drm/i915/skl: WaIgnoreDDIAStrap is forever, always init DDI A
There is currently conflicting documentation on which steppings the workaround is needed, up to C vs. forever. However there is post-C stepping hardware that doesn't report port presence on DDI A, leading to black screen on eDP. Assume the strap isn't connected, and try to enable DDI A on these machines. (We'll still check the VBT for the info in DDI init.) Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Mika Westerberg <mika.westerberg@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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@ -13945,8 +13945,7 @@ static void intel_setup_outputs(struct drm_device *dev)
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*/
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found = I915_READ(DDI_BUF_CTL_A) & DDI_INIT_DISPLAY_DETECTED;
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/* WaIgnoreDDIAStrap: skl */
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if (found ||
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(IS_SKYLAKE(dev) && INTEL_REVID(dev) < SKL_REVID_D0))
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if (found || IS_SKYLAKE(dev))
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intel_ddi_init(dev, PORT_A);
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/* DDI B, C and D detection is indicated by the SFUSE_STRAP
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