Changelog v2:
move iommu support feature to mixer side.
And below is Prathyush's comment.

According to the new IOMMU framework for exynos sysmmus,
the owner of the sysmmu-tv is mixer (which is the actual
device that does DMA) and not hdmi.
The mmu-master in sysmmu-tv node is set as below in exynos5250.dtsi
	sysmmu-tv {
		-
		mmu-master = <&mixer>;
	};

Changelog v1:
The iommu will be enabled when hdmi sub driver is probed and
will be disabled when removed.
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>

The iommu will be enabled when fimd sub driver is probed and
will be disabled when removed.
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>

Changelog v4:
- fix condition to drm_iommu_detach_device funtion.

Changelog v3:
- add dma_parms->max_segment_size setting of drm_device->dev.
- use devm_kzalloc instead of kzalloc.

Changelog v2:
- fix iommu attach condition.
  . check archdata.dma_ops of drm device instead of
    subdrv device's one.
- code clean to exynos_drm_iommu.c file.
  . remove '#ifdef CONFIG_ARM_DMA_USE_IOMMU' from exynos_drm_iommu.c
    and add it to driver/gpu/drm/exynos/Kconfig.

Changelog v1:
This patch adds iommu support for exynos drm framework with dma mapping
api. In this patch, we used dma mapping api to allocate physical memory
and maps it with iommu table and removed some existing codes and added
new some codes for iommu support.

GEM allocation requires one device object to use dma mapping api so
this patch uses one iommu mapping for all sub drivers. In other words,
all sub drivers have same iommu mapping.
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>

This patch adds support for DMA_ATTR_FORCE_CONTIGUOUS attribute for
dma_alloc_attrs() in IOMMU-aware implementation. For allocating physically
contiguous buffers Contiguous Memory Allocator is used.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>

This patch adds DMA_ATTR_FORCE_CONTIGUOUS attribute to the DMA-mapping
subsystem.

By default DMA-mapping subsystem is allowed to assemble the buffer
allocated by dma_alloc_attrs() function from individual pages if it can
be mapped as contiguous chunk into device dma address space. By
specifing this attribute the allocated buffer is forced to be contiguous
also in physical memory.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>

Currently the only users of drm_vblank_off() are i915 and gma500,
neither of which holds the event_lock when calling this function.
Fix this by holding the event_lock while traversing the list.
Signed-off-by: NImre Deak <imre.deak@intel.com>
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>

Currently the exynos driver calls drm_vblank_off() with the event_lock
held, while drm_vblank_off() will lock vbl_time and vblank_time_lock.
This lock dependency chain conflicts with the one in drm_handle_vblank()
where we first lock vblank_time_lock and then the event_lock.

Fix this by removing the above drm_vblank_off() calls which are in fact
never executed: drm_dev->vblank_disable_allowed is only ever non-zero
during driver init, until it's set in {fimd,vidi}_subdrv_probe. Both the
driver init and open code is protected by drm_global_mutex, so the
earliest page flip ioctl can happen only after vblank_disable_allowed is
set to 1. Thus {fimd,vidi}_finish_pageflip - with pending flip events -
will always get called with vblank_disable_allowed being 1.
Signed-off-by: NImre Deak <imre.deak@intel.com>
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>

It's guaranteed that for each event on pageflip_event_list we have
called drm_vblank_get() - see exynos_drm_crtc_page_flip() - so checking
for this is redundant.

Also we need to call drm_vblank_put() for each event on the list, not
only once, otherwise we'd leak vblank references if there are multiple
events on the list.
Signed-off-by: NImre Deak <imre.deak@intel.com>
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>

Signed-off-by: NImre Deak <imre.deak@intel.com>
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>

Check overlay_ops is not NULL as checked in the previous 'if' condition.
Fixes the following smatch error:
drivers/gpu/drm/exynos/exynos_drm_encoder.c:509 exynos_drm_encoder_plane_disable()
error: we previously assumed 'overlay_ops' could be null (see line 499)
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>

Fixes the following sparse warnings:
drivers/gpu/drm/exynos/exynos_drm_fimd.c:65:25: warning:
symbol 'exynos4_fimd_driver_data' was not declared. Should it be static?
drivers/gpu/drm/exynos/exynos_drm_fimd.c:69:25: warning:
symbol 'exynos5_fimd_driver_data' was not declared. Should it be static?
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>

Chagelog v2:
Move encoder's dpms updating into exynos_drm_encoder_commit
function because when crtc's dpms is updated, encoder's dpms
is updated also. This would induce the issue that encoder
isn't disabled after crtc is disabled.

Changelog v1:
This patch fixes a issue that overlay data aren't applied
to real hardware when dpms off goes to on after setcrtc
was requested like below,
    dpms off -> setcrtc -> dpms off -> dpms on

For this, it makes encoder's dpms to be updated when
setcrtc is requested.
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>

plane->fb will be set to new fb after update_plane callback is called
by drm_mode_set_plane()
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>

With iommu, buffer->dma_addr has device addres so this patch
fixes for physical address to be set to fix.smem_start always.
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>

Daniel writes:
Besides the big item of lifting the "preliminary hw support" tag from the
 Haswell code, just small bits&pieces all over:
 - Leftover Haswell patches and some fixes from Paulo
 - LyncPoint PCH support (for hsw)
 - OOM handling improvements from Chris Wilson
 - connector property and send_vblank_event refactorings from Rob Clark
 - random pile of small fixes

 Note that the send_vblank refactorings will cause some locking WARNs to
 show up. Imre has fixed that up, but since all the driver changes outside
 of the drm core have been for exonys, those four patches are merged
 through the exonys-next tree.

