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OpenCloudOS-Kernel
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Imre Deak c6782b76d3 drm/i915/gen9: Reset secondary power well requests left on by DMC/KVMR 
DMC forces on power well 1 and the misc IO power well by setting the
corresponding request bits both in the BIOS and the DEBUG power well
request registers. This is somewhat unexpected since the firmware should
really just save and restore state but not alter it. We also depend on
being able to disable power well 1, and the misc IO power well before
entering S3/S4 on BXT and SKL or entering DC9 on BXT. To fix this make
sure these request bits are cleared whenever we want to disable the
given power wells.

On SKL there is another twist where the firmware also clears the power
well 1 request bit in HSW_POWER_WELL_DRIVER (but not that of the misc IO
power well). This happens to not cause a problem due to the forced-on
request bits in the other request registers.

I've filed a bug about all this, but fixing that may take a while and
having this sanity check in place makes sense even for future firmware
versions.

At the same time also check the KVMR request bits. I haven't seen this
being altered, but we don't expect any request bits in here either, so
sanitize this register as well.

v2:
- Apply the workaround on SKL as well. I noticed the related failure
  from the CI report, later Patrik also reported seeing it on his
  machine.

CC: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459851965-6137-1-git-send-email-imre.deak@intel.com
 		2016-04-15 14:44:54 +03:00
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accessibility
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acpi Merge branch 'acpi-processor' 2016-04-02 01:17:36 +02:00
amba
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android
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ata Merge branch 'for-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2016-03-18 20:06:46 -07:00
atm Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2016-03-17 21:38:27 -07:00
auxdisplay
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base PM / wakeirq: fix wakeirq setting after wakup re-configuration from sysfs 2016-04-07 22:23:47 +02:00
bcma
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block Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2016-04-07 16:34:26 -07:00
bluetooth Bluetooth: btmrvl_sdio: fix firmware activation failure 2016-03-10 19:51:29 +01:00
bus arm[64] perf updates for 4.6: 2016-03-21 13:14:16 -07:00
cdrom
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char Revert "ppdev: use new parport device model" 2016-03-25 09:02:13 -07:00
clk clk: qcom: ipq4019: add some fixed clocks for ddrppl and fepll 2016-03-29 16:31:16 -07:00
clocksource Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-24 10:32:42 -07:00
connector
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cpufreq Merge branches 'pm-cpufreq', 'pm-cpuidle' and 'acpi-cppc' 2016-04-08 21:46:05 +02:00
cpuidle cpuidle: menu: Fall back to polling if next timer event is near 2016-03-21 15:50:28 +01:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-03-23 06:12:39 -07:00
dca
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devfreq PM / devfreq: Spelling s/frequnecy/frequency/ 2016-03-17 02:30:16 +01:00
dio
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dma asm-generic changes for 4.6 2016-03-24 23:13:48 -07:00
dma-buf dma-buf: Update docs for SYNC ioctl 2016-03-21 09:26:45 +01:00
edac EDAC queue for 4.6 2016-03-16 08:36:55 -07:00
eisa
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extcon
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firewire IEEE 1394 subsystem patch: 2016-03-25 08:52:25 -07:00
firmware firmware: qemu_fw_cfg.c: hold ACPI global lock during device access 2016-04-07 15:16:40 +03:00
fmc
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fpga
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gpio gpio: pca953x: Use correct u16 value for register word write 2016-04-08 11:49:47 +02:00
gpu drm/i915/gen9: Reset secondary power well requests left on by DMC/KVMR 2016-04-15 14:44:54 +03:00
hid drivers/hid/uhid.c: check write() bitness using in_compat_syscall 2016-03-22 15:36:02 -07:00
hsi
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hv Char/Misc patches for 4.6-rc1 2016-03-17 13:47:50 -07:00
hwmon hwmon: (max1111) Return -ENODEV from max1111_read_channel if not instantiated 2016-03-27 10:37:48 -07:00
hwspinlock
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hwtracing
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i2c i2c: jz4780: really prevent potential division by zero 2016-04-09 08:36:44 +02:00
ide ide: palm_bk3710: test clock rate to avoid division by 0 2016-03-20 16:59:27 -04:00
idle intel_idle: Add KBL support 2016-04-07 22:11:08 +02:00
iio Second set of IIO fixes for the 4.6 cycle. 2016-04-04 13:45:10 -07:00
infiniband Revert "ib_srpt: Convert to percpu_ida tag allocation" 2016-04-07 18:16:20 -07:00
input Merge branch 'akpm' (patches from Andrew) 2016-03-25 16:59:11 -07:00
iommu iommu/vt-d: Silence an uninitialized variable warning 2016-04-07 14:51:47 +02:00
ipack
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irqchip irqchip/mbigen: Make CONFIG_HISILICON_IRQ_MBIGEN a hidden option 2016-03-23 12:02:29 +01:00
isdn Drivers: isdn: hisax: isac.c: Fix assignment and check into one expression. 2016-03-27 22:38:12 -04:00
