/* * Copyright (C) 2015 Free Electrons * Copyright (C) 2015 NextThing Co * * Maxime Ripard * * 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. */ #include #include #include #include #include #include #include "sun4i_crtc.h" #include "sun4i_drv.h" #include "sun4i_framebuffer.h" #include "sun4i_layer.h" #include "sun4i_tcon.h" static int sun4i_drv_enable_vblank(struct drm_device *drm, unsigned int pipe) { struct sun4i_drv *drv = drm->dev_private; struct sun4i_tcon *tcon = drv->tcon; DRM_DEBUG_DRIVER("Enabling VBLANK on pipe %d\n", pipe); sun4i_tcon_enable_vblank(tcon, true); return 0; } static void sun4i_drv_disable_vblank(struct drm_device *drm, unsigned int pipe) { struct sun4i_drv *drv = drm->dev_private; struct sun4i_tcon *tcon = drv->tcon; DRM_DEBUG_DRIVER("Disabling VBLANK on pipe %d\n", pipe); sun4i_tcon_enable_vblank(tcon, false); } static const struct file_operations sun4i_drv_fops = { .owner = THIS_MODULE, .open = drm_open, .release = drm_release, .unlocked_ioctl = drm_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = drm_compat_ioctl, #endif .poll = drm_poll, .read = drm_read, .llseek = no_llseek, .mmap = drm_gem_cma_mmap, }; static struct drm_driver sun4i_drv_driver = { .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_ATOMIC, /* Generic Operations */ .fops = &sun4i_drv_fops, .name = "sun4i-drm", .desc = "Allwinner sun4i Display Engine", .date = "20150629", .major = 1, .minor = 0, /* GEM Operations */ .dumb_create = drm_gem_cma_dumb_create, .dumb_destroy = drm_gem_dumb_destroy, .dumb_map_offset = drm_gem_cma_dumb_map_offset, .gem_free_object_unlocked = drm_gem_cma_free_object, .gem_vm_ops = &drm_gem_cma_vm_ops, /* PRIME Operations */ .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, /* Frame Buffer Operations */ /* VBlank Operations */ .get_vblank_counter = drm_vblank_count, .enable_vblank = sun4i_drv_enable_vblank, .disable_vblank = sun4i_drv_disable_vblank, }; static void sun4i_remove_framebuffers(void) { struct apertures_struct *ap; ap = alloc_apertures(1); if (!ap) return; /* The framebuffer can be located anywhere in RAM */ ap->ranges[0].base = 0; ap->ranges[0].size = ~0; remove_conflicting_framebuffers(ap, "sun4i-drm-fb", false); kfree(ap); } static int sun4i_drv_bind(struct device *dev) { struct drm_device *drm; struct sun4i_drv *drv; int ret; drm = drm_dev_alloc(&sun4i_drv_driver, dev); if (!drm) return -ENOMEM; drv = devm_kzalloc(dev, sizeof(*drv), GFP_KERNEL); if (!drv) { ret = -ENOMEM; goto free_drm; } drm->dev_private = drv; drm_vblank_init(drm, 1); drm_mode_config_init(drm); ret = component_bind_all(drm->dev, drm); if (ret) { dev_err(drm->dev, "Couldn't bind all pipelines components\n"); goto free_drm; } /* Create our layers */ drv->layers = sun4i_layers_init(drm); if (!drv->layers) { dev_err(drm->dev, "Couldn't create the planes\n"); ret = -EINVAL; goto free_drm; } /* Create our CRTC */ drv->crtc = sun4i_crtc_init(drm); if (!drv->crtc) { dev_err(drm->dev, "Couldn't create the CRTC\n"); ret = -EINVAL; goto free_drm; } drm->irq_enabled = true; /* Remove early framebuffers (ie. simplefb) */ sun4i_remove_framebuffers(); /* Create our framebuffer */ drv->fbdev = sun4i_framebuffer_init(drm); if (IS_ERR(drv->fbdev)) { dev_err(drm->dev, "Couldn't create our framebuffer\n"); ret = PTR_ERR(drv->fbdev); goto free_drm; } /* Enable connectors polling */ drm_kms_helper_poll_init(drm); ret = drm_dev_register(drm, 0); if (ret) goto free_drm; return 0; free_drm: drm_dev_unref(drm); return