drm/i915: fix lane bandwidth capping for DP 1.2 sinks

[deliverable/linux.git] / drivers / gpu / drm / i915 / intel_dp.c

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index b739712340131dae2e35f56613fae22f2ca819f0..26e162bb3a5158d5da3f1b5e9b2614c7515ede6b 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -75,7 +75,12 @@ intel_dp_max_link_bw(struct intel_dp *intel_dp)
        case DP_LINK_BW_1_62:
        case DP_LINK_BW_2_7:
                break;
+       case DP_LINK_BW_5_4: /* 1.2 capable displays may advertise higher bw */
+               max_link_bw = DP_LINK_BW_2_7;
+               break;
        default:
+               WARN(1, "invalid max DP link bw val %x, using 1.62Gbps\n",
+                    max_link_bw);
                max_link_bw = DP_LINK_BW_1_62;
                break;
        }