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drm/bridge: lvds-codec: Simplify panel DT node localisation

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The probe function needs to get ahold of the panel device tree
node, and it achieves that by using a combination of
of_graph_get_port_by_id, of_get_child_by_name, and
of_graph_get_remote_port_parent. We can achieve the same goal
by replacing those calls with a call to of_graph_get_remote_node
these days.

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1573660292-10629-8-git-send-email-fabrizio.castro@bp.renesas.com
This commit is contained in:
Fabrizio Castro 2019-11-13 15:51:26 +00:00 committed by Neil Armstrong
parent e6f607bb2b
commit 319d8e9814
1 changed files with 2 additions and 18 deletions
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20
drivers/gpu/drm/bridge/lvds-codec.c
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@ -57,8 +57,6 @@ static struct drm_bridge_funcs funcs = {
static int lvds_codec_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *port;
struct device_node *endpoint;
struct device_node *panel_node;
struct drm_panel *panel;
struct lvds_codec *lvds_codec;
@ -79,23 +77,9 @@ static int lvds_codec_probe(struct platform_device *pdev)
}
/* Locate the panel DT node. */
port = of_graph_get_port_by_id(dev->of_node, 1);
if (!port) {
dev_dbg(dev, "port 1 not found\n");
return -ENXIO;
}
endpoint = of_get_child_by_name(port, "endpoint");
of_node_put(port);
if (!endpoint) {
dev_dbg(dev, "no endpoint for port 1\n");
return -ENXIO;
}
panel_node = of_graph_get_remote_port_parent(endpoint);
of_node_put(endpoint);
panel_node = of_graph_get_remote_node(dev->of_node, 1, 0);
if (!panel_node) {
dev_dbg(dev, "no remote endpoint for port 1\n");
dev_dbg(dev, "panel DT node not found\n");
return -ENXIO;
}