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1/*
2 * Copyright (C) 2012 Texas Instruments Ltd
3 * Author: Archit Taneja <archit@ti.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/platform_device.h>
21#include <linux/slab.h>
22#include <linux/of.h>
23
24#include <video/omapdss.h>
25
26#include "dss.h"
27
28static LIST_HEAD(output_list);
29static DEFINE_MUTEX(output_lock);
30
31int omapdss_output_set_device(struct omap_dss_device *out,
32 struct omap_dss_device *dssdev)
33{
34 int r;
35
36 mutex_lock(&output_lock);
37
38 if (out->dst) {
39 DSSERR("output already has device %s connected to it\n",
40 out->dst->name);
41 r = -EINVAL;
42 goto err;
43 }
44
45 if (out->output_type != dssdev->type) {
46 DSSERR("output type and display type don't match\n");
47 r = -EINVAL;
48 goto err;
49 }
50
51 out->dst = dssdev;
52 dssdev->src = out;
53
54 mutex_unlock(&output_lock);
55
56 return 0;
57err:
58 mutex_unlock(&output_lock);
59
60 return r;
61}
62EXPORT_SYMBOL(omapdss_output_set_device);
63
64int omapdss_output_unset_device(struct omap_dss_device *out)
65{
66 int r;
67
68 mutex_lock(&output_lock);
69
70 if (!out->dst) {
71 DSSERR("output doesn't have a device connected to it\n");
72 r = -EINVAL;
73 goto err;
74 }
75
76 if (out->dst->state != OMAP_DSS_DISPLAY_DISABLED) {
77 DSSERR("device %s is not disabled, cannot unset device\n",
78 out->dst->name);
79 r = -EINVAL;
80 goto err;
81 }
82
83 out->dst->src = NULL;
84 out->dst = NULL;
85
86 mutex_unlock(&output_lock);
87
88 return 0;
89err:
90 mutex_unlock(&output_lock);
91
92 return r;
93}
94EXPORT_SYMBOL(omapdss_output_unset_device);
95
96int omapdss_register_output(struct omap_dss_device *out)
97{
98 list_add_tail(&out->list, &output_list);
99 return 0;
100}
101EXPORT_SYMBOL(omapdss_register_output);
102
103void omapdss_unregister_output(struct omap_dss_device *out)
104{
105 list_del(&out->list);
106}
107EXPORT_SYMBOL(omapdss_unregister_output);
108
109struct omap_dss_device *omap_dss_get_output(enum omap_dss_output_id id)
110{
111 struct omap_dss_device *out;
112
113 list_for_each_entry(out, &output_list, list) {
114 if (out->id == id)
115 return out;
116 }
117
118 return NULL;
119}
120EXPORT_SYMBOL(omap_dss_get_output);
121
122struct omap_dss_device *omap_dss_find_output(const char *name)
123{
124 struct omap_dss_device *out;
125
126 list_for_each_entry(out, &output_list, list) {
127 if (strcmp(out->name, name) == 0)
128 return omap_dss_get_device(out);
129 }
130
131 return NULL;
132}
133EXPORT_SYMBOL(omap_dss_find_output);
134
135struct omap_dss_device *omap_dss_find_output_by_port_node(struct device_node *port)
136{
137 struct device_node *src_node;
138 struct omap_dss_device *out;
139 u32 reg;
140
141 src_node = dss_of_port_get_parent_device(port);
142 if (!src_node)
143 return NULL;
144
145 reg = dss_of_port_get_port_number(port);
146
147 list_for_each_entry(out, &output_list, list) {
148 if (out->dev->of_node == src_node && out->port_num == reg) {
149 of_node_put(src_node);
150 return omap_dss_get_device(out);
151 }
152 }
153
154 of_node_put(src_node);
155
156 return NULL;
157}
158EXPORT_SYMBOL(omap_dss_find_output_by_port_node);
159
160struct omap_dss_device *omapdss_find_output_from_display(struct omap_dss_device *dssdev)
161{
162 while (dssdev->src)
163 dssdev = dssdev->src;
164
165 if (dssdev->id != 0)
166 return omap_dss_get_device(dssdev);
167
168 return NULL;
169}
170EXPORT_SYMBOL(omapdss_find_output_from_display);
171
172static const struct dss_mgr_ops *dss_mgr_ops;
173
174int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops)
175{
176 if (dss_mgr_ops)
177 return -EBUSY;
178
179 dss_mgr_ops = mgr_ops;
180
181 return 0;
182}
183EXPORT_SYMBOL(dss_install_mgr_ops);
184
185void dss_uninstall_mgr_ops(void)
186{
187 dss_mgr_ops = NULL;
188}
189EXPORT_SYMBOL(dss_uninstall_mgr_ops);
190
191int dss_mgr_connect(enum omap_channel channel,
192 struct omap_dss_device *dst)
193{
194 return dss_mgr_ops->connect(channel, dst);
195}
196EXPORT_SYMBOL(dss_mgr_connect);
197
198void dss_mgr_disconnect(enum omap_channel channel,
199 struct omap_dss_device *dst)
200{
201 dss_mgr_ops->disconnect(channel, dst);
202}
203EXPORT_SYMBOL(dss_mgr_disconnect);
204
205void dss_mgr_set_timings(enum omap_channel channel,
206 const struct omap_video_timings *timings)
207{
208 dss_mgr_ops->set_timings(channel, timings);
209}
210EXPORT_SYMBOL(dss_mgr_set_timings);
211
212void dss_mgr_set_lcd_config(enum omap_channel channel,
213 const struct dss_lcd_mgr_config *config)
214{
215 dss_mgr_ops->set_lcd_config(channel, config);
216}
217EXPORT_SYMBOL(dss_mgr_set_lcd_config);
218
219int dss_mgr_enable(enum omap_channel channel)
220{
221 return dss_mgr_ops->enable(channel);
222}
223EXPORT_SYMBOL(dss_mgr_enable);
224
225void dss_mgr_disable(enum omap_channel channel)
226{
227 dss_mgr_ops->disable(channel);
228}
229EXPORT_SYMBOL(dss_mgr_disable);
230
231void dss_mgr_start_update(enum omap_channel channel)
232{
233 dss_mgr_ops->start_update(channel);
234}
235EXPORT_SYMBOL(dss_mgr_start_update);
236
237int dss_mgr_register_framedone_handler(enum omap_channel channel,
238 void (*handler)(void *), void *data)
239{
240 return dss_mgr_ops->register_framedone_handler(channel, handler, data);
241}
242EXPORT_SYMBOL(dss_mgr_register_framedone_handler);
243
244void dss_mgr_unregister_framedone_handler(enum omap_channel channel,
245 void (*handler)(void *), void *data)
246{
247 dss_mgr_ops->unregister_framedone_handler(channel, handler, data);
248}
249EXPORT_SYMBOL(dss_mgr_unregister_framedone_handler);
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}