/* * DRM driver for the legacy Freescale adapter card holding * Seiko RA169Z20 43WVFIG LCD panel * * Copyright (C) 2018 NXP * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include #include #include struct seiko_adapter { struct device *dev; struct drm_panel *panel; struct drm_bridge bridge; struct drm_connector connector; u32 bpc; u32 bus_format; }; static enum drm_connector_status seiko_adapter_connector_detect( struct drm_connector *connector, bool force) { return connector_status_connected; } static int seiko_adapter_connector_get_modes(struct drm_connector *connector) { int num_modes; struct seiko_adapter *adap = container_of(connector, struct seiko_adapter, connector); num_modes = drm_panel_get_modes(adap->panel); /* * The panel will populate the connector display_info properties with * fixed numbers, but we need to change them according to our * configuration. */ connector->display_info.bpc = adap->bpc; drm_display_info_set_bus_formats(&connector->display_info, &adap->bus_format, 1); return num_modes; } static const struct drm_connector_funcs seiko_adapter_connector_funcs = { .detect = seiko_adapter_connector_detect, .fill_modes = drm_helper_probe_single_connector_modes, .destroy = drm_connector_cleanup, .reset = drm_atomic_helper_connector_reset, .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; static const struct drm_connector_helper_funcs seiko_adapter_connector_helper_funcs = { .get_modes = seiko_adapter_connector_get_modes, }; static int seiko_adapter_bridge_attach(struct drm_bridge *bridge) { struct seiko_adapter *adap = bridge->driver_private; struct device *dev = adap->dev; struct drm_encoder *encoder = bridge->encoder; struct drm_device *drm; int ret = 0; if (!encoder) { DRM_DEV_ERROR(dev, "Parent encoder object not found\n"); return -ENODEV; } drm = encoder->dev; /* * Create the connector for our panel */ ret = drm_connector_init(drm, &adap->connector, &seiko_adapter_connector_funcs, DRM_MODE_CONNECTOR_DPI); if (ret) { DRM_DEV_ERROR(dev, "Failed to init drm connector: %d\n", ret); return ret; } drm_connector_helper_add(&adap->connector, &seiko_adapter_connector_helper_funcs); adap->connector.dpms = DRM_MODE_DPMS_OFF; drm_mode_connector_attach_encoder(&adap->connector, encoder); ret = drm_panel_attach(adap->panel, &adap->connector); if (ret) { DRM_DEV_ERROR(dev, "Failed to attach panel: %d\n", ret); drm_connector_cleanup(&adap->connector); return ret; } return ret; } static void seiko_adapter_bridge_detach(struct drm_bridge *bridge) { struct seiko_adapter *adap = bridge->driver_private; drm_panel_detach(adap->panel); drm_connector_cleanup(&adap->connector); } static void seiko_adapter_bridge_enable(struct drm_bridge *bridge) { struct seiko_adapter *adap = bridge->driver_private; struct device *dev = adap->dev; if (drm_panel_prepare(adap->panel)) { DRM_DEV_ERROR(dev, "Failed to prepare panel\n"); return; } if (drm_panel_enable(adap->panel)) { DRM_DEV_ERROR(dev, "Failed to enable panel\n"); drm_panel_unprepare(adap->panel); } } static void seiko_adapter_bridge_disable(struct drm_bridge *bridge) { struct seiko_adapter *adap = bridge->driver_private; struct device *dev = adap->dev; if (drm_panel_disable(adap->panel)) { DRM_DEV_ERROR(dev, "failed to disable panel\n"); return; } if (drm_panel_unprepare(adap->panel)) DRM_DEV_ERROR(dev, "failed to unprepare panel\n"); } static const struct drm_bridge_funcs seiko_adapter_bridge_funcs = { .enable = seiko_adapter_bridge_enable, .disable = seiko_adapter_bridge_disable, .attach = seiko_adapter_bridge_attach, .detach = seiko_adapter_bridge_detach, }; static int seiko_adapter_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct seiko_adapter *adap; struct device_node *remote; u32 bus_mode; int ret, port; adap = devm_kzalloc(dev, sizeof(*adap), GFP_KERNEL); if (!adap) return -ENOMEM; of_property_read_u32(dev->of_node, "bus_mode", &bus_mode); if (bus_mode != 18 && bus_mode != 24) { dev_err(dev, "Invalid bus_mode: %d\n", bus_mode); return -EINVAL; } switch (bus_mode) { case 18: adap->bpc = 6; adap->bus_format = MEDIA_BUS_FMT_RGB666_1X18; break; case 24: adap->bpc = 8; adap->bus_format = MEDIA_BUS_FMT_RGB888_1X24; break; } for (port = 0; port < 2; port++) { remote = of_graph_get_remote_node(dev->of_node, port, -1); if (!remote) { pr_info("No remote for port %d\n", port); return -ENODEV; } adap->panel = of_drm_find_panel(remote); if (adap->panel) break; } if (!adap->panel) { dev_err(dev, "No panel found!\n"); return -ENODEV; } adap->dev = dev; adap->bridge.driver_private = adap; adap->bridge.funcs = &seiko_adapter_bridge_funcs; adap->bridge.of_node = dev->of_node; ret = drm_bridge_add(&adap->bridge); if (ret < 0) dev_err(dev, "Failed to add seiko-adapter bridge (%d)\n", ret); dev_info(dev, "Seiko adapter driver probed\n"); return ret; } static int seiko_adapter_remove(struct platform_device *pdev) { return 0; } static const struct of_device_id seiko_adapter_dt_ids[] = { { .compatible = "nxp,seiko-43wvfig" }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, seiko_adapter_dt_ids); static struct platform_driver seiko_adapter_driver = { .probe = seiko_adapter_probe, .remove = seiko_adapter_remove, .driver = { .of_match_table = seiko_adapter_dt_ids, .name = "nxp-seiko-adapter", }, }; module_platform_driver(seiko_adapter_driver); MODULE_AUTHOR("NXP Semiconductor"); MODULE_DESCRIPTION("Seiko 43WVFIG adapter card driver"); MODULE_LICENSE("GPL");