I spotted a markup issue, plus adding the descriptions in drm_driver.
Plus a few more links while at it.

I'm still mildly unhappy with the split between fops and ioctls, but I
still think having the ioctls in the uapi chapter makes more sense. Oh
well ...

v2: Rebase.

v3: Move misplace hunk to the right patch.

Cc: Stefan Agner <stefan@agner.ch>
Acked-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170531092045.3950-1-daniel.vetter@ffwll.ch

The magic switching between proper pci driver and shadow-attach isn't
useful anymore since there's no ums+kms drivers left. Let's split this
up properly, calling pci_register_driver for kms drivers and renaming
the shadow-attach init to drm_legacy_pci_init/exit.
Acked-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170524145212.27837-6-daniel.vetter@ffwll.ch

The only special-case is pci devices, and we can easily handle this in
the core. Do so and drop a pile of boilerplate from drivers.
Acked-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170524145212.27837-5-daniel.vetter@ffwll.ch

Since

commit ca8e2ad7
Author: Thierry Reding <treding@nvidia.com>
Date:   Fri Apr 11 15:23:00 2014 +0200

    drm: Introduce drm_dev_set_unique()

the ->set_busid callback is optional. On top of that the udl one isn't
really fully compliant with the drm uabi, but since only modesetting
ever binds to it (there's no 3d accel on udl) it doesn't matter.

Still, can't harm to aling and use the default used by everyone else.
Acked-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170524145212.27837-4-daniel.vetter@ffwll.ch

We use drm_crtc_ for all the new-style vblank functions which directly
take a struct drm_crtc *. drm_accurate_vblank_count was the odd one
out, correct this to appease my OCD.
Acked-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170524145212.27837-13-daniel.vetter@ffwll.ch

I alwasy get confused about drm_wait_vblank for a split second until I
realize it's the ioctl handler. Unconfuse me, and do it for the legacy
modeset vblank control ioctl too.

While at it also noticed that I misplaced the irq ioctl handler in the
internal header file.
Acked-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170524145212.27837-12-daniel.vetter@ffwll.ch

Unify and review everything, plus make sure it's all correct markup.
Drop the kernel-doc for internal functions. Also rework the overview
section, it's become rather outdated.

Unfortuantely the kernel-doc in drm_driver isn't rendered yet, but
that will change as soon as drm_driver is kernel-docified properly.

Also document properly that drm_vblank_cleanup is optional, the core
calls this already.

v2: Make it clear that cleanup happens in drm_dev_fini for drivers
with their own ->release callback (Thierry).
Acked-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170524145212.27837-11-daniel.vetter@ffwll.ch

Again, doesn't seem to serve a purpose.

Cc: Thierry Reding <thierry.reding@gmail.com>
Acked-by: NThierry Reding <thierry.reding@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170524145212.27837-34-daniel.vetter@ffwll.ch

Seems entirely cargo-culted.

Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Cc: Vincent Abriou <vincent.abriou@st.com>
Acked-by: NVincent Abriou <vincent.abriou@st.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170524145212.27837-31-daniel.vetter@ffwll.ch

The VC4 KMS driver is implementing its own ->atomic_commit() but there
are a few generic helpers we can use instead of open-coding the logic.
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: NEric Anholt <eric@anholt.net>
Link: http://patchwork.freedesktop.org/patch/msgid/1496392332-8722-4-git-send-email-boris.brezillon@free-electrons.com

This allows mesa to set the tiling format for a BO and have that
tiling format be respected by mesa on the other side of an
import/export (and by vc4 scanout in the kernel), without defining a
protocol to pass the tiling through userspace.
Signed-off-by: NEric Anholt <eric@anholt.net>
Link: http://patchwork.freedesktop.org/patch/msgid/20170608001336.12842-2-eric@anholt.netAcked-by: NDave Airlie <airlied@redhat.com>

The T tiling format is what V3D uses for textures, with no raster
support at all until later revisions of the hardware (and always at a
large 3D performance penalty).  If we can't scan out V3D's format,
then we often need to do a relayout at some stage of the pipeline,
either right before texturing from the scanout buffer (common in X11
without a compositor) or between a tiled screen buffer right before
scanout (an option I've considered in trying to resolve this
inconsistency, but which means needing to use the dirty fb ioctl and
having some update policy).

