[PATCH v6 10/22] drm/display: bridge_connector: Wire up HDMI 2.0 scrambler callbacks

[Cristian Ciocaltea <cristian.ciocaltea@collabora.com>]

Connect the bridge connector's .scrambler_src_{enable|disable}()
callbacks to the underlying bridge's .hdmi_scrambler_{enable|disable}()
funcs when DRM_BRIDGE_OP_HDMI_SCRAMBLER is advertised.

This completes the bridge connector plumbing so that the SCDC
scrambling helpers can control source-side scrambling through the
bridge chain.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
---
 drivers/gpu/drm/display/drm_bridge_connector.c | 40 +++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/display/drm_bridge_connector.c b/drivers/gpu/drm/display/drm_bridge_connector.c
index 47bb0dcf509f..6f65733b7dd9 100644
--- a/drivers/gpu/drm/display/drm_bridge_connector.c
+++ b/drivers/gpu/drm/display/drm_bridge_connector.c
@@ -548,6 +548,32 @@ static int drm_bridge_connector_write_spd_infoframe(struct drm_connector *connec
 	return bridge->funcs->hdmi_write_spd_infoframe(bridge, buffer, len);
 }
 
+static int drm_bridge_connector_scrambler_src_enable(struct drm_connector *connector)
+{
+	struct drm_bridge_connector *bridge_connector =
+		to_drm_bridge_connector(connector);
+	struct drm_bridge *bridge;
+
+	bridge = bridge_connector->bridge_hdmi;
+	if (!bridge)
+		return -EINVAL;
+
+	return bridge->funcs->hdmi_scrambler_enable(bridge);
+}
+
+static int drm_bridge_connector_scrambler_src_disable(struct drm_connector *connector)
+{
+	struct drm_bridge_connector *bridge_connector =
+		to_drm_bridge_connector(connector);
+	struct drm_bridge *bridge;
+
+	bridge = bridge_connector->bridge_hdmi;
+	if (!bridge)
+		return -EINVAL;
+
+	return bridge->funcs->hdmi_scrambler_disable(bridge);
+}
+
 static const struct drm_edid *
 drm_bridge_connector_read_edid(struct drm_connector *connector)
 {
@@ -573,7 +599,7 @@ static const struct drm_connector_hdmi_funcs drm_bridge_connector_hdmi_funcs = {
 		.clear_infoframe = drm_bridge_connector_clear_hdmi_infoframe,
 		.write_infoframe = drm_bridge_connector_write_hdmi_infoframe,
 	},
-	/* audio, hdr_drm and spd are set dynamically during init */
+	/* scrambler, audio, hdr_drm and spd are set dynamically during init */
 };
 
 static const struct drm_connector_infoframe_funcs drm_bridge_connector_hdmi_audio_infoframe = {
@@ -879,6 +905,11 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
 			     !bridge->funcs->hdmi_clear_spd_infoframe))
 				return ERR_PTR(-EINVAL);
 
+			if (bridge->ops & DRM_BRIDGE_OP_HDMI_SCRAMBLER &&
+			    (!bridge->funcs->hdmi_scrambler_enable ||
+			     !bridge->funcs->hdmi_scrambler_disable))
+				return ERR_PTR(-EINVAL);
+
 			bridge_connector->bridge_hdmi = drm_bridge_get(bridge);
 
 			if (bridge->supported_formats)
@@ -983,6 +1014,13 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
 			bridge_connector->hdmi_funcs.spd =
 				drm_bridge_connector_hdmi_spd_infoframe;
 
+		if (bridge_connector->bridge_hdmi->ops & DRM_BRIDGE_OP_HDMI_SCRAMBLER) {
+			bridge_connector->hdmi_funcs.scrambler_src_enable =
+				drm_bridge_connector_scrambler_src_enable;
+			bridge_connector->hdmi_funcs.scrambler_src_disable =
+				drm_bridge_connector_scrambler_src_disable;
+		}
+
 		ret = drmm_connector_hdmi_init(drm, connector,
 					       bridge_connector->bridge_hdmi->vendor,
 					       bridge_connector->bridge_hdmi->product,

-- 
2.53.0