ASoC: Constify passed data to core function

Several ASoC functions receive pointers to data which is not modified,
e.g. pointers to 'snd_soc_dai', 'snd_soc_pcm_runtime',
'snd_pcm_hw_params' and 'snd_soc_dai_link'.

All these pointers can be made as a pointer to const.  This makes code
safer, serves as clear annotation of function's intentions (no ownership
passed to the function, no modifications) and allows putting pointed
structures in rodata (if ever applicable).

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://msgid.link/r/20240617-n-asoc-const-auto-selectable-formats-v1-3-8004f346ee38@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

3 files changed, 10 insertions, 10 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 3ab6626ad680..724fe1f033b5 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -297,7 +297,7 @@ static int snd_soc_is_matching_dai(const struct snd_soc_dai_link_component *dlc,
 	return 0;
 }
 
-const char *snd_soc_dai_name_get(struct snd_soc_dai *dai)
+const char *snd_soc_dai_name_get(const struct snd_soc_dai *dai)
 {
 	/* see snd_soc_is_matching_dai() */
 	if (dai->driver->name)
@@ -3430,7 +3430,7 @@ unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node *np,
 }
 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_clock_provider_raw);
 
-int snd_soc_get_stream_cpu(struct snd_soc_dai_link *dai_link, int stream)
+int snd_soc_get_stream_cpu(const struct snd_soc_dai_link *dai_link, int stream)
 {
 	/*
 	 * [Normal]
diff --git a/sound/soc/soc-dai.c b/sound/soc/soc-dai.c
index 03afd5efb24c..55d1a5a099df 100644
--- a/sound/soc/soc-dai.c
+++ b/sound/soc/soc-dai.c
@@ -134,7 +134,7 @@ int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
 }
 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
 
-int snd_soc_dai_get_fmt_max_priority(struct snd_soc_pcm_runtime *rtd)
+int snd_soc_dai_get_fmt_max_priority(const struct snd_soc_pcm_runtime *rtd)
 {
 	struct snd_soc_dai *dai;
 	int i, max = 0;
@@ -166,7 +166,7 @@ int snd_soc_dai_get_fmt_max_priority(struct snd_soc_pcm_runtime *rtd)
  * modes.  This will mean that sometimes fewer formats
  * are reported here than are supported by set_fmt().
  */
-u64 snd_soc_dai_get_fmt(struct snd_soc_dai *dai, int priority)
+u64 snd_soc_dai_get_fmt(const struct snd_soc_dai *dai, int priority)
 {
 	const struct snd_soc_dai_ops *ops = dai->driver->ops;
 	u64 fmt = 0;
@@ -471,7 +471,7 @@ int snd_soc_dai_compress_new(struct snd_soc_dai *dai,
  *
  * Returns true if the DAI supports the indicated stream type.
  */
-bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int dir)
+bool snd_soc_dai_stream_valid(const struct snd_soc_dai *dai, int dir)
 {
 	struct snd_soc_pcm_stream *stream = snd_soc_dai_get_pcm_stream(dai, dir);
 
@@ -528,7 +528,7 @@ void snd_soc_dai_action(struct snd_soc_dai *dai,
 }
 EXPORT_SYMBOL_GPL(snd_soc_dai_action);
 
-int snd_soc_dai_active(struct snd_soc_dai *dai)
+int snd_soc_dai_active(const struct snd_soc_dai *dai)
 {
 	int stream, active;
 
diff --git a/sound/soc/soc-utils.c b/sound/soc/soc-utils.c
index d05e712c9518..5dea5609baf4 100644
--- a/sound/soc/soc-utils.c
+++ b/sound/soc/soc-utils.c
@@ -21,7 +21,7 @@ int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots)
 }
 EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size);
 
-int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params)
+int snd_soc_params_to_frame_size(const struct snd_pcm_hw_params *params)
 {
 	int sample_size;
 
@@ -40,7 +40,7 @@ int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots)
 }
 EXPORT_SYMBOL_GPL(snd_soc_calc_bclk);
 
-int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params)
+int snd_soc_params_to_bclk(const struct snd_pcm_hw_params *params)
 {
 	int ret;
 
@@ -79,7 +79,7 @@ EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk);
  * Return: bclk frequency in Hz, else a negative error code if params format
  *	   is invalid.
  */
-int snd_soc_tdm_params_to_bclk(struct snd_pcm_hw_params *params,
+int snd_soc_tdm_params_to_bclk(const struct snd_pcm_hw_params *params,
 			       int tdm_width, int tdm_slots, int slot_multiple)
 {
 	if (!tdm_slots)
@@ -211,7 +211,7 @@ static struct snd_soc_dai_driver dummy_dai = {
 	.ops = &dummy_dai_ops,
 };
 
-int snd_soc_dai_is_dummy(struct snd_soc_dai *dai)
+int snd_soc_dai_is_dummy(const struct snd_soc_dai *dai)
 {
 	if (dai->driver == &dummy_dai)
 		return 1;