[GIT PULL] imx-drm fixes for i.MX5 regression and i.MX6QP PRE/PRG stability

[Philipp Zabel]

Hi Dave,

this tag contains a fix for a regression introduced in v4.14-rc1 with
commit 790cb4c7c954 ("drm/imx: lock scanout transfers for consecutive
bursts"), which breaks display output on i.MX53. Also there are two
patches to solve display output instability issues on i.MX6QP with the
prefetch/resolve feature.

regards
Philipp

The following changes since commit 8a5776a5f49812d29fe4b2d0a2d71675c3facf3f:

  Linux 4.14-rc4 (2017-10-08 20:53:29 -0700)

are available in the git repository at:

  git://git.pengutronix.de/git/pza/linux.git tags/imx-drm-fixes-2017-10-12

for you to fetch changes up to 11aff4b4c7c4b7257660ef890920f2ac72911ed0:

  gpu: ipu-v3: pre: implement workaround for ERR009624 (2017-10-11 12:04:24 +0200)

----------------------------------------------------------------
drm/imx: i.MX5 regression fix and i.MX6QP PRE/PRG stability fixes

- Disable channel burst locking on IPUv3EX (i.MX51) and IPUv3M (i.MX53).
  This fixes a regression introduced by commit 790cb4c7c954 ("drm/imx: lock
  scanout transfers for consecutive bursts").
- Give PRG a head start. Waiting for both double buffers to fill up before
  enabling the IPU improves startup reliability.
- Avoid PRE control register updates during unsafe window, workaround for
  ERR009624.

----------------------------------------------------------------
Lucas Stach (2):
      gpu: ipu-v3: prg: wait for double buffers to be filled on channel startup
      gpu: ipu-v3: pre: implement workaround for ERR009624

Philipp Zabel (1):
      gpu: ipu-v3: Allow channel burst locking on i.MX6 only

 drivers/gpu/ipu-v3/ipu-common.c |  8 ++++++++
 drivers/gpu/ipu-v3/ipu-pre.c    | 29 +++++++++++++++++++++++++++++
 drivers/gpu/ipu-v3/ipu-prg.c    |  7 +++++++
 3 files changed, 44 insertions(+)