[PATCH v2 0/3] media: cedrus: Add support for 4k videos

[Jernej Skrabec]

While cedrus driver accepts videos up to 3840x2160, they are not decoded
correctly. Driver doesn't correctly set mode register for widths greater
than 2048 (patch 1). H264 engine also needs additional buffers which are
not provided currently (patch 2). Finally, there are several different
resolutions which can be considered 4k. Biggest is 4096x2304 which is
also supported by HW. Set that new maximum size (patch 3).

HEVC engine was also tested with 4k video.

Following video was used for H264 video testing:
http://jernej.libreelec.tv/videos/h264/PUPPIES%20BATH%20IN%204K%20(ULTRA%20HD)(Original_H.264-AAC)%20(4ksamples.com).mp4

Note that at this point memory allocation is suboptimal and H264 engine
allocates far more memory that it is really needed. For above video to
work, I had to set CMA size to 512 MiB and add "vmalloc=512M" to kernel
arguments. Memory optimizations will be done later.

Best regards,
Jernej

Changes from v1:
- added Paul's acked-by
- added define for minimum pic info buf size
- added comments that formulas come from CedarX source

Jernej Skrabec (3):
  media: cedrus: Properly signal size in mode register
  media: cedrus: Fix H264 4k support
  media: cedrus: Increase maximum supported size

 drivers/staging/media/sunxi/cedrus/cedrus.h   |  7 ++
 .../staging/media/sunxi/cedrus/cedrus_h264.c  | 93 +++++++++++++++++--
 .../staging/media/sunxi/cedrus/cedrus_h265.c  |  2 +-
 .../staging/media/sunxi/cedrus/cedrus_hw.c    |  9 +-
 .../staging/media/sunxi/cedrus/cedrus_hw.h    |  2 +-
 .../staging/media/sunxi/cedrus/cedrus_mpeg2.c |  2 +-
 .../staging/media/sunxi/cedrus/cedrus_regs.h  | 13 +++
 .../staging/media/sunxi/cedrus/cedrus_video.c |  4 +-
 8 files changed, 116 insertions(+), 16 deletions(-)

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2.24.0