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Mika Westerberg f8b9b2229e thunderbolt: Use different lane for second DisplayPort tunnel 
[ Upstream commit 9d2d0a5cf0 ]

Brad reported that on Apple hardware with Light Ridge or Falcon Ridge
controller, plugging in a chain of Thunderbolt displays (Light Ridge
based controllers) causes all kinds of tearing and flickering. The
reason for this is that on Thunderbolt 1 hardware there is no lane
bonding so we have two independent 10 Gb/s lanes, and currently Linux
tunnels both displays through the lane 1. This makes the displays to
share the 10 Gb/s bandwidth which may not be enough for higher
resolutions.

For this reason make the second tunnel go through the lane 0 instead.
This seems to match what the macOS connection manager is also doing.

Reported-by: Brad Campbell <lists2009@fnarfbargle.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Brad Campbell <lists2009@fnarfbargle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-06-14 18:45:09 +02:00
arch bpf, arm64: Clear prog->jited_len along prog->jited 2022-06-14 18:45:06 +02:00
block blk-mq: do not update io_ticks with passthrough requests 2022-06-14 18:44:57 +02:00
certs Kbuild updates for v5.18 2022-03-31 11:59:03 -07:00
crypto crypto: cryptd - Protect per-CPU resource by disabling BH. 2022-06-09 10:30:30 +02:00
Documentation rtla/Makefile: Properly handle dependencies 2022-06-14 18:45:03 +02:00
drivers thunderbolt: Use different lane for second DisplayPort tunnel 2022-06-14 18:45:09 +02:00
fs NFSD: Fix potential use-after-free in nfsd_file_put() 2022-06-14 18:45:04 +02:00
include iio: st_sensors: Add a local lock for protecting odr 2022-06-14 18:45:08 +02:00
init Kconfig: Add option for asm goto w/ tied outputs to workaround clang-13 bug 2022-06-09 10:30:49 +02:00
ipc ipc/mqueue: use get_tree_nodev() in mqueue_get_tree() 2022-06-09 10:30:30 +02:00
kernel tracing: Avoid adding tracer option before update_tracer_options 2022-06-14 18:45:01 +02:00
lib iov_iter: Fix iter_xarray_get_pages{,_alloc}() 2022-06-14 18:45:08 +02:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm mm/memremap: fix missing call to untrack_pfn() in pagemap_range() 2022-06-09 10:30:52 +02:00
net net: seg6: fix seg6_lookup_any_nexthop() to handle VRFs using flowi_l3mdev 2022-06-14 18:45:08 +02:00
samples samples/landlock: Format with clang-format 2022-06-09 10:30:46 +02:00
scripts modpost: fix removing numeric suffixes 2022-06-14 18:44:54 +02:00
security ima: remove the IMA_TEMPLATE Kconfig option 2022-06-09 10:30:49 +02:00
sound ASoC: fsl_sai: Fix FSL_SAI_xDR/xFR definition 2022-06-14 18:44:53 +02:00
tools selftests net: fix bpf build error 2022-06-14 18:45:05 +02:00
usr Kbuild updates for v5.18 2022-03-31 11:59:03 -07:00
virt KVM: Free new dirty bitmap if creating a new memslot fails 2022-05-20 13:02:05 -04:00
.clang-format genirq/msi: Make interrupt allocation less convoluted 2021-12-16 22:22:20 +01:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap hotfixes for 5.18-rc7 2022-05-13 10:22:37 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: replace a Microchip AT91 maintainer 2022-02-09 11:30:01 +01:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Merge branch 'arm/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc 2022-05-18 14:07:43 -10:00
Makefile Linux 5.18.3 2022-06-09 10:30:57 +02:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -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.

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.