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
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->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
72 error:
73 omapdss_device_cleanup_output(out);
74 return ret;
75 }
76
omapdss_device_cleanup_output(struct omap_dss_device * out)77 void 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
dss_mgr_set_timings(struct omap_dss_device * dssdev,const struct videomode * vm)84 void 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
dss_mgr_set_lcd_config(struct omap_dss_device * dssdev,const struct dss_lcd_mgr_config * config)91 void 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
dss_mgr_enable(struct omap_dss_device * dssdev)98 int 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
dss_mgr_disable(struct omap_dss_device * dssdev)104 void 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
dss_mgr_start_update(struct omap_dss_device * dssdev)110 void 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
dss_mgr_register_framedone_handler(struct omap_dss_device * dssdev,void (* handler)(void *),void * data)116 int 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
dss_mgr_unregister_framedone_handler(struct omap_dss_device * dssdev,void (* handler)(void *),void * data)126 void 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