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Some variants of the chip (ADV7180) have it's decoder powered up after reset, while others (ADV7280, ADV7281, ADV7282, ADV7283) have it powered down. This is tracked by the feature flag ADV7180_FLAG_RESET_POWERED. At probe this flag is used to initialize the state variable powered which keeps track of if the decoder is powered on, or off, for the resume callback. This however misses that the decoder needs to be powered off for some configuration of the device to take hold. So for devices where it's left on (ADV7180) the format configuration at probe time have little effect. This worked as the .set_fmt callback powers down the decoder, updates the format, and powers back on the decoder. Before moving all configuration to .s_stream this needs to be fixed. Instead of tracking if the decoder is powered on or off, use the flag to determine if needs to be powered down after a reset to do the configuration. To keep the behavior consistent with the currents implementation switch the decoder back on for devices where this is the reset behavior. The primary reason for this is that if not done the first 35+ frames or so of the capture session is garbage. To keep the support of starting the decoder when resuming from sleep on devices where the reset behavior is to start with the decoder powered off, use the state variable streaming. If it is set the decoder was powered on when the system suspended so we know to start it again when resuming. Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org> [hverkuil: fix typo in comment: where -> were] |
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| certs | ||
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| drivers | ||
| fs | ||
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| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
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| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .pylintrc | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
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| 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 reStructuredText 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.