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262cd2e154
linux/drivers
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Ville Syrjälä 262cd2e154 drm/i915: CHV DDR DVFS support and another watermark rewrite 
Turns out the VLV/CHV system agent doesn't understand memory
latencies, so trying to rely on the PND deadline mechanism is not
going to fly especially when DDR DVFS is enabled. Currently we try to
avoid the problems by lying to the system agent about the deadlines
and setting the FIFO watermarks to 8 cachelines. This however leads to
bad memory self refresh residency.

So in order to satosfy everyone we'll just give up on the deadline
scheme and program the watermarks old school based on the worst case
memory latency.

I've modelled this a bit on the ILK+ approach where we compute multiple
sets of watermarks for each pipe (PM2,PM5,DDR DVFS) and when merge thet
appropriate one later with the watermarks from other pipes. There isn't
too much to merge actually since each pipe has a totally independent
FIFO (well apart from the mess with the partially shared DSPARB
registers), but still decopuling the pipes from each other seems like a
good idea.

Eventually we'll want to perform the watermark update in two phases
around the plane update to avoid underruns due to the single buffered
watermark registers. But that's still in limbo for ILK+ too, so I've not
gone that far yet for VLV/CHV either.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Clint Taylor <Clinton.A.Taylor@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-06-29 10:55:13 +02:00
..
accessibility
acpi Merge branches 'acpi-init' and 'acpica' 2015-05-15 00:31:23 +02:00
amba ARM: 8334/1: amba: tegra-ahb: detect and correct bogus base address 2015-04-02 10:03:55 +01:00
android
ata Merge branch 'for-4.1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2015-05-11 10:54:20 -07:00
atm
auxdisplay
base Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-04-26 17:22:07 -07:00
bcma Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-04-17 15:50:54 -04:00
block nvme: fix kernel memory corruption with short INQUIRY buffers 2015-05-13 10:22:12 -04:00
bluetooth Bluetooth: ath3k: add support of 04ca:300f AR3012 device 2015-05-13 23:04:20 +02:00
bus MIPS: Fix CDMM to use native endian MMIO reads 2015-05-26 16:46:52 +02:00
cdrom
char drm/i915/gtt: Allow >= 4GB sizes for vm. 2015-06-26 10:41:13 +02:00
clk clk: si5351: Do not pass struct clk in platform_data 2015-05-08 11:22:30 -07:00
clocksource Initial ACPI support for arm64: 2015-04-24 08:23:45 -07:00
connector
cpufreq cpufreq: intel_pstate: Fix an annoying !CONFIG_SMP warning 2015-04-15 23:02:24 +02:00
cpuidle cpuidle: Run tick_broadcast_exit() with disabled interrupts 2015-04-29 15:19:21 +02:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2015-04-26 13:51:05 -07:00
dca
devfreq
dio
dma dmaengine: increment privatecnt when using dma_get_any_slave_channel 2015-04-29 16:47:57 +05:30
dma-buf dma-buf: cleanup dma_buf_export() to make it easily extensible 2015-04-21 14:47:16 +05:30
edac
eisa
extcon extcon: usb-gpio: register extcon device before IRQ registration 2015-04-27 11:06:05 +09:00
firewire
firmware Merge branch 'dmi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging 2015-05-14 18:02:15 -07:00
fmc
gpio gpio: gpio-kempld: Fix get_direction return value 2015-05-12 13:49:13 +02:00
gpu drm/i915: CHV DDR DVFS support and another watermark rewrite 2015-06-29 10:55:13 +02:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2015-05-21 17:23:11 -07:00
hsi HSI: cmt_speech: fix error return code 2015-04-05 14:45:27 +02:00
hv Drivers: hv: hv_balloon: correctly handle num_pages>INT_MAX case 2015-04-03 16:20:12 +02:00
hwmon hwmon: (nct6683) Add missing sysfs attribute initialization 2015-05-29 17:47:42 -07:00
hwspinlock
hwtracing/coresight Char/Misc driver patches for 4.1-rc1 2015-04-21 09:42:58 -07:00
i2c Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2015-04-26 17:44:09 -07:00
ide Merge branch 'for-4.1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2015-05-11 10:54:20 -07:00
idle Power management and ACPI updates for v4.1-rc1 2015-04-14 20:21:54 -07:00
iio The usual mixed bag of fixes for IIO in the 4.1 cycle. 2015-05-13 11:51:14 -07:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2015-05-31 11:31:42 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-05-22 14:49:55 -07:00
