So far we only allowed for 1 retry and just failed the query
- and thereby high precision vblank timestamping - if we did
not get a reasonable result, as such a failure wasn't considered
all too horrible. There are a few NVidia gpu models out there which
may need a bit more than 1 retry to get a successful query result
under some conditions.

Since Linux 4.4 the update code for vblank counter and timestamp
in drm_update_vblank_count() changed so that the implementation
assumes that high precision vblank timestamping of a kms driver
either consistently succeeds or consistently fails for a given
video mode and encoder/connector combo. Iow. switching from success
to fail or vice versa on a modeset or connector change is ok, but
spurious temporary failure for a given setup can confuse the core
code and potentially cause bad miscounting of vblanks and confusion
or hangs in userspace clients which rely on vblank  stuff, e.g.,
desktop compositors.

Therefore change the max retry count to a larger number - more than
any gpu so far is known to need to succeed, but still low enough
so that these queries which do also happen in vblank interrupt are
still fast enough to be not disastrously long if something would
go badly wrong with them.

As such sporadic retries only happen seldom even on affected gpu's,
this could mean a vblank irq could take a few dozen microseconds
longer every few hours of uptime -- better than a desktop compositor
randomly hanging every couple of hours or days of uptime in a hard
to reproduce manner.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

Fixes OOB VBIOS accesses on some boards.

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

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>

The code attempts to enable them, but hits an undefined behaviour by
shifting by the entire register's width:

    int lines = 32;
    u32 mask = (1 << lines) - 1;    // 00000000 on x86
    u32 mask = (1 << lines) - 1;    // ffffffff on arm (32)
    u32 mask = (1 << lines) - 1;    // 00000000 on arm64
    u32 mask = (1ULL << lines) - 1; // ffffffff everywhere

Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

Forked from GP106 implementation.

Differences:
- 1 PPC/GPC
- Slightly different grctx magics

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

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

GP10B's power is managed by generic PM domains, so it does not require a
VDD regulator. Add this option into the chip function structure.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

GR is similar to GP100, with a few unavailable registers.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

GP10B requires a specific initialization sequence due to the absence of
devinit.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

GP10B's MC is compatible with GP100's, but engines need to be explicitly
put out of ELPG during init.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

GP10B's FB is largely compatible with the GP100 implementation.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

GP10B's FIFO is similar to GP100's, but only allows 512 channels.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

The GP10B firmware is very close to GM20B's. The only difference is that
it supports booting multiple falcons. In order to avoid having too much
functions and structures shared, implement its support in the same
source file as GM20B firmware.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

GP10B's secboot is largely similar to GM20B's. Only differences are MC
base address and the fact that GPCCS is also securely managed.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

Allow the MC base address to be specified as an argument for the WPR
region reading function. GP10B uses a different address layout as GM20B,
so this is necessary. Also export the function to be used by GP10B.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

The LS firmware post-run hook is the right place to start said LS
firmware. Moving it here also allows to remove special handling in the
ACR code.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

A LS post-run hook can meet an error meaning the failure of secure boot.
Make sure this can be reported.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

Having access to the secboot instance loading a LS firmware can be
useful to LS firmware handlers. At least more useful than just having an
out-of-context subdev pointer.

GP10B's firmware will also need to know the WPR address, which can be
obtained from the secboot instance.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

Change the secboot and msgqueue interfaces to take a mask of falcons to
reset instead of a single falcon. The GP10B firmware interface requires
FECS and GPCCS to be booted in a single firmware command.

For firmwares that only support single falcon boot, it is trivial to
loop over the mask and boot each falcons individually.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

The gk20a implementation of instance memory uses vmap()/vunmap() to map
memory regions into the kernel's virtual address space. These functions
may sleep, so protecting them by a spin lock is not safe. This triggers
a warning if the DEBUG_ATOMIC_SLEEP Kconfig option is enabled. Fix this
by using a mutex instead.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Tested-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

Forked from GP106 implementation.

Split out from commit enabling secboot/gr support so that it can be
added to earlier kernels.

Cc: stable@vger.kernel.org	[4.10+]
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

When the atomic support was added to nouveau, the DRM core did not do this.

However, later in the same merge window, a commit (drm/fence: add in-fences
support) was merged that added it, leading to use-after-frees of the fence
object.

