drm/msm/dsi: Move setup_encoder to modeset_init

Now that the panel probe/setup is in the modeset path, we can call
dsi_manager_setup_encoder() in a common place for both internal and
external bridge setups.
Reviewed-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190617201301.133275-10-sean@poorly.run

drivers/gpu/drm/msm/dsi/dsi.c

@@ -250,6 +250,8 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
 		goto fail;
 	}
 
+	msm_dsi_manager_setup_encoder(msm_dsi->id);
+
 	priv->bridges[priv->num_bridges++]       = msm_dsi->bridge;
 	priv->connectors[priv->num_connectors++] = msm_dsi->connector;
 

drivers/gpu/drm/msm/dsi/dsi.h

@@ -96,7 +96,7 @@ struct drm_connector *msm_dsi_manager_connector_init(u8 id);
 struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id);
 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg);
 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len);
-void msm_dsi_manager_attach_dsi_device(int id);
+void msm_dsi_manager_setup_encoder(int id);
 int msm_dsi_manager_register(struct msm_dsi *msm_dsi);
 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi);
 bool msm_dsi_manager_validate_current_config(u8 id);

drivers/gpu/drm/msm/dsi/dsi_host.c

@@ -1598,8 +1598,6 @@ static int dsi_host_attach(struct mipi_dsi_host *host,
 	msm_host->format = dsi->format;
 	msm_host->mode_flags = dsi->mode_flags;
 
-	msm_dsi_manager_attach_dsi_device(msm_host->id);
-
 	/* Some gpios defined in panel DT need to be controlled by host */
 	ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev);
 	if (ret)

drivers/gpu/drm/msm/dsi/dsi_manager.c

@@ -239,7 +239,7 @@ static bool dsi_mgr_is_cmd_mode(struct msm_dsi *msm_dsi)
 	return !(host_flags & MIPI_DSI_MODE_VIDEO);
 }
 
-static void msm_dsi_manager_setup_encoder(int id)
+void msm_dsi_manager_setup_encoder(int id)
 {
 	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 	struct msm_drm_private *priv = msm_dsi->dev->dev_private;
@@ -280,12 +280,7 @@ static int msm_dsi_manager_panel_init(struct drm_connector *conn, u8 id)
 		return PTR_ERR(panel);
 	}
 
-	if (!panel)
-		return 0;
-
-	msm_dsi_manager_setup_encoder(id);
-
-	if (!IS_DUAL_DSI())
+	if (!panel || !IS_DUAL_DSI())
 		goto out;
 
 	drm_object_attach_property(&conn->base,
@@ -790,34 +785,6 @@ bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
 	return true;
 }
 
-void msm_dsi_manager_attach_dsi_device(int id)
-{
-	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
-	struct drm_device *dev;
-
-	/*
-	 * drm_device pointer is assigned to msm_dsi only in the modeset_init
-	 * path. If mipi_dsi_attach() happens in DSI driver's probe path
-	 * (generally the case when we're connected to a drm_panel of the type
-	 * mipi_dsi_device), this would be NULL. In such cases, try to set the
-	 * encoder mode in the DSI connector's detect() op.
-	 *
-	 * msm_dsi pointer is assigned to a valid dsi device only when
-	 * msm_dsi_manager_register() succeeds. When panel hasnt probed yet
-	 * dsi_mgr_setup_components() could potentially return -EDEFER and
-	 * assign the msm_dsi->dev to NULL. When the panel now probes and calls
-	 * mipi_dsi_attach(), this will call msm_dsi_manager_attach_dsi_device()
-	 * which will result in a NULL pointer dereference
-	 */
-
-	dev = msm_dsi ? msm_dsi->dev : NULL;
-
-	if (!dev)
-		return;
-
-	msm_dsi_manager_setup_encoder(id);
-}
-
 int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
 {
 	struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;