Loading...
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
4 * Author:
5 * Sandy Huang <hjc@rock-chips.com>
6 */
7
8#include <linux/component.h>
9#include <linux/media-bus-format.h>
10#include <linux/of_graph.h>
11
12#include <drm/display/drm_dp_helper.h>
13#include <drm/drm_atomic_helper.h>
14#include <drm/drm_bridge.h>
15#include <drm/drm_bridge_connector.h>
16#include <drm/drm_of.h>
17#include <drm/drm_panel.h>
18#include <drm/drm_probe_helper.h>
19#include <drm/drm_simple_kms_helper.h>
20
21#include "rockchip_drm_drv.h"
22#include "rockchip_rgb.h"
23
24struct rockchip_rgb {
25 struct device *dev;
26 struct drm_device *drm_dev;
27 struct drm_bridge *bridge;
28 struct rockchip_encoder encoder;
29 struct drm_connector connector;
30 int output_mode;
31};
32
33static int
34rockchip_rgb_encoder_atomic_check(struct drm_encoder *encoder,
35 struct drm_crtc_state *crtc_state,
36 struct drm_connector_state *conn_state)
37{
38 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
39 struct drm_connector *connector = conn_state->connector;
40 struct drm_display_info *info = &connector->display_info;
41 u32 bus_format;
42
43 if (info->num_bus_formats)
44 bus_format = info->bus_formats[0];
45 else
46 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
47
48 switch (bus_format) {
49 case MEDIA_BUS_FMT_RGB666_1X18:
50 s->output_mode = ROCKCHIP_OUT_MODE_P666;
51 break;
52 case MEDIA_BUS_FMT_RGB565_1X16:
53 s->output_mode = ROCKCHIP_OUT_MODE_P565;
54 break;
55 case MEDIA_BUS_FMT_RGB888_1X24:
56 case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
57 default:
58 s->output_mode = ROCKCHIP_OUT_MODE_P888;
59 break;
60 }
61
62 s->output_type = DRM_MODE_CONNECTOR_LVDS;
63
64 return 0;
65}
66
67static const
68struct drm_encoder_helper_funcs rockchip_rgb_encoder_helper_funcs = {
69 .atomic_check = rockchip_rgb_encoder_atomic_check,
70};
71
72struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
73 struct drm_crtc *crtc,
74 struct drm_device *drm_dev,
75 int video_port)
76{
77 struct rockchip_rgb *rgb;
78 struct drm_encoder *encoder;
79 struct device_node *port, *endpoint;
80 u32 endpoint_id;
81 int ret = 0, child_count = 0;
82 struct drm_panel *panel;
83 struct drm_bridge *bridge;
84 struct drm_connector *connector;
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, video_port);
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 subdriver (> 0) or error case (< 0), ignore entry */
102 if (rockchip_drm_endpoint_is_subdriver(endpoint) != 0)
103 continue;
104
105 child_count++;
106 ret = drm_of_find_panel_or_bridge(dev->of_node, video_port,
107 endpoint_id, &panel, &bridge);
108 if (!ret) {
109 of_node_put(endpoint);
110 break;
111 }
112 }
113
114 of_node_put(port);
115
116 /* if the rgb output is not connected to anything, just return */
117 if (!child_count)
118 return NULL;
119
120 if (ret < 0) {
121 if (ret != -EPROBE_DEFER)
122 DRM_DEV_ERROR(dev, "failed to find panel or bridge %d\n", ret);
123 return ERR_PTR(ret);
124 }
125
126 encoder = &rgb->encoder.encoder;
127 encoder->possible_crtcs = drm_crtc_mask(crtc);
128
129 ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_NONE);
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_typed(panel,
140 DRM_MODE_CONNECTOR_LVDS);
141 if (IS_ERR(bridge))
142 return ERR_CAST(bridge);
143 }
144
145 rgb->bridge = bridge;
146
147 ret = drm_bridge_attach(encoder, rgb->bridge, NULL,
148 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
149 if (ret)
150 goto err_free_encoder;
151
152 connector = &rgb->connector;
153 connector = drm_bridge_connector_init(rgb->drm_dev, encoder);
154 if (IS_ERR(connector)) {
155 DRM_DEV_ERROR(drm_dev->dev,
156 "failed to initialize bridge connector: %pe\n",
157 connector);
158 ret = PTR_ERR(connector);
159 goto err_free_encoder;
160 }
161
162 rgb->encoder.crtc_endpoint_id = endpoint_id;
163
164 ret = drm_connector_attach_encoder(connector, encoder);
165 if (ret < 0) {
166 DRM_DEV_ERROR(drm_dev->dev,
167 "failed to attach encoder: %d\n", ret);
168 goto err_free_connector;
169 }
170
171 return rgb;
172
173err_free_connector:
174 drm_connector_cleanup(connector);
175err_free_encoder:
176 drm_encoder_cleanup(encoder);
177 return ERR_PTR(ret);
178}
179EXPORT_SYMBOL_GPL(rockchip_rgb_init);
180
181void rockchip_rgb_fini(struct rockchip_rgb *rgb)
182{
183 drm_panel_bridge_remove(rgb->bridge);
