linux-kernel - [PATCH v4 02/17] drm/nouveau/kms/nv50-: Move AUX adapter reg to connector late register/early unregister

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Message-Id: <20210423184309.207645-3-lyude@redhat.com>
Date:   Fri, 23 Apr 2021 14:42:54 -0400
From:   Lyude Paul <lyude@...hat.com>
To:     dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        nouveau@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org,
        Ville Syrjälä 
        <ville.syrjala@...ux.intel.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Thierry Reding <thierry.reding@...il.com>
Cc:     Ben Skeggs <bskeggs@...hat.com>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v4 02/17] drm/nouveau/kms/nv50-: Move AUX adapter reg to connector late register/early unregister

Since AUX adapters on nouveau have their respective DRM connectors as
parents, we need to make sure that we register then after their connectors.

Signed-off-by: Lyude Paul <lyude@...hat.com>
---
 drivers/gpu/drm/nouveau/nouveau_connector.c | 25 ++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 61e6d7412505..c04044be3d32 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -401,7 +401,6 @@ nouveau_connector_destroy(struct drm_connector *connector)
 	drm_connector_cleanup(connector);
 	if (nv_connector->aux.transfer) {
 		drm_dp_cec_unregister_connector(&nv_connector->aux);
-		drm_dp_aux_unregister(&nv_connector->aux);
 		kfree(nv_connector->aux.name);
 	}
 	kfree(connector);
@@ -905,13 +904,29 @@ nouveau_connector_late_register(struct drm_connector *connector)
 	int ret;
 
 	ret = nouveau_backlight_init(connector);
+	if (ret)
+		return ret;
 
+	if (connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
+	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+		ret = drm_dp_aux_register(&nouveau_connector(connector)->aux);
+		if (ret)
+			goto backlight_fini;
+	}
+
+	return 0;
+backlight_fini:
+	nouveau_backlight_fini(connector);
 	return ret;
 }
 
 static void
 nouveau_connector_early_unregister(struct drm_connector *connector)
 {
+	if (connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
+	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort)
+		drm_dp_aux_unregister(&nouveau_connector(connector)->aux);
+
 	nouveau_backlight_fini(connector);
 }
 
@@ -1343,14 +1358,14 @@ nouveau_connector_create(struct drm_device *dev,
 		snprintf(aux_name, sizeof(aux_name), "sor-%04x-%04x",
 			 dcbe->hasht, dcbe->hashm);
 		nv_connector->aux.name = kstrdup(aux_name, GFP_KERNEL);
-		ret = drm_dp_aux_register(&nv_connector->aux);
+		drm_dp_aux_init(&nv_connector->aux);
 		if (ret) {
-			NV_ERROR(drm, "failed to register aux channel\n");
+			NV_ERROR(drm, "Failed to init AUX adapter for sor-%04x-%04x: %d\n",
+				 dcbe->hasht, dcbe->hashm, ret);
 			kfree(nv_connector);
 			return ERR_PTR(ret);
 		}
-		funcs = &nouveau_connector_funcs;
-		break;
+		fallthrough;
 	default:
 		funcs = &nouveau_connector_funcs;
 		break;
-- 
2.30.2