/* * Copyright (C) 2014-2015 Broadcom * Copyright (C) 2013 Red Hat * * 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. */ #include #include #include #include #include #include #include #include "drm_fb_cma_helper.h" #include "vc4_drv.h" #include "vc4_regs.h" #define DRIVER_NAME "vc4" #define DRIVER_DESC "Broadcom VC4 graphics" #define DRIVER_DATE "20140616" #define DRIVER_MAJOR 0 #define DRIVER_MINOR 0 #define DRIVER_PATCHLEVEL 0 /* Helper function for mapping the regs on a platform device. */ void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index) { struct resource *res; void __iomem *map; res = platform_get_resource(dev, IORESOURCE_MEM, index); map = devm_ioremap_resource(&dev->dev, res); if (IS_ERR(map)) { DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map)); return map; } return map; } static void vc4_drm_preclose(struct drm_device *dev, struct drm_file *file) { struct drm_crtc *crtc; list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) vc4_cancel_page_flip(crtc, file); } static void vc4_lastclose(struct drm_device *dev) { struct vc4_dev *vc4 = to_vc4_dev(dev); if (vc4->fbdev) drm_fbdev_cma_restore_mode(vc4->fbdev); } static const struct file_operations vc4_drm_fops = { .owner = THIS_MODULE, .open = drm_open, .release = drm_release, .unlocked_ioctl = drm_ioctl, .mmap = drm_gem_cma_mmap, .poll = drm_poll, .read = drm_read, #ifdef CONFIG_COMPAT .compat_ioctl = drm_compat_ioctl, #endif .llseek = noop_llseek, }; static const struct drm_ioctl_desc vc4_drm_ioctls[] = { }; static struct drm_driver vc4_drm_driver = { .driver_features = (DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_GEM | DRIVER_PRIME), .lastclose = vc4_lastclose, .preclose = vc4_drm_preclose, .enable_vblank = vc4_enable_vblank, .disable_vblank = vc4_disable_vblank, .get_vblank_counter = drm_vblank_count, #if defined(CONFIG_DEBUG_FS) .debugfs_init = vc4_debugfs_init, .debugfs_cleanup = vc4_debugfs_cleanup, #endif .gem_create_object = vc4_create_object, .gem_free_object = vc4_free_object, .gem_vm_ops = &drm_gem_cma_vm_ops, .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_import = drm_gem_prime_import, .gem_prime_export = drm_gem_prime_export, .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, .gem_prime_vmap = drm_gem_cma_prime_vmap, .gem_prime_vunmap = drm_gem_cma_prime_vunmap, .gem_prime_mmap = drm_gem_cma_prime_mmap, .dumb_create = vc4_dumb_create, .dumb_map_offset = drm_gem_cma_dumb_map_offset, .dumb_destroy = drm_gem_dumb_destroy, .ioctls = vc4_drm_ioctls, .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls), .fops = &vc4_drm_fops, .name = DRIVER_NAME, .desc = DRIVER_DESC, .date = DRIVER_DATE, .major = DRIVER_MAJOR, .minor = DRIVER_MINOR, .patchlevel = DRIVER_PATCHLEVEL, }; static int compare_dev(struct device *dev, void *data) { return dev == data; } static void vc4_match_add_drivers(struct device *dev, struct component_match **match, struct platform_driver *const *drivers, int count) { int i; for (i = 0; i < count; i++) { struct device_driver *drv = &drivers[i]->driver; struct device *p = NULL, *d; while ((d = bus_find_device(&platform_bus_type, p, drv, (void *)platform_bus_type.match))) { put_device(p); component_match_add(dev, match, compare_dev, d); p = d; } put_device(p); } } static int vc4_drm_bind(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct drm_device *drm; struct drm_connector *connector; struct vc4_dev *vc4; int ret = 0; dev->coherent_dma_mask = DMA_BIT_MASK(32); vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL); if (!vc4) return -ENOMEM; drm = drm_dev_alloc(&vc4_drm_driver, dev); if (!drm) return -ENOMEM; platform_set_drvdata(pdev, drm); vc4->dev = drm; drm->dev_private = vc4; drm_dev_set_unique(drm, dev_name(dev)); vc4_bo_cache_init(drm); drm_mode_config_init(drm); if (ret) goto unref; ret = component_bind_all(dev, drm); if (ret) goto unref; ret = drm_dev_register(drm, 0); if (ret < 0) goto unbind_all; /* Connector registration has to occur after DRM device * registration, because it creates sysfs entries based on the * DRM device. */ list_for_each_entry(connector, &drm->mode_config.connector_list, head) { ret = drm_connector_register(connector); if (ret) goto unregister; } vc4_kms_load(drm); return 0; unregister: drm_dev_unregister(drm); unbind_all: component_unbind_all(dev, drm); unref: drm_dev_unref(drm); vc4_bo_cache_destroy(drm); return ret; } static void vc4_drm_unbind(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct drm_device *drm = platform_get_drvdata(pdev); struct vc4_dev *vc4 = to_vc4_dev(drm); if (vc4->fbdev) drm_fbdev_cma_fini(vc4->fbdev); drm_mode_config_cleanup(drm); drm_put_dev(drm); } static const struct component_master_ops vc4_drm_ops = { .bind = vc4_drm_bind, .unbind = vc4_drm_unbind, }; static struct platform_driver *const component_drivers[] = { &vc4_hdmi_driver, &vc4_crtc_driver, &vc4_hvs_driver, }; static int vc4_platform_drm_probe(struct platform_device *pdev) { struct component_match *match = NULL; struct device *dev = &pdev->dev; vc4_match_add_drivers(dev, &match, component_drivers, ARRAY_SIZE(component_drivers)); return component_master_add_with_match(dev, &vc4_drm_ops, match); } static int vc4_platform_drm_remove(struct platform_device *pdev) { component_master_del(&pdev->dev, &vc4_drm_ops); return 0; } static const struct of_device_id vc4_of_match[] = { { .compatible = "brcm,bcm2835-vc4", }, {}, }; MODULE_DEVICE_TABLE(of, vc4_of_match); static struct platform_driver vc4_platform_driver = { .probe = vc4_platform_drm_probe, .remove = vc4_platform_drm_remove, .driver = { .name = "vc4-drm", .owner = THIS_MODULE, .of_match_table = vc4_of_match, }, }; static int __init vc4_drm_register(void) { int i, ret; for (i = 0; i < ARRAY_SIZE(component_drivers); i++) { ret = platform_driver_register(component_drivers[i]); if (ret) { while (--i >= 0) platform_driver_unregister(component_drivers[i]); return ret; } } return platform_driver_register(&vc4_platform_driver); } static void __exit vc4_drm_unregister(void) { int i; for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--) platform_driver_unregister(component_drivers[i]); platform_driver_unregister(&vc4_platform_driver); } module_init(vc4_drm_register); module_exit(vc4_drm_unregister); MODULE_ALIAS("platform:vc4-drm"); MODULE_DESCRIPTION("Broadcom VC4 DRM Driver"); MODULE_AUTHOR("Eric Anholt "); MODULE_LICENSE("GPL v2");