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8#include <linux/component.h>
9#include <linux/of_graph.h>
10
11#include <drm/display/drm_dp_helper.h>
12#include <drm/drm_atomic_helper.h>
13#include <drm/drm_bridge.h>
14#include <drm/drm_bridge_connector.h>
15#include <drm/drm_of.h>
16#include <drm/drm_panel.h>
17#include <drm/drm_probe_helper.h>
18#include <drm/drm_simple_kms_helper.h>
19
20#include "rockchip_drm_drv.h"
21#include "rockchip_drm_vop.h"
22#include "rockchip_rgb.h"
23
24#define encoder_to_rgb(c) container_of(c, struct rockchip_rgb, encoder)
25
26struct rockchip_rgb {
27 struct device *dev;
28 struct drm_device *drm_dev;
29 struct drm_bridge *bridge;
30 struct drm_encoder encoder;
31 struct drm_connector connector;
32 int output_mode;
33};
34
35static int
36rockchip_rgb_encoder_atomic_check(struct drm_encoder *encoder,
37 struct drm_crtc_state *crtc_state,
38 struct drm_connector_state *conn_state)
39{
40 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
41 struct drm_connector *connector = conn_state->connector;
42 struct drm_display_info *info = &connector->display_info;
43 u32 bus_format;
44
45 if (info->num_bus_formats)
46 bus_format = info->bus_formats[0];
47 else
48 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
49
50 switch (bus_format) {
51 case MEDIA_BUS_FMT_RGB666_1X18:
52 s->output_mode = ROCKCHIP_OUT_MODE_P666;
53 break;
54 case MEDIA_BUS_FMT_RGB565_1X16:
55 s->output_mode = ROCKCHIP_OUT_MODE_P565;
56 break;
57 case MEDIA_BUS_FMT_RGB888_1X24:
58 case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
59 default:
60 s->output_mode = ROCKCHIP_OUT_MODE_P888;
61 break;
62 }
63
64 s->output_type = DRM_MODE_CONNECTOR_LVDS;
65
66 return 0;
67}
68
69static const
70struct drm_encoder_helper_funcs rockchip_rgb_encoder_helper_funcs = {
71 .atomic_check = rockchip_rgb_encoder_atomic_check,
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 struct drm_connector *connector;
86
87 rgb = devm_kzalloc(dev, sizeof(*rgb), GFP_KERNEL);
88 if (!rgb)
89 return ERR_PTR(-ENOMEM);
90
91 rgb->dev = dev;
92 rgb->drm_dev = drm_dev;
93
94 port = of_graph_get_port_by_id(dev->of_node, 0);
95 if (!port)
96 return ERR_PTR(-EINVAL);
97
98 for_each_child_of_node(port, endpoint) {
99 if (of_property_read_u32(endpoint, "reg", &endpoint_id))
100 endpoint_id = 0;
101
102
103 if (rockchip_drm_endpoint_is_subdriver(endpoint) != 0)
104 continue;
105
106 child_count++;
107 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, endpoint_id,
108 &panel, &bridge);
109 if (!ret) {
110 of_node_put(endpoint);
111 break;
112 }
113 }
114
115 of_node_put(port);
116
117
118 if (!child_count)
119 return NULL;
120
121 if (ret < 0) {
122 if (ret != -EPROBE_DEFER)
123 DRM_DEV_ERROR(dev, "failed to find panel or bridge %d\n", ret);
124 return ERR_PTR(ret);
125 }
126
127 encoder = &rgb->encoder;
128 encoder->possible_crtcs = drm_crtc_mask(crtc);
129
130 ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_NONE);
131 if (ret < 0) {
132 DRM_DEV_ERROR(drm_dev->dev,
133 "failed to initialize encoder: %d\n", ret);
134 return ERR_PTR(ret);
135 }
136
137 drm_encoder_helper_add(encoder, &rockchip_rgb_encoder_helper_funcs);
138
139 if (panel) {
140 bridge = drm_panel_bridge_add_typed(panel,
141 DRM_MODE_CONNECTOR_LVDS);
142 if (IS_ERR(bridge))
143 return ERR_CAST(bridge);
144 }
145
146 rgb->bridge = bridge;
147
148 ret = drm_bridge_attach(encoder, rgb->bridge, NULL,
149 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
150 if (ret)
151 goto err_free_encoder;
152
153 connector = &rgb->connector;
154 connector = drm_bridge_connector_init(rgb->drm_dev, encoder);
155 if (IS_ERR(connector)) {
156 DRM_DEV_ERROR(drm_dev->dev,
157 "failed to initialize bridge connector: %pe\n",
158 connector);
159 ret = PTR_ERR(connector);
160 goto err_free_encoder;
161 }
162
163 ret = drm_connector_attach_encoder(connector, encoder);
164 if (ret < 0) {
165 DRM_DEV_ERROR(drm_dev->dev,
166 "failed to attach encoder: %d\n", ret);
167 goto err_free_connector;
168 }
169
170 return rgb;
171
172err_free_connector:
173 drm_connector_cleanup(connector);
174err_free_encoder:
175 drm_encoder_cleanup(encoder);
176 return ERR_PTR(ret);
177}
178EXPORT_SYMBOL_GPL(rockchip_rgb_init);
179
180void rockchip_rgb_fini(struct rockchip_rgb *rgb)
181{
182 drm_panel_bridge_remove(rgb->bridge);
183 drm_connector_cleanup(&rgb->connector);
184 drm_encoder_cleanup(&rgb->encoder);
185}
186EXPORT_SYMBOL_GPL(rockchip_rgb_fini);
187