Cc: stable@vger.kernel.org	[4.10+]
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

Cc: stable@vger.kernel.org	[4.10+]
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

The NV4A (aka NV44A) is an oddity in the family. It only comes in AGP
and PCI varieties, rather than a core PCIE chip with a bridge for
AGP/PCI as necessary. As a result, it appears that the MMU is also
non-functional. For AGP cards, the vast majority of the NV4A lineup,
this worked out since we force AGP cards to use the nv04 mmu. However
for PCI variants, this did not work.

Switching to the NV04 MMU makes it work like a charm. Thanks to mwk for
the suggestion. This should be a no-op for NV4A AGP boards, as they were
using it already.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=70388


Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: stable@vger.kernel.org
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Fixes: 590801c1 ("drm/nouveau/mpeg: remove dependence on namedb/engctx lookup")
Cc: stable@vger.kernel.org # v4.3+
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

RCAR GEN3 DU HDMI support.

* 'drm/next/du' of git://linuxtv.org/pinchartl/media: (22 commits)
  drm: rcar-du: Add HDMI outputs to R8A7795 device description
  drm: rcar-du: Add DPLL support
  drm: rcar-du: Skip disabled outputs
  drm: rcar-du: Add Gen3 HDMI encoder support
  dt-bindings: display: renesas: Add R-Car Gen3 HDMI TX DT bindings
  drm: rcar-du: Hardcode encoders types to DRM_MODE_ENCODER_NONE
  drm: rcar-du: Replace manual bridge implementation with DRM bridge
  drm: rcar-du: Add support for LVDS mode selection
  drm: rcar-du: Use the DRM panel API
  drm: rcar-du: Document the vsps property in the DT bindings
  drm: rcar-du: Remove wait field from rcar_du_device structure
  drm: rcar-du: Make sure the VSP is initialized on platforms that need it
  drm: rcar-du: Use DRM core's atomic commit helper
  drm: rcar-du: Clear handled event pointer in CRTC state
  drm: rcar-du: Handle event when disabling CRTCs
  drm: rcar-du: Don't open code of_device_get_match_data()
  drm: rcar-du: Switch to encoder .atomic_mode_set() helper function
  drm: panels: Add LVDS panel driver
  drm: Add data transmission order bus flag
  devicetree/bindings: display: Add bindings for two Mitsubishi panels
  ...

Update the device description with the two available HDMI outputs.

Signed-off-by: Koji Matsuoka <koji.matsuoka.xm@renesas.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

The implementation hardcodes a workaround for the H3 ES1.x SoC
regardless of the SoC revision, as the workaround can be safely applied
on all devices in the Gen3 family without any side effect.

Signed-off-by: Koji Matsuoka <koji.matsuoka.xm@renesas.com>
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

When a DT node connected to a DU output is disabled no bridge will ever
be instantiated for it. Skip the output in that case.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

The R-Car Gen3 SoCs include on-chip DesignWare HDMI encoders. Support
them with a platform driver to provide platform glue data to the dw-hdmi
driver.

The driver is a complete rewrite of code coming from the Renesas BSP,
save for the values in the PHY parameters table.

Signed-off-by: Koji Matsuoka <koji.matsuoka.xm@renesas.com>
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>

The Renesas R-Car Gen3 SoCs use a Synopsys DWC HDMI TX encoder IP. Add
corresponding device tree bindings based on the DWC HDMI TX bindings
model.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Rob Herring <robh@kernel.org>

Unlike the connector type, the encoder type is unused by userspace. As
it is equally unused in the driver, except in a single location where
the connector type can be used instead, hardcode it to
DRM_MODE_ENCODER_NONE. This allow removing all code that tries to
determine (unsuccessfully in case a bridge is used) the encoder type.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

The rcar-du driver contains a manual implementation of HDMI and VGA
bridges. Use DRM bridges to replace it.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

Retrieve the LVDS mode from the panel and configure the LVDS encoder
accordingly. LVDS mode selection is static as LVDS panels can't be
hot-plugged on any of the device supported by the driver. Support for
dynamic mode selection can be implemented in the future when needed.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

Instead of parsing the panel device tree node manually, use the panel
API to delegate panel handling to a panel driver.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

The property is used by the driver but is missing from the DT bindings.
Document it.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

The field is a left-over from the switch to the atomic commit helper.
It's unused, remove it.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

On Gen3 platforms planes are managed by the external VSP compositor on
behalf of DRM/KMS. If VSP compositor support is not enabled in the DU
driver, the VSP initialization stub routine is called. Return an error
from that stub to fail explicitly, otherwise the device won't be usable
and the driver will crash.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
[Clarified commit message]
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

The DRM core atomic helper now supports asynchronous commits natively.
The custom rcar-du implementation isn't needed anymore, remove it.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>