A range of fixes for the Armada DRM driver:
- A missing wakeup could result in overlay frames being delayed, causing
  video playback to hiccup.
- Avoid unmapping a dma-buf attachment which was never mapped
- Fix the overlay when partially off the screen by switching to the
  drm_plane_helper_check_update() helper and using the calculated
  coordinates to set the start address.
- Remove an incorrect assignment to crtc->mode - which should be the
  unadjusted mode.
- Fix a missing call to drm_plane_cleanup() in the overlay code.

* 'drm-armada-fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  drm/armada: avoid saving the adjusted mode to crtc->mode
  drm/armada: fix overlay when partially off-screen
  drm/armada: convert overlay to use drm_plane_helper_check_update()
  drm/armada: fix gem object free after failed prime import
  drm/armada: fix incorrect overlay plane cleanup
  drm/armada: fix missing overlay wake-up

We're not supposed to store the adjusted mode into crtc->mode.  We don't
use it anyway, so we can safely remove this.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Fix the start address calculation when overlay is partially off screen.
fb->bits_per_pixel is not set for YUV formats, and is always zero, which
led to the first component always starting at zero.

Use drm_format_plane_cpp() instead.

This also revealed a problem in that YUYV formats toggle the U/V data
for odd pixel start address offsets.  We try to rectify that by
toggling the U/V swap, which for the most part works, but seemingly
introduces a flicker for one scan frame of swapped U/V.

However, these changes result in an overall improvement.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Use drm_plane_helper_check_update() rather than our own code to validate
and limit the size of the displayed image.  As we are able to support
scaling, permit the full scaling ability.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Fix the gem object freeing after a partial import of a dma buffer,
eg, one which has been imported, but not mapped.  This was provoking
a warning from the dma_buf code.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

The Armada overlay plane wasn't being properly cleaned up as it was
missing a call to drm_plane_cleanup().  It also wasn't freeing the
right type of pointer (although we were still freeing the right
pointer value.)

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Nothing was waking up the overlay plane wait queue, so we were fully
reliant on the HZ/25 wait timing out to make progress.  Fix the lack
of wake-up.

We were also mis-handling the wait_event_timeout() return value - this
returns an unsigned integer of the remaining time, or zero on timeout
and the condition evaluated false.  Checking this for less than zero
is not sane.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

some minor cleanups
* 'drm-armada-devel' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  drm/armada: armada_drv: Remove unused function
  drm/armada: armada_output: Remove some unused functions

At present, dma_buf_export() takes a series of parameters, which
makes it difficult to add any new parameters for exporters, if required.

Make it simpler by moving all these parameters into a struct, and pass
the struct * as parameter to dma_buf_export().

While at it, unite dma_buf_export_named() with dma_buf_export(), and
change all callers accordingly.

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>

Not to be modified.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>