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Arindam Nath 62b68367b7 drm/radeon: fix DP link training issue with second 4K monitor 
commit 1a738347df2ee4977459a8776fe2c62196bdcb1b upstream.

There is an issue observed when we hotplug a second DP
4K monitor to the system. Sometimes, the link training
fails for the second monitor after HPD interrupt
generation.

The issue happens when some queued or deferred transactions
are already present on the AUX channel when we initiate
a new transcation to (say) get DPCD or during link training.

We set AUX_IGNORE_HPD_DISCON bit in the AUX_CONTROL
register so that we can ignore any such deferred
transactions when a new AUX transaction is initiated.

Signed-off-by: Arindam Nath <arindam.nath@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-18 17:06:57 -07:00
..
accessibility
acpi ACPI / processor: Request native thermal interrupt handling via _OSC 2016-05-11 11:21:26 +02:00
amba
android drivers: android: correct the size of struct binder_uintptr_t for BC_DEAD_BINDER_DONE 2016-03-03 15:07:10 -08:00
ata ata: ahci-platform: Add ports-implemented DT bindings. 2016-05-11 11:21:21 +02:00
atm
auxdisplay
base regmap: spmi: Fix regmap_spmi_ext_read in multi-byte case 2016-05-18 17:06:48 -07:00
bcma
block nbd: ratelimit error msgs after socket close 2016-05-11 11:21:10 +02:00
bluetooth Bluetooth: Add new AR3012 ID 0489:e095 2016-04-12 09:08:54 -07:00
bus bus: imx-weim: Take the 'status' property value into account 2016-05-04 14:48:54 -07:00
cdrom
char tpm: fix the cleanup of struct tpm_chip 2016-04-12 09:08:47 -07:00
clk clk: qcom: msm8960: Fix ce3_src register offset 2016-05-11 11:21:12 +02:00
clocksource clockevents/tcb_clksrc: Prevent disabling an already disabled clock 2016-03-03 15:07:15 -08:00
connector connector: bump skb->users before callback invocation 2016-01-04 21:46:45 -05:00
cpufreq cpufreq: intel_pstate: Fix processing for turbo activation ratio 2016-05-04 14:48:44 -07:00
cpuidle ARM: cpuidle: Pass on arm_cpuidle_suspend()'s return value 2016-05-11 11:21:19 +02:00
crypto crypto: qat - fix invalid pf2vf_resp_wq logic 2016-05-18 17:06:45 -07:00
dca
devfreq
dio
dma dmaengine: pxa_dma: fix the maximum requestor line 2016-05-04 14:48:42 -07:00
dma-buf dma-buf/fence: add fence_wait_any_timeout function v2 2015-10-30 01:16:16 -04:00
edac EDAC: i7core, sb_edac: Don't return NOTIFY_BAD from mce_decoder callback 2016-05-04 14:48:48 -07:00
eisa
extcon extcon: max77843: Use correct size for reading the interrupt register 2016-05-04 14:48:54 -07:00
firewire IEEE 1394 subsystem patch: 2015-11-11 10:21:34 -08:00
firmware efi: Expose non-blocking set_variable() wrapper to efivars 2016-05-04 14:48:49 -07:00
fmc
fpga fpga manager: Fix firmware resource leak on error 2015-11-24 15:25:46 -08:00
gpio gpio: revert get() to non-errorprogating behaviour 2015-12-17 15:48:29 +01:00
gpu drm/radeon: fix DP link training issue with second 4K monitor 2016-05-18 17:06:57 -07:00
hid HID: Fix boot delay for Creative SB Omni Surround 5.1 with quirk 2016-05-11 11:21:15 +02:00
hsi hsi: controllers:remove redundant code 2015-10-30 16:10:40 +01:00
hv Drivers: hv: vmbus: Fix a Host signaling bug 2016-03-03 15:07:16 -08:00
hwmon hwmon: (max1111) Return -ENODEV from max1111_read_channel if not instantiated 2016-04-20 15:41:52 +09:00
hwspinlock drivers/hwspinlock: fix race between radix tree insertion and lookup 2016-02-25 12:01:23 -08:00
hwtracing stm class: Select CONFIG_SRCU 2016-05-04 14:48:54 -07:00
i2c i2c: exynos5: Fix possible ABBA deadlock by keeping I2C clock prepared 2016-05-04 14:48:47 -07:00
ide mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM 2015-11-06 17:50:42 -08:00
idle intel_idle: prevent SKL-H boot failure when C8+C9+C10 enabled 2016-04-12 09:09:05 -07:00
iio iio: ak8975: fix maybe-uninitialized warning 2016-05-11 11:21:23 +02:00
infiniband net/mlx5e: Device's mtu field is u16 and not int 2016-05-18 17:06:36 -07:00
input Input: max8997-haptic - fix NULL pointer dereference 2016-05-18 17:06:54 -07:00
iommu iommu/dma: Restore scatterlist offsets correctly 2016-05-04 14:48:45 -07:00
ipack
irqchip irqchip/mxs: Fix error check of of_io_request_and_map() 2016-05-04 14:48:50 -07:00
isdn ser_gigaset: remove unnecessary kfree() calls from release method 2015-12-15 13:24:21 -05:00
leds spi: Updates for v4.4 2015-11-05 13:15:12 -08:00
lguest
lightnvm lightnvm: wrong offset in bad blk lun calculation 2015-12-29 08:28:32 -07:00
