Xiaomi r3p mt7615N low tx power 2ghz 5ghz

Yeasterday i've compiled firmware for target Xiaomi mi r3p from openwrt master branch.

Linux version 5.4.117 (ru@localhost) (gcc version 8.4.0 (OpenWrt GCC 8.4.0 r16708-3c3c2c4f37)) #0 SMP Mon May 10 17:52:14 2021

root@OpenWrt:/etc# iw list | grep -i mhz
                        Supported Channel Width: 160 MHz, 80+80 MHz
                        short GI (80 MHz)
                        short GI (160/80+80 MHz)
                        * 5180 MHz [36] (6.0 dBm)
                        * 5200 MHz [40] (6.0 dBm)
                        * 5220 MHz [44] (6.0 dBm)
                        * 5240 MHz [48] (6.0 dBm)
                        * 5260 MHz [52] (6.0 dBm)
                        * 5280 MHz [56] (6.0 dBm)
                        * 5300 MHz [60] (6.0 dBm)
                        * 5320 MHz [64] (6.0 dBm)
                        * 5500 MHz [100] (6.0 dBm)
                        * 5520 MHz [104] (6.0 dBm)
                        * 5540 MHz [108] (6.0 dBm)
                        * 5560 MHz [112] (6.0 dBm)
                        * 5580 MHz [116] (6.0 dBm)
                        * 5600 MHz [120] (6.0 dBm)
                        * 5620 MHz [124] (6.0 dBm)
                        * 5640 MHz [128] (6.0 dBm)
                        * 5660 MHz [132] (6.0 dBm)
                        * 5680 MHz [136] (6.0 dBm)
                        * 5700 MHz [140] (6.0 dBm)
                        * 5720 MHz [144] (6.0 dBm)
                        * 5745 MHz [149] (6.0 dBm)
                        * 5765 MHz [153] (6.0 dBm)
                        * 5785 MHz [157] (6.0 dBm)
                        * 5805 MHz [161] (6.0 dBm)
                        * 5825 MHz [165] (6.0 dBm)
                        * 5845 MHz [169] (disabled)
                        * 5865 MHz [173] (disabled)
                   total <= 16, #channels <= 1, STA/AP BI must match, radar detect widths: { 20 MHz (no HT), 20 MHz, 40 MHz, 80 MHz, 80+80 MHz, 160 MHz }
                 * short GI for 40 MHz
                        * 2412 MHz [1] (6.0 dBm)
                        * 2417 MHz [2] (6.0 dBm)
                        * 2422 MHz [3] (6.0 dBm)
                        * 2427 MHz [4] (6.0 dBm)
                        * 2432 MHz [5] (6.0 dBm)
                        * 2437 MHz [6] (6.0 dBm)
                        * 2442 MHz [7] (6.0 dBm)
                        * 2447 MHz [8] (6.0 dBm)
                        * 2452 MHz [9] (6.0 dBm)
                        * 2457 MHz [10] (6.0 dBm)
                        * 2462 MHz [11] (6.0 dBm)
                        * 2467 MHz [12] (6.0 dBm)
                        * 2472 MHz [13] (6.0 dBm)
                        * 2484 MHz [14] (disabled)
                   total <= 16, #channels <= 1, STA/AP BI must match, radar detect widths: { 20 MHz (no HT), 20 MHz, 40 MHz, 80 MHz, 80+80 MHz, 160 MHz }
                 * short GI for 40 MHz

Wireless configuration

root@OpenWrt:/etc# cat /etc/config/wireless

config wifi-device 'radio0'
        option type 'mac80211'
        option hwmode '11g'
        option path '1e140000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0'
        option cell_density '0'
        option htmode 'HT40'
        option channel 'auto'
        option country 'PA'

config wifi-iface 'default_radio0'
        option device 'radio0'
        option network 'lan'
        option mode 'ap'
        option ssid 'tobe20'
        option encryption 'sae-mixed'
        option key '88888888'
        option ieee80211w '1'

config wifi-device 'radio1'
        option type 'mac80211'
        option hwmode '11a'
        option path '1e140000.pcie/pci0000:00/0000:00:01.0/0000:02:00.0'
        option channel 'auto'
        option cell_density '0'
        option htmode 'VHT40'
        option country 'PA'

config wifi-iface 'default_radio1'
        option device 'radio1'
        option network 'lan'
        option mode 'ap'
        option ssid 'tobe50'
        option encryption 'sae-mixed'
        option key '88888888'
        option ieee80211w '1'
        

Max tx power is only 6dBm.
eeprom.zip

Start by reviewing the supplied eeprom.zip and the MT7615 driver entry points, then reproduce the reported values with iw list using the wireless configuration shown. Compare the 2.4 GHz and 5 GHz behavior to determine why both are limited to 6 dBm; done means the reported cap is corrected or its hardware-data cause is clearly established.