T-format scanout lets us avoid either of those shadow copies, for a
massive, obvious performance improvement to X11 window dragging
without a compositor.  Unfortunately, enabling a compositor to work
around the discrepancy has turned out to be too costly in memory
consumption for the Raspbian distribution.

Because the HVS operates a scanline at a time, compositing from T does
increase the memory bandwidth cost of scanout.  On my 1920x1080@32bpp
display on a RPi3, we go from about 15% of system memory bandwidth
with linear to about 20% with tiled.  However, for X11 this still ends
up being a huge performance win in active usage.

This patch doesn't yet handle src_x/src_y offsetting within the tiled
buffer.  However, we fail to do so for untiled buffers already.
Signed-off-by: NEric Anholt <eric@anholt.net>
Link: http://patchwork.freedesktop.org/patch/msgid/20170608001336.12842-1-eric@anholt.netReviewed-by: NBoris Brezillon <boris.brezillon@free-electrons.com>

Smaller scope reduces visibility of variable and makes usage of
uninitialized variable less possible.

Changes in v2:
	- separate declaration and initialization
Changes in v3:
	- add missing signed-off-by tag
Signed-off-by: NDawid Kurek <dawikur@gmail.com>
Signed-off-by: NSean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170615174556.GA8872@gmail.com

According to the eLCDIF initialization steps listed in the MX6SX
Reference Manual the eLCDIF block reset is mandatory.

Without performing the eLCDIF reset the display shows garbage content
when the kernel boots.

In earlier tests this issue has not been observed because the bootloader
was previously showing a splash screen and the bootloader display driver
does properly implement the eLCDIF reset.

Add the eLCDIF reset to the driver, so that it can operate correctly
independently of the bootloader.

Tested on a imx6sx-sdb board.

Cc: <stable@vger.kernel.org>
Signed-off-by: NFabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: NMarek Vasut <marex@denx.de>
Signed-off-by: NSean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1494007301-14535-1-git-send-email-fabio.estevam@nxp.com

This patch supports TM2e panel and the panel has 1600x2560 resolution
in 5.65" physical.

This identify panel type with compatibility string, also invoke
display mode that matches the type. So add the check code for s6e3ha2
compatibility and s6e3hf2 type and select the drm_display_mode of
default and edge type.
Signed-off-by: NHoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: NAndrzej Hajda <a.hajda@samsung.com>
Reviewed-by: NInki Dae <inki.dae@samsung.com>
[treding@nvidia.com: fixup checkpatch warnings]
Signed-off-by: NThierry Reding <treding@nvidia.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1492504836-19225-3-git-send-email-hoegeun.kwon@samsung.com

Without the dependency, we run into a link error:

drivers/gpu/drm/panel/panel-sitronix-st7789v.o: In function `st7789v_probe':
panel-sitronix-st7789v.c:(.text.st7789v_probe+0xc0): undefined reference to `of_find_backlight_by_node'

Fixes: 7142afb3 ("drm/panel: Add driver for sitronix ST7789V LCD controller")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Reviewed-by: NHoegeun Kwon <hoegeun.kwon@samsung.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170419180326.303994-1-arnd@arndb.de

The new S6E3HA2 driver fails to link when backlight is disabled:

ERROR: "backlight_device_register" [drivers/gpu/drm/panel/panel-samsung-s6e3ha2.ko] undefined!
ERROR: "backlight_device_unregister" [drivers/gpu/drm/panel/panel-samsung-s6e3ha2.ko] undefined!

This adds a Kconfig dependency like we have it for some other panel drivers.

