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e75b965e9a
[why] If plane clip is outside current pipe's ODM slice rect, our logic will fail validation because we assume that when a pipe is acquired to support a plane clip, it must blend some portion of the plane on the screen. This assumption needs to be changed. When a pipe is acquired to render the plane, we are now allowing it to support a case where it can take minimum viewport and draw with zero recout size when the plane clip is outside current ODM slice rect. The reason is that we want to allocate and get the pipe pre-programmed so it is ready to be rendered when user moves the plane over to the current ODM slice with a fast update. Whereas with the existing solution when user moves the plane over, we will need to allocate a pipe as needed and power it up and program it through a full update. This not only impacts the user experience with unnecessary delay of a frame but also doesn't generate any benefit to the user because DML doesn't support it. DML will invalidate based on worst case scenario and it doesn't depend on the plane location. So having our programming sequence support such dynamic pipe allocation is not meaningful anyway. [how] In build scaler params allow recout to be zero size and if viewport is smaller than minimum, set minimum viewport size. Reviewed-by: Jun Lei <jun.lei@amd.com> Acked-by: Tom Chung <chiahsuan.chung@amd.com> Signed-off-by: Wenjing Liu <wenjing.liu@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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.