drm/nouveau/nouveau: bios pointers may be unaligned, use proper accessors

This can show up on SPARC or other architectures that don't handle
unaligned accesses. The kernel normally fixes these up, but it shouldn't
have to.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96836
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nv04/disp: hide all the cruft away in its own little hole

It'd be pretty awesome if someone would care enough to port this all
properly to a class interface, perhaps submitting a command stream to
the core via a sw object on PFIFO (emulating how EVO works basically,
and also what nvidia have done forever..)..

But, this seems unlikely given how old this hardware is now, so, lets
just hide it away.

There's a heap of other bits and pieces laying around that are still
tangled. I'll (re)move them in pieces.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: remove some more unnecessary legacy bios code

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/dp: remove last bits of VBIOS parsing from DRM code

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: remove (now obsolete) BIT U table parsing from DRM code

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: port remainder of drm code, and rip out compat layer

v2: Ben Skeggs <bskeggs@redhat.com>
- fill in nouveau_pm.dev to prevent oops
- fix ppc issues (build + OF shadow)

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/mxm: split up into bios code and a subdev module

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: implement devinit subdev, and new init table parser

v2:
- make sure not to execute display scripts unless resuming

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/clock: pull in the implementation from all over the place

Still missing the main bits we use to change performance levels, I'll get
to it after all the hard yakka has been finished.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/i2c: port to subdev interfaces

v2/v3: Ben Skeggs <bskeggs@redhat.com>
- fix typo in default bus selection
- fix accidental loss of destructor

v4: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com>
- fix typo causing incorrect default i2c port settings when no BMP data

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/gpio: port gpio to subdev interfaces

v2: Ben Skeggs <bskeggs@redhat.com>
- rebase on top of v3.6-rc6 with gpio reset patch integrated already

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: restructure source tree, split core from drm implementation

Future work will be headed in the way of separating the policy supplied by
the nouveau drm module from the mechanisms provided by the driver core.

There will be a couple of major classes (subdev, engine) of driver modules
that have clearly defined tasks, and the further directory structure change
is to reflect this.

No code changes here whatsoever, aside from fixing up a couple of include
file pathnames.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: add bios connector type for dms59

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/bios: rework vbios shadowing

Refactored to allow shadowing of VBIOS images longer than 64KiB, which
allows us to pass the VBIOS checksum test on certain boards.

There's also a workaround for reading the PROM VBIOS on some chipsets.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: recognise DCB connector type for DP+DVI+VGA DMS-59

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/disp: check that panel power gpio is enabled at init time

Reported-by: Yuriy Khomchik <homyur@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/gpio: reimplement as nouveau_gpio.c, fixing a number of issues

- moves out of nouveau_bios.c and demagics the logical state definitions
- simplifies chipset-specific driver interface
- makes most of gpio irq handling common, will use for nv4x hpd later
- api extended to allow both direct gpio access, and access using the
logical function states
- api extended to allow for future use of gpio extender chips
- pre-nv50 was handled very badly, the main issue being that all GPIOs
were being treated as output-only.
- fixes nvd0 so gpio changes actually stick, magic reg needs bashing

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/mxm: initial implementation of dcb sanitisation

The DCB table provided by the VBIOS on most MXM chips has a number of
entries which either need to be disabled, or modified according to the
MXM-SIS Output Device Descriptors.

The x86 vbios code usually takes care of this for us, however, with the
large number of laptops now with switchable graphics or optimus, a lot
of the time nouveau is responsible for POSTing the card instead - leaving
some fun situations like, plugging in a monitor and having nouveau decide
3 connectors actually just got plugged in..

No MXM-SIS fetching methods implemented yet.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/disp: parse connector info directly in nouveau_connector.c

Another case where we parsed vbios data to some structs, then again use
that info once to construct another set of data. Skip the intermediate
step.

This is also slightly improved in that we can now use DCB 3.x connector
table info, which will allow NV4x to gain hotplug support, and to make
quirks for SPWG LVDS panels unnecessary.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/i2c: do parsing of i2c-related vbios info in nouveau_i2c.c

Not much point parsing the vbios data into a struct which is only used once
to parse the data into another struct, go directly from vbios to
nouveau_i2c_chan.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/bios: start refactoring dcb routines

This primary reason for this was mostly to avoid duplication of some of
this stuff by the MXM-SIS parser. However, some other cleanups will also
follow this as a result.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/bios: pass drm_device to ROMPTR, rather than nvbios

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nv50/pm: s/PLL_UNK05/PLL_VDEC/

Following to "drm/nv50/pm: s/unk05/vdec/", let's rename the PLL to PLL_VDEC

PLL names are purely indicative and are based on the most important engine
it clocks.

