kernel/linux.git/drivers/input/touchscreen/apple_z2.c, branch v6.19.12Linux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=v6.19.122025-12-18T20:17:10+00:00Input: apple_z2 - fix reading incorrect reports after exiting sleep2025-12-18T20:17:10+00:00Sasha Finkelsteinfnkl.kernel@gmail.com2025-12-18T18:15:23+00:00urn:sha1:d579478cee228bdc0029a0c12a1f6a63ea9d1c77
Under certain conditions (more prevalent after a suspend/resume cycle),
the touchscreen controller can send the "boot complete" interrupt before
it actually finished booting. In those cases, attempting to read touch
data resuls in a stream of "not ready" messages being read and
interpreted as a touch report. Check that the response is in fact a
touch report and discard it otherwise.
Reported-by: pitust <piotr@stelmaszek.com>
Closes: https://oftc.catirclogs.org/asahi/2025-12-17#34878715;
Fixes: 471a92f8a21a ("Input: apple_z2 - add a driver for Apple Z2 touchscreens")
Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Link: https://patch.msgid.link/20251218-z2-init-fix-v1-1-48e3aa239caf@gmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Input: apple_z2 - add a driver for Apple Z2 touchscreens2025-02-19T21:56:38+00:00Sasha Finkelsteinfnkl.kernel@gmail.com2025-02-19T17:24:56+00:00urn:sha1:471a92f8a21a0e0219e254df7b07133b4f121f33
Adds a driver for Apple touchscreens using the Z2 protocol.
Signed-off-by: Janne Grunau <j@jannau.net>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Link: https://lore.kernel.org/r/20250217-z2-v6-2-c2115d6e5a8f@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>