This patch is based on exynos-drm-next branch of Inki Dae's tree at:
git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git

DECON(Display and Enhancement Controller) is the new IP
in exynos7 SOC for generating video signals using pixel data.

DECON driver can be used to drive 2 different interfaces on Exynos7:
DECON-INT(video controller) and DECON-EXT(Mixer for HDMI)

The existing FIMD driver code was used as a template to create
DECON driver. Only DECON-INT is supported as of now, and
DECON-EXT support will be added later.

The current version of the driver supports video mode displays.

Changelog v2:
- Change config name, DRM_EXYNOS_DECON to DRM_EXYNOS7_DECON.
Signed-off-by: Akshu Agrawal <akshua@gmail.com>
Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

There is a case called disable_plane callback function even if
plane->crtc is NULL from exynos_drm_encoder_disable and it will cause
NULL pointer reference error.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

The exynos_plane_dpms function handles enabled flag of exynos plane and
calls internal hw driver callback function for hw overlay on/off. But
it causes state disharmory problem currently and is will be obstacle to
apply atomic operation later to keep non-standard per-plane dpms state
like enabled flag.

Let's remove enabled flag, it just stop to recall internal callback
function but hw drivers can handle it properly. And call internal
callback function directly then we can remove unnecessary
exynos_plane_dpms function
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

This was added by commit 3b8d1cf8 ("drm/exynos: add property for
crtc mode"). Currently we can control a plane used for crtc using
primary plane by universal plane feature. Stop to use non-standard
property to control primary plane.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

exynos_plane_dpms(DRM_MODE_DPMS_ON) calls the win_enable()'s callback
from the underlying layer. However neither one of these layers implement
win_enable() - FIMD, Mixer and VIDI. Thus the call to exynos_plane_dpms()
is pointless.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

The Exynos DRM driver doesn't follow the correct API when dealing with
dma_{alloc, mmap, free}_attrs functions and the
DMA_ATTR_NO_KERNEL_MAPPING attribute.

When a IOMMU is not available and the DMA_ATTR_NO_KERNEL_MAPPING is
used, the driver should use the pointer returned by dma_alloc_attr() as
a cookie.

The Exynos DRM driver directly uses the non-requested virtual kernel
address returned by the DMA mapping subsystem. This just works now
because the non-IOMMU codepath doesn't obey DMA_ATTR_NO_KERNEL_MAPPING
but we need to fix it before fixing the DMA layer.
Signed-off-by: Carlo Caione <carlo@caione.org>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

For default graphic window, mixer_win_commit() sets display size
register as fb size. Calling setplane with smaller fb size than
mode size to default window causes distorted display result. So
this patch replaces fb size with mode size for display size from
the mixer_win_commit().
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Acked-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

The hdmi outputs black screen only even though under the hood Xorg and
framebuffer console  are fine : devices found and initialized, but
not a pixel out.

Commit 93bca243 ("drm/exynos: remove struct exynos_drm_manager")
changed the call order of mixer_initialize with regards to
 exynos_drm_crtc_create.

This changes breaks hdmi out on Odroid U2 (linux-next with added
 Marek Szyprowski v4 hdmi patchset from linux-samsung-soc ML).

Restore the previous call ordering get hdmi to ouput proper pixels:
ie call mixer_initialize first then exynos_drm_crtc_create.

Fixes: 93bca243 ("drm/exynos: remove struct exynos_drm_manager")
Signed-off-by: Alban Browaeys <prahal@yahoo.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

Use driver internal struct as argument instead of struct exynos_drm_crtc
except functions of exynos_drm_crtc_ops and instead of struct
exynos_drm_display except functions of exynos_drm_display_ops.

It can reduce unnecessary variable declaration.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

We get wrong pipe value for crtc since commit 93bca243 ("drm/exynos:
remove struct exynos_drm_manager"). We should should increase pipe value
before call exynos_drm_crtc_create.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

The exynos_drm_dmabuf.c file doesn't include any module feature and it
isn't built to module.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

The exynos drm driver has DRIVER_PRIME capability, then it's reasonable
to support dmabuf as default. Remove DRM_EXYNOS_DMABUF config, it will
prevent that user selects the option unnecessarily.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

If system provides IOMMU feature, Exynos DRM should use it by default,
because the Exynos DRM subdrivers don't work correctly when Exynos IOMMU
driver has been enabled and no IOMMU support has been compiled into Exynos
DRM driver.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

