Ville Syrjälä 7bed8adcd9 drm/i915: Try to sanitize bogus DPLL state left over by broken SNB BIOSen ... Certain SNB machines (eg. ASUS K53SV) seem to have a broken BIOS which misprograms the hardware badly when encountering a suitably high resolution display. The programmed pipe timings are somewhat bonkers and the DPLL is totally misprogrammed (P divider == 0). That will result in atomic commit timeouts as apparently the pipe is sufficiently stuck to not signal vblank interrupts. IIRC something like this was also observed on some other SNB machine years ago (might have been a Dell XPS 8300) but a BIOS update cured it. Sadly looks like this was never fixed for the ASUS K53SV as the latest BIOS (K53SV.320 11/11/2011) is still broken. The quickest way to deal with this seems to be to shut down the pipe+ports+DPLL. Unfortunately doing this during the normal sanitization phase isn't quite soon enough as we already spew several WARNs about the bogus hardware state. But it's better than hanging the boot for a few dozen seconds. Since this is limited to a few old machines it doesn't seem entirely worthwile to try and rework the readout+sanitization code to handle it more gracefully. v2: Fix potential NULL deref (kbuild test robot) Constify has_bogus_dpll_config() Cc: stable@vger.kernel.org # v4.20+ Cc: Daniel Kamil Kozar <dkk089@gmail.com> Reported-by: Daniel Kamil Kozar <dkk089@gmail.com> Tested-by: Daniel Kamil Kozar <dkk089@gmail.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109245 Fixes: 516a49cc19 ("drm/i915: Fix assert_plane() warning on bootup with external display") Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190111174950.10681-1-ville.syrjala@linux.intel.com Reviewed-by: Mika Kahola <mika.kahola@intel.com>		2019-01-28 15:53:32 +02:00
..
accessibility
acpi	ACPI / PMIC: Add generic intel_soc_pmic_exec_mipi_pmic_seq_element handling	2019-01-09 10:35:03 +01:00
amba
android	binder: implement binderfs	2018-12-19 09:40:13 +01:00
ata	for-4.21/libata-20190102	2019-01-02 18:47:56 -08:00
atm
auxdisplay	auxdisplay: charlcd: fix x/y command parsing	2018-12-21 21:27:21 +01:00
base	Merge branch 'mount.part1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-01-05 13:25:58 -08:00
bcma
block	block: sunvdc: don't run hw queue synchronously from irq context	2019-01-03 08:21:47 -07:00
bluetooth	Bluetooth: hci_bcm: Handle specific unknown packets after firmware loading	2018-12-19 13:43:42 +01:00
bus	ARM: SoC driver updates	2018-12-31 17:32:35 -08:00
cdrom	gdrom: fix a memory leak bug	2018-12-29 08:20:44 -07:00
char	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
clk	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2019-01-02 18:56:59 -08:00
clocksource	arch/csky patches for 4.21-rc1	2019-01-05 09:50:07 -08:00
connector
cpufreq	powerpc updates for 4.21	2018-12-27 10:43:24 -08:00
cpuidle	powerpc updates for 4.21	2018-12-27 10:43:24 -08:00
crypto	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
dax	mm, devm_memremap_pages: fix shutdown handling	2018-12-28 12:11:47 -08:00
dca
devfreq
dio
dma	Merge branch 'next/drivers' into next/late	2019-01-04 14:31:38 -08:00
dma-buf	drm-misc-next for 5.1:	2019-01-10 05:58:52 +10:00
edac	EDAC, fsl_ddr: Add LS1021A to the list of supported hardware	2018-12-19 11:57:45 +01:00
eisa
extcon
firewire	FireWire (IEEE 1394) subsystem patch:	2019-01-05 18:33:21 -08:00
firmware	arm64 fixes for -rc1	2019-01-05 11:28:39 -08:00
fmc
fpga	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
fsi
gnss
gpio	This is the bulk of GPIO changes for the v4.21 kernel series:	2018-12-28 20:00:21 -08:00
gpu	drm/i915: Try to sanitize bogus DPLL state left over by broken SNB BIOSen	2019-01-28 15:53:32 +02:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid	2019-01-05 17:53:40 -08:00
hsi
hv	Char/Misc driver patches for 4.21-rc1	2018-12-28 20:54:57 -08:00
hwmon	Kconfig updates for v4.21	2018-12-29 13:03:29 -08:00
hwspinlock	hwspinlock: fix return value check in stm32_hwspinlock_probe()	2019-01-03 11:42:10 -08:00
hwtracing	intel_th: msu: Fix an off-by-one in attribute store	2018-12-19 20:21:06 +01:00
i2c	Merge branch 'i2c/for-5.0' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2019-01-05 18:13:35 -08:00
