qcacmn: Fix regulatory non-offload issues

Current regulatory non-offloads has following issues:
	1) In "iw reg get" output "00" can not be shown when trying to
	   set country code to "00".
	2) In BDF file, if only reg domain is specified then
	   "iw reg get" output should contain alpha2 code of country which
	   first matches with BDF reg domain.

To fix these issues in reg_get_reginfo_form_regdmn_pair(),
populate reg_info->alpha2 with:
	(a) "00" for WORLD domain and
	(b) alpha2 code of first country matching with non WORLD domain.

Change-Id: I5cf87587a1a0f648700cffdc7ff60f05f043f723
CRs-Fixed: 2494516

umac/regulatory/core/src/reg_db.h

@@ -25,6 +25,9 @@
 #ifndef __REG_DB_H
 #define __REG_DB_H
 
+/* Alpha2 code for world reg domain */
+#define REG_WORLD_ALPHA2 "00"
+
 /**
  * struct regulatory_rule
  * @start_freq: start frequency

umac/regulatory/core/src/reg_db_parser.c

@@ -260,6 +260,50 @@ static inline QDF_STATUS reg_get_reginfo_form_country_code_and_regdmn_pair(
 	return QDF_STATUS_SUCCESS;
 }
 
+#ifdef CONFIG_REG_CLIENT
+/**
+ * reg_update_alpha2_from_domain() - Get country alpha2 code from reg domain
+ * @reg_info: pointer to hold alpha2 code
+ *
+ * This function is used to populate alpha2 of @reg_info with:
+ *	(a) "00" (REG_WORLD_ALPHA2) for WORLD domain and
+ *	(b) alpha2 of first country matching with non WORLD domain.
+ *
+ * Return: None
+ */
+static void
+reg_update_alpha2_from_domain(struct cur_regulatory_info *reg_info)
+{
+	uint16_t i;
+	int num_countries;
+
+	if (reg_is_world_ctry_code(reg_info->reg_dmn_pair)) {
+		qdf_mem_copy(reg_info->alpha2, REG_WORLD_ALPHA2,
+			     sizeof(reg_info->alpha2));
+		return;
+	}
+
+	reg_get_num_countries(&num_countries);
+
+	for (i = 0; i < (uint16_t)num_countries; i++)
+		if (g_all_countries[i].reg_dmn_pair_id ==
+		    reg_info->reg_dmn_pair)
+			break;
+
+	if (i == (uint16_t)num_countries)
+		return;
+
+	qdf_mem_copy(reg_info->alpha2, g_all_countries[i].alpha2,
+		     sizeof(g_all_countries[i].alpha2));
+	reg_info->ctry_code = g_all_countries[i].country_code;
+}
+#else
+static inline void
+reg_update_alpha2_from_domain(struct cur_regulatory_info *reg_info)
+{
+}
+#endif
+
 static inline QDF_STATUS reg_get_reginfo_form_regdmn_pair(
 		struct cur_regulatory_info *reg_info,
 		uint16_t regdmn_pair)
@@ -284,6 +328,9 @@ static inline QDF_STATUS reg_get_reginfo_form_regdmn_pair(
 		reg_info->reg_dmn_pair =
 			g_reg_dmn_pairs[regdmn_pair].reg_dmn_pair_id;
 		reg_info->ctry_code = 0;
+
+		reg_update_alpha2_from_domain(reg_info);
+
 		reg_info->dfs_region = regdomains_5g[dmn_id_5g].dfs_region;
 		reg_info->phybitmap = 0;
 

umac/regulatory/core/src/reg_utils.c

@@ -66,11 +66,7 @@ bool reg_chan_has_dfs_attribute(struct wlan_objmgr_pdev *pdev, uint32_t ch)
 	return false;
 }
 
-/**
- * reg_is_world_ctry_code() - Check if the given country code is WORLD regdomain
- * @ctry_code: Country code value.
- */
-static bool reg_is_world_ctry_code(uint16_t ctry_code)
+bool reg_is_world_ctry_code(uint16_t ctry_code)
 {
 	if ((ctry_code & 0xFFF0) == DEFAULT_WORLD_REGDMN)
 		return true;

umac/regulatory/core/src/reg_utils.h

@@ -42,6 +42,14 @@
 	 - REG_CH_TO_FREQ(reg_get_chan_enum(curchan))	\
 	 > REG_SBS_SEPARATION_THRESHOLD)
 
+/**
+ * reg_is_world_ctry_code() - Check if the given country code is WORLD regdomain
+ * @ctry_code: Country code value.
+ *
+ * Return: If country code is WORLD regdomain return true else false
+ */
+bool reg_is_world_ctry_code(uint16_t ctry_code);
+
 #ifdef CONFIG_REG_CLIENT
 /**
  * reg_chan_has_dfs_attribute() - check channel has dfs attribue or not