Mixed need to have hdmi clock enabled to properly perform power on/off
sequences, so add handling of this clock directly to the mixer driver.
Dependency between hdmi clock and mixer module has been observed on
Exynos4 based boards.
Suggested-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

Merge tag 'drm-amdkfd-next-fixes-2015-02-03' of git://people.freedesktop.org/~gabbayo/linux into drm-next

- Fixing accounting of active queues
- Preserving a register internal state

* tag 'drm-amdkfd-next-fixes-2015-02-03' of git://people.freedesktop.org/~gabbayo/linux:
  drm/amdkfd: Preserve CP_MQD_IQ_RPTR internal state
  drm/amdkfd: Fix dqm->queue_count tracking

drm-intel-next-2015-01-30:
- chv rps improvements from Ville
- atomic state handling prep work from Ander
- execlist request tracking refactoring from Nick Hoath
- forcewake code consolidation from Chris&Mika
- fastboot plane config refactoring and skl support from Damien
- some more skl pm patches all over (Damien)
- refactor dsi code to use drm dsi helpers and drm_panel infrastructure (Jani)
- first cut at experimental atomic plane updates (Matt Roper)
- piles of smaller things all over, as usual

* 'drm-intel-next' of git://anongit.freedesktop.org/drm-intel: (102 commits)
  drm/i915: Remove bogus locking check in the hangcheck code
  drm/i915: Update DRIVER_DATE to 20150130
  drm/i915: Use pipe_config's cpu_transcoder for reading encoder hw state
  drm/i915: Fix a use-after-free in intel_execlists_retire_requests
  drm/i915: Split shared dpll setup out of __intel_set_mode()
  drm/i915: Don't do posting reads on getting forcewake
  drm/i915: Do uncore early sanitize after domain init
  drm/i915: Handle CHV in vlv_set_rps_idle()
  drm/i915: Remove nested work in gpu error handling
  drm/i915/documentation: Add intel_uncore.c to drm.tmpl
  drm/i915/dsi: remove intel_dsi_cmd.c and the unused functions therein
  drm/i915/dsi: move dpi_send_cmd() to intel_dsi.c and make it static
  drm/i915/dsi: remove old read/write functions in favor of new stuff
  drm/i915/dsi: make the vbt panel driver use mipi_dsi_device for transfers
  drm/i915/dsi: add drm mipi dsi host support
  drm/i915/dsi: switch to drm_panel interface
  drm/i915/skl: Enabling PSR on Skylake
  Revert "drm/i915: Fix mutex->owner inspection race under DEBUG_MUTEXES"
  drm/i915: Be consistent on printing seqnos
  drm/i915: Display current hangcheck status in debugfs
  ...

You can _never_ assert that a lock is not held, except in some very
restricted corner cases where it's guranteed that your code is running
single-threade (e.g. driver load before you've published any pointers
leading to that lock).

In addition the early return breaks a bunch of testcases since with
highly concurrent hangcheck stress tests the reset fails to work and
the test doesn't recover and time out.

This regression has been introduced in

commit b8d24a06
Author: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Date:   Wed Jan 28 17:03:14 2015 +0200

    drm/i915: Remove nested work in gpu error handling

Aside: It is possible to check whether a given task doesn't hold a
lock, but only when lockdep is enabled, using the lockdep_assert_held
stuff.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88908Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

Currently when a mode is rejected the reason is printed as a raw number.
Having to manually decode that to a enum drm_mode_status value is
tiresome. Have the code do the decoding instead and print the result
in a human readable format.

Just having an array of strings indexed with the mode status doesn't
work since the enum includes negative values. So we offset the status
by +3 which makes all the indexes non-negative. Also add a bit of
paranoia into the code to catch out of bounds accesses in case
someone adds more enum values but forgets to update the code.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

DRM_GEM_CMA_HELPER is depend on HAVE_DMA_ATTRS, or it will break the
building. The related error (with allmodconfig under xtensa):

