drm/rockchip: dw-mipi-dsi: modify the way to find the panel node

Change-Id: Ib88c11d5c44d9dc465604ddf9b00e361ff7ac958
Signed-off-by: Jerry Xu <xbl@rock-chips.com>

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index b4628df73270e93b7a494d692d70941cac0fb99b..33fc1cd438ca55cfbd0765f3d4e3d853956086fb 100644 (file)
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -661,6 +661,9 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
        struct dw_mipi_dsi *dsi = host_to_dsi(host);
        int lanes;
 
+       if (dsi->master)
+               return 0;
+
        lanes = dsi->slave ? device->lanes / 2 : device->lanes;
 
        if (lanes > dsi->pdata->max_data_lanes) {
@@ -686,6 +689,12 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
                dsi->slave->mode_flags = device->mode_flags;
        }
 
+       dsi->panel = of_drm_find_panel(device->dev.of_node);
+       if (!dsi->panel) {
+               DRM_ERROR("failed to find panel\n");
+               return -ENODEV;
+       }
+
        return 0;
 }
 
@@ -1400,7 +1409,6 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
        if (dsi->master)
                return 0;
 
-       dsi->panel = of_drm_find_panel(dsi->panel_node);
        if (!dsi->panel)
                return -EPROBE_DEFER;
 
@@ -1434,26 +1442,6 @@ static const struct component_ops dw_mipi_dsi_ops = {
        .unbind = dw_mipi_dsi_unbind,
 };
 
-static int rockchip_dsi_parse_dt(struct dw_mipi_dsi *dsi)
-{
-       struct device_node *np = dsi->dev->of_node;
-       struct device_node *endpoint, *remote = NULL;
-
-       endpoint = of_graph_get_endpoint_by_regs(np, 1, -1);
-       if (endpoint) {
-               remote = of_graph_get_remote_port_parent(endpoint);
-               of_node_put(endpoint);
-               if (!remote) {
-                       dev_err(dsi->dev, "No panel/bridge connected\n");
-                       return -ENODEV;
-               }
-       }
-
-       dsi->panel_node = remote;
-
-       return 0;
-}
-
 static int rockchip_dsi_get_reset_handle(struct dw_mipi_dsi *dsi)
 {
        struct device *dev = dsi->dev;
@@ -1580,7 +1568,6 @@ static int dw_mipi_dsi_probe(struct platform_device *pdev)
        dsi->dev = dev;
        dsi->pdata = pdata;
 
-       rockchip_dsi_parse_dt(dsi);
        rockchip_dsi_ioremap_resource(pdev, dsi);
        rockchip_dsi_clk_get(dsi);
        rockchip_dsi_dphy_parse(dsi);