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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd4 * 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 int34rockchip_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 else46 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 const68struct 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);188