[SDX62] WCN6856设置国家码为GB,发现无法设置100及以上的信道 ，设置之后无法扫描到SSID问题分析及解决
问题描述
设置国家码为GB,然后将AP设置为100信道80MHz频宽，发现终端无法扫描到SSID热点
hostapd启动日志
WPS: Converting display to virtual_display for WPS 2.0 compliance
WPS: Converting push_button to virtual_push_button for WPS 2.0 compliance
Failed to check if DFS is required; ret=-1
Device is trying to offload WPS Probe Response while not supporting this
Failed to check if DFS is required; ret=-1
wlan0: interface state COUNTRY_UPDATE->ENABLED
wlan0: AP-ENABLED
Failed to check if DFS is required; ret=-1
wlan0: IEEE 802.11 driver had channel switch: freq=5500, ht=1, vht_ch=0x0, he_ch=0x0, offset=1, width=3 (80 MHz), cf1=5530, cf2=0
wlan0: CTRL-EVENT-CHANNEL-SWITCH freq=5500 ht_enabled=1 ch_offset=1 ch_width=80 MHz cf1=5530 cf2=0 dfs=1
wlan0: AP-CSA-FINISHED freq=5500 dfs=1
wpa_driver_nld80211 vendor event recieved
wpa_driver_nld80211 vendor event recieved
wlan0: interface state ENABLED->DFS
wlan0: DFS-CAC-START freq=5500 chan=100 chan_offset=0 width=0 seg0=0 seg1=0 cac_time=60s
wpa_driver_nld80211 vendor event recieved
Failed to connect to hostapd - wpa_ctrl_open: No such file or directory
ash: bad number
wlan0: DFS-CAC-COMPLETED success=1 freq=5500 ht_enabled=0 chan_offset=0 chan_width=0 cf1=0 cf2=0
wlan0: interface state DFS->ENABLED
wlan0: AP-ENABLED
wpa_driver_nld80211 vendor event recieved
日志分析
从以下日志可以看到，之所以无法扫到SSID，是由于信道100~165都属于DFS信道，
wlan0: IEEE 802.11 driver had channel switch: freq=5500, ht=1, vht_ch=0x0, he_ch=0x0, offset=1, width=3 (80 MHz), cf1=5530, cf2=0
wlan0: CTRL-EVENT-CHANNEL-SWITCH freq=5500 ht_enabled=1 ch_offset=1 ch_width=80 MHz cf1=5530 cf2=0 dfs=1
wlan0: AP-CSA-FINISHED freq=5500 dfs=1
wpa_driver_nld80211 vendor event recieved
wpa_driver_nld80211 vendor event recieved
wlan0: interface state ENABLED->DFS
wlan0: DFS-CAC-START freq=5500 chan=100 chan_offset=0 width=0 seg0=0 seg1=0 cac_time=60s解决方案
查看 WCNSS_qcom_cfg.ini文件，gindoor_channel_support配置项是可以指定为indoor channel支持，查看indoor channel说明如下
室外信道：100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 149, 153, 157, 161, 165
室内信道：36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 149, 153, 157, 161, 165
/*
*
* gindoor_channel_support - support to start sap in indoor channel
* @Min: 0
* @Max: 1
* @Default: 0
*
* This ini is to support to start sap in indoor channel.
* Customer can config this item to enable/disable sap in indoor channel
*
* Related: None
*
* Supported Feature: SAP
*
* Usage: External
*
*
*/
#define CFG_INDOOR_CHANNEL_SUPPORT CFG_INI_BOOL( \
"gindoor_channel_support", \
0, \
"enable/disable sap in indoor channel")
在 WCNSS_qcom_cfg.ini文件中增加
gindoor_channel_support=1即可