@@ -3695,6 +3695,18 @@ bool intel_dp_initial_fastset_check(struct intel_encoder *encoder,
struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+ struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+
+ /*
+ * If BIOS has set an unsupported or non-standard link rate for some
+ * reason force an encoder recompute and full modeset.
+ */
+ if (intel_dp_rate_index(intel_dp->source_rates, intel_dp->num_source_rates,
+ crtc_state->port_clock) < 0) {
+ drm_dbg_kms(&i915->drm, "Forcing full modeset due to unsupported link rate\n");
+ crtc_state->uapi.connectors_changed = true;
+ return false;
+ }
/*
* FIXME hack to force full modeset when DSC is being used.