/* exynos_drm_core.c * * Copyright (c) 2011 Samsung Electronics Co., Ltd. * Author: * Inki Dae * Joonyoung Shim * Seung-Woo Kim * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #include #include "exynos_drm_drv.h" #include "exynos_drm_encoder.h" #include "exynos_drm_connector.h" #include "exynos_drm_fbdev.h" static LIST_HEAD(exynos_drm_subdrv_list); static int exynos_drm_create_enc_conn(struct drm_device *dev, struct exynos_drm_subdrv *subdrv) { struct drm_encoder *encoder; struct drm_connector *connector; int ret; DRM_DEBUG_DRIVER("%s\n", __FILE__); subdrv->manager->dev = subdrv->dev; /* create and initialize a encoder for this sub driver. */ encoder = exynos_drm_encoder_create(dev, subdrv->manager, (1 << MAX_CRTC) - 1); if (!encoder) { DRM_ERROR("failed to create encoder\n"); return -EFAULT; } /* * create and initialize a connector for this sub driver and * attach the encoder created above to the connector. */ connector = exynos_drm_connector_create(dev, encoder); if (!connector) { DRM_ERROR("failed to create connector\n"); ret = -EFAULT; goto err_destroy_encoder; } subdrv->encoder = encoder; subdrv->connector = connector; return 0; err_destroy_encoder: encoder->funcs->destroy(encoder); return ret; } static void exynos_drm_destroy_enc_conn(struct exynos_drm_subdrv *subdrv) { if (subdrv->encoder) { struct drm_encoder *encoder = subdrv->encoder; encoder->funcs->destroy(encoder); subdrv->encoder = NULL; } if (subdrv->connector) { struct drm_connector *connector = subdrv->connector; connector->funcs->destroy(connector); subdrv->connector = NULL; } } static int exynos_drm_subdrv_probe(struct drm_device *dev, struct exynos_drm_subdrv *subdrv) { if (subdrv->probe) { int ret; subdrv->drm_dev = dev; /* * this probe callback would be called by sub driver * after setting of all resources to this sub driver, * such as clock, irq and register map are done or by load() * of exynos drm driver. * * P.S. note that this driver is considered for modularization. */ ret = subdrv->probe(dev, subdrv->dev); if (ret) return ret; } return 0; } static void exynos_drm_subdrv_remove(struct drm_device *dev, struct exynos_drm_subdrv *subdrv) { DRM_DEBUG_DRIVER("%s\n", __FILE__); if (subdrv->remove) subdrv->remove(dev, subdrv->dev); } int exynos_drm_device_register(struct drm_device *dev) { struct exynos_drm_subdrv *subdrv, *n; unsigned int fine_cnt = 0; int err; DRM_DEBUG_DRIVER("%s\n", __FILE__); if (!dev) return -EINVAL; list_for_each_entry_safe(subdrv, n, &exynos_drm_subdrv_list, list) { err = exynos_drm_subdrv_probe(dev, subdrv); if (err) { DRM_DEBUG("exynos drm subdrv probe failed.\n"); list_del(&subdrv->list); continue; } /* * if manager is null then it means that this sub driver * doesn't need encoder and connector. */ if (!subdrv->manager) { fine_cnt++; continue; } err = exynos_drm_create_enc_conn(dev, subdrv); if (err) { DRM_DEBUG("failed to create encoder and connector.\n"); exynos_drm_subdrv_remove(dev, subdrv); list_del(&subdrv->list); continue; } fine_cnt++; } if (!fine_cnt) return -EINVAL; return 0; } EXPORT_SYMBOL_GPL(exynos_drm_device_register); int exynos_drm_device_unregister(struct drm_device *dev) { struct exynos_drm_subdrv *subdrv; DRM_DEBUG_DRIVER("%s\n", __FILE__); if (!dev) { WARN(1, "Unexpected drm device unregister!\n"); return -EINVAL; } list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list) { exynos_drm_subdrv_remove(dev, subdrv); exynos_drm_destroy_enc_conn(subdrv); } return 0; } EXPORT_SYMBOL_GPL(exynos_drm_device_unregister); int exynos_drm_subdrv_register(struct exynos_drm_subdrv *subdrv) { DRM_DEBUG_DRIVER("%s\n", __FILE__); if (!subdrv) return -EINVAL; list_add_tail(&subdrv->list, &exynos_drm_subdrv_list); return 0; } EXPORT_SYMBOL_GPL(exynos_drm_subdrv_register); int exynos_drm_subdrv_unregister(struct exynos_drm_subdrv *subdrv) { DRM_DEBUG_DRIVER("%s\n", __FILE__); if (!subdrv) return -EINVAL; list_del(&subdrv->list); return 0; } EXPORT_SYMBOL_GPL(exynos_drm_subdrv_unregister); int exynos_drm_subdrv_open(struct drm_device *dev, struct drm_file *file) { struct exynos_drm_subdrv *subdrv; int ret; list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list) { if (subdrv->open) { ret = subdrv->open(dev, subdrv->dev, file); if (ret) goto err; } } return 0; err: list_for_each_entry_reverse(subdrv, &subdrv->list, list) { if (subdrv->close) subdrv->close(dev, subdrv->dev, file); } return ret; } EXPORT_SYMBOL_GPL(exynos_drm_subdrv_open); void exynos_drm_subdrv_close(struct drm_device *dev, struct drm_file *file) { struct exynos_drm_subdrv *subdrv; list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list) { if (subdrv->close) subdrv->close(dev, subdrv->dev, file); } } EXPORT_SYMBOL_GPL(exynos_drm_subdrv_close);