diff options
| author | Imre Deak <imre.deak@intel.com> | 2020-06-23 11:24:11 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2020-06-24 11:51:25 +0300 |
| commit | 580fbdc5136822208f107500682e50a1cb232e94 (patch) | |
| tree | d2dc46f226c59ebce80beb7ca05c7b0c4892b241 /drivers/gpu/drm/i915/display/intel_dp_mst.c | |
| parent | 90d4f99ac56b4aadf4e87871a4e9128474da259b (diff) | |
| download | linux-580fbdc5136822208f107500682e50a1cb232e94.tar.xz | |
drm/i915/dp_mst: Enable VC payload allocation after transcoder is enabled
The spec requires enabling the MST Virtual Channel payload allocation
- in a separate step - after the transcoder is enabled, follow this.
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200623082411.3889-1-imre.deak@intel.com
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); |