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e66f609bae
Rocket Lake has a third DPLL (called 'DPLL4') that must be used to enable a third display. Unlike EHL's variant of DPLL4, the RKL variant behaves the same as DPLL0/1. And despite its name, the DPLL4 registers are offset as if it were DPLL2. v2: - Add new .update_ref_clks() hook. v3: - Renumber TBT PLL to '3' and switch _MMIO_PLL3 to _MMIO_PLL (Lucas) v4: - Don't drop _MMIO_PLL3; although it's now unused, we're going to need it very soon again for upcoming DG1 patches. (Lucas) v5: - Don't re-number TBT PLL and beyond, just use new RKL_DPLL_CFGCR macros to lookup the proper registers instead. Although renumbering the PLLs might be something we want to consider down the road, it opens a big can of worms right now since a bunch of places in the code have an assumption that the PLL table has idx==id and no holes. Renumbering creates a hole for TGL, so we'd either need to allow holes in the table or break the idx==id invariant, both of which are somewhat invasive changes to the design. Bspec: 49202 Bspec: 49443 Bspec: 50288 Bspec: 50289 Cc: Lucas De Marchi <lucas.demarchi@intel.com> Cc: José Roberto de Souza <jose.souza@intel.com> Signed-off-by: Matt Roper <matthew.d.roper@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200716220551.2730644-4-matthew.d.roper@intel.com Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> |
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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.