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drm/i915/skl: Implement WaDisableHBR2

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v2: Use the recently introduced INTEL_REVID() and SKL_REVID defines
    (Nick Hoath)

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Tested-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89554
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2015-02-11 17:43:24 +00:00 committed by Daniel Vetter
parent 7a8785f7ee
commit 8749be86a8
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/i915/intel_dp.c
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@ -134,7 +134,10 @@ intel_dp_max_link_bw(struct intel_dp *intel_dp)
case DP_LINK_BW_2_7:
break;
case DP_LINK_BW_5_4: /* 1.2 capable displays may advertise higher bw */
if (((IS_HASWELL(dev) && !IS_HSW_ULX(dev)) ||
if (IS_SKYLAKE(dev) && INTEL_REVID(dev) <= SKL_REVID_B0)
/* WaDisableHBR2:skl */
max_link_bw = DP_LINK_BW_2_7;
else if (((IS_HASWELL(dev) && !IS_HSW_ULX(dev)) ||
INTEL_INFO(dev)->gen >= 8) &&
intel_dp->dpcd[DP_DPCD_REV] >= 0x12)
max_link_bw = DP_LINK_BW_5_4;