Some client, like iPhone, always has frequent PS (Power Saving) state change like this:
sdr0: STA e2:72:49:82:a6:a0 aid 1 enters power save mode
sdr0: STA e2:72:49:82:a6:a0 aid 1 exits power save mode
sdr0: STA e2:72:49:82:a6:a0 aid 1 sending 0 filtered/0 PS frames since STA woke up
Now with these correct hw flag setting, the link is more stable
1. test_mode 0 -- normal, no aggregation (AMPDU); test_mode 1 -- experimental, has AMPDU support
2. init_tx_att -- initial tx attenuation in dB*1000 format. example: put 20000 for 20dB
By default the TID is disabled in FPGA, because we currently try to TX and RX traffic for all TIDs. So, the TID related operations in sdr.c are removed.
1. Remove the last_auto_fpga_lbt_th saving from sdrctl set reg command. Otherwise, repeated sdrctl set reg will save wrong value into last_auto_fpga_lbt_th
2. The last_auto_fpga_lbt_th is only set in ad9361_rf_set_channel, which is called at least once by Linux after NIC is up
1. The issue only happens at zcu102 side, when it is tested as AP together with zedboard
2. The issue does not happen when zcu102 is client and zedboard is AP
3. The issue (most likely) does not happen in places other than iGent (like Pablo home)
4. Sometimes it does happen at my home when I test zcu102 as AP together with COTS WiFi
5. Indeed seems like the environment related. Guess some quick small packets in the environment quickly flush/round-up/mess-up the rx dma cyclic buffer, and the rx interrupt internal static variable target_buf_idx_old loses track of the background automatic rx dma cyclic buffer
6. The fix is for all board types (zcu102, zedboard, 7035, etc)
7. The driver compiling make_all.sh script generates USE_NEW_RX_INTERRUPT macro to pre_def.h to enable the new code (while keeping the old code). You can use the script as before.
8. The logic of the fix is that exhaustive search all the rx dma cyclic buffer in rx interrupt to get packet to Linux in the first place.
we do not maintain our own (modified) ad9361 driver anymore! The original ad9361 driver in the Linux kernel tree can be used with some extra EXPORT_SYMBOL.
