When we dock a monitor we end up with a enable and disable connector
cycle but if hdcp content is running we get the userspace in
enabled state and driver maintaing a undesired state which causes
the content to stop playing and we only enabe hdcp if the userspace
state in desired. This patch fixes that.

Signed-off-by: Suraj Kandpal <[email protected]>
---
 drivers/gpu/drm/i915/display/intel_ddi.c    | 14 ++++++++++++--
 drivers/gpu/drm/i915/display/intel_dp_mst.c | 11 +++++++++--
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c 
b/drivers/gpu/drm/i915/display/intel_ddi.c
index 9151d5add960..3dbf2d545f24 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -3242,6 +3242,10 @@ static void intel_enable_ddi(struct intel_atomic_state 
*state,
                             const struct intel_crtc_state *crtc_state,
                             const struct drm_connector_state *conn_state)
 {
+       struct intel_connector *connector =
+               to_intel_connector(conn_state->connector);
+       struct intel_hdcp *hdcp = &connector->hdcp;
+
        drm_WARN_ON(state->base.dev, crtc_state->has_pch_encoder);
 
        if (!intel_crtc_is_bigjoiner_slave(crtc_state))
@@ -3259,9 +3263,15 @@ static void intel_enable_ddi(struct intel_atomic_state 
*state,
        else
                intel_enable_ddi_dp(state, encoder, crtc_state, conn_state);
 
-       /* Enable hdcp if it's desired */
+       /*
+        * Enable hdcp if it's desired or if userspace is enabled and
+        * driver set its state to undesired
+        */
        if (conn_state->content_protection ==
-           DRM_MODE_CONTENT_PROTECTION_DESIRED)
+           DRM_MODE_CONTENT_PROTECTION_DESIRED ||
+           (conn_state->content_protection ==
+           DRM_MODE_CONTENT_PROTECTION_ENABLED && hdcp->value ==
+           DRM_MODE_CONTENT_PROTECTION_UNDESIRED))
                intel_hdcp_enable(state, encoder, crtc_state, conn_state);
 }
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c 
b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 7b4628f4f124..008ff14fad18 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -788,6 +788,7 @@ static void intel_mst_enable_dp(struct intel_atomic_state 
*state,
        struct intel_digital_port *dig_port = intel_mst->primary;
        struct intel_dp *intel_dp = &dig_port->dp;
        struct intel_connector *connector = 
to_intel_connector(conn_state->connector);
+       struct intel_hdcp *hdcp = &connector->hdcp;
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        struct drm_dp_mst_topology_state *mst_state =
                drm_atomic_get_new_mst_topology_state(&state->base, 
&intel_dp->mst_mgr);
@@ -836,9 +837,15 @@ static void intel_mst_enable_dp(struct intel_atomic_state 
*state,
 
        intel_audio_codec_enable(encoder, pipe_config, conn_state);
 
-       /* Enable hdcp if it's desired */
+       /*
+        * Enable hdcp if it's desired or if userspace is enabled and
+        * driver set its state to undesired
+        */
        if (conn_state->content_protection ==
-           DRM_MODE_CONTENT_PROTECTION_DESIRED)
+           DRM_MODE_CONTENT_PROTECTION_DESIRED ||
+           (conn_state->content_protection ==
+           DRM_MODE_CONTENT_PROTECTION_ENABLED && hdcp->value ==
+           DRM_MODE_CONTENT_PROTECTION_UNDESIRED))
                intel_hdcp_enable(state, encoder, pipe_config, conn_state);
 }
 
-- 
2.25.1

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