drm/i915/hotplug: Handle CP_IRQ for DP-MST

Handle CP_IRQ in DEVICE_SERVICE_IRQ_VECTOR_ESI0
It requires to call intel_hdcp_handle_cp_irq() in case
of CP_IRQ is triggered by a sink in DP-MST topology.

Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Cc: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Ramalingam C <ramalingam.c@intel.com>
Tested-by: Karthik B S <karthik.b.s@intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210111081120.28417-4-anshuman.gupta@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 469e765..8aadb08 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -6205,6 +6205,17 @@ update_status:
                            "Could not write test response to sink\n");
 }
 
+static void
+intel_dp_mst_hpd_irq(struct intel_dp *intel_dp, u8 *esi, bool *handled)
+{
+               drm_dp_mst_hpd_irq(&intel_dp->mst_mgr, esi, handled);
+
+               if (esi[1] & DP_CP_IRQ) {
+                       intel_hdcp_handle_cp_irq(intel_dp->attached_connector);
+                       *handled = true;
+               }
+}
+
 /**
  * intel_dp_check_mst_status - service any pending MST interrupts, check link status
  * @intel_dp: Intel DP struct
@@ -6249,7 +6260,8 @@ intel_dp_check_mst_status(struct intel_dp *intel_dp)
 
                drm_dbg_kms(&i915->drm, "got esi %3ph\n", esi);
 
-               drm_dp_mst_hpd_irq(&intel_dp->mst_mgr, esi, &handled);
+               intel_dp_mst_hpd_irq(intel_dp, esi, &handled);
+
                if (!handled)
                        break;