apple-gmux: Add initial documentation

Document what I've learned so far about the gmux so that we can
collaboratively reverse-engineer its remaining unknown bits
without everyone having to start from scratch.

The DOC sections are bound together in the gpu.tmpl DocBook
under a new vga_switcheroo "Handlers" chapter. Eventually
this should be amended with documentation about the four other
handlers that exist so far (nouveau v1 DSM, nouveau Optimus DSM,
radeon ATPX, amdgpu ATPX).

Requires kernel-doc with asciidoc support.

The EFI variable was reverse-engineered by Bruno Bierbaumer
<bruno@bierbaumer.net> and Andreas Heider <andreas@meetr.de>.

Some of the remaining open questions:

* How are vblank intervals synchronized on retinas to achieve seamless
  switching? Is the DP mux capable of this? It's not mentioned in the
  data sheets. Or is it done at the OS level, i.e. do we have to
  synchronize vblank intervals between DRM drivers? There's a signal
  coming from the panel connector and going into gmux, could this be
  the vblank signal as received by the panel to properly time the
  switch?

* On retinas there's an I2C bus between gmux and the connector of the
  right I/O board, apparently leading to the Parade PS8401A HDMI
  repeater. What is this for, is it controlled via gmux registers?
  Data sheet:
  http://www.paradetech.com/products/jitter-cleaning-repeaters/ps8401/

* On retinas there's an I2C bus between gmux and the LED driver.
  Pre-retinas connected the LED driver to SMBUS. Are there additional
  gmux registers on retinas to control it?

* The MacPro6,1 2013 also has a gmux, the same Renesas R4F2113 as the
  retina MacBook Pro. The Mac Pro doesn't have a built-in display,
  so what is its purpose? Power control of the dual FirePro GPUs?
  Switching of the external DP/Thunderbolt ports? The iFixit teardown
  clearly shows one TI HD3SS212 DisplayPort mux on the logic board next
  to one of the three Thunderbolt controllers. However six muxes would
  be necessary to switch all six ports between GPUs. The mux is probably
  necessary for one of the display configurations allowed by Apple,
  but which one?
  https://www.ifixit.com/Teardown/Mac+Pro+Late+2013+Teardown/20778
  https://d3nevzfk7ii3be.cloudfront.net/igi/fELBTnt31QhnDsqq.huge
  https://support.apple.com/en-us/HT202801

* Registers we haven't decoded yet:
  0x700 32 Bit configmap?
  0x708 32 Bit power sequence?
  0x712  8 Bit status of clock from panel on retinas?
  0x713  8 Bit dito?
  0x724 16 Bit backlight, raw value?
  0x760 32 Bit backlight
  0x764 32 Bit backlight
  0x768  8 Bit backlight
  0x76a 16 Bit backlight
  0x76c 16 Bit backlight
  0x76e 16 Bit backlight
  0x77f        edp/dp/hdmi probe? retina only.

* Addition by Bruno Prémont <bonbons@linux-vserver.org>:
  "Missing is also precise knowledge as to what the gmux depends on.
  From behavioral reports, it is somehow sensitive to VGA IO/MEM
  routing (it apparently needs the routing to go to integrated GPU,
  not discrete GPU).
  When the routing is inappropriate backlight control IO just reads back
  as 0xFF (and eventually gmux IO in general does so)."

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Darren Hart <dvhart@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/da309e436fbeac886477d80376457b7d83ea4b2d.1452431795.git.lukas@wunner.de
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm: move MODULE_PARM_DESC to other file

We moved the module options from drm_drv.c to drm_irq.c in 18882995713d
('drm: Move vblank related module options into drm_irq.c').  Let's move
the MODULE_PARM_DESC()s as well so they're together.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20160108110045.GF32195@mwanda
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/edid: index CEA/HDMI mode tables using the VIC

Add a dummy entry to CEA/HDMI mode tables so they can be indexed
directly using the VIC, avoiding a +1/-1 dance here and there. This adds
clarity to the error checking for various functions that return the VIC
on success and zero on failure; we can now explicitly check for 0
instead of just subtracting one from an unsigned type.

Also add drm_valid_cea_vic() and drm_valid_hdmi_vic() helpers for
checking valid VICs.

v2: add drm_valid_cea_vic and drm_valid_hdmi_vic helpers (Ville)
    use { } instead of { 0 } for initializing the dummy modes

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1452252111-6439-1-git-send-email-jani.nikula@intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/atomic: Remove drm_atomic_connectors_for_crtc.

Now that connector_mask is reliable there's no need for this
function any more.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1451908400-25147-6-git-send-email-maarten.lankhorst@linux.intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/i915: Update connector_mask during readout, v2.

drm/i915: Update connector_mask during readout, v2.

The connector_mask may be used any time during the non-atomic
.crtc_disable which is called before the full atomic state is
set up and needs to be accurate for that reason.

Changes since v1:
- Update connector_mask in readout_hw_state and add a comment.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/568D1C55.8010001@linux.intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm: Remove opencoded drm_gem_object_release_handle()

drm_gem_handle_delete() contains its own version of
drm_gem_object_release_handle(), so lets just call the release method
instead.

Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1451986951-3703-2-git-send-email-chris@chris-wilson.co.uk
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm: Do not set outparam on error during GEM handle allocation

Good practice dictates that we do not leak stale information to our
callers, and should avoid overwriting an outparam on an error path.

Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1451986951-3703-1-git-send-email-chris@chris-wilson.co.uk
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/docs: more leftovers from the big vtable documentation pile

Another pile of vfuncs from the old gpu.tmpl xml documentation that
I've forgotten to delete. I spotted a few more things to
clarify/extend in the new kerneldoc while going through this once
more.

v2: Spelling fixes (Thierry).

v3: More spelling fixes and use Thierry's proposal to clarify why
drivers need to validate modes both in ->mode_fixup and ->mode_valid.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

drm/atomic-helper: Reject legacy flips on a disabled pipe

We want this for consistency with existing page_flip semantics.

Since this spurred quite a discussion on IRC also document why we
reject event generation when the pipe is off: It's not that it's hard
to implement, but userspace has a track recording which proves that it's
way too easy to accidentally abuse and cause havoc. We want to make
sure userspace doesn't get away with that.

v2: Somehow thought we do reject events already, but that code only
existed in my imagination ... Also suggestions from Thierry.

Cc: Daniel Stone <daniels@collabora.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1449564561-3896-4-git-send-email-daniel.vetter@ffwll.ch

drm/atomic: add connector mask to drm_crtc_state.

It can be useful to iterate over connectors without grabbing
connection_mutex. It can also be used to see how many connectors
are on a crtc without iterating over the list.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1451908400-25147-4-git-send-email-maarten.lankhorst@linux.intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/tegra: Use __drm_atomic_helper_reset_connector for subclassing connector state, v2.

Changes since v1:
- Do not reset if state allocation fails.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Thierry Reding <treding@nvidia.com> #irc
Link: http://patchwork.freedesktop.org/patch/msgid/1451908400-25147-3-git-send-email-maarten.lankhorst@linux.intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/atomic: Add __drm_atomic_helper_connector_reset, v2.

This is useful for drivers that subclass connector_state, like tegra.

Changes since v1:
- Docbook updates.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1451908400-25147-2-git-send-email-maarten.lankhorst@linux.intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/i915: Set connector_state->connector using the helper.

The atomic helper sets connector_state->connector, which the i915
code didn't. This will become a problem when we start using it.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1451908400-25147-1-git-send-email-maarten.lankhorst@linux.intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm: Use a normal idr allocation for the obj->name

Unlike the handle, the name table uses a sleeping mutex rather than a
spinlock. The allocation is in a normal context, and we can use the
simpler sleeping gfp_t, rather than have to take from the atomic
reserves.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1451902261-25380-3-git-send-email-chris@chris-wilson.co.uk
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm: Only bump object-reference count when adding first handle

We only need a single reference count for all handles (i.e. non-zero
obj->handle_count) and so can trim a few atomic operations by only
taking the reference on the first handle and dropping it after the last.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1451902261-25380-2-git-send-email-chris@chris-wilson.co.uk
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm: Balance error path for GEM handle allocation

The current error path for failure when establishing a handle for a GEM
object is unbalance, e.g. we call object_close() without calling first
object_open(). Use the typical onion structure to only undo what has
been set up prior to the error.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

vga_switcheroo: Prettify documentation

Fix indentation of vga_switcheroo sections in gpu.tmpl.

Change section type of API documentation from "chapter" to "sect1"
so that the individual functions no longer clutter up the ToC.
Group together under a new "API" chapter.

Fix wording "heretoforth" -> "henceforth".

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/dp/mst: constify drm_dp_mst_topology_cbs structures

The drm_dp_mst_topology_cbs structures are never modified, so declare them
as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/gma500: use to_pci_dev()

Use to_pci_dev() instead of open-coding it.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/fb-helper: Use proper plane mask for fb cleanup

pan_display_atomic() calls drm_atomic_clean_old_fb() to sanitize the
legacy FB fields (plane->fb and plane->old_fb).  However it was building
the plane mask to pass to this function incorrectly (the bitwise OR was
using plane indices rather than plane masks).  The end result was that
sometimes the legacy pointers would become out of sync with the atomic
pointers.  If another operation tried to re-set the same FB onto the
plane, we might end up with the pointers back in sync, but improper
reference counts, which would eventually lead to system crashes when we
accessed a pointer to a prematurely-destroyed FB.

The cause here was a very subtle bug introduced in commit:

        commit 07d3bad6c1210bd21e85d084807ef4ee4ac43a78
        Author: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
        Date:   Wed Nov 11 11:29:11 2015 +0100

            drm/core: Fix old_fb handling in pan_display_atomic.

I found the crashes were most easily reproduced (on i915 at least) by
starting X and then VT switching to a VT that wasn't running a console
instance...the sequence of vt/fbcon entries that happen in that case
trigger a reference count mismatch and crash the system.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93313
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm: use dev_name as default unique name in drm_dev_alloc()

The following code pattern exists in some DRM drivers:

    ddev = drm_dev_alloc(&driver, parent_dev);
    drm_dev_set_unique(ddev, dev_name(parent_dev));

(Sometimes dev_name(ddev->dev) is used, which is the same.)

