From e336ec924fcd0d7bf4d06365f7fac701b0c78e56 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Mon, 25 Oct 2021 17:15:25 +0200
Subject: drm/bridge: lt9611uxc: Register and attach our DSI device at probe
Git-commit: 4a46ace5ac621c0f84b3910bc3c93acf6c93963b
Patch-mainline: v5.17-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

In order to avoid any probe ordering issue, the best practice is to move
the secondary MIPI-DSI device registration and attachment to the
MIPI-DSI host at probe time. Let's do this.

Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20211025151536.1048186-11-maxime@cerno.tech
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 31 +++++++++++++---------
 1 file changed, 19 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
index ab1a0c00aad8..33f9716da0ee 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
@@ -367,18 +367,6 @@ static int lt9611uxc_bridge_attach(struct drm_bridge *bridge,
 			return ret;
 	}
 
-	/* Attach primary DSI */
-	lt9611uxc->dsi0 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi0_node);
-	if (IS_ERR(lt9611uxc->dsi0))
-		return PTR_ERR(lt9611uxc->dsi0);
-
-	/* Attach secondary DSI, if specified */
-	if (lt9611uxc->dsi1_node) {
-		lt9611uxc->dsi1 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi1_node);
-		if (IS_ERR(lt9611uxc->dsi1))
-			return PTR_ERR(lt9611uxc->dsi1);
-	}
-
 	return 0;
 }
 
@@ -958,8 +946,27 @@ static int lt9611uxc_probe(struct i2c_client *client,
 
 	drm_bridge_add(&lt9611uxc->bridge);
 
+	/* Attach primary DSI */
+	lt9611uxc->dsi0 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi0_node);
+	if (IS_ERR(lt9611uxc->dsi0)) {
+		ret = PTR_ERR(lt9611uxc->dsi0);
+		goto err_remove_bridge;
+	}
+
+	/* Attach secondary DSI, if specified */
+	if (lt9611uxc->dsi1_node) {
+		lt9611uxc->dsi1 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi1_node);
+		if (IS_ERR(lt9611uxc->dsi1)) {
+			ret = PTR_ERR(lt9611uxc->dsi1);
+			goto err_remove_bridge;
+		}
+	}
+
 	return lt9611uxc_audio_init(dev, lt9611uxc);
 
+err_remove_bridge:
+	drm_bridge_remove(&lt9611uxc->bridge);
+
 err_disable_regulators:
 	regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies);
 
-- 
2.38.1