1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2103cd8bcSJyri Sarha /* 3103cd8bcSJyri Sarha * Copyright (C) 2015 Texas Instruments 4103cd8bcSJyri Sarha * Author: Jyri Sarha <jsarha@ti.com> 5103cd8bcSJyri Sarha */ 6103cd8bcSJyri Sarha 7103cd8bcSJyri Sarha #include <linux/component.h> 8103cd8bcSJyri Sarha #include <linux/of_graph.h> 9fcb57664SSam Ravnborg 10fcd70cd3SDaniel Vetter #include <drm/drm_atomic_helper.h> 11ee68c743SBoris Brezillon #include <drm/drm_bridge.h> 1297ac0e47SRussell King #include <drm/drm_of.h> 13103cd8bcSJyri Sarha 14103cd8bcSJyri Sarha #include "tilcdc_drv.h" 15103cd8bcSJyri Sarha #include "tilcdc_external.h" 16103cd8bcSJyri Sarha 17103cd8bcSJyri Sarha static const struct tilcdc_panel_info panel_info_tda998x = { 18103cd8bcSJyri Sarha .ac_bias = 255, 19103cd8bcSJyri Sarha .ac_bias_intrpt = 0, 20103cd8bcSJyri Sarha .dma_burst_sz = 16, 21103cd8bcSJyri Sarha .bpp = 16, 22103cd8bcSJyri Sarha .fdd = 0x80, 23103cd8bcSJyri Sarha .tft_alt_mode = 0, 24103cd8bcSJyri Sarha .invert_pxl_clk = 1, 25103cd8bcSJyri Sarha .sync_edge = 1, 26103cd8bcSJyri Sarha .sync_ctrl = 1, 27103cd8bcSJyri Sarha .raster_order = 0, 28103cd8bcSJyri Sarha }; 29103cd8bcSJyri Sarha 30ec9eab09SJyri Sarha static const struct tilcdc_panel_info panel_info_default = { 31ec9eab09SJyri Sarha .ac_bias = 255, 32ec9eab09SJyri Sarha .ac_bias_intrpt = 0, 33ec9eab09SJyri Sarha .dma_burst_sz = 16, 34ec9eab09SJyri Sarha .bpp = 16, 35ec9eab09SJyri Sarha .fdd = 0x80, 36ec9eab09SJyri Sarha .tft_alt_mode = 0, 37ec9eab09SJyri Sarha .sync_edge = 0, 38ec9eab09SJyri Sarha .sync_ctrl = 1, 39ec9eab09SJyri Sarha .raster_order = 0, 40ec9eab09SJyri Sarha }; 41ec9eab09SJyri Sarha 42ec9eab09SJyri Sarha static 43ec9eab09SJyri Sarha struct drm_connector *tilcdc_encoder_find_connector(struct drm_device *ddev, 44ec9eab09SJyri Sarha struct drm_encoder *encoder) 45103cd8bcSJyri Sarha { 46103cd8bcSJyri Sarha struct drm_connector *connector; 47103cd8bcSJyri Sarha 480b7510d1SVille Syrjälä list_for_each_entry(connector, &ddev->mode_config.connector_list, head) { 490b7510d1SVille Syrjälä if (drm_connector_has_possible_encoder(connector, encoder)) 50ec9eab09SJyri Sarha return connector; 510b7510d1SVille Syrjälä } 52ec9eab09SJyri Sarha 53ec9eab09SJyri Sarha dev_err(ddev->dev, "No connector found for %s encoder (id %d)\n", 54ec9eab09SJyri Sarha encoder->name, encoder->base.id); 55ec9eab09SJyri Sarha 56ec9eab09SJyri Sarha return NULL; 57ec9eab09SJyri Sarha } 58ec9eab09SJyri Sarha 59ec9eab09SJyri Sarha int tilcdc_add_component_encoder(struct drm_device *ddev) 60ec9eab09SJyri Sarha { 61ec9eab09SJyri Sarha struct tilcdc_drm_private *priv = ddev->dev_private; 62ec9eab09SJyri Sarha struct drm_encoder *encoder; 63ec9eab09SJyri Sarha 64ec9eab09SJyri Sarha list_for_each_entry(encoder, &ddev->mode_config.encoder_list, head) 65ec9eab09SJyri Sarha if (encoder->possible_crtcs & (1 << priv->crtc->index)) 66ec9eab09SJyri Sarha break; 67ec9eab09SJyri Sarha 68ec9eab09SJyri Sarha if (!encoder) { 69ec9eab09SJyri Sarha dev_err(ddev->dev, "%s: No suitable encoder found\n", __func__); 70ec9eab09SJyri Sarha return -ENODEV; 71ec9eab09SJyri Sarha } 72ec9eab09SJyri Sarha 7357d83965SJyri Sarha priv->external_connector = 7457d83965SJyri Sarha tilcdc_encoder_find_connector(ddev, encoder); 75ec9eab09SJyri Sarha 7657d83965SJyri Sarha if (!priv->external_connector) 77ec9eab09SJyri Sarha return -ENODEV; 78ec9eab09SJyri Sarha 79ec9eab09SJyri Sarha /* Only tda998x is supported at the moment. */ 80ec9eab09SJyri Sarha tilcdc_crtc_set_simulate_vesa_sync(priv->crtc, true); 81ec9eab09SJyri Sarha tilcdc_crtc_set_panel_info(priv->crtc, &panel_info_tda998x); 82ec9eab09SJyri Sarha 8357d83965SJyri Sarha return 0; 84ec9eab09SJyri Sarha } 85ec9eab09SJyri Sarha 86ec9eab09SJyri Sarha static const struct drm_encoder_funcs tilcdc_external_encoder_funcs = { 87ec9eab09SJyri Sarha .destroy = drm_encoder_cleanup, 88ec9eab09SJyri Sarha }; 89ec9eab09SJyri Sarha 90ec9eab09SJyri Sarha static 91ec9eab09SJyri Sarha int tilcdc_attach_bridge(struct drm_device *ddev, struct drm_bridge *bridge) 92ec9eab09SJyri Sarha { 93ec9eab09SJyri Sarha struct tilcdc_drm_private *priv = ddev->dev_private; 94ec9eab09SJyri Sarha int ret; 95ec9eab09SJyri Sarha 96ec9eab09SJyri Sarha priv->external_encoder->possible_crtcs = BIT(0); 97ec9eab09SJyri Sarha 983bb80f24SLaurent Pinchart ret = drm_bridge_attach(priv->external_encoder, bridge, NULL); 99ec9eab09SJyri Sarha if (ret) { 100ec9eab09SJyri Sarha dev_err(ddev->dev, "drm_bridge_attach() failed %d\n", ret); 101ec9eab09SJyri Sarha return ret; 102ec9eab09SJyri Sarha } 103ec9eab09SJyri Sarha 104ec9eab09SJyri Sarha tilcdc_crtc_set_panel_info(priv->crtc, &panel_info_default); 105ec9eab09SJyri Sarha 10657d83965SJyri Sarha priv->external_connector = 10757d83965SJyri Sarha tilcdc_encoder_find_connector(ddev, priv->external_encoder); 10857d83965SJyri Sarha if (!priv->external_connector) 109ec9eab09SJyri Sarha return -ENODEV; 110ec9eab09SJyri Sarha 11157d83965SJyri Sarha return 0; 112ec9eab09SJyri Sarha } 113ec9eab09SJyri Sarha 114ec9eab09SJyri Sarha int tilcdc_attach_external_device(struct drm_device *ddev) 115ec9eab09SJyri Sarha { 116ec9eab09SJyri Sarha struct tilcdc_drm_private *priv = ddev->dev_private; 117ec9eab09SJyri Sarha struct drm_bridge *bridge; 118544f7377SJyri Sarha struct drm_panel *panel; 119ec9eab09SJyri Sarha int ret; 120ec9eab09SJyri Sarha 121544f7377SJyri Sarha ret = drm_of_find_panel_or_bridge(ddev->dev->of_node, 0, 0, 122544f7377SJyri Sarha &panel, &bridge); 123544f7377SJyri Sarha if (ret == -ENODEV) 124ec9eab09SJyri Sarha return 0; 125544f7377SJyri Sarha else if (ret) 126544f7377SJyri Sarha return ret; 127ec9eab09SJyri Sarha 128ec9eab09SJyri Sarha priv->external_encoder = devm_kzalloc(ddev->dev, 129ec9eab09SJyri Sarha sizeof(*priv->external_encoder), 130ec9eab09SJyri Sarha GFP_KERNEL); 131ec9eab09SJyri Sarha if (!priv->external_encoder) 132ec9eab09SJyri Sarha return -ENOMEM; 133ec9eab09SJyri Sarha 134ec9eab09SJyri Sarha ret = drm_encoder_init(ddev, priv->external_encoder, 135ec9eab09SJyri Sarha &tilcdc_external_encoder_funcs, 136ec9eab09SJyri Sarha DRM_MODE_ENCODER_NONE, NULL); 137ec9eab09SJyri Sarha if (ret) { 138ec9eab09SJyri Sarha dev_err(ddev->dev, "drm_encoder_init() failed %d\n", ret); 139ec9eab09SJyri Sarha return ret; 140ec9eab09SJyri Sarha } 141ec9eab09SJyri Sarha 142544f7377SJyri Sarha if (panel) { 14389958b7cSLaurent Pinchart bridge = devm_drm_panel_bridge_add_typed(ddev->dev, panel, 144544f7377SJyri Sarha DRM_MODE_CONNECTOR_DPI); 145544f7377SJyri Sarha if (IS_ERR(bridge)) { 146544f7377SJyri Sarha ret = PTR_ERR(bridge); 147544f7377SJyri Sarha goto err_encoder_cleanup; 148544f7377SJyri Sarha } 149544f7377SJyri Sarha } 150544f7377SJyri Sarha 151ec9eab09SJyri Sarha ret = tilcdc_attach_bridge(ddev, bridge); 152ec9eab09SJyri Sarha if (ret) 153544f7377SJyri Sarha goto err_encoder_cleanup; 154ec9eab09SJyri Sarha 155544f7377SJyri Sarha return 0; 156544f7377SJyri Sarha 157544f7377SJyri Sarha err_encoder_cleanup: 158544f7377SJyri Sarha drm_encoder_cleanup(priv->external_encoder); 159ec9eab09SJyri Sarha return ret; 160103cd8bcSJyri Sarha } 161103cd8bcSJyri Sarha 162103cd8bcSJyri Sarha static int dev_match_of(struct device *dev, void *data) 163103cd8bcSJyri Sarha { 164103cd8bcSJyri Sarha return dev->of_node == data; 165103cd8bcSJyri Sarha } 166103cd8bcSJyri Sarha 167103cd8bcSJyri Sarha int tilcdc_get_external_components(struct device *dev, 168103cd8bcSJyri Sarha struct component_match **match) 169103cd8bcSJyri Sarha { 17010a55a18SJyri Sarha struct device_node *node; 171103cd8bcSJyri Sarha 17286418f90SRob Herring node = of_graph_get_remote_node(dev->of_node, 0, 0); 17386418f90SRob Herring 17486418f90SRob Herring if (!of_device_is_compatible(node, "nxp,tda998x")) { 17586418f90SRob Herring of_node_put(node); 17610a55a18SJyri Sarha return 0; 177103cd8bcSJyri Sarha } 178103cd8bcSJyri Sarha 179103cd8bcSJyri Sarha if (match) 18086418f90SRob Herring drm_of_component_match_add(dev, match, dev_match_of, node); 181ec9eab09SJyri Sarha of_node_put(node); 18286418f90SRob Herring return 1; 183103cd8bcSJyri Sarha } 184