[Bug 103347] [dp] intel_dp.c:1554 WARN_ON(len <=8)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103347

--- Comment #36 from F.Hartung <f.hartung at outlook.de> ---
The patch I applied to kernel 4.16.8

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 62f82c4298ac..0f2ad4983582 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -6036,8 +6036,14 @@
                return false;

        intel_dp_set_source_rates(intel_dp);
-
+    intel_dp->dpcd[DP_MAX_LINK_RATE] = DP_LINK_BW_1_62;
+    intel_dp_set_sink_rates(intel_dp);
+    intel_dp_set_common_rates(intel_dp);
+
+    intel_dp->max_link_lane_count = 1;
+    intel_dp->max_link_rate = 162000;
        intel_dp->reset_link_params = true;
+
        intel_dp->pps_pipe = INVALID_PIPE;
        intel_dp->active_pipe = INVALID_PIPE;

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