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From:   Maxime Ripard <maxime@cerno.tech>
To:     Andrzej Hajda <a.hajda@samsung.com>,
        Sam Ravnborg <sam@ravnborg.org>,
        Daniel Vetter <daniel.vetter@intel.com>,
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        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Thomas Zimmermann <tzimmermann@suse.de>,
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        Neil Armstrong <narmstrong@baylibre.com>,
        Robert Foss <robert.foss@linaro.org>,
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Cc:     Sean Paul <sean@poorly.run>, freedreno@lists.freedesktop.org,
        Kyungmin Park <kyungmin.park@samsung.com>,
        linux-kernel@vger.kernel.org,
        Xinliang Liu <xinliang.liu@linaro.org>,
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        Tian Tao <tiantao6@hisilicon.com>,
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        linux-samsung-soc@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        Rob Clark <robdclark@gmail.com>,
        dri-devel@lists.freedesktop.org,
        John Stultz <john.stultz@linaro.org>,
        Chen Feng <puck.chen@hisilicon.com>,
        Xinwei Kong <kong.kongxinwei@hisilicon.com>,
        Joonyoung Shim <jy0922.shim@samsung.com>
Subject: [PATCH v4 08/24] drm/bridge: anx7625: Register and attach our DSI device at probe
Date:   Fri, 10 Sep 2021 12:12:02 +0200
Message-Id: <20210910101218.1632297-9-maxime@cerno.tech>
In-Reply-To: <20210910101218.1632297-1-maxime@cerno.tech>
References: <20210910101218.1632297-1-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.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 4adeb2bad03a..d0317651cd75 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -1367,12 +1367,6 @@ static int anx7625_bridge_attach(struct drm_bridge *bridge,
 		return -ENODEV;
 	}
 
-	err = anx7625_attach_dsi(ctx);
-	if (err) {
-		DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", err);
-		return err;
-	}
-
 	if (ctx->pdata.panel_bridge) {
 		err = drm_bridge_attach(bridge->encoder,
 					ctx->pdata.panel_bridge,
@@ -1845,10 +1839,24 @@ static int anx7625_i2c_probe(struct i2c_client *client,
 	platform->bridge.type = DRM_MODE_CONNECTOR_eDP;
 	drm_bridge_add(&platform->bridge);
 
+	ret = anx7625_attach_dsi(platform);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
+		goto unregister_bridge;
+	}
+
 	DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
 
 	return 0;
 
+unregister_bridge:
+	drm_bridge_remove(&platform->bridge);
+
+	if (!platform->pdata.low_power_mode)
+		pm_runtime_put_sync_suspend(&client->dev);
+
+	anx7625_unregister_i2c_dummy_clients(platform);
+
 free_wq:
 	if (platform->workqueue)
 		destroy_workqueue(platform->workqueue);
-- 
2.31.1