i3c
ide	for-4.21/block-20181221	2018-12-28 13:19:59 -08:00
idle
iio	Staging/IIO driver patches for 4.21-rc1	2018-12-28 20:39:58 -08:00
infiniband	4.21 merge window 2nd pull request	2019-01-05 18:20:51 -08:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2019-01-02 18:56:59 -08:00
iommu	IOMMU Updates for Linux v4.21	2019-01-01 15:55:29 -08:00
ipack
irqchip	Xtensa updates for v4.21:	2018-12-29 09:40:40 -08:00
isdn	isdn: fix kernel-infoleak in capi_unlocked_ioctl	2019-01-02 10:31:39 -08:00
leds	LEDs for 4.21-rc1	2018-12-25 14:52:50 -08:00
lightnvm	lightnvm: pblk: fix use-after-free bug	2018-12-22 14:45:35 -07:00
macintosh	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
mailbox	mailbox: tegra-hsp: Use device-managed registration API	2018-12-21 22:31:26 -06:00
mcb
md	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md into for-linus	2019-01-03 08:21:02 -07:00
media	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
memory	ARM: SoC: late updates	2019-01-05 11:30:37 -08:00
memstick	MMC core:	2018-12-28 16:52:18 -08:00
message	scsi: flip the default on use_clustering	2018-12-18 23:13:12 -05:00
mfd
misc	Merge branch 'i2c/for-5.0' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2019-01-05 18:13:35 -08:00
mmc	MMC core:	2018-12-28 16:52:18 -08:00
mtd	Kbuild updates for v4.21	2018-12-29 12:03:17 -08:00
mux
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-01-03 12:53:47 -08:00
nfc
ntb
nubus
nvdimm	Merge branch 'akpm' (patches from Andrew)	2018-12-28 16:55:46 -08:00
nvme	nvme-pci: trace SQ status on completions	2018-12-19 08:35:36 +01:00
nvmem
of	Merge tag 'devicetree-for-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux	2018-12-28 20:08:34 -08:00
opp
oprofile
parisc	Kconfig file consolidation for v4.21	2018-12-29 13:40:29 -08:00
parport
pci	pci-v4.21-changes	2019-01-05 17:57:34 -08:00
pcmcia	Included in this update:	2019-01-05 11:23:17 -08:00
perf	drivers/perf: hisi: Fixup one DDRC PMU register offset	2019-01-04 10:13:27 +00:00
phy
pinctrl	Pin control bulk changes for the v4.21 kernel cycle:	2019-01-01 13:19:16 -08:00
platform	chrome platform changes for v4.21	2019-01-06 11:40:06 -08:00
pnp	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
power	power supply and reset changes for the v4.21 series	2018-12-28 20:22:45 -08:00
powercap
pps	Kconfig updates for v4.21	2018-12-29 13:03:29 -08:00
ps3
ptp	Char/Misc driver patches for 4.21-rc1	2018-12-28 20:54:57 -08:00
pwm	pwm: imx: Add ipg clock operation	2018-12-24 12:06:56 +01:00
rapidio
ras	treewide: surround Kconfig file paths with double quotes	2018-12-22 00:25:54 +09:00
regulator	Merge remote-tracking branch 'regulator/topic/coupled' into regulator-next	2018-12-21 13:43:35 +00:00
remoteproc
reset
rpmsg
rtc	RTC for 4.21	2019-01-01 13:24:31 -08:00
s390	s390 updates for the 4.21 merge window	2019-01-02 18:37:01 -08:00
sbus	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next	2018-12-26 10:32:18 -08:00
scsi	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
sfi
sh
siox
slimbus
sn
soc	ARM: SoC driver updates	2018-12-31 17:32:35 -08:00
soundwire
spi	spi: Updates for v4.21	2018-12-25 14:43:54 -08:00
spmi
ssb
staging	staging/vboxvideo: Don't set FBINFO_MISC_ALWAYS_SETPAR	2019-01-15 16:14:47 +01:00
target	SCSI misc on 20181224	2018-12-28 14:48:06 -08:00
tc
tee	OP-TEE dynamic shm log message	2018-12-31 13:06:30 -08:00
thermal	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	2019-01-05 16:07:28 -08:00
thunderbolt
tty	ARM: SoC: late updates	2019-01-05 11:30:37 -08:00
uio	Char/Misc driver patches for 4.21-rc1	2018-12-28 20:54:57 -08:00
usb	pci-v4.21-changes	2019-01-05 17:57:34 -08:00
uwb
vfio	IOMMU Updates for Linux v4.21	2019-01-01 15:55:29 -08:00
vhost	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
video	fbdev changes for v4.21:	2019-01-05 18:15:37 -08:00
virt
virtio	virtio, vhost: features, fixes, cleanups	2019-01-02 18:54:45 -08:00
visorbus
vlynq
vme
w1	treewide: surround Kconfig file paths with double quotes	2018-12-22 00:25:54 +09:00
watchdog	linux-watchdog 4.21-rc1 tag	2019-01-01 13:16:45 -08:00
xen	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
zorro
Kconfig	Kconfig file consolidation for v4.21	2018-12-29 13:40:29 -08:00
Makefile