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From:   Maxime Ripard <maxime@cerno.tech>
To:     Thierry Reding <thierry.reding@gmail.com>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        Andrzej Hajda <a.hajda@samsung.com>,
        Robert Foss <robert.foss@linaro.org>,
        Jonas Karlman <jonas@kwiboo.se>,
        Daniel Vetter <daniel.vetter@intel.com>,
        David Airlie <airlied@linux.ie>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        Maxime Ripard <maxime@cerno.tech>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        Sam Ravnborg <sam@ravnborg.org>,
        Neil Armstrong <narmstrong@baylibre.com>
Cc:     Seung-Woo Kim <sw0312.kim@samsung.com>,
        linux-arm-msm@vger.kernel.org,
        Joonyoung Shim <jy0922.shim@samsung.com>,
        Rob Clark <robdclark@gmail.com>,
        Tian Tao <tiantao6@hisilicon.com>,
        Chen Feng <puck.chen@hisilicon.com>,
        Xinwei Kong <kong.kongxinwei@hisilicon.com>,
        Kyungmin Park <kyungmin.park@samsung.com>,
        linux-samsung-soc@vger.kernel.org,
        Xinliang Liu <xinliang.liu@linaro.org>,
        John Stultz <john.stultz@linaro.org>,
        linux-kernel@vger.kernel.org, Inki Dae <inki.dae@samsung.com>,
        dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org,
        Sean Paul <sean@poorly.run>
Subject: [PATCH v6 06/21] drm/bridge: lt8912b: Register and attach our DSI device at probe
Date:   Mon, 25 Oct 2021 17:15:21 +0200
Message-Id: <20211025151536.1048186-7-maxime@cerno.tech>
In-Reply-To: <20211025151536.1048186-1-maxime@cerno.tech>
References: <20211025151536.1048186-1-maxime@cerno.tech>
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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>
---
 drivers/gpu/drm/bridge/lontium-lt8912b.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index cc968d65936b..c642d1e02b2f 100644
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -544,10 +544,6 @@ static int lt8912_bridge_attach(struct drm_bridge *bridge,
 	if (ret)
 		goto error;
 
-	ret = lt8912_attach_dsi(lt);
-	if (ret)
-		goto error;
-
 	lt->is_attached = true;
 
 	return 0;
@@ -706,8 +702,15 @@ static int lt8912_probe(struct i2c_client *client,
 
 	drm_bridge_add(&lt->bridge);
 
+	ret = lt8912_attach_dsi(lt);
+	if (ret)
+		goto err_attach;
+
 	return 0;
 
+err_attach:
+	drm_bridge_remove(&lt->bridge);
+	lt8912_free_i2c(lt);
 err_i2c:
 	lt8912_put_dt(lt);
 err_dt_parse:
-- 
2.31.1