Several people have reported that they see frequent FBC related display
corruption on 965GM, so disable it for now. Users wanting to enable it can use
the driver option "Framebuffercompression" to override the default.
We need to look at "actual_brightness" rather than "brightness". The former
contains the brightness value the kernel driver has actually set, while the
latter is merely what the user requested.
Some of the hw state restoration callbacks may want to use the ring for various
things like stopping video playback, so leave the ring enabled until we get
back from RestoreHWState. Also rename the functions so that their purpose is
clearer and remove a couple of redundant lines.
This slightly reworks my last fbc patch. We don't
support tiled front buffer with XAA now, so also
disable fbc on it. If tiled alloc failed, disable
fbc too.
The PLL spreadsheet makes the precise register ranges allowed for each mode
quite clear, and shows a few inaccuracies in the b-spec. In particular, the
N register value may range from 1 to 6 instead of 3 to 8. This should close
the gap we've seen in the reachable frequencies.
This really isn't an error in general. If vblank pipe setup really fails for
some reason, it'll be obvious enough when the user tries to use vblank events
for something.
Patch from Hong Liu.
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.
When calling the video DPMS off function, make sure we zero out the current
crtc so that it will be properly re-set up next time video is turned on.
Fix from Peter Clifton with changes by Keith Packard.
In the absence of full suspend/resume support in the kernel, we have to
save/restore state in Enter/LeaveVT. For 8xx chips, 3D state may be lost
during suspend/resume, so re-emit the basic setup at EnterVT time.
Patch from Peter Clifton.
If the DPLL isn't enabled or is in VGA mode, writing the PIPEnCONF registers
may cause a hang or crash. So ensure the DPLL is in the proper state before
writing them.
Another excellent fix from Peter Clifton.
Fix a long standing bug in the framebuffer compression code (thanks to
Pierre Willenbrock!) that prevented FBC from working correctly if the front
buffer was anywhere but fence register 0.
This shows one of the reasons for the gaps: with the other settings, the VCO
is too low inside the gap. However, it also points out another issue: we
aren't using the high end of the VCO range due to some other limits being hit.
When restoring the palette, we weren't checking to make sure the
associated pipe was enabled before writing the registers. In some
configurations, this led to a driver crash. Add new routines to handle
palette save/restore and verify that the pipes are on before we touch
the registers (could easily be changed to enable/disable the pipes
around the save/restore as well).
This allows us to allocate tiled buffers in buffer objects. In the process
I removed the fence division that we had for tiled buffers on pre-965. If we
resurrect that code, it should probably be managed by just dividing all the
objects in roughly half and fencing those halves (to reduce the alignment
requirement), instead of using giant fences until we run out of space and then
trying to deal with scarce space on the last (or not) buffer. Halving
our tiled objects would use 6/8 of our fence registers on that hardware.
While this has been a desired feature for some time, to allow for reallocation
of the front buffer, it was made more necessary by the desire to avoid
requiring a NO_MOVE buffer type in TTM because buffer objects may not be left
pinned over VT switch. This is a step towards making those buffers
movable and resizable.
Jesse Barnes
Zhenyu Wang
Keith Packard
Jesse Barnes
Jesse Barnes
Jesse Barnes
Eric Anholt
Alan Coopersmith
Thomas Hellstrom
Rob
Dave Airlie
Kyle McMartin
Michel Dänzer