[PATCH v3 4/5] drm/connector: Add a helper to attach the colorspace property

[Maxime Ripard <maxime@cerno.tech>]

The intel driver uses the same logic to attach the Colorspace property
in multiple places and we'll need it in vc4 too. Let's move that common
code in a helper.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>

---

Changes from v2:
  - Rebased on current drm-misc-next

Changes from v1:
  - New patch
---
 drivers/gpu/drm/drm_connector.c               | 20 +++++++++++++++++++
 .../gpu/drm/i915/display/intel_connector.c    |  6 ++----
 include/drm/drm_connector.h                   |  1 +
 3 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index eed9cd05c94e..733da42cfd31 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -2172,6 +2172,26 @@ int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *conn
 }
 EXPORT_SYMBOL(drm_connector_attach_hdr_output_metadata_property);
 
+/**
+ * drm_connector_attach_colorspace_property - attach "Colorspace" property
+ * @connector: connector to attach the property on.
+ *
+ * This is used to allow the userspace to signal the output colorspace
+ * to the driver.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_connector_attach_colorspace_property(struct drm_connector *connector)
+{
+	struct drm_property *prop = connector->colorspace_property;
+
+	drm_object_attach_property(&connector->base, prop, DRM_MODE_COLORIMETRY_DEFAULT);
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_connector_attach_colorspace_property);
+
 /**
  * drm_connector_atomic_hdr_metadata_equal - checks if the hdr metadata changed
  * @old_state: old connector state to compare
diff --git a/drivers/gpu/drm/i915/display/intel_connector.c b/drivers/gpu/drm/i915/display/intel_connector.c
index d5ceb7bdc14b..9bed1ccecea0 100644
--- a/drivers/gpu/drm/i915/display/intel_connector.c
+++ b/drivers/gpu/drm/i915/display/intel_connector.c
@@ -282,14 +282,12 @@ void
 intel_attach_hdmi_colorspace_property(struct drm_connector *connector)
 {
 	if (!drm_mode_create_hdmi_colorspace_property(connector))
-		drm_object_attach_property(&connector->base,
-					   connector->colorspace_property, 0);
+		drm_connector_attach_colorspace_property(connector);
 }
 
 void
 intel_attach_dp_colorspace_property(struct drm_connector *connector)
 {
 	if (!drm_mode_create_dp_colorspace_property(connector))
-		drm_object_attach_property(&connector->base,
-					   connector->colorspace_property, 0);
+		drm_connector_attach_colorspace_property(connector);
 }
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 1f51d73ca715..714d1a01c065 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1671,6 +1671,7 @@ int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
 					       u32 scaling_mode_mask);
 int drm_connector_attach_vrr_capable_property(
 		struct drm_connector *connector);
+int drm_connector_attach_colorspace_property(struct drm_connector *connector);
 int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *connector);
 bool drm_connector_atomic_hdr_metadata_equal(struct drm_connector_state *old_state,
 					     struct drm_connector_state *new_state);
-- 
2.31.1