Signed-off-by: Martin Peres <martin.peres@labri.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/gpio: remove invert flag, use state[] everywhere

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/pm: manual pwm fanspeed management for nv40+ boards

Exposes the following sysfs entries:
- fan0_input: read the rotational speed of the fan (poll a bit during 250ms)
- pwm0: set the pwm duty cycle
- pwm0_min/max: set the minimum/maximum pwm value

v2 (Ben Skeggs):
- nv50 pwm controller code removed in favour of other more complete code
- FAN_RPM -> FAN_SENSE
- merged FAN_SENSE readout into common code, not at all nv50-specific
- protected fanspeed changes with perflvl_wr
- formatting tidying
- added some comments where things are shaky

v3 (Martin Peres)
- ensure duty min/max from thermal table are sane

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Martin Peres <martin.peres@ensi-bourges.fr>

drm/nouveau/dp: return master dp table pointer too when looking up encoder

Will need to be able to distinguish 2.0/2.1 from 3.0 soon. Also, move
the vbios parsing to nouveau_dp where it belongs.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau/bios: allow passing in crtc to the init table parser

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: recognise DCB connector type 0x41 as LVDS

After looking at a number of different logs, it appears 0x41 likely
indicates the presense of an LVDS panel following the SPWG spec
(http://www.spwg.org/)

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: make vbios parser runnable from an atomic context

The nv50 display isr bh needs to be converted to a tasklet, which means
we can't sleep anymore. The places we execute vbios init tables are
rare, and not in any way performance critical, so this isn't a huge
problem.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: make bios code easier to use externally

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: make the behaviour of get_pll_limits() consistent

This replaces all the pll_types definitions for ones that match the types
used in the tables in recent VBIOS versions.

get_pll_limits() will now accept either type or register value as input
across all limits table versions, and will store the actual register ID
that a PLL type refers to in the returned structure.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nv50: add dcb type 14 to enum to prevent compiler complaint

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nv17-nv4x: Attempt to init some external TMDS transmitters.

sil164 and friends are the most common, usually they just need to be
poked once because a fixed configuration is enough for any modes and
clocks, so they worked without this patch if the BIOS had done a good
job on POST. Display couldn't survive a suspend/resume cycle though.
Unfortunately, BIOS scripts are useless here.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nv04-nv3x: Implement init-compute-mem.

Init-compute-mem was the last piece missing for nv0x-nv3x card
cold-booting. This implementation is somewhat lacking but it's been
reported to work on most chipsets it was tested in. Let me know if it
breaks suspend to RAM for you.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Tested-by: Patrice Mandin <patmandin@gmail.com>
Tested-by: Ben Skeggs <bskeggs@redhat.com>
Tested-by: Xavier Chantry <chantry.xavier@gmail.com>
Tested-by: Marcin Kościelnicki <koriakin@0x04.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: support fetching LVDS EDID from ACPI

Based on a patch from Matthew Garrett.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Acked-by: Matthew Garrett <mjg@redhat.com>

drm/nouveau: tidy connector/encoder creation a little

Create connectors before encoders to avoid having to do another loop across
encoder list whenever we create a new connector. This allows us to pass
the connector to the encoder creation functions, and avoid using a
create_resources() callback since we can now call it directly.

This can also potentially modify the connector ordering on nv50. On cards
where the DCB connector and encoder tables are in the same order, things
will be unchanged. However, there's some cards where the ordering between
the tables differ, and in one case, leads us to naming the connectors
"wrongly".

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nv50: store full dcb i2c entry from vbios

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nv50: parse/use some more de-magiced parts of gpio table entries

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: store raw gpio table entry in bios gpio structs

And use our own version of the GPIO table for the INIT_GPIO opcode.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nv40: rework lvds table parsing

All indications seem to be that the version 0x30 table should be handled
the same way as 0x40 (as used on G80), at least for the parts that we
currently try use.

This commit cleans up the parsing to make it clearer about what we're
actually trying to achieve, and unifies the 0x30/0x40 parsing.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nv50: fix connector table parsing for some cards

The connector table index in the DCB entry for each output type is an
index into the connector table, and does *not* necessarily match up
with what was previously called "index" in the connector table entries
themselves.

Not real sure what that index is exactly, renamed to "index2" as we
still use it to prevent creating multiple TV connectors.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: check for known dcb connector types

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: reorganise bios header, add dcb connector type enums

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: merge nvbios and nouveau_bios_info

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: merge parsed_dcb and bios_parsed_dcb into dcb_table

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: rename parsed_dcb_gpio to dcb_gpio_table

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: use mutex for vbios lock

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nv50: prevent multiple init tables being parsed at the same time

With DVI and DP plugged, the DVI clock change interrupts being run can
cause DP link training to fail. This adds a spinlock around init table
parsing to prevent this.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: Kill global state in BIOS script interpreter

Signed-off-by: Marcin Kościelnicki <koriakin@0x04.net>
Signed-off-by: Maarten Maathuis <madman2003@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: Add DRM driver for NVIDIA GPUs

This adds a drm/kms staging non-API stable driver for GPUs from NVIDIA.

This driver is a KMS-based driver and requires a compatible nouveau
userspace libdrm and nouveau X.org driver.

This driver requires firmware files not available in this kernel tree,
interested parties can find them via the nouveau project git archive.

This driver is reverse engineered, and is in no way supported by nVidia.

Support for nearly the complete range of nvidia hw from nv04->g80 (nv50)
is available, and the kms driver should support driving nearly all
output types (displayport is under development still) along with supporting
suspend/resume.

This work is all from the upstream nouveau project found at
nouveau.freedesktop.org.

The original authors list from nouveau git tree is:
Anssi Hannula <anssi.hannula@iki.fi>
Ben Skeggs <bskeggs@redhat.com>
Francisco Jerez <currojerez@riseup.net>
Maarten Maathuis <madman2003@gmail.com>
Marcin Kościelnicki <koriakin@0x04.net>
Matthew Garrett <mjg@redhat.com>
Matt Parnell <mparnell@gmail.com>
Patrice Mandin <patmandin@gmail.com>
Pekka Paalanen <pq@iki.fi>
Xavier Chantry <shiningxc@gmail.com>
along with project founder Stephane Marchesin <marchesin@icps.u-strasbg.fr>

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>