[Intel-gfx] [PATCH v2] drm/i915/skl: Implement WaDisableHBR2

[Damien Lespiau]

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

Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index d4c82d7..a7bc3e8 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -129,7 +129,10 @@ 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;
-- 
1.8.3.1