forked from Minki/linux
mainlining shenanigans
7893df67e9
Currently if a component source buffer underruns or a component sink
buffer overruns the pipeline will enter an XRUN status and attempt
recovery. This is desired in most pipelines but some topologies need to
support use cases where we expect buffers to underrun or overrun.
Host ---> Proc----> Selector0 --> Buf0 ---- > DAI Playback
|
v
Buf1
|
v
Host <---------------Selector1 <----- Buf2 <----- Echo Ref DAI
In the example above we two host PCMs that can be independently
started/stopped thereby causing buf1 to either underrun or overrun
(and stop the pipelines). Buf1 should be permitted to underrun or overrun
without invoking pipeline XRUN logic and should over write oldest data
(for overrun) and readback 0s (for underrun).
2 flags have been added for use during buffer instantiation:
SOF_BUF_OVERRUN_PERMITTED and SOF_BUF_UNDERRUN_PERMITTED,
along with struct sof_ipc_buffer member fields: flags and reserved.
Flags field is supposed to hold the above-mentioned flags to allow
some control over XRUN behaviour.
Also added reserved field to the structure in case it comes in handy
some time in the future.
This is an incremental ABI change as the new fields are ignored by older
versions of the firmware.
Signed-off-by: Artur Kloniecki <arturx.kloniecki@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20200415202816.934-16-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.