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f01d091c3e
The atomisp interrupt handling will free the MIPI / CSI-receiver buffers when processing a frame-completion event if the stop_requested flag is set, but only in the ISP2400 / BYT, not in the ISP2401 / CHT case. There are 2 problems with this: 1. Since this is only done in the BYT case the "mipi frames are not freed." warning always triggers on CHT devices. 2. There are 2 stop_requested flags, ia_css_pipe.stop_requested and ia_css_pipeline.stop_requested. The ISR checks the ia_css_pipe flag, but atomisp_css_stop() sets the ia_css_pipeline.stop_requested flag. So even on BYT freeing the buffers from the ISR never happens. This likely is a good thing since the buffers get freed on the first frame completion event and there might be multiple frames queued up. Fix things by completely dropping the freeing of the MIPI buffers from the ISR as well as the stop_requested flag always freeing the buffers from ia_css_uninit(). Also drop the warning since this now always is expected behavior. Note that ia_css_uninit() get called whenever streaming is stopped through atomisp_stop_stream() calling atomisp_reset() so the buffers are still freed whenever streaming is stopped. Signed-off-by: Hans de Goede <hansg@kernel.org> Reviewed-by: Andy Shevchenko <andy@kernel.org> Link: https://lore.kernel.org/r/20250505210008.152659-5-hdegoede@redhat.com Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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.