/* * Copyright (C) 2014 Traphandler * Copyright (C) 2014 Free Electrons * Copyright (C) 2014 Atmel * * Author: Jean-Jacques Hiblot * Author: Boris BREZILLON * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. * * 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. * * You should have received a copy of the GNU General Public License along with * this program. If not, see . */ #include #include #include #include "atmel_hlcdc_dc.h" /** * Atmel HLCDC RGB connector structure * * This structure stores RGB slave device information. * * @connector: DRM connector * @encoder: DRM encoder * @dc: pointer to the atmel_hlcdc_dc structure * @panel: panel connected on the RGB output */ struct atmel_hlcdc_rgb_output { struct drm_connector connector; struct drm_encoder encoder; struct atmel_hlcdc_dc *dc; struct drm_panel *panel; }; static inline struct atmel_hlcdc_rgb_output * drm_connector_to_atmel_hlcdc_rgb_output(struct drm_connector *connector) { return container_of(connector, struct atmel_hlcdc_rgb_output, connector); } static inline struct atmel_hlcdc_rgb_output * drm_encoder_to_atmel_hlcdc_rgb_output(struct drm_encoder *encoder) { return container_of(encoder, struct atmel_hlcdc_rgb_output, encoder); } static void atmel_hlcdc_rgb_encoder_enable(struct drm_encoder *encoder) { struct atmel_hlcdc_rgb_output *rgb = drm_encoder_to_atmel_hlcdc_rgb_output(encoder); if (rgb->panel) { drm_panel_prepare(rgb->panel); drm_panel_enable(rgb->panel); } } static void atmel_hlcdc_rgb_encoder_disable(struct drm_encoder *encoder) { struct atmel_hlcdc_rgb_output *rgb = drm_encoder_to_atmel_hlcdc_rgb_output(encoder); if (rgb->panel) { drm_panel_disable(rgb->panel); drm_panel_unprepare(rgb->panel); } } static const struct drm_encoder_helper_funcs atmel_hlcdc_panel_encoder_helper_funcs = { .disable = atmel_hlcdc_rgb_encoder_disable, .enable = atmel_hlcdc_rgb_encoder_enable, }; static void atmel_hlcdc_rgb_encoder_destroy(struct drm_encoder *encoder) { drm_encoder_cleanup(encoder); memset(encoder, 0, sizeof(*encoder)); } static const struct drm_encoder_funcs atmel_hlcdc_panel_encoder_funcs = { .destroy = atmel_hlcdc_rgb_encoder_destroy, }; static int atmel_hlcdc_panel_get_modes(struct drm_connector *connector) { struct atmel_hlcdc_rgb_output *rgb = drm_connector_to_atmel_hlcdc_rgb_output(connector); if (rgb->panel) return rgb->panel->funcs->get_modes(rgb->panel); return 0; } static int atmel_hlcdc_rgb_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { struct atmel_hlcdc_rgb_output *rgb = drm_connector_to_atmel_hlcdc_rgb_output(connector); return atmel_hlcdc_dc_mode_valid(rgb->dc, mode); } static struct drm_encoder * atmel_hlcdc_rgb_best_encoder(struct drm_connector *connector) { struct atmel_hlcdc_rgb_output *rgb = drm_connector_to_atmel_hlcdc_rgb_output(connector); return &rgb->encoder; } static const struct drm_connector_helper_funcs atmel_hlcdc_panel_connector_helper_funcs = { .get_modes = atmel_hlcdc_panel_get_modes, .mode_valid = atmel_hlcdc_rgb_mode_valid, .best_encoder = atmel_hlcdc_rgb_best_encoder, }; static enum drm_connector_status atmel_hlcdc_panel_connector_detect(struct drm_connector *connector, bool force) { struct atmel_hlcdc_rgb_output *rgb = drm_connector_to_atmel_hlcdc_rgb_output(connector); if (rgb->panel) return connector_status_connected; return connector_status_disconnected; } static void atmel_hlcdc_panel_connector_destroy(struct drm_connector *connector) { struct atmel_hlcdc_rgb_output *rgb = drm_connector_to_atmel_hlcdc_rgb_output(connector); if (rgb->panel) drm_panel_detach(rgb->panel); drm_connector_cleanup(connector); } static const struct drm_connector_funcs atmel_hlcdc_panel_connector_funcs = { .dpms = drm_atomic_helper_connector_dpms, .detect = atmel_hlcdc_panel_connector_detect, .fill_modes = drm_helper_probe_single_connector_modes, .destroy = atmel_hlcdc_panel_connector_destroy, .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 int atmel_hlcdc_check_endpoint(struct drm_device *dev, const struct of_endpoint *ep) { struct device_node *np; void *obj; np = of_graph_get_remote_port_parent(ep->local_node); obj = of_drm_find_panel(np); if (!obj) obj = of_drm_find_bridge(np); of_node_put(np); return obj ? 0 : -EPROBE_DEFER; } static int atmel_hlcdc_attach_endpoint(struct drm_device *dev, const struct of_endpoint *ep) { struct atmel_hlcdc_dc *dc = dev->dev_private; struct atmel_hlcdc_rgb_output *output; struct device_node *np; struct drm_panel *panel; struct drm_bridge *bridge; int ret; output = devm_kzalloc(dev->dev, sizeof(*output), GFP_KERNEL); if (!output) return -EINVAL; output->dc = dc; drm_encoder_helper_add(&output->encoder, &atmel_hlcdc_panel_encoder_helper_funcs); ret = drm_encoder_init(dev, &output->encoder, &atmel_hlcdc_panel_encoder_funcs, DRM_MODE_ENCODER_NONE, NULL); if (ret) return ret; output->encoder.possible_crtcs = 0x1; np = of_graph_get_remote_port_parent(ep->local_node); ret = -EPROBE_DEFER; panel = of_drm_find_panel(np); if (panel) { of_node_put(np); output->connector.dpms = DRM_MODE_DPMS_OFF; output->connector.polled = DRM_CONNECTOR_POLL_CONNECT; drm_connector_helper_add(&output->connector, &atmel_hlcdc_panel_connector_helper_funcs); ret = drm_connector_init(dev, &output->connector, &atmel_hlcdc_panel_connector_funcs, DRM_MODE_CONNECTOR_Unknown); if (ret) goto err_encoder_cleanup; drm_mode_connector_attach_encoder(&output->connector, &output->encoder); ret = drm_panel_attach(panel, &output->connector); if (ret) { drm_connector_cleanup(&output->connector); goto err_encoder_cleanup; } output->panel = panel; return 0; } bridge = of_drm_find_bridge(np); of_node_put(np); if (bridge) { output->encoder.bridge = bridge; bridge->encoder = &output->encoder; ret = drm_bridge_attach(dev, bridge); if (!ret) return 0; } err_encoder_cleanup: drm_encoder_cleanup(&output->encoder); return ret; } int atmel_hlcdc_create_outputs(struct drm_device *dev) { struct device_node *ep_np = NULL; struct of_endpoint ep; int ret; for_each_endpoint_of_node(dev->dev->of_node, ep_np) { ret = of_graph_parse_endpoint(ep_np, &ep); if (!ret) ret = atmel_hlcdc_check_endpoint(dev, &ep); of_node_put(ep_np); if (ret) return ret; } for_each_endpoint_of_node(dev->dev->of_node, ep_np) { ret = of_graph_parse_endpoint(ep_np, &ep); if (!ret) ret = atmel_hlcdc_attach_endpoint(dev, &ep); of_node_put(ep_np); if (ret) return ret; } return 0; }