iommu break kconfig dependency loop 2015-06-02 10:17:21 +02:00
ipack
irqchip irqchip/gicv3-its: ITS table size should not be smaller than PSZ 2015-05-20 22:13:37 +02:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2015-04-15 09:00:47 -07:00
leds This is the bulk of GPIO changes for the v4.1 development 2015-04-18 08:22:10 -04:00
lguest lguest: fix out-by-one error in address checking. 2015-05-27 09:57:21 -07:00
macintosh Merge branch 'next-remove-ldst' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc into next 2015-04-07 13:25:14 +10:00
mailbox
mcb mcb: request_mem_region() returns NULL on error 2015-04-03 16:15:30 +02:00
md Quite a few fixes for DM's blk-mq support thanks to extra DM multipath 2015-05-29 14:39:24 -07:00
media break kconfig dependency loop 2015-06-02 10:17:21 +02:00
memory ARM: SoC driver updates for v4.1 2015-04-22 09:18:17 -07:00
memstick memstick: mspro_block: add missing curly braces 2015-04-17 09:04:09 -04:00
message
mfd mfd: da9052: Fix broken regulator probe 2015-05-27 13:34:15 +01:00
misc Char/Misc driver patches for 4.1-rc1 2015-04-21 09:42:58 -07:00
mmc mmc: atmel-mci: fix bad variable type for clkdiv 2015-05-18 09:04:42 +02:00
mtd Two MTD fixes for 4.1: 2015-05-18 10:01:54 -07:00
net ** NOW WITH TESTING! ** 2015-05-29 11:24:28 -07:00
nfc NFC: logging neatening 2015-04-07 12:05:12 +02:00
ntb
nubus
of of: add EXPORT_SYMBOL for of_graph_get_endpoint_by_regs 2015-06-23 10:19:10 +10:00
oprofile Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-04-26 17:22:07 -07:00
parisc parisc: %pf is only for function pointers 2015-04-24 13:45:54 +02:00
parport
pci xen: features and fixes for 4.1-rc0 2015-04-16 14:01:03 -05:00
pcmcia ARM: SoC cleanups for v4.1 2015-04-22 09:04:39 -07:00
phy USB patches for 4.1-rc1 2015-04-13 17:07:21 -07:00
pinctrl pinctrl: Fix gpio/pin mapping for Meson8b 2015-05-19 11:40:52 +02:00
platform thinkpad_acpi: Revert unintentional device attribute renaming 2015-05-20 02:18:12 -07:00
pnp Power management and ACPI updates for v4.1-rc1 2015-04-14 20:21:54 -07:00
power power: bq27x00_battery: Add missing MODULE_ALIAS 2015-05-01 23:01:48 +02:00
powercap powercap / RAPL: Add support for Intel Skylake processors 2015-04-15 23:06:16 +02:00
pps
ps3
ptp
pwm pwm: img: Impose upper and lower timebase steps value 2015-05-19 16:07:40 +02:00
rapidio
ras
regulator mfd: da9052: Fix broken regulator probe 2015-05-27 13:34:15 +01:00
remoteproc
reset
rpmsg
rtc drivers/rtc/rtc-armada38x.c: remove unused local `flags' 2015-05-14 17:55:51 -07:00
s390 s390/zcrypt: Fix invalid domain handling during ap module unload 2015-05-13 09:57:29 +02:00
sbus drivers/sbus/char/envctrl.c: ignore orderly_poweroff return value 2015-04-15 16:35:23 -07:00
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2015-05-31 11:31:42 -07:00
sfi
sh drivers: sh: Remove test for now unsupported sh7372 2015-04-27 13:08:14 +09:00
sn
soc - fix unused variable warning for pmic-wrapper 2015-04-14 00:43:28 +02:00
spi Merge remote-tracking branches 'spi/fix/fsl-cpm', 'spi/fix/fsl-dspi' and 'spi/fix/fsl-espi' into spi-linus 2015-05-11 17:29:49 +01:00
spmi spmi: pmic_arb: remove ARM build time dependency 2015-04-03 16:15:30 +02:00
ssb ssb: extend fix for PCI related silent reboots to all chipsets 2015-05-20 16:36:06 +03:00
staging Staging / IIO driver fixes for 4.1-rc4 2015-05-16 21:04:56 -07:00
target target: Use a PASSTHROUGH flag instead of transport_types 2015-05-30 19:58:11 -07:00
tc
thermal Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal into for-rc 2015-05-19 08:12:27 +08:00
thunderbolt
tty ttyFDC: Fix to use native endian MMIO reads 2015-05-26 16:46:52 +02:00
uio Revert "uio: constify of_device_id array" 2015-04-03 16:04:21 +02:00
usb USB-serial fixes for v4.1-rc4 2015-05-14 12:43:36 -07:00
uwb
vfio vfio: Fix runaway interruptible timeout 2015-05-01 16:31:41 -06:00
vhost target: Fix se_tpg_tfo->tf_subsys regression + remove tf_subsystem 2015-05-30 18:04:20 -07:00
video backlight: pwm: Handle EPROBE_DEFER while requesting the PWM 2015-05-26 08:44:59 +01:00
virt
virtio virtio: drop virtio_device_is_legacy_only 2015-04-15 12:41:14 +09:30
vlynq
vme
w1
watchdog Merge git://www.linux-watchdog.org/linux-watchdog 2015-04-22 11:22:55 -07:00
xen xen/events: don't bind non-percpu VIRQs with percpu chip 2015-05-19 19:55:36 +01:00
zorro
Kconfig
Makefile coresight: moving to new "hwtracing" directory 2015-04-03 16:17:04 +02:00