As suggested in
http://lists.freedesktop.org/archives/dri-devel/2015-December/096441.html,
the unique name of a new DRM device can be set as dev_name(parent_dev)
when parent_dev is not NULL (vgem is a special case).

Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm: make drm_dev_set_unique() not use a format string

drm_dev_set_unique() uses a format string to define the unique name of a
device.  This feature is not used as currently all the calls to this
function either use "%s" as a format string or directly use
dev_name().

Even though this second kind of call does not introduce security
problems, because there cannot be "%" characters in dev_name() results,
gcc issues a warning when building with -Wformat-security flag
("warning: format string is not a string literal (potentially
insecure)").  This warning is useful to find real bugs like the one
fixed by commit 3958b79266b1 ("configfs: fix kernel infoleak through
user-controlled format string").  False positives which do not bring
an extra value make the work of finding real bugs harder.

Therefore remove the format-string feature from drm_dev_set_unique().

Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1449829228-4425-1-git-send-email-nicolas.iooss_linux@m4x.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/vmwgfx: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/vmwgfx/vmwgfx.ko:
-.text                       132244
+.text                       132240
-.rodata                      18296
+.rodata                      18680
-.data                         5096
+.data                         4712

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-28-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/udl: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/udl/udl.ko:
-.text                       11336
+.text                       11332
-.rodata                       560
+.rodata                       684
-.data                         696
+.data                         572

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-27-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/tegra: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/tegra/tegra-drm.ko:
-.rodata                     13672
+.rodata                     13684
-.data                        1108
+.data                        1096

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-26-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/rockchip: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.ko:
-.rodata                      772
+.rodata                      828
-.data                        148
+.data                         92

 drivers/gpu/drm/rockchip/rockchipdrm.ko:
-.rodata                      748
+.rodata                      760
-.data                        448
+.data                        436

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-25-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/nouveau: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/nouveau/nouveau.ko:
-.rodata                      105688
+.rodata                      105792
-.data                        125724
+.data                        125620

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-24-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/mgag200: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/mgag200/mgag200.ko:
-.text                       29244
+.text                       29232
-.rodata                       600
+.rodata                       668
-.data                         688
+.data                         620

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-23-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/imx: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/imx/imxdrm.ko:
-.rodata                      624
+.rodata                      652
-.data                        372
+.data                        344

 drivers/gpu/drm/imx/imx-ipuv3-crtc.ko:
-.rodata                      224
+.rodata                      280
-.data                        184
+.data                        128

 drivers/gpu/drm/imx/imx-ldb.ko:
-.rodata                      660
+.rodata                      784
-.data                        240
+.data                        116

 drivers/gpu/drm/imx/imx-tve.ko:
-.rodata                      400
+.rodata                      524
-.data                        416
+.data                        292

 drivers/gpu/drm/imx/parallel-display.ko:
-.rodata                      400
+.rodata                      524
-.data                        216
+.data                         92

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-22-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/i2c/sil164: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/i2c/sil164.ko:
-.text                       1660
+.text                       1656
-.rodata                       56
+.rodata                      104
-.data                        212
+.data                        164

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-21-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/i2c/adv7511: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/i2c/adv7511.ko:
-.rodata                     1368
+.rodata                     1416
-.data                        164
+.data                        116

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-20-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/exynos: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/exynos/exynosdrm.ko:
-.text                       125792
+.text                       125788
-.rodata                      10972
+.rodata                      11748
-.data                         6720
+.data                         5944

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-19-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/cirrus: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/cirrus/cirrus.ko:
-.text                       10104
+.text                       10092
-.rodata                       528
+.rodata                       596
-.data                         608
+.data                         540

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-18-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/i2c/ch7006: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/i2c/ch7006.ko:
-.text                        5752
+.text                        5760
-.rodata                      6608
+.rodata                      6656
-.data                         216
+.data                         168

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-17-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/bridge/nxp-ptn3460: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/bridge/nxp-ptn3460.ko:
-.rodata                      440
+.rodata                      536
-.data                        208
+.data                        112

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-16-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/bridge/dw_hdmi: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/bridge/dw_hdmi.ko:
-.rodata                      120
+.rodata                      216
-.data                         96
+.data                          0

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-15-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/bochs: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

 drivers/gpu/drm/bochs/bochs-drm.ko:
-.text                        7608
+.text                        7600
-.rodata                       648
+.rodata                       716
-.data                         612
+.data                         544

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-14-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/atmel-hlcdc: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

drivers/gpu/drm/atmel-hlcdc/atmel-hlcdc-dc.ko:
-.text                       12488
+.text                       12480
-.rodata                      1696
+.rodata                      1760
-.data                         776
+.data                         712

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-13-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/armada: Constify function pointer structs

Moves a bunch of junk to .rodata from .data.

drivers/gpu/drm/armada/armada.ko:
-.rodata                      1040
+.rodata                      1100
-.data                        1156
+.data                        1096

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-12-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm: Constify drm_encoder_slave_funcs

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-11-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm: atmel-hlcdc: Fix module autoload for OF platform driver

This platform driver has a OF device ID table but the OF module
alias information is not created so module autoloading won't work.

Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-29-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm: atmel-hlcdc: add support for sama5d2 SoCs

As the hardware description for this chip is the same as the sama5d4, we use
this SoC structures for layers and DC descriptions. Thus only 2 lines are added
to the atmel_hlcdc_of_match table.
The compatible string is already documented in the parent MFD driver's binding.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-10-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/qxl: use to_qxl_bo macro

Instead of using container_of directly use to_qxl_bo macro.

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-9-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/vmwgfx: check kmalloc return value

srf->sizes has been allocated and checked a few lines above; fix up
the copy-pasto so that we check srf->offsets.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-8-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/vmwgfx: use kzalloc in vmw_surface_define_ioctl()

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-7-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/omap: use kzalloc in sita_init()

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-6-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/imx: Drop pipe field from struct imx_drm_crtc

Use the drm_crtc_index() helper to determine the pipe number of the CRTC
instead.

Cc: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-5-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/imx: Make pipe number unsigned

There's no reason whatsoever why this should ever be negative. The same
goes for the number of pipes added to the DRM device.

Cc: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-4-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/bochs: Store correct CRTC index in events

Previously a negative pipe caused a special case to be triggered for
drivers that didn't have proper VBLANK support. The trigger for this
special case is now independent of the pipe, so the correct CRTC index
can now be stored in events.

v2: convert to use drm_crtc_send_vblank_event()

Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-3-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/gma500: Sanity-check pipe index

If the DSI output isn't connected, then mdfld_dsi_encoder_get_pipe()
will return -1. The mdfld_dsi_dp_mode_set() function doesn't properly
check for this condition and causes the following compiler warnings:

  CC      drivers/gpu/drm/gma500/mdfld_dsi_dpi.o
drivers/gpu/drm/gma500/mdfld_dsi_dpi.c: In function ‘mdfld_dsi_dpi_mode_set’:
drivers/gpu/drm/gma500/mdfld_dsi_dpi.c:828:35: warning: array subscript is below array bounds [-Warray-bounds]
  u32 pipeconf = dev_priv->pipeconf[pipe];
                                   ^
drivers/gpu/drm/gma500/mdfld_dsi_dpi.c:829:33: warning: array subscript is below array bounds [-Warray-bounds]
  u32 dspcntr = dev_priv->dspcntr[pipe];
                                 ^

Fix this by checking for a valid pipe before indexing the pipeconf and
dspcntr arrays.

Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-2-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm: Use the driver's gem_object_free function from CMA helpers.

VC4 wraps the CMA objects in its own structures, so it needs to do its
own teardown (waiting for GPU to finish, updating bo_stats tracking).
The other CMA drivers are using drm_gem_cma_free_object as their
gem_free_object, so this should be a no-op for them.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/dp/mst: save vcpi with payloads

This makes it possibly for drivers to find the associated
mst_port by looking at the payload allocation table.

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1449514552-10236-3-git-send-email-harry.wentland@amd.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm/dp/mst: reply with ACK for UP reqs

Currently we reply with NACK to UP requests which might
confuse receivers. We haven't seen any actual issues with
this but should still respond to UP requests correctly.

Signed-off-by: Mykola Lysenko <Mykola.Lysenko@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1449514552-10236-2-git-send-email-harry.wentland@amd.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drm: Move more framebuffer doc from docbook to kerneldoc

I missed a few paragraphs in the docbook that need to be pulled into
the fbdev vfunc docs.

v2: Spelling fixes from Thierry.

Cc: Thierry Reding <treding@nvidia.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1449564561-3896-3-git-send-email-daniel.vetter@ffwll.ch
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

drm/atomic-helper: Drop unneeded argument from check_pending_encoder

Just a remnant from an old iteration of this patch that I've forgotten
to remove: We only need the encoder to figure out whether it has been
reassigned in this update already or not to figure out whether there's
a conflict or not.

Reported-by: Thierry Reding <thierry.reding@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1449564561-3896-2-git-send-email-daniel.vetter@ffwll.ch
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

drm/doc: Convert to markdown

DRM Docbook is now Markdown ready. This means its doc is able to
use markdown text on it.

* Documentation/DocBook/drm.tmpl: Contains a table duplicated from
  drivers/gpu/drm/i915/i915_reg.h. This is not needed anymore

* drivers/gpu/drm/drm_modeset_lock.c: had a code example that used
  to look pretty bad on html. Fixed by using proper code markup.

* drivers/gpu/drm/drm_prime.c: Remove spaces between lines to make
  a proper markup list.

* drivers/gpu/drm/i915/i915_reg.h: Altought pandoc supports tables,
  it doesn't support table cell spanning. But we can use fixed-width
  for those special cases.

* include/drm/drm_vma_manager.h: Another code example that should be
  proper indented with four spaces.

v2 (Daniel): Adjust name to gpu.xml due to rename.

v3 (Daniel):
Split out the actual enabling in the Makefile - this way we can merge
the conversion, while just keeping the enabling in a drm-private tree.