macintosh
mailbox mailbox: mailbox-test: avoid reading iomem twice 2015-11-04 14:03:04 +05:30
mcb mcb: Destroy IDA on module unload 2015-10-29 09:02:16 +09:00
md MD: make bio mergeable 2016-05-11 11:21:13 +02:00
media Revert "[media] videobuf2-v4l2: Verify planes array in buffer dequeueing" 2016-05-18 17:06:55 -07:00
memory fsl-ifc: add missing include on ARM64 2015-12-16 00:16:58 +01:00
memstick
message SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
mfd mfd: intel-lpss: Remove clock tree on error path 2016-05-11 11:21:10 +02:00
misc drivers/misc/ad525x_dpot: AD5274 fix RDAC read back errors 2016-05-04 14:48:52 -07:00
mmc mmc: sdhci-pci: Add support and PCI IDs for more Broxton host controllers 2016-04-20 15:42:14 +09:00
mtd mtd: nand: Drop mtd.owner requirement in nand_scan 2016-05-04 14:48:52 -07:00
net net: thunderx: avoid exposing kernel stack 2016-05-18 17:06:43 -07:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-11-10 18:11:41 -08:00
ntb NTB: fix 32-bit compiler warning 2015-11-08 16:24:43 -05:00
nubus
nvdimm libnvdimm, pfn: fix uuid validation 2016-04-20 15:41:54 +09:00
nvme NVMe: IO ending fixes on surprise removal 2015-12-22 10:12:04 -07:00
nvmem nvmem: mxs-ocotp: fix buffer overflow in read 2016-05-11 11:21:21 +02:00
of of: alloc anywhere from memblock if range not specified 2016-04-12 09:08:55 -07:00
oprofile
parisc parisc iommu: fix panic due to trying to allocate too large region 2015-12-12 16:07:25 +01:00
parport
pci PCI: Disable IO/MEM decoding for devices with non-compliant BARs 2016-04-12 09:08:37 -07:00
pcmcia pcmcia: db1xxx_ss: fix last irq_to_gpio user 2016-04-20 15:42:09 +09:00
perf arm64 updates for 4.4: 2015-11-04 14:47:13 -08:00
phy phy: core: fix wrong err handle for phy_power_on 2016-03-03 15:07:28 -08:00
pinctrl pinctrl: at91-pio4: fix pull-up/down logic 2016-05-18 17:06:47 -07:00
platform toshiba_acpi: Fix regression caused by hotkey enabling value 2016-05-04 14:48:47 -07:00
pnp
power - New Device Support 2015-11-06 10:23:50 -08:00
powercap powercap / RAPL: fix BIOS lock check 2015-12-12 02:31:11 +01:00
pps
ps3
ptp
pwm pwm: brcmstb: Fix check of devm_ioremap_resource() return code 2016-05-04 14:48:47 -07:00
rapidio
ras
regulator regulator: axp20x: Fix axp22x ldo_io voltage ranges 2016-05-18 17:06:51 -07:00
remoteproc remoteproc: fix memory leak of remoteproc ida cache layers 2015-11-26 17:44:28 +02:00
reset
rpmsg
rtc rtc: max77686: Properly handle regmap_irq_get_virq() error code 2016-05-04 14:48:52 -07:00
s390 s390/dasd: fix diag 0x250 inline assembly 2016-03-16 08:42:58 -07:00
sbus
scsi qla1280: Don't allocate 512kb of host tags 2016-05-18 17:06:52 -07:00
sfi
sh drivers: sh: Restore legacy clock domain on SuperH platforms 2016-03-09 15:34:49 -08:00
sn
soc soc: rockchip: power-domain: fix err handle while probing 2016-05-11 11:21:11 +02:00
spi spi: spi-ti-qspi: Handle truncated frames properly 2016-05-18 17:06:47 -07:00
spmi char/misc drivers for 4.4-rc1 2015-11-04 22:15:15 -08:00
ssb ssb: add Kconfig entry for compiling SoC related code 2015-10-28 21:05:21 +02:00
staging IB/security: Restrict use of the write() interface 2016-05-04 14:48:48 -07:00
target target: Fix target_release_cmd_kref shutdown comp leak 2016-04-12 09:09:02 -07:00
tc
thermal thermal: rockchip: fix a impossible condition caused by the warning 2016-05-04 14:48:54 -07:00
thunderbolt
tty serial: sh-sci: Remove cpufreq notifier to fix crash/deadlock 2016-05-04 14:48:52 -07:00
uio
usb USB: serial: cp210x: add Straizona Focusers device ids 2016-05-11 11:21:21 +02:00
uwb driver core update for 4.4-rc1 2015-11-04 21:50:37 -08:00
vfio vfio: fix ioctl error handling 2016-03-09 15:34:50 -08:00
vhost vhost: replace % with & on data path 2015-12-07 17:28:10 +02:00
video fbdev: da8xx-fb: fix videomodes of lcd panels 2016-05-04 14:48:51 -07:00
virt
virtio virtio: virtio 1.0 cs04 spec compliance for reset 2016-04-20 15:42:10 +09:00
vlynq
vme char/misc drivers for 4.4-rc1 2015-11-04 22:15:15 -08:00
w1 power supply and reset changes for the v4.4 series 2015-11-05 12:28:15 -08:00
watchdog watchdog: rc32434_wdt: fix ioctl error handling 2016-04-12 09:08:54 -07:00
xen xen/evtchn: fix ring resize when binding new events 2016-05-11 11:21:15 +02:00
zorro
Kconfig char/misc drivers for 4.4-rc1 2015-11-04 22:15:15 -08:00
Makefile null_blk: register as a LightNVM device 2015-11-16 15:22:28 -07:00