Fixes: ed29f942 ("drm/panel: Add support for S6E3HA2 panel driver on TM2 board")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Reviewed-by: NHoegeun Kwon <hoegeun.kwon@samsung.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170419175939.189098-2-arnd@arndb.de

This adds support for the AU Optronics Corporation 31.5"
FHD (1920x1080) LVDS TFT LCD panel, which can be supported
by the simple panel driver
Signed-off-by: NLucas Stach <l.stach@pengutronix.de>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NThierry Reding <treding@nvidia.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170608180758.31020-4-l.stach@pengutronix.de

This adds support for the NLT Technologies NL192108AC18-02D
15.6" LVDS FullHD TFT LCD panel, which can be supported
by the simple panel driver.

Timings are taken from the preliminary datasheet, as a final
one is not yet available.
Signed-off-by: NLucas Stach <l.stach@pengutronix.de>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NThierry Reding <treding@nvidia.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170608180758.31020-3-l.stach@pengutronix.de

This adds support for the NEC LCD Technologies, Ltd. 12.1"
WXGA (1280x800) LVDS TFT LCD panel, which can be supported
by the simple panel driver.
Signed-off-by: NLucas Stach <l.stach@pengutronix.de>
Signed-off-by: NThierry Reding <treding@nvidia.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170608180758.31020-1-l.stach@pengutronix.de

Support Innolux P079ZCA 7.85" 768x1024 TFT LCD panel, it is a MIPI DSI
panel.
Signed-off-by: NChris Zhong <zyw@rock-chips.com>
Reviewed-by: NSean Paul <seanpaul@chromium.org>
Tested-by: NBrian Norris <briannorris@chromium.org>
Signed-off-by: NThierry Reding <treding@nvidia.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1490316692-20506-2-git-send-email-zyw@rock-chips.com

If one 'drm_gem_handle_create()' fails, we leak somes handles and some
memory.

In order to fix it:
  - move the 'free(bo_state)' at the end of the function so that it is also
    called in the eror handling path. This has the side effect to also try
    to free it if the first 'kcalloc' fails. This is harmless.
  - add a new label, err_delete_handle, in order to delete already
    allocated handles in error handling path
  - remove the now useless 'err' label

The way the code is now written will also delete the handles if the
'copy_to_user()' call fails.
Signed-off-by: NChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: NEric Anholt <eric@anholt.net>
Link: http://patchwork.freedesktop.org/patch/msgid/20170512123803.1886-1-christophe.jaillet@wanadoo.fr

The bo->resv pointer could be NULL, leading to kernel oopses
like the one below.

This patch ensures that bo->resv is always set in vc4_create_object
ensuring that it is never NULL.

Thanks to Eric Anholt for pointing to the correct solution.

[   19.738487] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[   19.746805] pgd = ffff8000275fc000
[   19.750319] [00000000] *pgd=0000000000000000
[   19.754715] Internal error: Oops: 96000004 [#1] PREEMPT SMP
[   19.760369] Modules linked in: smsc95xx usbnet vc4 drm_kms_helper drm pwm_bcm2835 i2c_bcm2835 bcm2835_rng rng_core bcm2835_dma virt_dma
[   19.772767] CPU: 0 PID: 1297 Comm: Xorg Not tainted 4.12.0-rc1-rpi3 #58
[   19.779476] Hardware name: Raspberry Pi 3 Model B (DT)
[   19.784688] task: ffff800028268000 task.stack: ffff800026c08000
[   19.790705] PC is at ww_mutex_lock_interruptible+0x14/0xc0
[   19.796329] LR is at vc4_submit_cl_ioctl+0x4fc/0x998 [vc4]
...
[   20.240855] [<ffff0000088975f4>] ww_mutex_lock_interruptible+0x14/0xc0
[   20.247528] [<ffff0000009b3ea4>] vc4_submit_cl_ioctl+0x4fc/0x998 [vc4]
[   20.254372] [<ffff0000008f75f8>] drm_ioctl+0x180/0x438 [drm]
[   20.260120] [<ffff00000821383c>] do_vfs_ioctl+0xa4/0x7d0
[   20.265510] [<ffff000008213fe4>] SyS_ioctl+0x7c/0x98
[   20.270550] [<ffff000008082f30>] el0_svc_naked+0x24/0x28
[   20.275941] Code: d2800002 d5384103 910003fd f9800011 (c85ffc04)
[   20.282527] ---[ end trace 1f6bd640ff32ae12 ]---
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: NEric Anholt <eric@anholt.net>
Link: http://patchwork.freedesktop.org/patch/msgid/14e68768-6c92-2d74-92fd-196dbc50d8f7@xs4all.nl