Signed-off-by: Danilo Cesar Lemes de Paula <danilo.cesar@collabora.co.uk> (v1)
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Stephan Mueller <smueller@chronox.de>
Cc: Michal Marek <mmarek@suse.cz>
Cc: linux-kernel@vger.kernel.org
Cc: linux-doc@vger.kernel.org
Cc: intel-gfx <intel-gfx@lists.freedesktop.org>
Cc: dri-devel <dri-devel@lists.freedesktop.org>
Acked-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1448471279-19748-2-git-send-email-daniel.vetter@ffwll.ch

Merge tag 'drm-intel-next-2015-12-04-1' of git://anongit.freedesktop.org/drm-intel into drm-next

This is the "fix igt basic test set issues" edition.
- more PSR fixes from Rodrigo, getting closer
- tons of fifo underrun fixes from Ville
- runtime pm fixes from Imre, Daniel Stone
- fix SDE interrupt handling properly (Jani Nikula)
- hsw/bdw fdi modeset sequence fixes (Ville)
- "don't register bad VGA connectors and fall over" fixes (Ville)
- more fbc fixes from Paulo
- and a grand total of exactly one feature item: Implement dma-buf/fence based
  cross-driver sync in the i915 pageflip path (Alex Goins)

* tag 'drm-intel-next-2015-12-04-1' of git://anongit.freedesktop.org/drm-intel: (70 commits)
  drm/i915: Update DRIVER_DATE to 20151204
  drm/i915/skl: Add SKL GT4 PCI IDs
  Revert "drm/i915: Extend LRC pinning to cover GPU context writeback"
  drm/i915: Correct the Ref clock value for BXT
  drm/i915: Restore skl_gt3 device info
  drm/i915: Fix RPS pointer passed from wait_ioctl to i915_wait_request
  Revert "drm/i915: Remove superfluous NULL check"
  drm/i915: Clean up device info structure definitions
  drm/i915: Remove superfluous NULL check
  drm/i915: Handle cdclk limits on broadwell.
  i915: wait for fence in prepare_plane_fb
  i915: wait for fence in mmio_flip_work_func
  drm/i915: Extend LRC pinning to cover GPU context writeback
  drm/i915/guc: Clean up locks in GuC
  drm/i915: only recompress FBC after flushing a drawing operation
  drm/i915: get rid of FBC {,de}activation messages
  drm/i915: kill fbc.uncompressed_size
  drm/i915: use a single intel_fbc_work struct
  drm/i915: check for FBC planes in the same place as the pipes
  drm/i915: alloc/free the FBC CFB during enable/disable
  ...

drm/ttm: fix documentation of ttm_bo_reserve

Previously, the comment was inconsistent. EDEADLK is what the ww_mutex
mechanism really returns.

Signed-off-by: Nicolai Hähnle <Nicolai.Haehnle@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

Merge tag 'drm-vc4-next-2015-12-11' of github.com/anholt/linux into drm-next

This pull request brings in 3D acceleration support for the VC4 GPU.
While there is still performance work to be done (particularly
surrounding RCL generation), the CL submit ABI should be settled and
done now.

* tag 'drm-vc4-next-2015-12-11' of http://github.com/anholt/linux:
  drm/vc4: Add an interface for capturing the GPU state after a hang.
  drm/vc4: Add support for async pageflips.
  drm/vc4: Add support for drawing 3D frames.
  drm/vc4: Bind and initialize the V3D engine.
  drm/vc4: Fix a typo in a V3D debug register.
  drm/vc4: Add an API for creating GPU shaders in GEM BOs.
  drm/vc4: Add create and map BO ioctls.
  drm/vc4: Add a BO cache.
  drm: Create a driver hook for allocating GEM object structs.

Merge branch 'exynos-drm-next' of git://git./linux/kernel/git/daeinki/drm-exynos into drm-next

- Support runtime pm
  . In case of most ARM SoC, each IP has each power domain which should be
    controlled by each IP driver using runtime pm interface. So this patch
    series makes each IP driver to control its own power domain when
    drm dpms is requested.
- Support of_graph based dt binding for DP panel.
  . This patch series adds of_graph based dt binding for DP panel.
    And also it keeps backward compatibility. This includes dt binding
    patch so I got Acked-by from Krzysztof Kozlowski who is a Exynos
    SoC maintainer and from Rob Herring who is a device tree maintainer.

- Cleanup for Exynos DRM IPP enhancement.
  . This patch series is a first step for enhancing existing IPP framework
    which will integrate existing IPP functions with DRM KMS part so that
    these can be transparent to userspace. For other portion of the patch
    series, we will have more times for the review.]

* 'exynos-drm-next' of git://git.kernel.org:/pub/scm/linux/kernel/git/daeinki/drm-exynos: (29 commits)
  drm/exynos: gem: remove old unused prototypes
  drm/exynos: fimd: fix dma burst size setting for small plane size
  drm/exynos: fix clipping when scaling is enabled
  drm/exynos: mixer: use ratio precalculated in exynos_state
  drm/exynos: add generic check for plane state
  drm/exynos: introduce exynos_drm_plane_config structure
  drm/exynos: mixer: enable video overlay plane only when VP is available
  drm/exynos: mixer: use crtc->state->adjusted_mode instead of crtc->mode
  drm/exynos: introduce exynos_drm_plane_state structure
  drm/exynos: move dma_addr attribute from exynos plane to exynos fb
  drm/exynos: exynos7-decon: remove excessive check
  drm/exynos: rotator: convert to common clock framework
  drm/exynos: gsc: add device tree support and remove usage of static mappings
  drm/exynos: gsc: fix wrong pm_runtime state
  drm/exynos: gsc: prepare and unprepare gsc clock
  ARM: dts: Use OF graph for DP to panel connection in exynos5800-peach-pi
  dt-bindings: exynos-dp: update ports node binding for panel
  drm/exynos: dp: add of_graph dt binding support for panel
  drm/exynos: decon: remove unused variables
  drm/exynos: dsi: modify a error type when getting a node failed
  ...

