Nouveau wanted this to avoid some worse conflicts when I merge that.

imx-drm vblank IRQ control, fence support, and of endpoint helpers

- Add and make use of drm_of_active_endpoint helpers
- Silence a noisy dev_info into a dev_dbg
- Stop touching primary fb on pageflips
- Track flip state explicitly
- Keep GEM buffer objects referenced while scanout is active
- Implement fence sync by deferring flips to a workqueue for
  dma-bufs with pending fences
- Actually disable vblank IRQs while they are not needed

* tag 'imx-drm-next-20160301' of git://git.pengutronix.de/git/pza/linux:
  drm/imx: only enable vblank IRQs when needed
  drm/imx: implement fence sync
  drm/imx: keep GEM object referenced as long as scanout is active
  drm/imx: track flip state explicitly
  drm/imx: don't touch primary fb on pageflip
  drm/imx: ipuv3 plane: Replace dev_info with dev_dbg if a plane's CRTC changes
  gpu: ipu-v3: ipu-dc: Simplify display controller microcode setup
  drm/rockchip: remove rockchip_drm_encoder_get_mux_id
  drm/imx: remove imx_drm_encoder_get_mux_id
  drm: add drm_of_encoder_active_endpoint helpers

The vblank IRQ is only needed to trigger page flip work, so we
might as well disable it when there is no work to do.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

If the FB is backed by a GEM object with an dma-buf attached
we need to wait for any pending fences to signal before executing
the page flip.

The implementation is straight forward by deferring the flip to
a workqueue in that case.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

The DRM core only references the currently queued/active framebuffer.
So there is a period of time where the flip is not completed, but
the GEM object backing the FB is already unreferenced and could be
destroyed if userspace closes its handle.

Make sure to keep a reference to the GEM object until the flip is
actually executed clean things up in a worker running behind the
flip execution.

Also move the page flip event into the context of this worker, so
it gets cleaned up automatically.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Start tracking the flip state explicitly, as opposed to inferring
it from the presence if a new FB. This is a preparatory step to
introduce an new immediate state, where we can wait for a fence to
signal.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

The core already does the correct replacemet if the driver
page flip function returns without an error, so there is no
need to do it here.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

This patch changes the dev_info() call to dev_dbg() in ipu_plane_update()
to print out the information that a plane's CRTC is changed, because this
kind of information is only useful for debugging.

Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

It is replaced by drm_of_encoder_active_port_id.

Suggested-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

mode_fixup function for encoder drivers became optional with patch
http://patchwork.freedesktop.org/patch/msgid/1455106522-32307-1-git-send-email-palminha@synopsys.com

This patch set nukes all the dummy mode_fixup implementations.

(made on top of Daniel topic/drm-misc branch)

Signed-off-by: Carlos Palminha <palminha@synopsys.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/8bf274e8f6908142a9f940d3f2913e4a735e0caa.1455540137.git.palminha@synopsys.com