1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2020 Rockchip Electronics Co., Ltd. 4 * 5 * Author: Zhang Yubing <yubing.zhang@rock-chips.com> 6 * Author: Andy Yan <andy.yan@rock-chips.com> 7 */ 8 9 #include <linux/component.h> 10 #include <linux/of_device.h> 11 #include <linux/platform_device.h> 12 #include <drm/bridge/dw_dp.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_print.h> 18 #include <drm/drm_probe_helper.h> 19 #include <drm/drm_simple_kms_helper.h> 20 21 #include <linux/media-bus-format.h> 22 #include <linux/videodev2.h> 23 24 #include "rockchip_drm_drv.h" 25 #include "rockchip_drm_vop.h" 26 27 struct rockchip_dw_dp { 28 struct dw_dp *base; 29 struct device *dev; 30 struct rockchip_encoder encoder; 31 }; 32 33 static int dw_dp_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_atomic_state *state = conn_state->state; 39 struct drm_display_info *di = &conn_state->connector->display_info; 40 struct drm_bridge *bridge = drm_bridge_chain_get_first_bridge(encoder); 41 struct drm_bridge_state *bridge_state = drm_atomic_get_new_bridge_state(state, bridge); 42 u32 bus_format = bridge_state->input_bus_cfg.format; 43 44 switch (bus_format) { 45 case MEDIA_BUS_FMT_UYYVYY10_0_5X30: 46 case MEDIA_BUS_FMT_UYYVYY8_0_5X24: 47 s->output_mode = ROCKCHIP_OUT_MODE_YUV420; 48 break; 49 case MEDIA_BUS_FMT_YUYV10_1X20: 50 case MEDIA_BUS_FMT_YUYV8_1X16: 51 s->output_mode = ROCKCHIP_OUT_MODE_S888_DUMMY; 52 break; 53 case MEDIA_BUS_FMT_RGB101010_1X30: 54 case MEDIA_BUS_FMT_RGB888_1X24: 55 case MEDIA_BUS_FMT_RGB666_1X24_CPADHI: 56 case MEDIA_BUS_FMT_YUV10_1X30: 57 case MEDIA_BUS_FMT_YUV8_1X24: 58 default: 59 s->output_mode = ROCKCHIP_OUT_MODE_AAAA; 60 break; 61 } 62 63 s->output_type = DRM_MODE_CONNECTOR_DisplayPort; 64 s->bus_format = bus_format; 65 s->bus_flags = di->bus_flags; 66 s->color_space = V4L2_COLORSPACE_DEFAULT; 67 68 return 0; 69 } 70 71 static const struct drm_encoder_helper_funcs dw_dp_encoder_helper_funcs = { 72 .atomic_check = dw_dp_encoder_atomic_check, 73 }; 74 75 static int dw_dp_rockchip_bind(struct device *dev, struct device *master, void *data) 76 { 77 struct platform_device *pdev = to_platform_device(dev); 78 const struct dw_dp_plat_data *plat_data; 79 struct drm_device *drm_dev = data; 80 struct rockchip_dw_dp *dp; 81 struct drm_encoder *encoder; 82 struct drm_connector *connector; 83 int ret; 84 85 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); 86 if (!dp) 87 return -ENOMEM; 88 89 dp->dev = dev; 90 platform_set_drvdata(pdev, dp); 91 92 plat_data = of_device_get_match_data(dev); 93 if (!plat_data) 94 return -ENODEV; 95 96 encoder = &dp->encoder.encoder; 97 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev, dev->of_node); 98 rockchip_drm_encoder_set_crtc_endpoint_id(&dp->encoder, dev->of_node, 0, 0); 99 100 ret = drmm_encoder_init(drm_dev, encoder, NULL, DRM_MODE_ENCODER_TMDS, NULL); 101 if (ret) 102 return ret; 103 drm_encoder_helper_add(encoder, &dw_dp_encoder_helper_funcs); 104 105 dp->base = dw_dp_bind(dev, encoder, plat_data); 106 if (IS_ERR(dp->base)) { 107 ret = PTR_ERR(dp->base); 108 return ret; 109 } 110 111 connector = drm_bridge_connector_init(drm_dev, encoder); 112 if (IS_ERR(connector)) { 113 ret = PTR_ERR(connector); 114 return dev_err_probe(dev, ret, "Failed to init bridge connector"); 115 } 116 117 drm_connector_attach_encoder(connector, encoder); 118 119 return 0; 120 } 121 122 static const struct component_ops dw_dp_rockchip_component_ops = { 123 .bind = dw_dp_rockchip_bind, 124 }; 125 126 static int dw_dp_probe(struct platform_device *pdev) 127 { 128 struct device *dev = &pdev->dev; 129 130 return component_add(dev, &dw_dp_rockchip_component_ops); 131 } 132 133 static void dw_dp_remove(struct platform_device *pdev) 134 { 135 struct rockchip_dw_dp *dp = platform_get_drvdata(pdev); 136 137 component_del(dp->dev, &dw_dp_rockchip_component_ops); 138 } 139 140 static const struct dw_dp_plat_data rk3588_dp_plat_data = { 141 .max_link_rate = 810000, 142 .pixel_mode = DW_DP_MP_QUAD_PIXEL, 143 }; 144 145 static const struct dw_dp_plat_data rk3576_dp_plat_data = { 146 .max_link_rate = 810000, 147 .pixel_mode = DW_DP_MP_DUAL_PIXEL, 148 }; 149 150 static const struct of_device_id dw_dp_of_match[] = { 151 { 152 .compatible = "rockchip,rk3588-dp", 153 .data = &rk3588_dp_plat_data, 154 }, { 155 .compatible = "rockchip,rk3576-dp", 156 .data = &rk3576_dp_plat_data, 157 }, 158 {} 159 }; 160 MODULE_DEVICE_TABLE(of, dw_dp_of_match); 161 162 struct platform_driver dw_dp_driver = { 163 .probe = dw_dp_probe, 164 .remove = dw_dp_remove, 165 .driver = { 166 .name = "dw-dp", 167 .of_match_table = dw_dp_of_match, 168 }, 169 }; 170