Merge tag 'topic/drm-misc-2015-12-14' of git://anongit.freedesktop.org/drm-intel into drm-next

Last (very likely at least) drm-misc pull for 4.5. 3 big things:
- piles of docs for kms vtables.
- drm.debug dmesg output prettification from Ville (i915 parts are for 4.6
  I think)
- connector mode probing/validating/merging cleanup from Ville.

[airlied : fix drm_encoder_init conflict.]

* tag 'topic/drm-misc-2015-12-14' of git://anongit.freedesktop.org/drm-intel: (43 commits)
  drm: modes: Revert cc344980c767 "replace simple_strtoul by kstrtouint"
  drm: Expand the drm_helper_probe_single_connector_modes() docs
  drm: Allow override_edid to override the firmware EDID
  drm/sti: Drop bogus drm_mode_sort() call
  drm: Drop drm_helper_probe_single_connector_modes_nomerge()
  drm: Only merge mode type bits between new probed modes
  drm: Flatten drm_mode_connector_list_update() a bit
  drm: Rename MODE_UNVERIFIED to MODE_STALE
  drm: Don't overwrite UNVERFIED mode status to OK
  drm: Add plane->name and use it in debug prints
  drm: Add crtc->name and use it in debug messages
  drm: Use driver specified encoder name
  drm: Pass 'name' to drm_encoder_init()
  drm: Pass 'name' to drm_universal_plane_init()
  drm: Pass 'name' to drm_crtc_init_with_planes()
  drm: Documentation style guide
  drm: Document drm_encoder/crtc_helper_funcs
  drm: Move drm_display_mode an related docs into kerneldoc
  drm/atomic-helper: Mention the new system/resume helpers the docs
  drm: Document drm_connector_helper_funcs
  ...

Merge branch 'msm-next' of git://people.freedesktop.org/~robclark/linux into drm-next

Main thing this time around is DSI support for msm8960/apq8064, which
should be helpful for getting an upstream kernel working on
nexus7/nexus4/etc.

* 'msm-next' of git://people.freedesktop.org/~robclark/linux: (29 commits)
  drm/msm/mdp: fix a problematic usage of WARN_ON()
  drm/msm/dsi: Added missing mutex_unlock
  drm/msm: ratelimit error irq msgs
  drm/msm: Use unlocked gem unreferencing
  drm/msm: trivial whitespace fix
  dt-bindings: msm/dsi: Add DSIv2 documentation
  dt-bindings: msm/dsi: Fix the order in which clocks are listed
  drm/msm/dsi: Enable MMSS SPFB port via syscon
  drm/msm/dsi: Don't use iommu for command TX buffer for DSIv2
  drm/msm/dsi: Add dsi_cfg for APQ8064
  drm/msm/dsi: Set up link clocks for DSIv2
  drm/msm/dsi: Parse bus clocks from a list
  drm/msm/dsi: Delay dsi_clk_init
  drm/msm/dsi: Use a better way to figure out DSI version
  drm/msm/dsi: Add DSI PLL for 28nm 8960 PHY
  drm/msm/dsi: Add support for 28nm PHY on 8960
  drm/msm/dsi: Don't get byte/pixel source clocks from DT
  drm/msm/mdp4: Initialize DSI encoders
  drm/msm/mdp4: Call custom round_pixclk helper only if the encoder type is TMDS
  drm/msm/dsi: Add a mdp4 encoder for DSI
  ...

drm/msm/mdp: fix a problematic usage of WARN_ON()

WARN_ON() takes a condition rather than a format string. This patch
converted WARN_ON() to WARN() instead.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/dsi: Added missing mutex_unlock

in case of failed to get iova, function was returning without releasing
the mutex. Added it.

Signed-off-by: Saurabh Sengar <saurabh.truth@gmail.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm: ratelimit error irq msgs

When things go bad and don't recover, we can be getting an err irq every
vblank.

Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm: Use unlocked gem unreferencing

For drm_gem_object_unreference callers are required to hold
dev->struct_mutex, which these paths don't. Enforcing this requirement
has become a bit more strict with

commit ef4c6270bf2867e2f8032e9614d1a8cfc6c71663
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Oct 15 09:36:25 2015 +0200

    drm/gem: Check locking in drm_gem_object_unreference

Cc: Rob Clark <robdclark@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm: trivial whitespace fix

Signed-off-by: Rob Clark <robdclark@gmail.com>

dt-bindings: msm/dsi: Add DSIv2 documentation

Add additional property info needed for DSIv2 DT.

Cc: devicetree@vger.kernel.org
Cc: Rob Herring <robh@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

dt-bindings: msm/dsi: Fix the order in which clocks are listed

List the clocks in the order that's used in DT. We don't have mdp/dsi
DT nodes for any SoC in upstream yet, but we align with the order
we intend to use.

