dai: make dai_info and dai_type const

Makes dai_info and dai_type structures constant.
Pointer to dai array should not change during the lifetime of DSP.

Signed-off-by: Tomasz Lauda <tomasz.lauda@linux.intel.com>

src/include/sof/lib/dai.h

@@ -125,7 +125,7 @@ struct dai_type_info {
  * \brief Holds information about array of DAIs grouped by type.
  */
 struct dai_info {
-	struct dai_type_info *dai_type_array;
+	const struct dai_type_info *dai_type_array;
 	size_t num_dai_types;
 };
 
@@ -271,7 +271,7 @@ static inline void dai_update_bits(struct dai *dai, uint32_t reg,
 	io_reg_update_bits(dai_base(dai) + reg, mask, value);
 }
 
-static inline struct dai_info *dai_info_get(void)
+static inline const struct dai_info *dai_info_get(void)
 {
 	return sof_get()->dai_info;
 }

src/include/sof/sof.h

@@ -74,7 +74,7 @@ struct sof {
 	struct notify_data *notify_data;
 
 	/* platform dai information */
-	struct dai_info *dai_info;
+	const struct dai_info *dai_info;
 
 	/* platform DMA information */
 	struct dma_info *dma_info;

src/lib/dai.c

@@ -14,10 +14,10 @@
 
 #define trace_dai(__e, ...) trace_event(TRACE_CLASS_DAI, __e, ##__VA_ARGS__)
 
-static inline struct dai_type_info *dai_find_type(uint32_t type)
+static inline const struct dai_type_info *dai_find_type(uint32_t type)
 {
-	struct dai_info *info = dai_info_get();
-	struct dai_type_info *dti;
+	const struct dai_info *info = dai_info_get();
+	const struct dai_type_info *dti;
 
 	for (dti = info->dai_type_array;
 	     dti < info->dai_type_array + info->num_dai_types; dti++) {
@@ -30,7 +30,7 @@ static inline struct dai_type_info *dai_find_type(uint32_t type)
 struct dai *dai_get(uint32_t type, uint32_t index, uint32_t flags)
 {
 	int ret = 0;
-	struct dai_type_info *dti;
+	const struct dai_type_info *dti;
 	struct dai *d;
 
 	dti = dai_find_type(type);

src/platform/baytrail/lib/dai.c

@@ -116,7 +116,7 @@ static struct dai ssp[] = {
 #endif
 };
 
-static struct dai_type_info dti[] = {
+const struct dai_type_info dti[] = {
 	{
 		.type = SOF_DAI_INTEL_SSP,
 		.dai_array = ssp,
@@ -124,7 +124,7 @@ static struct dai_type_info dti[] = {
 	}
 };
 
-static struct dai_info lib_dai = {
+const struct dai_info lib_dai = {
 	.dai_type_array = dti,
 	.num_dai_types = ARRAY_SIZE(dti)
 };

src/platform/haswell/lib/dai.c

@@ -48,7 +48,7 @@ static struct dai ssp[2] = {
 },
 };
 
-static struct dai_type_info dti[] = {
+const struct dai_type_info dti[] = {
 	{
 		.type = SOF_DAI_INTEL_SSP,
 		.dai_array = ssp,
@@ -56,7 +56,7 @@ static struct dai_type_info dti[] = {
 	}
 };
 
-static struct dai_info lib_dai = {
+const struct dai_info lib_dai = {
 	.dai_type_array = dti,
 	.num_dai_types = ARRAY_SIZE(dti)
 };

src/platform/imx8/lib/dai.c

@@ -63,7 +63,8 @@ static struct dai sai[] = {
 	.drv = &sai_driver,
 },
 };
-static struct dai_type_info dti[] = {
+
+const struct dai_type_info dti[] = {
 	{
 		.type = SOF_DAI_IMX_SAI,
 		.dai_array = sai,
@@ -76,7 +77,7 @@ static struct dai_type_info dti[] = {
 	},
 };
 
-static struct dai_info lib_dai = {
+const struct dai_info lib_dai = {
 	.dai_type_array = dti,
 	.num_dai_types = ARRAY_SIZE(dti)
 };

src/platform/intel/cavs/lib/dai.c

@@ -87,7 +87,7 @@ static struct dai alh[DAI_NUM_ALH_BI_DIR_LINKS];
 
 static struct dai hda[(DAI_NUM_HDA_OUT + DAI_NUM_HDA_IN)];
 
-static struct dai_type_info dti[] = {
+const struct dai_type_info dti[] = {
 #if CONFIG_CAVS_SSP
 	{
 		.type = SOF_DAI_INTEL_SSP,
@@ -116,7 +116,7 @@ static struct dai_type_info dti[] = {
 #endif
 };
 
-static struct dai_info lib_dai = {
+const struct dai_info lib_dai = {
 	.dai_type_array = dti,
 	.num_dai_types = ARRAY_SIZE(dti)
 };