AuxXxilium/linux_dsm_epyc7002
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1f1be49fb6
linux_dsm_epyc7002/drivers
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Imre Deak 1f1be49fb6 drm/i915: Avoid HPD poll detect triggering a new detect cycle 
For the HPD interrupt functionality the HW depends on power wells in the
display core domain to be on. Accordingly when enabling these power
wells the HPD polling logic will force an HPD detection cycle to account
for hotplug events that may have happened when such a power well was
off.

Thus a detect cycle started by polling could start a new detect cycle if
a power well in the display core domain gets enabled during detect and
stays enabled after detect completes. That in turn can lead to a
detection cycle runaway.

To prevent re-triggering a poll-detect cycle make sure we drop all power
references we acquired during detect synchronously by the end of detect.
This will let the poll-detect logic continue with polling (matching the
off state of the corresponding power wells) instead of scheduling a new
detection cycle.

Fixes: 6cfe7ec02e ("drm/i915: Remove the unneeded AUX power ref from intel_dp_detect()")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=112125
Reported-and-tested-by: Val Kulkov <val.kulkov@gmail.com>
Reported-and-tested-by: wangqr <wqr.prg@gmail.com>
Cc: Val Kulkov <val.kulkov@gmail.com>
Cc: wangqr <wqr.prg@gmail.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191028181517.22602-1-imre.deak@intel.com
(cherry picked from commit a8ddac7c9f)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2019-11-04 13:24:11 -08:00
..
accessibility
acpi Power management fix for 5.4-rc6 2019-11-01 09:30:48 -07:00
amba ARM updates for 5.4-rc: 2019-10-23 06:26:33 -04:00
android binder: Don't modify VMA bounds in ->mmap handler 2019-10-17 05:58:44 -07:00
ata ata: libahci_platform: Fix regulator_get_optional() misuse 2019-10-25 14:22:20 -06:00
atm
auxdisplay
base PM: QoS: Drop frequency QoS types from device PM QoS 2019-10-21 02:05:21 +02:00
bcma
block nbd: verify socket is supported during setup 2019-10-25 14:37:21 -06:00
bluetooth
bus bus: ti-sysc: Fix watchdog quirk handling 2019-10-18 08:45:32 -07:00
cdrom
char char/random: Add a newline at the end of the file 2019-10-02 13:49:43 -07:00
clk Merge tag 'fix-missing-panels' into fixes 2019-10-04 09:06:41 -07:00
clocksource timer-of: don't use conditional expression with mixed 'void' types 2019-10-02 16:16:07 -07:00
connector
counter
cpufreq cpufreq: Cancel policy update work scheduled before freeing 2019-10-22 18:07:30 +02:00
cpuidle cpuidle: haltpoll: Take 'idle=' override into account 2019-10-22 11:43:17 +02:00
crypto inet: stop leaking jiffies on the wire 2019-11-01 14:57:52 -07:00
dax
dca
devfreq
dio
dma dmaengine: cppi41: Fix cppi41_dma_prep_slave_sg() when idle 2019-10-23 21:15:21 +05:30
dma-buf dma-buf/resv: fix exclusive fence get 2019-10-10 17:05:20 +02:00
edac EDAC/ghes: Fix Use after free in ghes_edac remove path 2019-10-17 11:27:05 +02:00
eisa
extcon
firewire
firmware efi/efi_test: Lock down /dev/efi_test and require CAP_SYS_ADMIN 2019-10-31 09:40:21 +01:00
fpga
fsi
gnss
gpio gpio: lynxpoint: set default handler to be handle_bad_irq() 2019-10-15 01:19:05 +02:00
gpu drm/i915: Avoid HPD poll detect triggering a new detect cycle 2019-11-04 13:24:11 -08:00
greybus
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid 2019-10-28 14:26:33 +01:00
hsi
hv Drivers: hv: vmbus: Fix harmless building warnings without CONFIG_PM_SLEEP 2019-10-01 14:49:45 -04:00
hwmon hwmon: (ina3221) Fix read timeout issue 2019-10-28 18:46:55 -07:00
hwspinlock
hwtracing
i2c i2c: stm32f7: remove warning when compiling with W=1 2019-10-24 20:52:21 +02:00
i3c
ide
idle
iio First set of IIO fixes for the 5.4 cycle. 2019-10-10 11:18:37 +02:00
