[Xiaomi Mi 5s ROMs, Kernels, Recoveries, & Other De] j1505243:
For grep "touch":

[ 0.965340] captouch soc:qcom,captouch: captouch_probe: ENTRY
[ 13.470565] captouch soc:qcom,captouch: captouch_ioctl: Home-key enabled
[ 19.535934] captouch soc:qcom,captouch: captouch_ioctl: Home-key disabled
[ 19.550000] captouch soc:qcom,captouch: captouch_ioctl: Home-key enabled
[ 19.550188] captouch soc:qcom,captouch: captouch_ioctl: Home-key disabled
[ 19.604841] captouch soc:qcom,captouch: captouch_ioctl: Home-key enabled
[ 19.605202] captouch soc:qcom,captouch: captouch_ioctl: Home-key disabled
[ 19.659871] captouch soc:qcom,captouch: captouch_ioctl: Home-key enabled
[ 19.660251] captouch soc:qcom,captouch: captouch_ioctl: Home-key disabled
[ 19.712185] captouch soc:qcom,captouch: captouch_ioctl: Home-key enabled
[ 19.712285] captouch soc:qcom,captouch: captouch_ioctl: Home-key disabled
[ 19.767606] captouch soc:qcom,captouch: captouch_ioctl: Home-key enabled
[ 19.767894] captouch soc:qcom,captouch: captouch_ioctl: Home-key disabled
[ 19.830354] captouch soc:qcom,captouch: captouch_ioctl: Home-key enabled
[ 59.710797] captouch soc:qcom,captouch: captouch_key_report: key_status = 1 (1:down 0:up)
[ 59.710807] captouch soc:qcom,captouch: captouch_get_status: homekey_enabled = true
[ 59.776788] captouch soc:qcom,captouch: captouch_key_report: key_status = 0 (1:down 0:up)
[ 59.776799] captouch soc:qcom,captouch: captouch_get_status: homekey_enabled = true
[ 138.315068] captouch soc:qcom,captouch: captouch_key_report: key_status = 1 (1:down 0:up)
[ 138.315082] captouch soc:qcom,captouch: captouch_get_status: homekey_enabled = true
[ 138.421298] captouch soc:qcom,captouch: captouch_key_report: key_status = 0 (1:down 0:up)
[ 138.421311] captouch soc:qcom,captouch: captouch_get_status: homekey_enabled = true
[ 143.009125] synaptics_dsi_force 12-0020: (captouch) fake report captouch keydown~!!
[ 143.009202] captouch soc:qcom,captouch: captouch_key_report: key_status = 1 (1:down 0:up)
[ 442.268482] captouch soc:qcom,captouch: captouch_key_report: key_status = 1 (1:down 0:up)
[ 442.268546] captouch soc:qcom,captouch: captouch_get_status: homekey_enabled = true
[ 442.331845] captouch soc:qcom,captouch: captouch_key_report: key_status = 0 (1:down 0:up)
[ 442.331862] captouch soc:qcom,captouch: captouch_get_status: homekey_enabled = true
[ 444.372382] synaptics_dsi_force 12-0020: Enable touch irq wake
[ 444.554994] synaptics_dsi_force 12-0020: Disable touch irq wake
[ 447.645113] synaptics_dsi_force 12-0020: (captouch) fake report captouch keydown~!!
[ 447.645180] captouch soc:qcom,captouch: captouch_key_report: key_status = 1 (1:down 0:up)
[ 449.971258] captouch soc:qcom,captouch: captouch_key_report: key_status = 1 (1:down 0:up)
[ 449.971281] captouch soc:qcom,captouch: captouch_get_status: homekey_enabled = true
[ 450.060609] captouch soc:qcom,captouch: captouch_key_report: key_status = 0 (1:down 0:up)
[ 450.060621] captouch soc:qcom,captouch: captouch_get_status: homekey_enabled = true
[ 555.312130] captouch soc:qcom,captouch: captouch_key_report: key_status = 1 (1:down 0:up)
[ 555.312183] captouch soc:qcom,captouch: captouch_get_status: homekey_enabled = true
[ 555.425851] captouch soc:qcom,captouch: captouch_key_report: key_status = 0 (1:down 0:up)
[ 555.425874] captouch soc:qcom,captouch: captouch_get_status: homekey_enabled = true

For grep "synaptics":

[ 1.852842] synaptics_rmi4_f12_init 2724: fhandler->full_addr.query_base = 0x004c
[ 1.852851] synaptics_rmi4_f12_init 2725: fhandler->full_addr.ctrl_base = 0x0013
[ 1.852857] synaptics_rmi4_f12_init 2726: size_of_query5 = 9
[ 1.852863] synaptics_rmi4_f12_init 2732: size_of_query5 = 9
[ 1.861421] synaptics_rmi4_f12_init 2936: extra_data->data29_offset = 3
[ 1.861431] synaptics_rmi4_f12_init 2937: extra_data->data29_size = 2
[ 1.861436] synaptics_rmi4_f12_init 2938: ctrl_58_offset = 18
[ 1.861442] synaptics_rmi4_f12_init 2947: rmi4_data->force_min = 100
[ 1.861448] synaptics_rmi4_f12_init 2948: rmi4_data->force_max = 800
[ 1.868712] input: synaptics_dsx as /devices/soc/75ba000.i2c/i2c-12/12-0020/input/input2
[ 1.869172] synaptics_dsi_force 12-0020: chip info: 0x53 0x33 0x33 0x33 0x31 0x00 0x00 0x00
[ 2.371800] synaptics_rmi4_fwu_init: fwu->in_ub_mode = 0
[ 2.390001] synaptics_dsi_force 12-0020: fwu_read_f34_guest_serialization_partition: Lockdown info: 0x31 0x31 0x31 0x5 0x41 0x37 0x31 0x0
[ 2.391189] synaptics_dsi_force 12-0020: fwu_get_firmware_name: Choose firmware synaptics_jdi_3331_a7.fw
[ 2.402070] synaptics_dsi_force 12-0020: fwu_start_reflash: Start of reflash process
[ 2.402806] synaptics_dsi_force 12-0020: fwu_go_nogo: Device firmware ID = 2521929
[ 2.402815] synaptics_dsi_force 12-0020: fwu_go_nogo: Image firmware ID = 2521929
[ 2.404166] synaptics_dsi_force 12-0020: fwu_go_nogo: No need to do reflash
[ 20.983422] synaptics_dsi_force 12-0020: Set input event value = 5
[ 37.746438] synaptics_dsi_force 12-0020: Set input event value = 5
[ 143.009125] synaptics_dsi_force 12-0020: (captouch) fake report captouch keydown~!!
[ 143.088028] synaptics_rmi4_sensor_report: spontaneous reset detected
[ 444.372382] synaptics_dsi_force 12-0020: Enable touch irq wake
[ 444.473260] msm_pinctrl_resume: 480 triggered synaptics_dsx
[ 444.473657] Wakeup IRQ detected during suspend: 480 synaptics_dsx
[ 444.554994] synaptics_dsi_force 12-0020: Disable touch irq wake
[ 444.667624] synaptics_rmi4_sensor_report: spontaneous reset detected
[ 447.645113] synaptics_dsi_force 12-0020: (captouch) fake report captouch keydown~!!
[ 447.717861] synaptics_rmi4_sensor_report: spontaneous reset detected
[ 559.517586] synaptics_rmi4_sensor_report: spontaneous reset detected

So what I should report to the Xiaomi is "Synaptics digitizer firmware - synaptics_dsi_force - synaptics_jdi_3331_a7.fw"?