Initial CODA960 (i.MX6 VPU) support

Hi,

this is a second shot at adding support for the CODA960 Video
Processing Unit on i.MX6Q/D/DL/S SoCs to the coda driver.

Changes since v1:
 - Dropped force IDR patch.
 - Dropped enum_framesizes for now.
 - Clear B frame flag for decoder I/P/B frame detection.
 - Rewrote g_selection to only allow CROP target on OUTPUT and
   COMPOSE target on CAPTURE buffers.
 - Use pm_runtime_enabled()

This series contains a few fixes and preparations, the CODA960
support patch, a rework of the hardware access serialization
into a single threaded workqueue, some cleanups to use more
infrastructure that is available in the meantime, runtime PM
support, a few h.264 related v4l2 controls and fixes, support
for hard resets via the i.MX system reset controller, and a
patch that exports internal buffers to debugfs.

regards
Philipp

Michael Olbrich (2):
  [media] v4l2-mem2mem: export v4l2_m2m_try_schedule
  [media] coda: try to schedule a decode run after a stop command

Philipp Zabel (27):
  [media] coda: fix decoder I/P/B frame detection
  [media] coda: fix readback of CODA_RET_DEC_SEQ_FRAME_NEED
  [media] coda: fix h.264 quantization parameter range
  [media] coda: fix internal framebuffer allocation size
  [media] coda: simplify IRAM setup
  [media] coda: Add encoder/decoder support for CODA960
  [media] coda: remove BUG() in get_q_data
  [media] coda: add selection API support for h.264 decoder
  [media] coda: add workqueue to serialize hardware commands
  [media] coda: Use mem-to-mem ioctl helpers
  [media] coda: use ctx->fh.m2m_ctx instead of ctx->m2m_ctx
  [media] coda: Add runtime pm support
  [media] coda: split firmware version check out of coda_hw_init
  [media] coda: select GENERIC_ALLOCATOR
  [media] coda: add h.264 min/max qp controls
  [media] coda: add h.264 deblocking filter controls
  [media] coda: add cyclic intra refresh control
  [media] coda: add decoder timestamp queue
  [media] coda: alert userspace about macroblock errors
  [media] coda: add sequence counter offset
  [media] coda: use prescan_failed variable to stop stream after a
    timeout
  [media] coda: add reset control support
  [media] coda: add bytesperline to queue data
  [media] coda: allow odd width, but still round up bytesperline
  [media] coda: round up internal frames to multiples of macroblock size
    for h.264
  [media] coda: increase frame stride to 16 for h.264
  [media] coda: export auxiliary buffers via debugfs

 drivers/media/platform/Kconfig         |    1 +
 drivers/media/platform/coda.c          | 1444 ++++++++++++++++++++++----------
 drivers/media/platform/coda.h          |  115 ++-
 drivers/media/v4l2-core/v4l2-mem2mem.c |    3 +-
 include/media/v4l2-mem2mem.h           |    2 +
 5 files changed, 1140 insertions(+), 425 deletions(-)

-- 
2.0.0