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Imre Deak 9cb1547891 drm/i915/dp_mst: Work around Thunderbolt sink disconnect after SINK_COUNT_ESI read 
Due to a problem in the iTBT DP-in adapter's firmware the sink on a TBT
link may get disconnected inadvertently if the SINK_COUNT_ESI and the
DP_LINK_SERVICE_IRQ_VECTOR_ESI0 registers are read in a single AUX
transaction. Work around the issue by reading these registers in
separate transactions.

The issue affects MTL+ platforms and will be fixed in the DP-in adapter
firmware, however releasing that firmware fix may take some time and is
not guaranteed to be available for all systems. Based on this apply the
workaround on affected platforms.

See HSD #13013007775.

v2: Cc'ing Mika Westerberg.

Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13760
Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/14147
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: stable@vger.kernel.org
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://lore.kernel.org/r/20250519133417.1469181-1-imre.deak@intel.com
(cherry picked from commit c3a48363cf)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
 		2025-05-22 09:25:57 +03:00
..
accel accel/amdxdna: Support submit commands without arguments 2025-05-08 09:58:21 -07:00
accessibility treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
acpi gcc-15: disable '-Wunterminated-string-initialization' entirely for now 2025-04-20 15:30:53 -07:00
amba
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android binder: fix offset calculation in debug log 2025-04-15 15:11:12 +02:00
ata ata: libata-scsi: Improve CDL control 2025-04-22 16:06:05 +09:00
atm treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
auxdisplay treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
base Modules fixes for v6.15-rc5 2025-04-30 08:37:52 -07:00
bcma
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block block-6.15-20250502 2025-05-02 10:24:37 -07:00
bluetooth Bluetooth: btintel_pcie: Add additional to checks to clear TX/RX paths 2025-04-25 15:03:19 -04:00
bus treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
cache
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cdrom
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cdx
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char Linux 6.15-rc5 2025-05-06 16:39:25 +10:00
clk ARM and clkdev updates for 6.15-rc1 2025-04-03 12:21:44 -07:00
clocksource RISC-V Patches for the 6.15 Merge Window, Part 1 2025-04-04 09:49:17 -07:00
comedi comedi: jr3_pci: Fix synchronous deletion of timer 2025-04-15 15:18:55 +02:00
connector
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counter Char/Misc fixes for 6.15-rc1 2025-04-02 18:03:34 -07:00
cpufreq cpufreq: intel_pstate: Unchecked MSR aceess in legacy mode 2025-04-30 16:27:34 +02:00
cpuidle
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crypto crypto: atmel-sha204a - Set hwrng quality to lowest possible 2025-04-23 09:32:57 +08:00
cxl cxl/core/regs.c: Skip Memory Space Enable check for RCD and RCH Ports 2025-04-21 08:30:13 -07:00
dax
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dca
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devfreq
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dio
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dma treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
dma-buf Merge tag 'drm-misc-next-2025-05-12' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next 2025-05-15 13:17:02 +10:00
dpll
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edac EDAC/altera: Set DDR and SDMMC interrupt mask before registration 2025-04-28 12:38:53 +02:00
eisa
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extcon
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firewire treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
firmware Linux 6.15-rc5 2025-05-06 16:39:25 +10:00
fpga fpga: tests: add module descriptions 2025-04-11 17:32:38 -07:00
fsi
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fwctl fwctl: Fix repeated device word in log message 2025-04-11 20:47:45 -03:00
gnss
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gpio gpiolib: Allow to use setters with return value for output-only gpios 2025-04-14 20:31:00 +02:00
gpu drm/i915/dp_mst: Work around Thunderbolt sink disconnect after SINK_COUNT_ESI read 2025-05-22 09:25:57 +03:00
greybus treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
hid treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
hsi treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
hte treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
hv Drivers: hv: Fix bad ref to hv_synic_eventring_tail when CPU goes offline 2025-04-25 21:13:53 +00:00
hwmon treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
hwspinlock
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hwtracing intel_th: avoid using deprecated page->mapping, index fields 2025-04-15 13:29:03 +02:00
i2c i2c: imx-lpi2c: Fix clock count when probe defers 2025-04-29 10:18:51 +02:00
i3c i3c: Add NULL pointer check in i3c_master_queue_ibi() 2025-03-31 11:44:00 +02:00
idle
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iio gcc-15: add '__nonstring' markers to byte arrays 2025-04-20 11:57:54 -07:00
infiniband RDMA/bnxt_re: Remove unusable nq variable 2025-04-10 14:47:55 -03:00
input gcc-15: add '__nonstring' markers to byte arrays 2025-04-20 11:57:54 -07:00
interconnect
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iommu IOMMU Fixes for Linux v6.15-rc4: 2025-05-02 08:57:00 -07:00
ipack
