drm/amd/display: handle DP cpirq

[Why]
This is needed for DP as DP can send us info using irq.

[How]
Check if irq bit is set on short pulse and call the
function that handles cpirq in amdgpu_dm_hdcp

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 4a71bb0..bb74c3a 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1626,6 +1626,12 @@ static void handle_hpd_rx_irq(void *param)
        struct dc_link *dc_link = aconnector->dc_link;
        bool is_mst_root_connector = aconnector->mst_mgr.mst_state;
        enum dc_connection_type new_connection_type = dc_connection_none;
+#ifdef CONFIG_DRM_AMD_DC_HDCP
+       union hpd_irq_data hpd_irq_data;
+       struct amdgpu_device *adev = dev->dev_private;
+
+       memset(&hpd_irq_data, 0, sizeof(hpd_irq_data));
+#endif
 
        /*
         * TODO:Temporary add mutex to protect hpd interrupt not have a gpio
@@ -1635,7 +1641,12 @@ static void handle_hpd_rx_irq(void *param)
        if (dc_link->type != dc_connection_mst_branch)
                mutex_lock(&aconnector->hpd_lock);
 
+
+#ifdef CONFIG_DRM_AMD_DC_HDCP
+       if (dc_link_handle_hpd_rx_irq(dc_link, &hpd_irq_data, NULL) &&
+#else
        if (dc_link_handle_hpd_rx_irq(dc_link, NULL, NULL) &&
+#endif
                        !is_mst_root_connector) {
                /* Downstream Port status changed. */
                if (!dc_link_detect_sink(dc_link, &new_connection_type))
@@ -1670,6 +1681,10 @@ static void handle_hpd_rx_irq(void *param)
                        drm_kms_helper_hotplug_event(dev);
                }
        }
+#ifdef CONFIG_DRM_AMD_DC_HDCP
+       if (hpd_irq_data.bytes.device_service_irq.bits.CP_IRQ)
+               hdcp_handle_cpirq(adev->dm.hdcp_workqueue,  aconnector->base.index);
+#endif
        if ((dc_link->cur_link_settings.lane_count != LANE_COUNT_UNKNOWN) ||
            (dc_link->type == dc_connection_mst_branch))
                dm_handle_hpd_rx_irq(aconnector);