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Starting on CNL we now need to map VBT DDC Pin to
BSPec DDC Pin values. Not a direct translation anymore.
According to VBT
Block 2 (General Bytes Definition)
DDC Bus
+----------+-----------+--------------------+
| DDI Type | VBT Value | Bspec Mapped Value |
+----------+-----------+--------------------+
| DDI-B | 0x1 | 0x1 |
| DDI-C | 0x2 | 0x2 |
| DDI-D | 0x3 | 0x4 |
| DDI-F | 0x4 | 0x3 |
+----------+-----------+--------------------+
v2: Move defines to a better place.
This is actually CNL_PCH not CNL only.
v3: Accepting Ville's suggestions: enums and array to
to make this future proof.
v4: Protect the array access as Ville suggested.
Also accepting all Jani's suggestions:
- use already defined gmbus pin definitions.
- use map_ddc_pin for disambiguation.
- Add /* sic */ comment on inverted values
so people can easily see it it nos a mistake
we have the map 3 -> 4 and 4 -> 3 :/
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Cc: Clinton Taylor <clinton.a.taylor@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171020172641.16029-1-rodrigo.vivi@intel.com
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.