If src_x/y were nonzero, we failed to shift them down by 16 to get the
pixel offset.  The recent CMA helper function gets it right.
Signed-off-by: NEric Anholt <eric@anholt.net>
Fixes: bed41005 ("drm/pl111: Initial drm/kms driver for pl111")
Reported-by: NMircea Carausu <mircea.carausu@broadcom.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170603015733.13266-1-eric@anholt.netReviewed-by: NSean Paul <seanpaul@chromium.org>

Attach the panel-bridge created by drm_panel_bridge_add() to the
parallel RGB encoder.

Fixes: 96160a80 ("drm/atmel-hlcdc: Replace the panel usage with drm_panel_bridge.")
Reviewed-by: NEric Anholt <eric@anholt.net>
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NArchit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1496748866-17165-1-git-send-email-boris.brezillon@free-electrons.com

This fixes the following depmod error when building drm as a module:
depmod: ERROR: Found 6 modules in dependency cycles!
depmod: ERROR: Cycle detected: drm -> drm_kms_helper -> drm

Fixes: 13dfc054 ("drm/bridge: Refactor out the panel wrapper from the lvds-encoder bridge.")
Tested-by: NLofstedt, Marta <marta.lofstedt@intel.com>
Reviewed-by: NEric Anholt <eric@anholt.net>
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: NArchit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/3fd262cf-1db6-4335-320c-af92f9014502@linux.intel.com

This cuts 135 lines of boilerplate, at the cost of losing the
filtering of get_modes() using atmel_hlcdc_dc_mode_valid().  The
atomic check will still check that we don't set an invalid mode,
though.
Acked-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NEric Anholt <eric@anholt.net>
Signed-off-by: NArchit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170511183128.25085-7-eric@anholt.net

drm_encoder_cleanup() finishes with memsetting it to 0, already.
Acked-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NEric Anholt <eric@anholt.net>
Signed-off-by: NArchit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170511183128.25085-6-eric@anholt.net

Another 100 lines of boilerplate gone, while allowing for bridges to
be connected in the display chain.
Reviewed-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NEric Anholt <eric@anholt.net>
Signed-off-by: NArchit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170511183128.25085-3-eric@anholt.net

The newer version of the RPi panel driver is going to be a combination
of a bridge and a panel, but we should also support panels without a
bridge, so the panel-bridge layer lets us do that cleanly.

v2: Drop "dev" argument.
Signed-off-by: NEric Anholt <eric@anholt.net>
Acked-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NArchit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170511183128.25085-2-eric@anholt.net

Many DRM drivers have common code to make a stub connector
implementation that wraps a drm_panel.  By wrapping the panel in a DRM
bridge, all of the connector code (including calls during encoder
enable/disable) goes away.

v2: Fix build with CONFIG_DRM=m, drop "dev" argument that should just
    be the panel's dev, move kerneldoc up a level and document
    _remove().
v3: Fix another breakage with CONFIG_DRM=m, fix breakage with
    CONFIG_OF=n, move protos under CONFIG_DRM_PANEL_BRIDGE, wrap a
    line.
Signed-off-by: NEric Anholt <eric@anholt.net>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v1)
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com> (v2)
Acked-by: Archit Taneja <architt@codeaurora.org> (v2)
Signed-off-by: NArchit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170602202514.11900-1-eric@anholt.net

Now that we have a callback to check if bridge supports a given mode
we can use it in Synopsys Designware HDMI bridge so that we restrict
the number of probbed modes to the ones we can actually display.

