The TSPP driver's kernel API supports opening and closing a TSPP stream
using the tspp_open_stream/tspp_close_stream API functions. This commit
fixes a few minor issues with the behavior and usage of this API.
tspp_open_stream and tspp_close_stream were fixed to connect/disconnect
the appropriate TSIF source based on the TSIF reference count.
The call to tspp_close_stream from within tspp_close_channel was removed,
since a kernel driver that uses the TSPP driver API is expected to call
tspp_close_stream explicitly, and not rely on the TSPP driver to close
the stream implicitly when the channel is closed.
An ioctl was added to allow user-space application to close the stream.
Change-Id: If49b440d9d83c8bba54aeabc18e8f06b3cc11b3e
Signed-off-by: Liron Kuch <lkuch@codeaurora.org>
TSIF signals (clock, data, enable and sync) may be configured
to be inversed at TSPP unit input. This is useful in case
TSIF signals from external units need to be inversed.
Change-Id: Idd21948baccedc7499b31ed1d4df0f737538c870
Signed-off-by: Hamad Kadmany <hkadmany@codeaurora.org>
The demux is an in-kernel software component whose purpose is to take
an incoming TSIF stream and split it into multiple output channels
based on the PID field in each TS packet. Each output channel can be
used for a different purpose, such as audio, video or channel
information. In order to get good performance when moving such large
data streams around, the demux was placed in kernel-space as to
prevent copying memory buffers between kernel-space and user-space, at
least at this early stage in processing the traffic. Originally the
design of the TSPP driver was based on the earlier TSIF driver, so it
contained only a user-space API.
Change-Id: I22799eb19d9049e3635d5c589b02f999d9b8e1c7
Signed-off-by: Joel Nider <jnider@codeaurora.org>
The TSPP driver manages the transport stream packet processor. This core
is used to offload the main CPU by handling MPEG TS packets, generally
coming from a broadcast modem using the ISDB-T (or variant) protocol.
Change-Id: Ia4c16dcce970ae0f52d8d17957a92fce34ecdb44
Signed-off-by: Joel Nider <jnider@codeaurora.org>
Liron Kuch
Hamad Kadmany
Joel Nider