I connected a device (let’s call it DevA) to the DragonBoard 410c through the HSUART connection.
At the beginning all is going well as datas are exchanged then the UART goes to sleep mode.
After 10s, the device DevA send data to the DragonBoard but these dats are not received by the kernel driver.
It seems that after a sleep, the callback notification from the SPS driver (msm_hs_sps_rx_callback function in msm_serial_hs.c) is never called even if the wakeup interupt is set.
Any clue why the SPS BAM driver does not wake up?