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

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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>
Cc: stable@vger.kernel.org
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
(cherry picked from commit 348e4058eb)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Jani Nikula 2017-09-28 11:21:57 +03:00 committed by Rodrigo Vivi
parent 7b50f7b24c
commit ea850f64c2
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_bios.c
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@ -1240,7 +1240,7 @@ static void parse_ddi_ports(struct drm_i915_private *dev_priv,
{
enum port port;
if (!HAS_DDI(dev_priv))
if (!HAS_DDI(dev_priv) && !IS_CHERRYVIEW(dev_priv))
return;
if (!dev_priv->vbt.child_dev_num)