    CC [M]  drivers/gpu/drm/drm_gem_cma_helper.o
  drivers/gpu/drm/drm_gem_cma_helper.c: In function 'drm_gem_cma_create':
  drivers/gpu/drm/drm_gem_cma_helper.c:110:19: error: implicit declaration of function 'dma_alloc_writecombine' [-Werror=implicit-function-declaration]
    cma_obj->vaddr = dma_alloc_writecombine(drm->dev, size,
                     ^
  drivers/gpu/drm/drm_gem_cma_helper.c:110:17: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
    cma_obj->vaddr = dma_alloc_writecombine(drm->dev, size,
                   ^
  drivers/gpu/drm/drm_gem_cma_helper.c: In function 'drm_gem_cma_free_object':
  drivers/gpu/drm/drm_gem_cma_helper.c:193:3: error: implicit declaration of function 'dma_free_writecombine' [-Werror=implicit-function-declaration]
     dma_free_writecombine(gem_obj->dev->dev, cma_obj->base.size,
     ^
  drivers/gpu/drm/drm_gem_cma_helper.c: In function 'drm_gem_cma_mmap_obj':
  drivers/gpu/drm/drm_gem_cma_helper.c:330:8: error: implicit declaration of function 'dma_mmap_writecombine' [-Werror=implicit-function-declaration]
    ret = dma_mmap_writecombine(cma_obj->base.dev->dev, vma,
          ^
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

Rebase of main pull for 3.20.  There was a mid-air collision between
the bridge changes and msm eDP support.  And atomic dpms support broke
msm somewhat, due to using prepare/commit hooks in a different way.
Compared to the initial pull req, this fixes up a memory leak caused
by the bridge changes, rebases the eDP support on the bridge changes,
and migrates to the atomic dpms hooks to fix the dpms breakage.

Highlights (from original pull req):

1) YUV support for mdp4 and mdp5
2) eDP support
3) hw cursor support for mdp5[*]
4) additional hdmi support for apq8084 (snapdragon 805)
5) few bug fixes

Note that I may have a later pull to enable hdmi hpd irqs.. but
(un)fortunately I seem to have a particularly troublesome monitor..  I
managed to figure out a workaround for spurious hpd disconnect irqs
that works with some of my boards but not others, so holding off on
that patch for now.  There are also patches for HDCP support, but
those are waiting on some scm patches outside of drm so I think
waiting until 3.21 at this point.

* 'msm-next' of git://people.freedesktop.org/~robclark/linux: (22 commits)
  drm/msm: add moduleparam to disable fbdev
  drm/msm: fix build error with W=1
  drm/msm/mdp5: Fix negative SMP block allocation
  drm/msm/hdmi: disallow interlaced
  drm/msm/atomic: fix issue with gnome-shell wayland
  drm/msm/mdp5: Add hardware cursor support
  drm/msm/hdmi: rework hdmi configurations, using dt_match[]
  drm/msm/hdmi: Add HDMI platform config for apq8084
  drm/msm/hdmi: use dynamic allocation for hdmi resources
  drm/msm/mdp5: fix parameter type for mdp5_ctl_set_intf()
  drm/msm/dp: use link power helpers
  drm/msm: Add the eDP connector in msm drm driver (V2)
  drm/msm: Initial add eDP support in msm drm driver (v5)
  drm/msm/mdp4: add YUV format support
  drm/msm/mdp5: add NV12 support for MDP5
  drm/msm/mdp: add common YUV information for MDP4/MDP5
  drm/msm: update generated headers
  drm/msm: Do not BUG_ON(!spin_is_locked()) on UP
  drm/msm/hdmi: fix memory leak after bridge changes
  drm/msm: fix fallout of atomic dpms changes
  ...

Useful to avoid recompiling to disable fbdev.  Useful because otherwise
the first modeset happens under console_lock (ie. debugging sadness).
Signed-off-by: Rob Clark <robdclark@gmail.com>

Combining -Werror with all the extra warning flags that W=1 adds doesn't
go so well.  Especially because some of the warnings triggered are from
included headers.  So just drop -Werror.
Signed-off-by: Rob Clark <robdclark@gmail.com>

In case we request a number of SMP blocks which is lower than
the already reserved blocks, we should not try to allocate a
negative number, but 0 blocks instead.
Signed-off-by: Stephane Viau <sviau@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

So after clarification from qcom, it seems mdp4 and mdp5 support
*de*interlacing but not generating an interlaced signal.  Which would
explain why interlaced modes never worked properly.