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irqchip irqchip/qcom-mpm: Prevent crash when trying to handle non-wake GPIOs 2025-05-02 21:07:02 +02:00
isdn treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
leds treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
macintosh treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
mailbox treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
mcb mcb: fix a double free bug in chameleon_parse_gdd() 2025-04-15 18:21:39 +02:00
md - dm: always update the array size in realloc_argv on success 2025-04-28 12:18:21 -07:00
media treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
memory treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
memstick treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
message SCSI misc on 20250326 2025-03-26 19:57:34 -07:00
mfd * Maxim MAX77705: 2025-03-29 14:33:13 -07:00
misc pci-v6.15-fixes-3 2025-04-26 13:02:36 -07:00
mmc mmc: renesas_sdhi: disable clocks if registering regulator failed 2025-04-07 17:58:41 +02:00
most treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
mtd mtd: rawnand: Add status chack in r852_ready() 2025-04-07 09:02:49 +02:00
mux
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net net: vertexcom: mse102x: Fix RX error handling 2025-05-01 07:24:05 -07:00
nfc treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
ntb Bug fixes for NTB Switchtec driver mw negative shift, Intel NTB link 2025-04-04 14:23:07 -07:00
nubus
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nvdimm libnvdimm additions for 6.15 2025-04-02 20:27:18 -07:00
nvme block-6.15-20250502 2025-05-02 10:24:37 -07:00
nvmem nvmem: qfprom: switch to 4-byte aligned reads 2025-04-11 14:41:22 +02:00
of Devicetree for v6.15: 2025-03-29 11:23:16 -07:00
opp
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parisc
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parport treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
pci pci-v6.15-fixes-3 2025-04-26 13:02:36 -07:00
pcmcia treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
peci
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perf pci-v6.15-changes 2025-03-28 19:36:53 -07:00
phy phy-for-6.15 2025-04-01 12:47:11 -07:00
pinctrl pinctrl: qcom: Fix PINGROUP definition for sm8750 2025-04-29 10:27:25 +02:00
platform Linux 6.15-rc5 2025-05-06 16:39:25 +10:00
pmdomain
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pnp Staging driver updates for 6.15-rc1 2025-04-02 18:09:17 -07:00
power gcc-15: get rid of misc extra NUL character padding 2025-04-20 11:57:54 -07:00
powercap
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pps pps: generators: tio: fix platform_set_drvdata() 2025-04-15 18:22:32 +02:00
ps3
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ptp ptp: ocp: Fix NULL dereference in Adva board SMA sysfs operations 2025-05-01 07:01:31 -07:00
pwm pwm: A set of fixes for pwm core and various drivers 2025-04-12 08:11:19 -07:00
rapidio
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ras RAS/AMD/FMPM: Get masked address 2025-04-08 19:30:58 +02:00
regulator These are objtool fixes and updates by Josh Poimboeuf, centered 2025-04-02 10:30:10 -07:00
remoteproc
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reset remoteproc updates for v6.15 2025-03-29 17:18:50 -07:00
rpmsg
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rtc treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
s390 s390/virtio_ccw: Don't allocate/assign airqs for non-existing queues 2025-04-09 12:12:41 +02:00
sbus
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scsi SCSI fixes on 20250502 2025-05-02 11:14:58 -07:00
sh
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siox
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slimbus
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soc soc: drivers for 6.15, part 2 2025-04-04 09:06:32 -07:00
soundwire soundwire: intel_auxdevice: Fix system suspend/resume handling 2025-04-30 16:23:37 +02:00
spi spi: Fixes for v6.15 2025-05-02 16:33:50 -07:00
spmi
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ssb
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staging treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
target scsi: target: iscsi: Fix timeout on deleted connection 2025-04-11 22:13:00 -04:00
tc
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tee
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thermal thermal: intel: int340x: Fix Panther Lake DLVR support 2025-04-15 18:57:25 +02:00
thunderbolt USB/Thunderbolt update for 6.15-rc1 2025-04-02 18:23:31 -07:00
tty serial: sifive: lock port in startup()/shutdown() callbacks 2025-04-15 15:02:39 +02:00
ufs scsi: ufs: core: Remove redundant query_complete trace 2025-04-28 21:23:29 -04:00
uio
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usb USB-serial device ids for 6.15-rc3 2025-04-18 06:49:40 +02:00
vdpa
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vfio vfio/pci: Virtualize zero INTx PIN if no pdev->irq 2025-04-14 08:31:45 -06:00
vhost vhost-scsi: Fix vhost_scsi_send_status() 2025-04-18 10:08:11 -04:00
video Merge drm/drm-next into drm-misc-next 2025-04-07 14:35:48 +02:00
virt treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
virtio virtgpu: don't reset on shutdown 2025-04-18 10:05:49 -04:00
w1
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watchdog treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
xen x86/xen: fix balloon target initialization for PVH dom0 2025-04-07 11:24:12 +02:00
zorro
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Kconfig
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Makefile
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