drm/imx: Remove of_node assignment from ipuv3-crtc driver probe

The crtc child device driver shouldn't modify the of_node of its platform
device in the probe function. Instead, since the previous patch, the IPU
core driver sets the of_node when the platform device is created.

Drop the now unused custom imx_drm_get_port_by_id function.

Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/drivers/gpu/drm/imx/ipuv3-crtc.c b/drivers/gpu/drm/imx/ipuv3-crtc.c
index 4cbc3df8ac96814402c309eeb0e6b09753327a82..67813ca2a87cf08278d18b0c3a4e16c82de97090 100644 (file)
--- a/drivers/gpu/drm/imx/ipuv3-crtc.c
+++ b/drivers/gpu/drm/imx/ipuv3-crtc.c
@@ -411,28 +411,6 @@ err_put_resources:
        return ret;
 }
 
-static struct device_node *ipu_drm_get_port_by_id(struct device_node *parent,
-                                                 int port_id)
-{
-       struct device_node *port;
-       int id, ret;
-
-       port = of_get_child_by_name(parent, "port");
-       while (port) {
-               ret = of_property_read_u32(port, "reg", &id);
-               if (!ret && id == port_id)
-                       return port;
-
-               do {
-                       port = of_get_next_child(parent, port);
-                       if (!port)
-                               return NULL;
-               } while (of_node_cmp(port->name, "port"));
-       }
-
-       return NULL;
-}
-
 static int ipu_drm_bind(struct device *dev, struct device *master, void *data)
 {
        struct ipu_client_platformdata *pdata = dev->platform_data;
@@ -474,23 +452,11 @@ static const struct component_ops ipu_crtc_ops = {
 static int ipu_drm_probe(struct platform_device *pdev)
 {
        struct device *dev = &pdev->dev;
-       struct ipu_client_platformdata *pdata = dev->platform_data;
        int ret;
 
        if (!dev->platform_data)
                return -EINVAL;
 
-       if (!dev->of_node) {
-               /* Associate crtc device with the corresponding DI port node */
-               dev->of_node = ipu_drm_get_port_by_id(dev->parent->of_node,
-                                                     pdata->di + 2);
-               if (!dev->of_node) {
-                       dev_err(dev, "missing port@%d node in %s\n",
-                               pdata->di + 2, dev->parent->of_node->full_name);
-                       return -ENODEV;
-               }
-       }
-
        ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
        if (ret)
                return ret;