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Commit 5d6f36b2 authored by Ville Syrjälä's avatar Ville Syrjälä
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drm/i915: Don't apply the 16Gb DIMM wm latency w/a to BXT/GLK



The 16Gb DIMM w/a is not applicable to BXT or GLK. Limit it to
the appropriate platforms.

This was especially harsh on GLK since we don't even try to read
the DIMM information on that platforms, hence valid_dimm was
always false and thus we always tried to apply the w/a.
Furthermore the w/a pushed the level 0 latency above the
level 1 latency, which doesn't really make sense.

v2: Do the check when populating is_16gb_dimm (Mahesh)

Cc: Mahesh Kumar <mahesh1.kumar@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Fixes: 86b59287 ("drm/i915: Implement 16GB dimm wa for latency level-0")
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181023182102.31549-1-ville.syrjala@linux.intel.com


Reviewed-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: default avatarMahesh Kumar <mahesh1.sh.kumar@gmail.com>
parent 26ee5bc3
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