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