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8#include <drm/drmP.h>
9#include <drm/drm_atomic_helper.h>
10#include <drm/drm_dp_helper.h>
11#include <drm/drm_panel.h>
12#include <drm/drm_of.h>
13#include <drm/drm_probe_helper.h>
14
15#include <linux/component.h>
16#include <linux/of_graph.h>
17
18#include "rockchip_drm_drv.h"
19#include "rockchip_drm_vop.h"
20
21#define encoder_to_rgb(c) container_of(c, struct rockchip_rgb, encoder)
22
23struct rockchip_rgb {
24 struct device *dev;
25 struct drm_device *drm_dev;
26 struct drm_bridge *bridge;
27 struct drm_encoder encoder;
28 int output_mode;
29};
30
31static int
32rockchip_rgb_encoder_atomic_check(struct drm_encoder *encoder,
33 struct drm_crtc_state *crtc_state,
34 struct drm_connector_state *conn_state)
35{
36 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
37 struct drm_connector *connector = conn_state->connector;
38 struct drm_display_info *info = &connector->display_info;
39 u32 bus_format;
40
41 if (info->num_bus_formats)
42 bus_format = info->bus_formats[0];
43 else
44 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
45
46 switch (bus_format) {
47 case MEDIA_BUS_FMT_RGB666_1X18:
48 s->output_mode = ROCKCHIP_OUT_MODE_P666;
49 break;
50 case MEDIA_BUS_FMT_RGB565_1X16:
51 s->output_mode = ROCKCHIP_OUT_MODE_P565;
52 break;
53 case MEDIA_BUS_FMT_RGB888_1X24:
54 case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
55 default:
56 s->output_mode = ROCKCHIP_OUT_MODE_P888;
57 break;
58 }
59
60 s->output_type = DRM_MODE_CONNECTOR_LVDS;
61
62 return 0;
63}
64
65static const
66struct drm_encoder_helper_funcs rockchip_rgb_encoder_helper_funcs = {
67 .atomic_check = rockchip_rgb_encoder_atomic_check,
68};
69
70static const struct drm_encoder_funcs rockchip_rgb_encoder_funcs = {
71 .destroy = drm_encoder_cleanup,
72};
73
74struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
75 struct drm_crtc *crtc,
76 struct drm_device *drm_dev)
77{
78 struct rockchip_rgb *rgb;
79 struct drm_encoder *encoder;
80 struct device_node *port, *endpoint;
81 u32 endpoint_id;
82 int ret = 0, child_count = 0;
83 struct drm_panel *panel;
84 struct drm_bridge *bridge;
85
86 rgb = devm_kzalloc(dev, sizeof(*rgb), GFP_KERNEL);
87 if (!rgb)
88 return ERR_PTR(-ENOMEM);
89
90 rgb->dev = dev;
91 rgb->drm_dev = drm_dev;
92
93 port = of_graph_get_port_by_id(dev->of_node, 0);
94 if (!port)
95 return ERR_PTR(-EINVAL);
96
97 for_each_child_of_node(port, endpoint) {
98 if (of_property_read_u32(endpoint, "reg", &endpoint_id))
99 endpoint_id = 0;
100
101 if (rockchip_drm_endpoint_is_subdriver(endpoint) > 0)
102 continue;
103
104 child_count++;
105 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, endpoint_id,
106 &panel, &bridge);
107 if (!ret) {
108 of_node_put(endpoint);
109 break;
110 }
111 }
112
113 of_node_put(port);
114
115
116 if (!child_count)
117 return NULL;
118
119 if (ret < 0) {
120 if (ret != -EPROBE_DEFER)
121 DRM_DEV_ERROR(dev, "failed to find panel or bridge %d\n", ret);
122 return ERR_PTR(ret);
123 }
124
125 encoder = &rgb->encoder;
126 encoder->possible_crtcs = drm_crtc_mask(crtc);
127
128 ret = drm_encoder_init(drm_dev, encoder, &rockchip_rgb_encoder_funcs,
129 DRM_MODE_ENCODER_NONE, NULL);
130 if (ret < 0) {
131 DRM_DEV_ERROR(drm_dev->dev,
132 "failed to initialize encoder: %d\n", ret);
133 return ERR_PTR(ret);
134 }
135
136 drm_encoder_helper_add(encoder, &rockchip_rgb_encoder_helper_funcs);
137
138 if (panel) {
139 bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_LVDS);
140 if (IS_ERR(bridge))
141 return ERR_CAST(bridge);
142 }
143
144 rgb->bridge = bridge;
145
146 ret = drm_bridge_attach(encoder, rgb->bridge, NULL);
147 if (ret) {
148 DRM_DEV_ERROR(drm_dev->dev,
149 "failed to attach bridge: %d\n", ret);
150 goto err_free_encoder;
151 }
152
153 return rgb;
154
155err_free_encoder:
156 drm_encoder_cleanup(encoder);
157 return ERR_PTR(ret);
158}
159EXPORT_SYMBOL_GPL(rockchip_rgb_init);
160
161void rockchip_rgb_fini(struct rockchip_rgb *rgb)
162{
163 drm_panel_bridge_remove(rgb->bridge);
164 drm_encoder_cleanup(&rgb->encoder);
165}
166EXPORT_SYMBOL_GPL(rockchip_rgb_fini);
167
