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[why] There is a recent work for developing a new pipe resource allocation policy used for new ASIC. The new code change needs to modify asic independent pipe resource allocation flow and hook up the new allocation policy in asic dependent layer. Unfortunately this change revealed a hidden bug in the old pipe resource allocation sequence used for older asics. In the older version of acquiring pipe for layer, we are always assigning otg master's opp and tg to the newly allocated secondary dpp pipe. This logic is incorrect when the secodnary dpp pipe is connected to a secondary opp head pipe in ODM combine configuration. Before the recent change, we will overwrite this wrong assignement in asic independent layer again. This covers up the issue. With the recent change, we will no longer cover up this in upper layer and therefore causes wrong tg and opp assignement to the secondary dpp pipe connected to a secondary opp head. [how] Always assign tg and opp from its own opp head instead of otg master. Reviewed-by: Martin Leung <martin.leung@amd.com> Acked-by: Stylon Wang <stylon.wang@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.