leds platform-drivers-x86 for 4.6-1 2016-03-23 17:20:59 -07:00
lguest
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lightnvm lightnvm: do not load L2P table if not supported 2016-03-18 18:10:38 -07:00
macintosh
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mailbox Merge branches 'pm-cpufreq', 'pm-cpuidle' and 'acpi-cppc' 2016-04-08 21:46:05 +02:00
mcb
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md Merge tag 'md/4.6-rc2-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2016-04-09 11:23:27 -07:00
media media fixes for v4.6-rc2 2016-04-05 06:47:50 -07:00
memory MTD updates for v4.6 2016-03-24 19:57:15 -07:00
memstick drivers/memstick/host/r592.c: avoid gcc-6 warning 2016-03-25 16:37:42 -07:00
message
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mfd - New Drivers 2016-03-18 10:15:11 -07:00
misc mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
mmc MMC host: 2016-04-10 17:38:55 -07:00
mtd mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
net tuntap: restore default qdisc 2016-04-08 15:52:45 -04:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-03-19 10:05:34 -07:00
ntb NTB: Remove _addr functions from ntb_hw_amd 2016-03-26 11:44:33 -04:00
nubus
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nvdimm Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm 2016-04-09 14:05:45 -07:00
nvme nvme: avoid cqe corruption when update at the same time as read 2016-03-22 10:27:29 -06:00
nvmem
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of DeviceTree updates for 4.6: 2016-03-19 15:15:07 -07:00
oprofile mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
parisc PCI changes for the v4.6 merge window: 2016-03-16 14:45:55 -07:00
parport
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pci Revert "PCI: dra7xx: Mark driver as broken" 2016-03-22 07:50:11 -05:00
pcmcia pcmcia: db1xxx_ss: fix last irq_to_gpio user 2016-03-29 22:48:53 +02:00
perf drivers/perf: arm_pmu: avoid NULL dereference when not using devicetree 2016-03-21 11:36:17 +00:00
phy
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pinctrl Revert "Revert "pinctrl: lantiq: Implement gpio_chip.to_irq"" 2016-04-01 15:21:27 +02:00
platform Convert straggling drivers to new six-argument get_user_pages() 2016-04-02 18:35:05 -05:00
pnp PNP / ACPI: add ACPI_RESOURCE_TYPE_SERIAL_BUS as a valid type 2016-03-09 23:50:55 +01:00
power Power management and ACPI material for v4.6-rc1, part 2 2016-03-25 16:55:37 -07:00
powercap powercap: intel_rapl: Add missing Haswell model 2016-04-05 03:44:48 +02:00
pps
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ps3
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ptp Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 12:13:56 -07:00
pwm pwm: omap-dmtimer: Add debug message for effective period and duty cycle 2016-03-23 17:11:48 +01:00
rapidio Convert straggling drivers to new six-argument get_user_pages() 2016-04-02 18:35:05 -05:00
ras
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regulator - New Drivers 2016-03-18 10:15:11 -07:00
remoteproc remoteproc: st: fix check of syscon_regmap_lookup_by_phandle() return value 2016-03-28 16:19:00 -07:00
reset
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rpmsg
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rtc RTC for 4.6 #2 2016-03-24 22:49:08 -07:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2016-04-01 07:15:54 -05:00
sbus
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scsi SCSI fixes on 20160408 2016-04-09 12:00:42 -07:00
sfi
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sh
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sn
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soc ARM: SoC driver updates for v4.6 2016-03-20 15:40:32 -07:00
spi Merge remote-tracking branches 'spi/fix/omap2' and 'spi/fix/rockchip' into spi-linus 2016-04-04 10:05:49 -07:00
spmi
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ssb
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staging Staging / IIO driver fixes for 4.6-rc3 2016-04-09 12:09:37 -07:00
target target: add a new add_wwn_groups fabrics method 2016-03-30 20:06:44 -07:00
tc
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thermal Thermal: Ignore invalid trip points 2016-03-18 14:10:57 +08:00
thunderbolt
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tty tty: Fix merge of "tty: Refactor tty_open()" 2016-03-31 20:49:39 -07:00
uio
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usb USB fixes for 4.6-rc3 2016-04-09 12:23:02 -07:00
uwb
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vfio VFIO updates for v4.6-rc1 2016-03-17 13:05:09 -07:00
vhost Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2016-03-22 12:41:14 -07:00
video mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
virt
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virtio virtio: virtio 1.0 cs04 spec compliance for reset 2016-04-07 15:16:39 +03:00
vlynq
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vme
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w1
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watchdog hpwdt: use nmi_panic() when kernel panics in NMI handler 2016-03-22 15:36:02 -07:00
xen xen/events: Mask a moving irq 2016-04-04 11:18:00 +01:00
zorro
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Kconfig
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Makefile
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