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Coiby Xu 063bfcf4ac pinctrl: amd: remove debounce filter setting in IRQ type setting commit `47a0001436` upstream. Debounce filter setting should be independent from IRQ type setting because according to the ACPI specs, there are separate arguments for specifying debounce timeout and IRQ type in GpioIo() and GpioInt(). Together with commit `06abe8291b` ("pinctrl: amd: fix incorrect way to disable debounce filter") and Andy's patch "gpiolib: acpi: Take into account debounce settings" [1], this will fix broken touchpads for laptops whose BIOS set the debounce timeout to a relatively large value. For example, the BIOS of Lenovo AMD gaming laptops including Legion-5 15ARH05 (R7000), Legion-5P (R7000P) and IdeaPad Gaming 3 15ARH05, set the debounce timeout to 124.8ms. This led to the kernel receiving only ~7 HID reports per second from the Synaptics touchpad (MSFT0001:00 06CB:7F28). Existing touchpads like [2][3] are not troubled by this bug because the debounce timeout has been set to 0 by the BIOS before enabling the debounce filter in setting IRQ type. [1] https://lore.kernel.org/linux-gpio/20201111222008.39993-11-andriy.shevchenko@linux.intel.com/ `8dcb7a15a5` ("gpiolib: acpi: Take into account debounce settings") [2] https://github.com/Syniurge/i2c-amd-mp2/issues/11#issuecomment-721331582 [3] https://forum.manjaro.org/t/random-short-touchpad-freezes/30832/28 Signed-off-by: Coiby Xu <coiby.xu@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/linux-gpio/CAHp75VcwiGREBUJ0A06EEw-SyabqYsp%2Bdqs2DpSrhaY-2GVdAA%40mail.gmail.com/ BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1887190 Link: https://lore.kernel.org/r/20201125130320.311059-1-coiby.xu@gmail.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-12-30 11:25:39 +01:00
arch	ARC: stack unwinding: don't assume non-current task is sleeping	2020-12-30 11:25:38 +01:00
block	blk-cgroup: Pre-allocate tree node on blkg_conf_prep	2020-11-10 12:35:59 +01:00
certs	export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR()	2018-08-22 23:21:44 +09:00
crypto	crypto: algif_skcipher - EBUSY on aio should be an error	2020-10-29 09:55:01 +01:00
Documentation	dt-bindings: net: correct interrupt flags in examples	2020-12-08 10:18:55 +01:00
drivers	pinctrl: amd: remove debounce filter setting in IRQ type setting	2020-12-30 11:25:39 +01:00
firmware	Fix built-in early-load Intel microcode alignment	2020-01-23 08:21:29 +01:00
fs	gfs2: check for empty rgrp tree in gfs2_ri_update	2020-12-11 13:25:04 +01:00
include	spi: Introduce device-managed SPI controller allocation	2020-12-11 13:25:03 +01:00
init	printk: reduce LOG_BUF_SHIFT range for H8300	2020-11-05 11:08:41 +01:00
ipc	ipc/util.c: sysvipc_find_ipc() incorrectly updates position index	2020-05-20 08:18:40 +02:00
kernel	tracing: Fix userstacktrace option for instances	2020-12-11 13:25:03 +01:00
lib	random32: make prandom_u32() output unpredictable	2020-11-18 19:18:52 +01:00
LICENSES	LICENSES: Remove CC-BY-SA-4.0 license text	2018-10-18 11:28:50 +02:00
mm	mm/swapfile: do not sleep with a spin lock held	2020-12-11 13:25:02 +01:00
net	netfilter: nf_tables: avoid false-postive lockdep splat	2020-12-11 13:25:04 +01:00
samples	misc: vop: add round_up(x,4) for vring_size to avoid kernel panic	2020-10-30 10:38:29 +01:00
scripts	scripts/setlocalversion: make git describe output more reliable	2020-11-05 11:08:31 +01:00
security	selinux: Fix error return code in sel_ib_pkey_sid_slow()	2020-11-18 19:18:50 +01:00
sound	ALSA: hda/generic: Add option to enforce preferred_dacs pairs	2020-12-11 13:25:01 +01:00
tools	x86/uprobes: Do not use prefixes.nbytes when looping over prefixes.bytes	2020-12-11 13:25:02 +01:00
usr	initramfs: restore default compression behavior	2020-04-13 10:44:59 +02:00
virt	KVM: arm64: vgic-v3: Drop the reporting of GICR_TYPER.Last for userspace	2020-12-02 08:48:07 +01:00
.clang-format	clang-format: Set IndentWrappedFunctionNames false	2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes	.gitattributes: set git diff driver for C source code files	2016-10-07 18:46:30 -07:00
.gitignore	Kbuild updates for v4.17 (2nd)	2018-04-15 17:21:30 -07:00
.mailmap	libnvdimm-for-4.19_misc	2018-08-25 18:13:10 -07:00
COPYING	COPYING: use the new text with points to the license files	2018-03-23 12:41:45 -06:00
CREDITS	9p: remove Ron Minnich from MAINTAINERS	2018-08-17 16:20:26 -07:00
Kbuild	Kbuild updates for v4.15	2017-11-17 17:45:29 -08:00
Kconfig	kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt	2018-08-02 08:06:55 +09:00
MAINTAINERS	Documentation/llvm: add documentation on building w/ Clang/LLVM	2020-09-26 18:01:31 +02:00
Makefile	Kbuild: do not emit debug info for assembly with LLVM_IAS=1	2020-12-30 11:25:37 +01:00
README	Docs: Added a pointer to the formatted docs to README	2018-03-21 09:02:53 -06:00

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.