1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
5 * Sandy Huang <hjc@rock-chips.com>
8 #include <linux/component.h>
9 #include <linux/of_graph.h>
11 #include <drm/drm_atomic_helper.h>
12 #include <drm/drm_bridge.h>
13 #include <drm/drm_bridge_connector.h>
14 #include <drm/drm_dp_helper.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>
20 #include "rockchip_drm_drv.h"
21 #include "rockchip_drm_vop.h"
22 #include "rockchip_rgb.h"
24 #define encoder_to_rgb(c) container_of(c, struct rockchip_rgb, encoder)
28 struct drm_device *drm_dev;
29 struct drm_bridge *bridge;
30 struct drm_encoder encoder;
31 struct drm_connector connector;
36 rockchip_rgb_encoder_atomic_check(struct drm_encoder *encoder,
37 struct drm_crtc_state *crtc_state,
38 struct drm_connector_state *conn_state)
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;
45 if (info->num_bus_formats)
46 bus_format = info->bus_formats[0];
48 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
51 case MEDIA_BUS_FMT_RGB666_1X18:
52 s->output_mode = ROCKCHIP_OUT_MODE_P666;
54 case MEDIA_BUS_FMT_RGB565_1X16:
55 s->output_mode = ROCKCHIP_OUT_MODE_P565;
57 case MEDIA_BUS_FMT_RGB888_1X24:
58 case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
60 s->output_mode = ROCKCHIP_OUT_MODE_P888;
64 s->output_type = DRM_MODE_CONNECTOR_LVDS;
70 struct drm_encoder_helper_funcs rockchip_rgb_encoder_helper_funcs = {
71 .atomic_check = rockchip_rgb_encoder_atomic_check,
74 struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
75 struct drm_crtc *crtc,
76 struct drm_device *drm_dev)
78 struct rockchip_rgb *rgb;
79 struct drm_encoder *encoder;
80 struct device_node *port, *endpoint;
82 int ret = 0, child_count = 0;
83 struct drm_panel *panel;
84 struct drm_bridge *bridge;
85 struct drm_connector *connector;
87 rgb = devm_kzalloc(dev, sizeof(*rgb), GFP_KERNEL);
89 return ERR_PTR(-ENOMEM);
92 rgb->drm_dev = drm_dev;
94 port = of_graph_get_port_by_id(dev->of_node, 0);
96 return ERR_PTR(-EINVAL);
98 for_each_child_of_node(port, endpoint) {
99 if (of_property_read_u32(endpoint, "reg", &endpoint_id))
102 /* if subdriver (> 0) or error case (< 0), ignore entry */
103 if (rockchip_drm_endpoint_is_subdriver(endpoint) != 0)
107 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, endpoint_id,
110 of_node_put(endpoint);
117 /* if the rgb output is not connected to anything, just return */
122 if (ret != -EPROBE_DEFER)
123 DRM_DEV_ERROR(dev, "failed to find panel or bridge %d\n", ret);
127 encoder = &rgb->encoder;
128 encoder->possible_crtcs = drm_crtc_mask(crtc);
130 ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_NONE);
132 DRM_DEV_ERROR(drm_dev->dev,
133 "failed to initialize encoder: %d\n", ret);
137 drm_encoder_helper_add(encoder, &rockchip_rgb_encoder_helper_funcs);
140 bridge = drm_panel_bridge_add_typed(panel,
141 DRM_MODE_CONNECTOR_LVDS);
143 return ERR_CAST(bridge);
146 rgb->bridge = bridge;
148 ret = drm_bridge_attach(encoder, rgb->bridge, NULL,
149 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
151 goto err_free_encoder;
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",
159 ret = PTR_ERR(connector);
160 goto err_free_encoder;
163 ret = drm_connector_attach_encoder(connector, encoder);
165 DRM_DEV_ERROR(drm_dev->dev,
166 "failed to attach encoder: %d\n", ret);
167 goto err_free_connector;
173 drm_connector_cleanup(connector);
175 drm_encoder_cleanup(encoder);
178 EXPORT_SYMBOL_GPL(rockchip_rgb_init);
180 void rockchip_rgb_fini(struct rockchip_rgb *rgb)
182 drm_panel_bridge_remove(rgb->bridge);
183 drm_connector_cleanup(&rgb->connector);
184 drm_encoder_cleanup(&rgb->encoder);
186 EXPORT_SYMBOL_GPL(rockchip_rgb_fini);