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The function dc_update_planes_and_stream handles multiple cases where DC needs to remove and add planes in the commit tail phase. After Linux started to use this function, some of the IGT kms_plane started to fail; one good example to illustrate why the new sequence regressed IGT is the subtest plane-position-hole which has the following diagram as a template: +--------------------+ +-----------------------+ | +-----+ | | +-----+ | | | | | | | +-----+ | | | +--+ | ==> | | | | | | | |__| | | +-|---+ | | | | | +-----+ | | | | | +--------------------+ +-----------------------+ (a) Final image (b) Composed image IGT expects image (a) as the final result of two plane compositions as described in figure (b). After the migration to the new sequence, the last plane order is changed, and DC generates the following image: +---------------------+ | +-----+ | | | | | | | | | | +-----+ | | | +---------------------+ Notice that the generated image by DC is different because the small square that should be composed on top of the primary plane is below the primary plane. For this reason, the CRC will mismatch with the expected value. Since the function dc_add_all_planes_for_stream re-append all the new planes back to the dc_validation_set, this commit ensures that the original sequence is maintained. After this change, all CI tests in all ASICs start to pass again. Reviewed-by: Harry Wentland <Harry.Wentland@amd.com> Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com> Suggested-by: Melissa Wen <mwen@igalia.com> Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> |
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| 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.