof_ssp_codec codec_type);
-#else
-static inline const char *sof_ssp_get_codec_name(enum sof_ssp_codec codec_type)
-{
-	return NULL;
-}
-#endif
 
 #endif /* __SOF_SSP_COMMON_H */