1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
4 * Author: Archit Taneja <archit@ti.com>
5 */
6
7#include <linux/kernel.h>
8#include <linux/module.h>
9#include <linux/platform_device.h>
10#include <linux/slab.h>
11#include <linux/of.h>
12#include <linux/of_graph.h>
13
14#include <drm/drm_bridge.h>
15#include <drm/drm_panel.h>
16
17#include "dss.h"
18#include "omapdss.h"
19
20int omapdss_device_init_output(struct omap_dss_device *out,
21			       struct drm_bridge *local_bridge)
22{
23	struct device_node *remote_node;
24	int ret;
25
26	remote_node = of_graph_get_remote_node(out->dev->of_node,
27					       out->of_port, 0);
28	if (!remote_node) {
29		dev_dbg(out->dev, "failed to find video sink\n");
30		return 0;
31	}
32
33	out->next = omapdss_find_device_by_node(remote_node);
34	out->bridge = of_drm_find_bridge(remote_node);
35	out->panel = of_drm_find_panel(remote_node);
36	if (IS_ERR(out->panel))
37		out->panel = NULL;
38
39	of_node_put(remote_node);
40
41	if (out->next && out->type != out->next->type) {
42		dev_err(out->dev, "output type and display type don't match\n");
43		ret = -EINVAL;
44		goto error;
45	}
46
47	if (out->panel) {
48		struct drm_bridge *bridge;
49
50		bridge = drm_panel_bridge_add(out->panel);
51		if (IS_ERR(bridge)) {
52			dev_err(out->dev,
53				"unable to create panel bridge (%ld)\n",
54				PTR_ERR(bridge));
55			ret = PTR_ERR(bridge);
56			goto error;
57		}
58
59		out->bridge = bridge;
60	}
61
62	if (local_bridge) {
63		if (!out->bridge) {
64			ret = -EPROBE_DEFER;
65			goto error;
66		}
67
68		out->next_bridge = out->bridge;
69		out->bridge = local_bridge;
70	}
71
72	if (!out->next && !out->bridge) {
73		ret = -EPROBE_DEFER;
74		goto error;
75	}
76
77	return 0;
78
79error:
80	omapdss_device_cleanup_output(out);
81	out->next = NULL;
82	return ret;
83}
84EXPORT_SYMBOL(omapdss_device_init_output);
85
86void omapdss_device_cleanup_output(struct omap_dss_device *out)
87{
88	if (out->bridge && out->panel)
89		drm_panel_bridge_remove(out->next_bridge ?
90					out->next_bridge : out->bridge);
91
92	if (out->next)
93		omapdss_device_put(out->next);
94}
95EXPORT_SYMBOL(omapdss_device_cleanup_output);
96
97int dss_install_mgr_ops(struct dss_device *dss,
98			const struct dss_mgr_ops *mgr_ops,
99			struct omap_drm_private *priv)
100{
101	if (dss->mgr_ops)
102		return -EBUSY;
103
104	dss->mgr_ops = mgr_ops;
105	dss->mgr_ops_priv = priv;
106
107	return 0;
108}
109EXPORT_SYMBOL(dss_install_mgr_ops);
110
111void dss_uninstall_mgr_ops(struct dss_device *dss)
112{
113	dss->mgr_ops = NULL;
114	dss->mgr_ops_priv = NULL;
115}
116EXPORT_SYMBOL(dss_uninstall_mgr_ops);
117
118void dss_mgr_set_timings(struct omap_dss_device *dssdev,
119			 const struct videomode *vm)
120{
121	dssdev->dss->mgr_ops->set_timings(dssdev->dss->mgr_ops_priv,
122					  dssdev->dispc_channel, vm);
123}
124EXPORT_SYMBOL(dss_mgr_set_timings);
125
126void dss_mgr_set_lcd_config(struct omap_dss_device *dssdev,
127		const struct dss_lcd_mgr_config *config)
128{
129	dssdev->dss->mgr_ops->set_lcd_config(dssdev->dss->mgr_ops_priv,
130					     dssdev->dispc_channel, config);
131}
132EXPORT_SYMBOL(dss_mgr_set_lcd_config);
133
134int dss_mgr_enable(struct omap_dss_device *dssdev)
135{
136	return dssdev->dss->mgr_ops->enable(dssdev->dss->mgr_ops_priv,
137					    dssdev->dispc_channel);
138}
139EXPORT_SYMBOL(dss_mgr_enable);
140
141void dss_mgr_disable(struct omap_dss_device *dssdev)
142{
143	dssdev->dss->mgr_ops->disable(dssdev->dss->mgr_ops_priv,
144				      dssdev->dispc_channel);
145}
146EXPORT_SYMBOL(dss_mgr_disable);
147
148void dss_mgr_start_update(struct omap_dss_device *dssdev)
149{
150	dssdev->dss->mgr_ops->start_update(dssdev->dss->mgr_ops_priv,
151					   dssdev->dispc_channel);
152}
153EXPORT_SYMBOL(dss_mgr_start_update);
154
155int dss_mgr_register_framedone_handler(struct omap_dss_device *dssdev,
156		void (*handler)(void *), void *data)
157{
158	struct dss_device *dss = dssdev->dss;
159
160	return dss->mgr_ops->register_framedone_handler(dss->mgr_ops_priv,
161							dssdev->dispc_channel,
162							handler, data);
163}
164EXPORT_SYMBOL(dss_mgr_register_framedone_handler);
165
166void dss_mgr_unregister_framedone_handler(struct omap_dss_device *dssdev,
167		void (*handler)(void *), void *data)
168{
169	struct dss_device *dss = dssdev->dss;
170
171	dss->mgr_ops->unregister_framedone_handler(dss->mgr_ops_priv,
172						   dssdev->dispc_channel,
173						   handler, data);
174}
175EXPORT_SYMBOL(dss_mgr_unregister_framedone_handler);
176