e10bd354ad
The omap_dss_find_output_by_port() function looks up an omap_dss_device by port from the list of devices registered as outputs. In preparation for looking up sinks in addition to sources, allow the function to look up any registered device. Rename it to omap_dss_find_device_by_port() to match its new purpose. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
/*
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* Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
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* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_graph.h>
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#include <linux/seq_file.h>
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#include "omapdss.h"
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static struct device_node *
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dss_of_port_get_parent_device(struct device_node *port)
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{
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struct device_node *np;
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int i;
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if (!port)
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return NULL;
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np = of_get_parent(port);
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for (i = 0; i < 2 && np; ++i) {
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struct property *prop;
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prop = of_find_property(np, "compatible", NULL);
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if (prop)
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return np;
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np = of_get_next_parent(np);
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}
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return NULL;
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}
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struct omap_dss_device *
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omapdss_of_find_source_for_first_ep(struct device_node *node)
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{
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struct device_node *src_node;
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struct device_node *src_port;
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struct device_node *ep;
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struct omap_dss_device *src;
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u32 port_number = 0;
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/* Get the endpoint... */
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ep = of_graph_get_endpoint_by_regs(node, 0, 0);
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if (!ep)
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return ERR_PTR(-EINVAL);
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/* ... and its remote port... */
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src_port = of_graph_get_remote_port(ep);
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of_node_put(ep);
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if (!src_port)
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return ERR_PTR(-EINVAL);
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/* ... and the remote port's number and parent... */
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of_property_read_u32(src_port, "reg", &port_number);
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src_node = dss_of_port_get_parent_device(src_port);
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of_node_put(src_port);
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if (!src_node)
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return NULL;
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/* ... and finally the source. */
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src = omapdss_find_device_by_port(src_node, port_number);
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of_node_put(src_node);
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return src ? src : ERR_PTR(-EPROBE_DEFER);
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}
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EXPORT_SYMBOL_GPL(omapdss_of_find_source_for_first_ep);
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