It looks like the desktop variants of i915 and i945 also have the DCC register to control dram channel interleave and cpu side bit6 swizzling. Unfortunately internal Cspec/ConfigDB documentation for these ancient chips have already been dropped and there seem to be no archives. Also somebody thought the swizzling behaviour is surely a worthy secret to keep and redacted any mention of these fields from the published Intel datasheets. I suspect the hw engineers were really proud of the page coloring they've achieved in their first dual channel dram controller with bit17 - after all Bspec explains in great length the optimal layout of page frame numbers modulo 4 for the color and depth buffers, too. Later on when they've started to work on VT-d they shamefully discoverd their stupidity and tried to cover the tracks ... Tested-by: Daniel Vetter <daniel.vetter@ffwll.ch> (i915g) Tested-by: Pavel Ondračka <pavel.ondracka@email.cz> (i945g) Tested-by: Chris Wilson <chris@chris-wilson.co.uk> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=42625 Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch> |
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accessibility | ||
acpi | ||
amba | ||
ata | ||
atm | ||
auxdisplay | ||
base | ||
bcma | ||
block | ||
bluetooth | ||
cdrom | ||
char | ||
clk | ||
clocksource | ||
connector | ||
cpufreq | ||
cpuidle | ||
crypto | ||
dca | ||
devfreq | ||
dio | ||
dma | ||
edac | ||
eisa | ||
firewire | ||
firmware | ||
gpio | ||
gpu | ||
hid | ||
hv | ||
hwmon | ||
hwspinlock | ||
i2c | ||
ide | ||
idle | ||
ieee802154 | ||
infiniband | ||
input | ||
iommu | ||
isdn | ||
leds | ||
lguest | ||
macintosh | ||
mca | ||
md | ||
media | ||
memstick | ||
message | ||
mfd | ||
misc | ||
mmc | ||
mtd | ||
net | ||
nfc | ||
nubus | ||
of | ||
oprofile | ||
parisc | ||
parport | ||
pci | ||
pcmcia | ||
pinctrl | ||
platform | ||
pnp | ||
power | ||
pps | ||
ps3 | ||
ptp | ||
rapidio | ||
regulator | ||
rtc | ||
s390 | ||
sbus | ||
scsi | ||
sfi | ||
sh | ||
sn | ||
spi | ||
ssb | ||
staging | ||
target | ||
tc | ||
telephony | ||
thermal | ||
tty | ||
uio | ||
usb | ||
uwb | ||
vhost | ||
video | ||
virt | ||
virtio | ||
vlynq | ||
w1 | ||
watchdog | ||
xen | ||
zorro | ||
Kconfig | ||
Makefile |