184 drm_connector_cleanup(&rgb->connector);
185 drm_encoder_cleanup(&rgb->encoder.encoder);
186}
187EXPORT_SYMBOL_GPL(rockchip_rgb_fini);
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
4 * Author:
5 * Sandy Huang <hjc@rock-chips.com>
6 */
7
8#include <linux/component.h>
9#include <linux/of_graph.h>
10
11#include <drm/drm_atomic_helper.h>
12#include <drm/drm_bridge.h>
13#include <drm/drm_dp_helper.h>
14#include <drm/drm_of.h>
15#include <drm/drm_panel.h>
16#include <drm/drm_probe_helper.h>
17#include <drm/drm_simple_kms_helper.h>
18
19#include "rockchip_drm_drv.h"
20#include "rockchip_drm_vop.h"
21
22#define encoder_to_rgb(c) container_of(c, struct rockchip_rgb, encoder)
23
24struct rockchip_rgb {
25 struct device *dev;
26 struct drm_device *drm_dev;
27 struct drm_bridge *bridge;
28 struct drm_encoder encoder;
29 int output_mode;
30};
31
32static int
33rockchip_rgb_encoder_atomic_check(struct drm_encoder *encoder,
34 struct drm_crtc_state *crtc_state,
35 struct drm_connector_state *conn_state)
36{
37 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
38 struct drm_connector *connector = conn_state->connector;
39 struct drm_display_info *info = &connector->display_info;
40 u32 bus_format;
41
42 if (info->num_bus_formats)
43 bus_format = info->bus_formats[0];
44 else
45 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
46
47 switch (bus_format) {
48 case MEDIA_BUS_FMT_RGB666_1X18:
49 s->output_mode = ROCKCHIP_OUT_MODE_P666;
50 break;
51 case MEDIA_BUS_FMT_RGB565_1X16:
52 s->output_mode = ROCKCHIP_OUT_MODE_P565;
53 break;
54 case MEDIA_BUS_FMT_RGB888_1X24:
55 case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
56 default:
57 s->output_mode = ROCKCHIP_OUT_MODE_P888;
58 break;
59 }
60
61 s->output_type = DRM_MODE_CONNECTOR_LVDS;
62
63 return 0;
64}
65
66static const
67struct drm_encoder_helper_funcs rockchip_rgb_encoder_helper_funcs = {
68 .atomic_check = rockchip_rgb_encoder_atomic_check,
69};
70
71struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
72 struct drm_crtc *crtc,
73 struct drm_device *drm_dev)
74{
75 struct rockchip_rgb *rgb;
76 struct drm_encoder *encoder;
77 struct device_node *port, *endpoint;
78 u32 endpoint_id;
79 int ret = 0, child_count = 0;
80 struct drm_panel *panel;
81 struct drm_bridge *bridge;
82
83 rgb = devm_kzalloc(dev, sizeof(*rgb), GFP_KERNEL);
84 if (!rgb)
85 return ERR_PTR(-ENOMEM);
86
87 rgb->dev = dev;
88 rgb->drm_dev = drm_dev;
89
90 port = of_graph_get_port_by_id(dev->of_node, 0);
91 if (!port)
92 return ERR_PTR(-EINVAL);
93
94 for_each_child_of_node(port, endpoint) {
95 if (of_property_read_u32(endpoint, "reg", &endpoint_id))
96 endpoint_id = 0;
97
98 /* if subdriver (> 0) or error case (< 0), ignore entry */
99 if (rockchip_drm_endpoint_is_subdriver(endpoint) != 0)
100 continue;
101
102 child_count++;
103 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, endpoint_id,
104 &panel, &bridge);
105 if (!ret) {
106 of_node_put(endpoint);
107 break;
108 }
109 }
110
111 of_node_put(port);
112
113 /* if the rgb output is not connected to anything, just return */
114 if (!child_count)
115 return NULL;
116
117 if (ret < 0) {
118 if (ret != -EPROBE_DEFER)
119 DRM_DEV_ERROR(dev, "failed to find panel or bridge %d\n", ret);
120 return ERR_PTR(ret);
121 }
122
123 encoder = &rgb->encoder;
124 encoder->possible_crtcs = drm_crtc_mask(crtc);
125
126 ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_NONE);
127 if (ret < 0) {
128 DRM_DEV_ERROR(drm_dev->dev,
129 "failed to initialize encoder: %d\n", ret);
130 return ERR_PTR(ret);
131 }
132
133 drm_encoder_helper_add(encoder, &rockchip_rgb_encoder_helper_funcs);
134
135 if (panel) {
136 bridge = drm_panel_bridge_add_typed(panel,
137 DRM_MODE_CONNECTOR_LVDS);
138 if (IS_ERR(bridge))
139 return ERR_CAST(bridge);
140 }
141
142 rgb->bridge = bridge;
143
144 ret = drm_bridge_attach(encoder, rgb->bridge, NULL, 0);
145 if (ret) {
146 DRM_DEV_ERROR(drm_dev->dev,
147 "failed to attach bridge: %d\n", ret);
148 goto err_free_encoder;
149 }
150
151 return rgb;
152
153err_free_encoder:
154 drm_encoder_cleanup(encoder);
155 return ERR_PTR(ret);
156}
157EXPORT_SYMBOL_GPL(rockchip_rgb_init);
158
159void rockchip_rgb_fini(struct rockchip_rgb *rgb)
160{
161 drm_panel_bridge_remove(rgb->bridge);
162 drm_encoder_cleanup(&rgb->encoder);
163}
164EXPORT_SYMBOL_GPL(rockchip_rgb_fini);