video: update imx-ipu-v3 and hdmi support

[Sascha Hauer]

This makes the i.MX6 HDMI work with higher resolutions. Also we now
use writecombined memory for faster graphics.

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Sascha Hauer (4):
      video: imx-hdmi: sync with kernel
      video: ipuv3: Adjust videomode to IPU limitations
      ARM: implement dma_alloc_writecombine
      video: imx-ipu-v3: Use writecombine memory for fb

 arch/arm/cpu/mmu.c                  |  20 ++
 drivers/video/imx-ipu-v3/imx-hdmi.c | 380 ++++++++++++++++++++++--------------
 drivers/video/imx-ipu-v3/imx-hdmi.h |   3 +-
 drivers/video/imx-ipu-v3/ipufb.c    |  32 ++-
 include/dma.h                       |   1 +
 5 files changed, 287 insertions(+), 149 deletions(-)