diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp_mst.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_mst.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index e1bc14139f46..f7df7a5b7c13 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -529,6 +529,7 @@ static void intel_mst_enable_dp(struct intel_atomic_state *state, struct intel_digital_port *intel_dig_port = intel_mst->primary; struct intel_dp *intel_dp = &intel_dig_port->dp; struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + u32 val; drm_WARN_ON(&dev_priv->drm, pipe_config->has_pch_encoder); @@ -536,6 +537,13 @@ static void intel_mst_enable_dp(struct intel_atomic_state *state, intel_ddi_enable_transcoder_func(encoder, pipe_config); + val = intel_de_read(dev_priv, + TRANS_DDI_FUNC_CTL(pipe_config->cpu_transcoder)); + val |= TRANS_DDI_DP_VC_PAYLOAD_ALLOC; + intel_de_write(dev_priv, + TRANS_DDI_FUNC_CTL(pipe_config->cpu_transcoder), + val); + drm_dbg_kms(&dev_priv->drm, "active links %d\n", intel_dp->active_mst_links); |