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| author | Alexei Turtanov <9alexei9@gmail.com> | 2026-08-28 14:22:39 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2026-08-28 05:03:22 -0700 |
| commit | aefbda23eeba234c3ff0f135dc5be6e294bd25a6 (patch) | |
| tree | 7661d1d8d4e84dd519b5dc26354dc6adf65bd81e /tools/perf/scripts/python/bin/stackcollapse-report | |
| parent | 4d7fa28e151a6a6f24098d9e60f558f8ea61ddaa (diff) | |
| download | linux-next-aefbda23eeba234c3ff0f135dc5be6e294bd25a6.tar.gz linux-next-aefbda23eeba234c3ff0f135dc5be6e294bd25a6.zip | |
Input: atkbd - skip deactivate for Xiaomi Redmi Book Pro 16 2026
The internal keyboard of the Xiaomi Redmi Book Pro 16 2026 (board TM2425)
does not work: atkbd_probe() succeeds and every command is ACKed, but no
scancodes ever arrive afterwards.
Testing on the hardware through serio_raw shows that ATKBD_CMD_RESET_DIS
(0xF5) is the culprit. After 0xF5 the embedded controller keeps ACKing
commands but stops delivering scancodes, and neither ATKBD_CMD_ENABLE
(0xF4) nor ATKBD_CMD_RESET_BAT (0xFF) bring them back. Only re-enabling
the keyboard interface at the controller level (i8042 command 0xAE, or
rewriting the command byte as i8042_port_close() does) revives it.
Running the init sequence without 0xF5 (0xED 0x00, 0xF3 0x00, 0xF4)
keeps the keyboard working.
'i8042.dumbkbd=1' also works around this, but then the driver never
writes to the keyboard and the LEDs cannot be controlled. Use the
existing atkbd_deactivate_fixup quirk instead, as done for the sibling
TM2424 by commit 3a046db33bb9 ("Input: atkbd - skip deactivate for
Xiaomi Book Pro 14's internal keyboard"). Tested on v7.2: keyboard,
Caps Lock LED and s2idle suspend/resume all work.
DMI: XIAOMI REDMI Book Pro 16 2026/TM2425, BIOS RMAPT6B0P0909 05/22/2026
Fixes: 9cf6e24c9fbf ("Input: atkbd - do not skip atkbd_deactivate() when skipping ATKBD_CMD_GETID")
Cc: stable@vger.kernel.org
Signed-off-by: Alexei Turtanov <9alexei9@gmail.com>
Link: https://patch.msgid.link/20260828112239.18081-1-9alexei9@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-report')
0 files changed, 0 insertions, 0 deletions