drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX channel

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commit 348e4058eb upstream.

While technically CHV isn't DDI, we do look at the VBT based DDI port
info for HDMI DDC pin and DP AUX channel. (We call these "alternate",
but they're really just something that aren't platform defaults.)

In commit e4ab73a132 ("drm/i915: Respect alternate_ddc_pin for all DDI
ports") Ville writes, "IIRC there may be CHV system that might actually
need this."

I'm not sure why there couldn't be even more platforms that need this,
but start conservative, and parse the info for CHV in addition to DDI.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100553
Reported-by: Marek Wilczewski <mw@3cte.pl>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/d0815082cb98487618429b62414854137049b888.1506586821.git.jani.nikula@intel.com
[bwh: Backported to 3.16: IS_CHERRYVIEW() takes a drm_device pointer]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

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This commit is contained in:

Jani Nikula 2017-09-28 11:21:57 +03:00 • committed by Ben Hutchings

parent 5293e74b7d

commit 6addf2c8f4

1 changed files with 1 additions and 1 deletions

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drivers/gpu/drm/i915/intel_bios.c

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