Cc: devicetree@vger.kernel.org
Cc: Rob Herring <robh@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/dsi: Enable MMSS SPFB port via syscon

For DSIv2 to work, we need to enable MMSS_AHB_ARB_MASTER_PORT in
MMSS_SFPB. We enable the required bitfield by retrieving MMSS_SFPB
regmap pointer via syscon.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/dsi: Don't use iommu for command TX buffer for DSIv2

We currently use iommu allocated DMA buffers for sending DSI commands.
DSIv2 doesn't have a port connected to the MDP iommu. Therefore, it
can't use iommu allocated buffers to fetch DSI commands.

Use a regular contiguous DMA buffer if we are DSIv2.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/dsi: Add dsi_cfg for APQ8064

Add a dsi_cfg entry for APQ8064. Since this is the first DSIv2 chip to
be supported, add a list of bus clocks that are required by the DSIv2
block.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/dsi: Set up link clocks for DSIv2

DSIv2 (DSI on older A family chips) has slightly different link clock
requirements.

First, we have an extra clock called src_clk (with a dedicated RCG).
This is required by the DSI controller to process the pixel data
coming from MDP. It needs to be set at the rate "pclk * bytes_per_pixel".

We also need to explicitly configure esc_clk. On DSI6G chips, we don't
need to set a rate to esc_clk because its RCG is always sourced from
crystal clock (19.2 Mhz in all cases), which is within the escape clock
frequency range in the mipi DSI spec. For chips with DSIv2, the crystal
clock rate may not be within the required range (27Mhz on APQ8064).
Therefore, we derive it from the DSI byte clock. We calculate an esc_clck
rate that is within the mipi spec and also divisible by the byte clock
rate.

When setting rate and enabling the link clocks, we make sure that byte_clk
is configured before esc_clk, and src_clk before pixel_clk. We create two
different link_enable funcs for DSI6G and DSIv2 since the sequences are
different.

We also obtain two extra source clocks (dsi_src_clk and esc_src_clk) and
set their parent to the clocks provided by DSI PLL.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/dsi: Parse bus clocks from a list

DSI bus clocks seem to vary between different DSI host versions, and the
SOC to which they belong. Even the enable/disable sequence varies.

Provide a list of bus clock names in dsi_cfg. The driver will use this to
retrieve the clocks, and enable/disable them.

Add bus clock lists for DSI6G, and DSI for MSM8916(this is DSI6G too, but
there is no MMSS_CC specific clock since there is no MMSS clock controller
on 8916).

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/dsi: Delay dsi_clk_init

Initialize clocks only after we get the DSI host version. This will allow
us to get clocks using a pre-defined list based on the DSI major/minor
version of the host. This is required since clock requirements of
different major DSI revisions(v2 vs 6g) aren't the same.

Modify dsi_get_version to get the interface clock, and then put it after
it is used.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/dsi: Use a better way to figure out DSI version

The current version checking mechanism works fine for DSI6G blocks. It
doesn't work so well for older generation DSIv2 blocks.

The initial read of REG_DSI_6G_HW_VERSION(offset 0x0) would result in a
read of REG_DSI_CTRL for DSIv2. This register won't necessarily be 0 on
DSIv2. It can be non zero if DSI was previously initialized by the
bootloader.

Instead of reading offset 0x0, we now read offset 0x1f0. For DSIv2, this
register is DSI_VERSION, and is bound to be non-zero. On DSI6G, this
register(offset 0x1f0) is SCRATCH_REGISTER_0, which no one ever seems to
touch, and from all register dumps I'vc seen, holds 0 all the time.

Modify dsi_get_version to read REG_DSI_VERSION to determine whether we
are DSI6G or DSIv2.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/dsi: Add DSI PLL for 28nm 8960 PHY

Add DSI PLL common clock framework clocks for 8960 PHY.

The PLL here is different from the ones found in B family msm chips. As
before, the DSI provides two clocks to the outside world. dsixpll and
dsixpllbyte (x = 1, 2). dsixpll is a regular clock divider, but
dsixpllbyte is modelled as a custom clock divider.

dsixpllbyte is the starting point of the PLL configuration. It is the
one that sets up the VCO clock rate. We need the VCO clock rate in the
form: F * byteclk, where F is a multiplication factor that varies on
the byte clock the DSI driver is trying to set. We use the custom
clk_ops for dsixpllbyte to ensure that the parent (VCO) is set at this
rate.

An additional divider (POSTDIV1) generates the bitclk. Since bit clock
can be derived from byteclock, we calculate it internally, and don't
expose it as a clock.

Cc: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/dsi: Add support for 28nm PHY on 8960

DSI PHY on MSM8960 and APQ8064 is a 28nm PHY that's different from the
supported 28nm LP PHY found in newer chips.

Add support for the new PHY.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/dsi: Don't get byte/pixel source clocks from DT

We retrieve the byte and pixel source clocks (RCG clocks) in the dsi
driver via DT. These are needed so that we can re-parent these source
clocks if we want to drive it using a different DSI PLL.

We shouldn't get these via DT because they aren't clocks that directly
serve as inputs to the dsi host.

Fortunately, there is a static parent-child link between the
byte_clk_src/pixel_clk_src and byte_clk/pixel_clk clocks. So, we can
retrieve the source clocks via clk_get_parent.

