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
omapdss_device_init_output(struct omap_dss_device * out,struct drm_bridge * local_bridge)20 int 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
79 error:
80 omapdss_device_cleanup_output(out);
81 out->next = NULL;
82 return ret;
83 }
84 EXPORT_SYMBOL(omapdss_device_init_output);
85
omapdss_device_cleanup_output(struct omap_dss_device * out)86 void 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 }
95 EXPORT_SYMBOL(omapdss_device_cleanup_output);
96
dss_install_mgr_ops(struct dss_device * dss,const struct dss_mgr_ops * mgr_ops,struct omap_drm_private * priv)97 int 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 }
109 EXPORT_SYMBOL(dss_install_mgr_ops);
110
dss_uninstall_mgr_ops(struct dss_device * dss)111 void dss_uninstall_mgr_ops(struct dss_device *dss)
112 {
113 dss->mgr_ops = NULL;
114 dss->mgr_ops_priv = NULL;
115 }
116 EXPORT_SYMBOL(dss_uninstall_mgr_ops);
117
dss_mgr_set_timings(struct omap_dss_device * dssdev,const struct videomode * vm)118 void 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 }
124 EXPORT_SYMBOL(dss_mgr_set_timings);
125
dss_mgr_set_lcd_config(struct omap_dss_device * dssdev,const struct dss_lcd_mgr_config * config)126 void 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 }
132 EXPORT_SYMBOL(dss_mgr_set_lcd_config);
133
dss_mgr_enable(struct omap_dss_device * dssdev)134 int 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 }
139 EXPORT_SYMBOL(dss_mgr_enable);
140
dss_mgr_disable(struct omap_dss_device * dssdev)141 void 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 }
146 EXPORT_SYMBOL(dss_mgr_disable);
147
dss_mgr_start_update(struct omap_dss_device * dssdev)148 void 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 }
153 EXPORT_SYMBOL(dss_mgr_start_update);
154
dss_mgr_register_framedone_handler(struct omap_dss_device * dssdev,void (* handler)(void *),void * data)155 int 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 }
164 EXPORT_SYMBOL(dss_mgr_register_framedone_handler);
165
dss_mgr_unregister_framedone_handler(struct omap_dss_device * dssdev,void (* handler)(void *),void * data)166 void 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 }
175 EXPORT_SYMBOL(dss_mgr_unregister_framedone_handler);
176