drm/amdgpu: Add DRM_MODE_CONNECTOR_VIRTUAL connector in amdgpu_connector_add.

For virtual display feature, add one connector type in amdgpu_connector_add.

Signed-off-by: Emily Deng <Emily.Deng@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 91 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
index ff0b55a65ca3..319a5e1d9389 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
@@ -1504,6 +1504,86 @@ static const struct drm_connector_funcs amdgpu_connector_edp_funcs = {
         .force = amdgpu_connector_dvi_force,
 };
 
+static struct drm_encoder *
+amdgpu_connector_virtual_encoder(struct drm_connector *connector)
+{
+        int enc_id = connector->encoder_ids[0];
+        struct drm_encoder *encoder;
+        int i;
+        for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
+                if (connector->encoder_ids[i] == 0)
+                        break;
+
+                encoder = drm_encoder_find(connector->dev, connector->encoder_ids[i]);
+                if (!encoder)
+                        continue;
+
+                if (encoder->encoder_type == DRM_MODE_ENCODER_VIRTUAL)
+                        return encoder;
+        }
+
+        /* pick the first one */
+        if (enc_id)
+                return drm_encoder_find(connector->dev, enc_id);
+        return NULL;
+}
+
+static int amdgpu_connector_virtual_get_modes(struct drm_connector *connector)
+{
+        struct drm_encoder *encoder = amdgpu_connector_best_single_encoder(connector);
+
+        if (encoder) {
+                amdgpu_connector_add_common_modes(encoder, connector);
+        }
+
+        return 0;
+}
+
+static int amdgpu_connector_virtual_mode_valid(struct drm_connector *connector,
+                                           struct drm_display_mode *mode)
+{
+        return MODE_OK;
+}
+
+int amdgpu_connector_virtual_dpms(struct drm_connector *connector, int mode)
+{
+        return 0;
+}
+
+static enum drm_connector_status
+
+amdgpu_connector_virtual_detect(struct drm_connector *connector, bool force)
+{
+        return connector_status_connected;
+}
+
+int amdgpu_connector_virtual_set_property(struct drm_connector *connector,
+                                  struct drm_property *property,
+                                  uint64_t val)
+{
+        return 0;
+}
+
+static void amdgpu_connector_virtual_force(struct drm_connector *connector)
+{
+        return;
+}
+
+static const struct drm_connector_helper_funcs amdgpu_connector_virtual_helper_funcs = {
+        .get_modes = amdgpu_connector_virtual_get_modes,
+        .mode_valid = amdgpu_connector_virtual_mode_valid,
+        .best_encoder = amdgpu_connector_virtual_encoder,
+};
+
+static const struct drm_connector_funcs amdgpu_connector_virtual_funcs = {
+        .dpms = amdgpu_connector_virtual_dpms,
+        .detect = amdgpu_connector_virtual_detect,
+        .fill_modes = drm_helper_probe_single_connector_modes,
+        .set_property = amdgpu_connector_virtual_set_property,
+        .destroy = amdgpu_connector_destroy,
+        .force = amdgpu_connector_virtual_force,
+};
+
 void
 amdgpu_connector_add(struct amdgpu_device *adev,
                       uint32_t connector_id,
@@ -1888,6 +1968,17 @@ amdgpu_connector_add(struct amdgpu_device *adev,
                         connector->interlace_allowed = false;
                         connector->doublescan_allowed = false;
                         break;
+                case DRM_MODE_CONNECTOR_VIRTUAL:
+                        amdgpu_dig_connector = kzalloc(sizeof(struct amdgpu_connector_atom_dig), GFP_KERNEL);
+                        if (!amdgpu_dig_connector)
+                                goto failed;
+                        amdgpu_connector->con_priv = amdgpu_dig_connector;
+                        drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_virtual_funcs, connector_type);
+                        drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_virtual_helper_funcs);
+                        subpixel_order = SubPixelHorizontalRGB;
+                        connector->interlace_allowed = false;
+                        connector->doublescan_allowed = false;
+                        break;
                 }
         }