Meh, I've forgotten to cherry-pick an important fix from Ben for a
regression in the 3.8 gen6+ gtt code. New pull request below. While I'm at
it, the hdmi VIC patch for the drm edid code is still in my queue, I'll
send you that in the next 3.8-fixes pull.

* 'for-airlied' of git://people.freedesktop.org/~danvet/drm-intel: (33 commits)
  drm/i915: Fix pte updates in ggtt clear range
  drm/i915: promote Haswell to full support
  drm/i915: Report the origin of the LVDS fixed panel mode
  drm/i915: LVDS fallback to fixed-mode if EDID not present
  drm/i915/sdvo: kfree the intel_sdvo_connector, not drm_connector, on destroy
  drm/i915: drm_connector_property -> drm_object_property
  drm/i915: use drm_send_vblank_event() helper
  drm/i915: Use pci_resource functions for BARs.
  drm/i915: Borrow our struct_mutex for the direct reclaim
  drm/i915: Defer assignment of obj->gtt_space until after all possible mallocs
  drm/i915: Apply the IBX transcoder A w/a for HDMI to SDVO as well
  drm/i915: implement WaMbcDriverBootEnable on Haswell
  drm/i915: fix intel_ddi_get_cdclk_freq for ULT machines
  drm/i915: make the panel fitter work on pipes B and C on Haswell
  drm/i915: make the panel fitter work on pipes B and C on IVB
  drm/i915: don't intel_crt_init if DDI A has 4 lanes
  drm/i915: make DP work on LPT-LP machines
  drm/i915: fix false positive "Unclaimed write" messages
  drm/i915: use cpu/pch transcoder on intel_enable_pipe
  drm/i915: don't limit Haswell CRT encoder to pipe A
  ...

This bug was introduced by me:
commit e76e9aeb
Author: Ben Widawsky <ben@bwidawsk.net>
Date:   Sun Nov 4 09:21:27 2012 -0800

    drm/i915: Stop using AGP layer for GEN6+

The existing code uses memset_io which follows memset semantics in only
guaranteeing a write of individual bytes. Since a PTE entry is 4 bytes,
this can only be correct if the scratch page address is 0.

This caused unsightly errors when we clear the range at load time,
though I'm not really sure what the heck is referencing that memory
anyway. I caught this is because I believe we have some other bug where
the display is doing reads of memory we feel should be cleared (or we
are relying on scratch pages to be a specific value).
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Add myself as the maintainer of the NVIDIA Tegra DRM driver.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Acked-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

Fixed build warning as below:

drivers/gpu/drm/drm_pci.c: In function 'drm_pcie_get_speed_cap_mask':
drivers/gpu/drm/drm_pci.c:496:9: warning: 'lnkcap' may be used uninitialized in this function [-Wuninitialized]
drivers/gpu/drm/drm_pci.c:497:10: warning: 'lnkcap2' may be used uninitialized in this function [-Wuninitialized]
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

core/device.h was included twice.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

nouveau_ttm.h was included twice.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Fixes a PCE0 page fault noticed on NVD9 during module unload.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

On 3.7-rc6, add missing newline to to prevent the following kernel log
line getting appended to the current one after switching the integrated
GPU and suspending the discrete GPU.
Signed-off-by: NDaniel J Blueman <daniel@quora.org>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

These objects leak VRAM - but only on module unload.
Signed-off-by: NMarcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Fixes GART leak (as accounted by nouveau_drm.gem.gart_available).
Signed-off-by: NMarcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Copy/pasted from nouveau_gem_new.
Signed-off-by: NMarcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NMarcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

It fixes a bug that would have been introduced when adding more
sudevs/engines.
Signed-off-by: NMartin Peres <martin.peres@labri.fr>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

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

NVIDIA also appear to use the same class on Fermi/Kepler for PPP.

Will allow use of the engine if firmware (nvXX_fuc086) provided.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Will allow use of the engine if firmware (nvXX_fuc086) provided.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Will allow use of the engine if firmware (nvXX_fuc085) provided.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Will allow use of the engine if firmware (nvXX_fuc084) provided.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Later chipsets use falcon anyway, and I can't currently see a good need
for a shared base class.

PPP will get the same treatment once Maarten's patches are merged.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

No support for the class yet, but will be pulled in with Maarten's Fermi
vdec patches.  The Kepler PPP class is identical.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Will allow use of the engine if firmware (nvXX_fuc085) provided.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Will allow use of the engine if firmware (nvXX_fuc084) provided.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Previously, if either vram/gart handles were specified as ~0, the ioctl
call would fail.  In order to hack engine selection into the ioctl for
kepler, we now define (fb_ctxdma_handle == ~0) to mean "engine mask is
in tt_ctxdma_handle".

This approach also allows new userspace to detect lack of support for
non-PGRAPH channels on older kernels.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

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

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

nv50_fb_trap() will now be called automagically by the mc intr handler,
rather than each engine's handler having to check for traps manually.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>