infiniband RDMA/hns: Prevent memory leaks of eq->buf_list 2019-10-28 15:06:38 -03:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2019-10-25 17:31:53 -04:00
interconnect
iommu iommu/vt-d: Fix panic after kexec -p for kdump 2019-10-30 10:30:22 +01:00
ipack
irqchip irqchip updates for 5.4, take 2 2019-10-25 14:25:15 +02:00
isdn net: use skb_queue_empty_lockless() in poll() handlers 2019-10-28 13:33:41 -07:00
leds
lightnvm
macintosh cpufreq: Use per-policy frequency QoS 2019-10-21 02:05:21 +02:00
mailbox
mcb
md for-linus-2019-10-18 2019-10-18 22:29:36 -04:00
media media: stkwebcam: fix runtime PM after driver unbind 2019-10-04 14:38:46 +02:00
memory
memstick memstick: jmb38x_ms: Fix an error handling path in 'jmb38x_ms_probe()' 2019-10-09 11:08:03 +02:00
message
mfd mfd: mt6397: Fix probe after changing mt6397-core 2019-10-24 08:49:25 +01:00
misc misc: fastrpc: prevent memory leak in fastrpc_dma_buf_attach 2019-10-04 18:22:14 +02:00
mmc mmc: mxs: fix flags passed to dmaengine_prep_slave_sg 2019-10-21 16:16:38 +02:00
mtd mtd: rawnand: au1550nd: Fix au_read_buf16() prototype 2019-10-07 09:56:36 +02:00
mux
net r8169: fix wrong PHY ID issue with RTL8168dp 2019-11-01 15:09:40 -07:00
nfc NFC: pn533: fix use-after-free and memleaks 2019-10-08 16:52:26 -07:00
ntb
nubus
nvdimm libnvdimm fixes v5.4-rc1 2019-09-29 10:33:41 -07:00
nvme Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-11-01 17:48:11 -07:00
nvmem
of of: reserved_mem: add missing of_node_put() for proper ref-counting 2019-10-23 15:15:05 -05:00
opp opp: Reinitialize the list_kref before adding the static OPPs again 2019-10-23 10:58:44 +05:30
oprofile
parisc parisc: Remove 32-bit DMA enforcement from sba_iommu 2019-10-14 21:44:26 +02:00
parport
pci PCI: PM: Fix pci_power_up() 2019-10-15 23:51:36 +02:00
pcmcia Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
perf
phy
pinctrl pinctrl: aspeed-g6: Rename SD3 to EMMC and rework pin groups 2019-10-16 15:58:27 +02:00
platform platform/x86: i2c-multi-instantiate: Fail the probe if no IRQ provided 2019-10-14 15:31:50 +03:00
pnp
power
powercap
pps
ps3
ptp ptp: fix typo of "mechanism" in Kconfig help text 2019-10-07 14:55:46 -04:00
pwm Revert "pwm: Let pwm_get_state() return the last implemented state" 2019-10-21 16:48:52 +02:00
rapidio
ras
regulator regulator: Fixes for v5.4 2019-10-23 15:31:17 -04:00
remoteproc
reset ARM: SoC fixes 2019-09-30 10:04:28 -07:00
rpmsg
rtc
s390 s390/zcrypt: fix memleak at release 2019-10-22 17:55:51 +02:00
sbus
scsi SCSI fixes on 20191101 2019-11-02 11:15:52 -07:00
sfi
sh
siox
slimbus
soc soc: imx: imx-scu: Getting UID from SCU should have response 2019-10-06 09:21:38 +08:00
soundwire
spi
spmi
ssb
staging staging: wlan-ng: fix exit return when sme->key_idx >= NUM_WEPKEYS 2019-10-14 15:40:08 +02:00
target SCSI fixes on 20191101 2019-11-02 11:15:52 -07:00
tc
tee tee/shm: untag user pointers in tee_shm_register 2019-09-25 17:51:41 -07:00
thermal cpufreq: Use per-policy frequency QoS 2019-10-21 02:05:21 +02:00
thunderbolt
tty 8250-men-mcb: fix error checking when get_num_ports returns -ENODEV 2019-10-15 21:38:41 +02:00
uio
usb usb: dwc3: gadget: fix race when disabling ep with cancelled xfers 2019-10-31 18:57:54 +01:00
vfio vfio/type1: Initialize resv_msi_base 2019-10-15 14:07:01 -06:00
vhost vringh: fix copy direction of vringh_iov_push_kern() 2019-10-28 04:25:04 -04:00
video video/logo: do not generate unneeded logo C files 2019-10-05 15:29:49 +09:00
virt virt: vbox: fix memory leak in hgcm_call_preprocess_linaddr 2019-10-10 14:50:32 +02:00
virtio virtio_ring: fix stalls for packed rings 2019-10-28 04:24:46 -04:00
visorbus
vlynq
vme
w1 w1: ds250x: Fix build error without CRC16 2019-10-10 15:35:41 +02:00
watchdog linux-watchdog 5.4-rc1 tag 2019-09-27 11:17:38 -07:00
xen Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-10-19 17:09:11 -04:00
zorro
Kconfig
Makefile