On some platforms, the firmware may read & write GPU registers on lid close,
suspend/resume time or during various SMM events. If one of the graphics pipes
is disabled at that time, the GPU may hang due to the programming dependencies
of the various registers.
This patch adds a quirk to force the driver to keep pipe A enabled if
necessary, through user configuration in xorg.conf or via a platform specific
quirk. Leaving the pipe enabled comes at a power cost however, so the quirk
should only be enabled when strictly necessary.
Fixes https://bugs.freedesktop.org/show_bug.cgi?id=11432.
This commit fixes backlight support for several platforms.
Except on recent machines supporting the IGD OpRegion specification,
backlight control is rather platform specific. In some cases, we can
program the native backlight control regsiters directly without any
trouble. On others, we need to use the legacy backlight control
register. On still others, we need a combination of the two. And on
some platforms, none of the above will work, so we go through the
kernel backlight interface, which provides a platform specific driver
for backlight control.
This is a step towards being able to expose buffer objects through the screen
private to DRI clients, instead of having them have to use the fake buffer
object type.
This fails in two ways. First, the kernel memory manager is not currently
suitable for doing the physical allocations we need, so we still use AGP for
those. Additionally, the DRI lock can't be initialized early enough for us, so
these buffer object allocations fail. This will be fixed by improving the
DRM interface.
It had been necessary to allow more than a small amount of memory to be
allocated, but now those old small allocations people had configured are
getting in the way.
With the fixes to the 2D frame buffer allocation that allows up to 65536
lines of 2D frame buffer in XAA mode, the old linear allocation hacks are no
longer necessary.
Driver installs as intel_drv.so with symlink to i810_drv.so to ensure
existing configurations continue to work. Updated manual page to reflect
name change and add attributions for recent work.
Jesse Barnes
Jesse Barnes
Eric Anholt
Jesse Barnes
Brice Goglin
Jesse Barnes
Keith Packard
Wang Zhenyu
Alan Coopersmith
Michel Dänzer