[PATCH v3 08/21] drm/bridge: tc358767: add get_edid bride operation

[Sam Ravnborg <sam@ravnborg.org>]

Prepare for chained bridge with the addition of
get_edid support.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/bridge/tc358767.c | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index 85973ae728db..fb9d57967b2c 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -1317,6 +1317,20 @@ static void tc_bridge_mode_set(struct drm_bridge *bridge,
 	tc->mode = *mode;
 }
 
+static struct edid *tc_get_edid(struct drm_bridge *bridge,
+				struct drm_connector *connector)
+{
+	struct tc_data *tc = bridge_to_tc(bridge);
+	struct edid *edid;
+
+	edid = drm_get_edid(connector, &tc->aux.ddc);
+
+	kfree(tc->edid);
+	tc->edid = edid;
+
+	return edid;
+}
+
 static int tc_connector_get_modes(struct drm_connector *connector)
 {
 	struct tc_data *tc = connector_to_tc(connector);
@@ -1336,12 +1350,7 @@ static int tc_connector_get_modes(struct drm_connector *connector)
 			return count;
 	}
 
-	edid = drm_get_edid(connector, &tc->aux.ddc);
-
-	kfree(tc->edid);
-	tc->edid = edid;
-	if (!edid)
-		return 0;
+	edid = tc_get_edid(&tc->bridge, connector);
 
 	drm_connector_update_edid_property(connector, edid);
 	count = drm_add_edid_modes(connector, edid);
@@ -1452,6 +1461,7 @@ static const struct drm_bridge_funcs tc_bridge_funcs = {
 	.disable = tc_bridge_disable,
 	.mode_fixup = tc_bridge_mode_fixup,
 	.detect = tc_bridge_detect,
+	.get_edid = tc_get_edid,
 };
 
 static bool tc_readable_reg(struct device *dev, unsigned int reg)
@@ -1685,7 +1695,7 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
 		return ret;
 
 	tc->bridge.funcs = &tc_bridge_funcs;
-	tc->bridge.ops = DRM_BRIDGE_OP_DETECT;
+	tc->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID;
 
 	tc->bridge.of_node = dev->of_node;
 	drm_bridge_add(&tc->bridge);
-- 
2.25.1

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