So disable in the one connector which was claiming to support
interlaced.
Signed-off-by: Rob Clark <robdclark@gmail.com>

The gnome-shell wayland compositor triggers a setcrtc with an fb that is
still being rendered, triggering the call to _wait_fence_interruptable().
But a NULL timeout means "don't wait, return -EBUSY if not ready", which
in turn causes the setcrtc to fail.
Signed-off-by: Rob Clark <robdclark@gmail.com>

This patch implements the hardware accelarated cursor
support for MDP5 platforms.
Signed-off-by: Beeresh Gopal <gbeeresh@codeaurora.org>
Signed-off-by: Wentao Xu <wentaox@codeaurora.org>
Signed-off-by: Stephane Viau <sviau@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

In the same idea mdp5_cfg was added, this change allows us to quickly
add new instances, such as apq8084's HDMI in this case.
Signed-off-by: Stephane Viau <sviau@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

This change add the regulator/clock configuration for MDP5 v1.3.
This config is close to the one already existing for 8x74, except
that one more regulator is needed (hpd-5v-en).
Signed-off-by: Stephane Viau <sviau@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

Instead of reporting BUG_ON when resources arrays are not
dimensioned correctly, this patch does a dynamic allocation of
these arrays. This is needed for the following patches that add a
regulator for a new target.
Signed-off-by: Stephane Viau <sviau@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

mdp5_ctl_set_intf()'s second argument should be "int", not "enum mdp5_intf".
The passed in value is "intf", not "intf_id".
Signed-off-by: Stephane Viau <sviau@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

Now that we have a helper for drm_dp_link_power_down(), use dp helpers
instead of rolling our own.
Signed-off-by: Rob Clark <robdclark@gmail.com>

Modified the hard-coded hdmi connector/encoder implementations in msm drm
driver to support both edp and hdmi.

V1: Initial change

V2: Address Thierry's change
Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

This change adds a new eDP connector in msm drm driver. With this
change, eDP panel can work with msm platform under drm framework.

v1: Initial change

v2: Address Rob's comments
    Use generated header file for register definitions
    Change to devm_* APIs

v3: Address Thierry's comments and rebase on top of atomic changes
    Remove edp_bridge_mode_fixup
    Remove backlight control code and rely on pwm-backlight
    Remove continuous splash screen support for now
    Change to gpiod_* APIs

v4: Fix kbuild test issue
Signed-off-by: Hai Li <hali@codeaurora.org>
[robclark: v5: rebase on drm_bridge changes in drm-next]
Signed-off-by: Rob Clark <robdclark@gmail.com>

The patch add support for YUV frame format
for MDP4 platform.
Signed-off-by: Beeresh Gopal <gbeeresh@codeaurora.org>
Signed-off-by: Stephane Viau <sviau@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

This change adds the NV12 format support for public planes.
Signed-off-by: Stephane Viau <sviau@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

Both MDP4 and MDP5 share some code as far as YUV support is
concerned. This change adds this information and will be followed
by the actual MDP4 and MDP5 YUV support patches.
Signed-off-by: Stephane Viau <sviau@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

Resync from rnndb database, to pull in register defines for:
 * eDP
 * HDMI/HDCP
 * mdp4/mdp5 YUV support
 * mdp5 hw cursor support
Signed-off-by: Rob Clark <robdclark@gmail.com>

On !SMP systems spinlocks do not exist. Thus checking of they
are active will always fail.

Use
  assert_spin_locked(lock);
instead of
  BUG_ON(!spin_is_locked(lock));
to not BUG() on all UP systems.
Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
[robclark: drop stray ')']
Signed-off-by: Rob Clark <robdclark@gmail.com>

3d3f8b1f ("drm/bridge: make bridge registration independent of drm
flow") resulted that the hdmi bridge object would be leaked at teardown.
Just switch over to devm_kzalloc() as the easy way to solve this.
Signed-off-by: Rob Clark <robdclark@gmail.com>

As a result of atomic DPMS support, the various prepare/commit hooks get
called in a way that msm dislikes.  We were expecting prepare/commit to
bracket a modeset, which is no longer the case.  This was needed to hold
various extra clk's (such as interface clks) on while we are touching
registers, and in the case of mdp4 holding vblank enabled.

The most straightforward way to deal with this, since we already have
our own atomic_commit(), is to just handle prepare/commit internally to
the driver (with some additional vfuncs for mdp4 vs mdp5), and switch
everything over to instead use the new enable/disable hooks.  It doesn't
really change too much, despite the code motion.  What used to be in the
encoder/crtc dpms() fxns is split out into enable/disable.

We should be able to drop our own enable-state tracking, as the atomic
helpers should do this for us.  But keeping that for the short term for
extra debugging as atomic stablizes.
Signed-off-by: Rob Clark <robdclark@gmail.com>