Do this instead of retrieving via DT.

Cc: Rob Herring <robh@kernel.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/mdp4: Initialize DSI encoders

Create DSI encoders during modeset_init. The 2 encoders should ideally be
one command mode and one video mode DSI encoder respectively, but we don't
support command mode yet. We just create 2 of the same because the dsi
driver expects it, we end up using only the first one.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/mdp4: Call custom round_pixclk helper only if the encoder type is TMDS

The mdp_kms round_pixclk op creates problems when we have more
interfaces in use. It calls the DTV encoder's helper by default.

Check on encoder type and call the corresponding encoder's
func meant for rounding pixel clock. DSI and LVDS don't require
rounding, so just return rate in their case.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/dsi: Add a mdp4 encoder for DSI

Create an mdp4 incoder for DSI. Only DSI video mode is supported as of
now.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Vinay Simha BN <vinaysimha@inforcecomputing.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/mdp4: Initialize LCDC encoder even if panel driver isn't available

Currently, the driver defers if it doesn't find a drm_panel. This forces
us to have a drm_panel, if not, the driver isn't usable.

Make the lcdc encoder initialization independent of the availability of
the drm panel. We only check if there is a panel node specified in DT. If
it isn't, then we don't initialize the encoder at all. The panel node is
passed to the lcdc encoder and lvds connector drivers.

The connector driver takes the responsibility to retrieve the drm_panel
from the panel node, and update the status on whether the panel is
connected or not. This makes the panel usable even if the drm_panel
driver is inserted as a module later on.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/mdp4: Clean up modeset_init

modeset_init() for mdp4 isn't very flexible. That makes it hard to add
more interfaces.

Split out the encoder/connector creation code in modeset_init into a
separate function. This is similar to what's done in modeset_init for
mdp5.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/adreno: Remove CONFIG_OF checks

Remove CONFIG_OF checks in adreno_device.c. The downstream bus scaling
stuff is included only when CONFIG_OF is not set. So, remove that too.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/hdmi: remove CONFIG_OF checks

We now only care about kernels that support DT. Remote the non-DT stuff.
While we're at it, use of_device_get_match_data to retrieve match data.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/mdp: Remove CONFIG_OF checks from MDP drivers

We don't intend to use downstream non-DT kernels anymore, so remove
CONFIG_OF checks.

Update the TODO comment so that we don't forget about max_clk setting
for non APQ8064 chips having MDP4.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

dt-bindings: drm/msm: Update MDP bindings

Update DT bindings for mdp. We now have a more uniform and future-proof
set of compatible strings.

MDP5 bindings were missing. Add those and update details on the
clock-names properties.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm: Update compatible strings for mdp

Create distinct compatible strings for mdp4 and mdp5. Keep "qcom,mdss_mdp"
as is to support downstream kernels.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm: Remove non-DT code in msm_drv

Support for non-DT kernels was mainly to use v3.4 downstream kernels.
This is no longer a priority now as we have reasonable support upstream.

Remove CONFIG_OF from the top level msm_drv.c file. While we're at it,
clean up the data matching process using of_device_get_match_data.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/msm/mdp5: high precision vblank timestamp support

MDP5 has line count and frame count registers for each interface. Enable
these counters and use them to implement the get_vblank_timestamp drm
driver op.

The line counter starts with the value 1 at the beginning of the VSYNC
pulse and ends with value VTOTAL at the end of VFP. This value is used
to determine whether we're in blanking period or not, and an adjusted
value of this counter is used to get vpos as expected by
get_scanout_position. Since there is no way to calculate hpos, we always
set it to 0.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drm/exynos: gem: remove old unused prototypes

This patch removes old, unused function prototypes from exynos_drm_gem.h.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drm/exynos: fimd: fix dma burst size setting for small plane size

This patch fixes trashed display of buffers cropped to very small width.
Even if DMA is unstable and causes tearing when changing the burst size,
it is still better than displaying a garbage.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drm/exynos: fix clipping when scaling is enabled

This patch fixes calculation of src x/y offset for negative crtc x/y
values when scaling is enabled. This fixes possible IOMMU fault when
scaling is enabled.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drm/exynos: mixer: use ratio precalculated in exynos_state

Common plane code already calculates and checks for supported scalling
modes, so additional code in mixer driver can be now removed.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drm/exynos: add generic check for plane state

This patch adds generic check for plane state - display area dimensions,
so drivers can always assume that they get valid plane state to set.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drm/exynos: introduce exynos_drm_plane_config structure

This patch adds common structure for keeping plane configuration and
capabilities data. This patch is inspired by similar code developed by
Tobias Jakobi.

Changelog v2:
- fix vidi_win_types(i) call. vidi_win_types is not a function.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drm/exynos: mixer: enable video overlay plane only when VP is available

Video overlay plane should be registered only when suitable hardware
sub-block (Video Processor) is available.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drm/exynos: mixer: use crtc->state->adjusted_mode instead of crtc->mode

This patch replaces usage of crtc->mode with crtc->state->adjusted_mode
like it is already done in common plane code.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drm/exynos: introduce exynos_drm_plane_state structure

This patch introduces exynos_drm_plane_state structure, which subclasses
drm_plane_state and holds precalculated data suitable for configuring
Exynos hardware.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>