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media: staging/intel-ipu3: Add dual pipe support

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This patch adds support to run dual pipes simultaneously.
A private ioctl to configure the pipe mode (video or still)
is also implemented.

IPU3 hardware supports a maximum of 2 streams per pipe.
With the support of dual pipes, more than 2 stream outputs
can be achieved.

This helps to support advanced camera features like
Continuous View Finder (CVF) and Snapshot During Video(SDV).

Extend ipu3 IMGU driver to support dual pipes

    1. Extend current IMGU device to contain 2 groups
       of video nodes and 2 subdevs
    2. Extend current css to support 2 pipeline and make
       CSS APIs to support 2 pipe
    3. Add a v4l2 ctrl to allow user to specify the mode
       of the pipe
    4. Check media pipeline link status to get enabled
       pipes

Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Tian Shu Qiu <tian.shu.qiu@intel.com>
Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Bingbu Cao 2018-12-06 20:03:39 -05:00 • committed by Mauro Carvalho Chehab
commit 51abe041c5
10 changed files with 1450 additions and 948 deletions
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