Also, there is no need to use mode_fixup() callback as mode_valid()
will handle the mode validation.

NOTE: I also had to change the pdata declaration of mode_valid
custom callback so that the passed modes are const. I also changed
in the platforms I found. Not even compiled it though.
Signed-off-by: NJose Abreu <joabreu@synopsys.com>
Acked-by: NNeil Armstrong <narmstrong@baylibre.com>
Acked-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Cc: Carlos Palminha <palminha@synopsys.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Carlo Caione <carlo@caione.org>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Mark Yao <mark.yao@rock-chips.com>
Cc: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: NArchit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/3d8d449e4d13d2535fa292c75f5fa931de4a4fa8.1495720737.git.joabreu@synopsys.com

Use devm_of_platform_populate() to be sure that of_platform_depopulate
is called when removing the driver.
Signed-off-by: NBenjamin Gaignard <benjamin.gaignard@linaro.org>
CC: Shawn Guo <shawnguo@kernel.org>
CC: David Airlie <airlied@linux.ie>
CC: dri-devel@lists.freedesktop.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1496072763-31209-4-git-send-email-benjamin.gaignard@linaro.org

Failing to do so meant that we got a resume() callback on first use of
the device, so we would leak the bin BO that we allocated during
probe.
Signed-off-by: NEric Anholt <eric@anholt.net>
Fixes: 553c942f ("drm/vc4: Allow using more than 256MB of CMA memory.")
Link: http://patchwork.freedesktop.org/patch/msgid/20170515171615.10168-1-eric@anholt.netReviewed-by: NBoris Brezillon <boris.brezillon@free-electrons.com>

Now that we have a callback to check if crtc supports a given mode
we can use it in atmel-hlcdc so that we restrict the number of probbed
modes to the ones we can actually display.

Also, remove the mode_fixup() callback as this is no longer needed
because mode_valid() will be called before.
Signed-off-by: NJose Abreu <joabreu@synopsys.com>
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/95fd6c06c58bd0b957e36a8d7068e6a74b581304.1495720737.git.joabreu@synopsys.com

Only in the load failure path, where the hardware is quiet anyway.

Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170524145212.27837-19-daniel.vetter@ffwll.ch

IRQs are properly shut down, so it almost works as race-free shutdown.
Except the irq is stopped after the vblank stuff, so boom anyway.
Proper way would be to call drm_atomic_helper_shutdown before any of
the kms things gets stopped. So no harm in removing the
drm_vblank_cleanup here really.

Same story for both hdlcd and mali.

v2: Move misplaced malidp hunk to this patch (Liviu).

Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Brian Starkey <brian.starkey@arm.com>
Acked-by: NLiviu Dudau <liviu.dudau@arm.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170524145212.27837-17-daniel.vetter@ffwll.ch

Pull a (much shorter) overview into drm_irq.c, and instead put the
callback documentation into in-line comments in drm_drv.h.

v2: Move the include stanzas back to the split-up patch (Stefan).

Cc: Stefan Agner <stefan@agner.ch>
Reviewed-by: NStefan Agner <stefan@agner.ch>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170531092253.12833-1-daniel.vetter@ffwll.ch

drm_irq.c contains both the irq helper library (optional) and the
vblank support (optional, but part of the modeset uapi, and doesn't
require the use of the irq helpers at all.

Split this up for more clarity of the scope of the individual bits.

v2: Move misplaced hunks to this patch (Stefan).

Cc: Stefan Agner <stefan@agner.ch>
Reviewed-by: NStefan Agner <stefan@agner.ch>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170531092146.12528-1-daniel.vetter@ffwll.ch

Fixes a copy&paste error.
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: NEric Anholt <eric@anholt.net>
Link: http://patchwork.freedesktop.org/patch/msgid/1495550187-525-1-git-send-email-boris.brezillon@free-electrons.com