1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Texas Instruments Incorporated - https://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->bridge = of_drm_find_bridge(remote_node);
34	out->panel = of_drm_find_panel(remote_node);
35	if (IS_ERR(out->panel))
36		out->panel = NULL;
37
38	of_node_put(remote_node);
39
40	if (out->panel) {
41		struct drm_bridge *bridge;
42
43		bridge = drm_panel_bridge_add(out->panel);
44		if (IS_ERR(bridge)) {
45			dev_err(out->dev,
46				"unable to create panel bridge (%ld)\n",
47				PTR_ERR(bridge));
48			ret = PTR_ERR(bridge);
49			goto error;
50		}
51
52		out->bridge = bridge;
53	}
54
55	if (local_bridge) {
56		if (!out->bridge) {
57			ret = -EPROBE_DEFER;
58			goto error;
59		}
60
61		out->next_bridge = out->bridge;
62		out->bridge = local_bridge;
63	}
64
65	if (!out->bridge) {
66		ret = -EPROBE_DEFER;
67		goto error;
68	}
69
70	return 0;
71
72error:
73	omapdss_device_cleanup_output(out);
74	return ret;
75}
76
77void omapdss_device_cleanup_output(struct omap_dss_device *out)
78{
79	if (out->bridge && out->panel)
80		drm_panel_bridge_remove(out->next_bridge ?
81					out->next_bridge : out->bridge);
82}
83
84void dss_mgr_set_timings(struct omap_dss_device *dssdev,
85			 const struct videomode *vm)
86{
87	omap_crtc_dss_set_timings(dssdev->dss->mgr_ops_priv,
88					  dssdev->dispc_channel, vm);
89}
90
91void dss_mgr_set_lcd_config(struct omap_dss_device *dssdev,
92		const struct dss_lcd_mgr_config *config)
93{
94	omap_crtc_dss_set_lcd_config(dssdev->dss->mgr_ops_priv,
95					     dssdev->dispc_channel, config);
96}
97
98int dss_mgr_enable(struct omap_dss_device *dssdev)
99{
100	return omap_crtc_dss_enable(dssdev->dss->mgr_ops_priv,
101					    dssdev->dispc_channel);
102}
103
104void dss_mgr_disable(struct omap_dss_device *dssdev)
105{
106	omap_crtc_dss_disable(dssdev->dss->mgr_ops_priv,
107				      dssdev->dispc_channel);
108}
109
110void dss_mgr_start_update(struct omap_dss_device *dssdev)
111{
112	omap_crtc_dss_start_update(dssdev->dss->mgr_ops_priv,
113					   dssdev->dispc_channel);
114}
115
116int dss_mgr_register_framedone_handler(struct omap_dss_device *dssdev,
117		void (*handler)(void *), void *data)
118{
119	struct dss_device *dss = dssdev->dss;
120
121	return omap_crtc_dss_register_framedone(dss->mgr_ops_priv,
122							dssdev->dispc_channel,
123							handler, data);
124}
125
126void dss_mgr_unregister_framedone_handler(struct omap_dss_device *dssdev,
127		void (*handler)(void *), void *data)
128{
129	struct dss_device *dss = dssdev->dss;
130
131	omap_crtc_dss_unregister_framedone(dss->mgr_ops_priv,
132						   dssdev->dispc_channel,
133						   handler, data);
134}
135