ret; } static void sun4i_drv_unbind(struct device *dev) { struct drm_device *drm = dev_get_drvdata(dev); drm_connector_unregister_all(drm); drm_dev_unregister(drm); drm_kms_helper_poll_fini(drm); sun4i_framebuffer_free(drm); drm_vblank_cleanup(drm); drm_dev_unref(drm); } static const struct component_master_ops sun4i_drv_master_ops = { .bind = sun4i_drv_bind, .unbind = sun4i_drv_unbind, }; static bool sun4i_drv_node_is_frontend(struct device_node *node) { return of_device_is_compatible(node, "allwinner,sun5i-a13-display-frontend"); } static bool sun4i_drv_node_is_tcon(struct device_node *node) { return of_device_is_compatible(node, "allwinner,sun5i-a13-tcon"); } static int compare_of(struct device *dev, void *data) { DRM_DEBUG_DRIVER("Comparing of node %s with %s\n", of_node_full_name(dev->of_node), of_node_full_name(data)); return dev->of_node == data; } static int sun4i_drv_add_endpoints(struct device *dev, struct component_match **match, struct device_node *node) { struct device_node *port, *ep, *remote; int count = 0; /* * We don't support the frontend for now, so we will never * have a device bound. Just skip over it, but we still want * the rest our pipeline to be added. */ if (!sun4i_drv_node_is_frontend(node) && !of_device_is_available(node)) return 0; if (!sun4i_drv_node_is_frontend(node)) { /* Add current component */ DRM_DEBUG_DRIVER("Adding component %s\n", of_node_full_name(node)); component_match_add(dev, match, compare_of, node); count++; } /* Inputs are listed first, then outputs */ port = of_graph_get_port_by_id(node, 1); if (!port) { DRM_DEBUG_DRIVER("No output to bind\n"); return count; } for_each_available_child_of_node(port, ep) { remote = of_graph_get_remote_port_parent(ep); if (!remote) { DRM_DEBUG_DRIVER("Error retrieving the output node\n"); of_node_put(remote); continue; } /* * If the node is our TCON, the first port is used for our * panel, and will not be part of the * component framework. */ if (sun4i_drv_node_is_tcon(node)) { struct of_endpoint endpoint; if (of_graph_parse_endpoint(ep, &endpoint)) { DRM_DEBUG_DRIVER("Couldn't parse endpoint\n"); continue; } if (!endpoint.id) { DRM_DEBUG_DRIVER("Endpoint is our panel... skipping\n"); continue; } } /* Walk down our tree */ count += sun4i_drv_add_endpoints(dev, match, remote); of_node_put(remote); } return count; } static int sun4i_drv_probe(struct platform_device *pdev) { struct component_match *match = NULL; struct device_node *np = pdev->dev.of_node; int i, count = 0; for (i = 0;; i++) { struct device_node *pipeline = of_parse_phandle(np, "allwinner,pipelines", i); if (!pipeline) break; count += sun4i_drv_add_endpoints(&pdev->dev, &match, pipeline); DRM_DEBUG_DRIVER("Queued %d outputs on pipeline %d\n", count, i); } if (count) return component_master_add_with_match(&pdev->dev, &sun4i_drv_master_ops, match); else return 0; } static int sun4i_drv_remove(struct platform_device *pdev) { return 0; } static const struct of_device_id sun4i_drv_of_table[] = { { .compatible = "allwinner,sun5i-a13-display-engine" }, { } }; MODULE_DEVICE_TABLE(of, sun4i_drv_of_table); static struct platform_driver sun4i_drv_platform_driver = { .probe = sun4i_drv_probe, .remove = sun4i_drv_remove, .driver = { .name = "sun4i-drm", .of_match_table = sun4i_drv_of_table, }, }; module_platform_driver(sun4i_drv_platform_driver); MODULE_AUTHOR("Boris Brezillon "); MODULE_AUTHOR("Maxime Ripard "); MODULE_DESCRIPTION("Allwinner A10 Display Engine DRM/KMS Driver"); MODULE_LICENSE("GPL");