forked from Minki/linux
mainlining shenanigans
2b48e11386
Since the draining and stop phase of the HW decoder mem2mem bahaviour is now clearly defined, we can move handling of the following states to the common v4l2-mem2mem core code: - draining - stopped - next-buf-is-last By introducing the following v4l2-mem2mem APIs: - v4l2_m2m_encoder_cmd/v4l2_m2m_ioctl_encoder_cmd to handle start/stop command - v4l2_m2m_decoder_cmd/v4l2_m2m_ioctl_decoder_cmd to handle start/stop command - v4l2_m2m_update_start_streaming_state to update state on start of streaming of the de/encoder queue - v4l2_m2m_update_stop_streaming_state to update state on stop of streaming of the de/encoder queue - v4l2_m2m_last_buffer_done to make the current dest buffer as the last one And inline helpers: - v4l2_m2m_mark_stopped to mark the de/encoding process as stopped - v4l2_m2m_clear_state to clear the de/encoding state - v4l2_m2m_dst_buf_is_last to detect the current dequeued dst_buf is the last - v4l2_m2m_has_stopped to detect the de/encoding stopped state - v4l2_m2m_is_last_draining_src_buf to detect the current source buffer should be the last processing before stopping the de/encoding process The special next-buf-is-last when min_buffers != 1 case is also handled in v4l2_m2m_qbuf() by reusing the other introduced APIs. This state management has been stolen from the vicodec implementation, and is no-op for drivers not calling the v4l2_m2m_encoder_cmd or v4l2_m2m_decoder_cmd and v4l2_m2m_update_start/stop_streaming_state. The vicodec will be the first one to be converted as an example. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@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.