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- /*
- * Copyright (C) 2012 Russell King
- *
- * 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 <linux/clk.h>
- #include <linux/component.h>
- #include <linux/module.h>
- #include <linux/of_graph.h>
- #include <drm/drmP.h>
- #include <drm/drm_crtc_helper.h>
- #include <drm/drm_of.h>
- #include "armada_crtc.h"
- #include "armada_drm.h"
- #include "armada_gem.h"
- #include "armada_hw.h"
- #include <drm/armada_drm.h>
- #include "armada_ioctlP.h"
- static void armada_drm_unref_work(struct work_struct *work)
- {
- struct armada_private *priv =
- container_of(work, struct armada_private, fb_unref_work);
- struct drm_framebuffer *fb;
- while (kfifo_get(&priv->fb_unref, &fb))
- drm_framebuffer_unreference(fb);
- }
- /* Must be called with dev->event_lock held */
- void __armada_drm_queue_unref_work(struct drm_device *dev,
- struct drm_framebuffer *fb)
- {
- struct armada_private *priv = dev->dev_private;
- WARN_ON(!kfifo_put(&priv->fb_unref, fb));
- schedule_work(&priv->fb_unref_work);
- }
- void armada_drm_queue_unref_work(struct drm_device *dev,
- struct drm_framebuffer *fb)
- {
- unsigned long flags;
- spin_lock_irqsave(&dev->event_lock, flags);
- __armada_drm_queue_unref_work(dev, fb);
- spin_unlock_irqrestore(&dev->event_lock, flags);
- }
- static int armada_drm_load(struct drm_device *dev, unsigned long flags)
- {
- struct armada_private *priv;
- struct resource *mem = NULL;
- int ret, n;
- for (n = 0; ; n++) {
- struct resource *r = platform_get_resource(dev->platformdev,
- IORESOURCE_MEM, n);
- if (!r)
- break;
- /* Resources above 64K are graphics memory */
- if (resource_size(r) > SZ_64K)
- mem = r;
- else
- return -EINVAL;
- }
- if (!mem)
- return -ENXIO;
- if (!devm_request_mem_region(dev->dev, mem->start,
- resource_size(mem), "armada-drm"))
- return -EBUSY;
- priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
- if (!priv) {
- DRM_ERROR("failed to allocate private\n");
- return -ENOMEM;
- }
- platform_set_drvdata(dev->platformdev, dev);
- dev->dev_private = priv;
- INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
- INIT_KFIFO(priv->fb_unref);
- /* Mode setting support */
- drm_mode_config_init(dev);
- dev->mode_config.min_width = 320;
- dev->mode_config.min_height = 200;
- /*
- * With vscale enabled, the maximum width is 1920 due to the
- * 1920 by 3 lines RAM
- */
- dev->mode_config.max_width = 1920;
- dev->mode_config.max_height = 2048;
- dev->mode_config.preferred_depth = 24;
- dev->mode_config.funcs = &armada_drm_mode_config_funcs;
- drm_mm_init(&priv->linear, mem->start, resource_size(mem));
- ret = component_bind_all(dev->dev, dev);
- if (ret)
- goto err_kms;
- ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
- if (ret)
- goto err_comp;
- dev->irq_enabled = true;
- dev->vblank_disable_allowed = 1;
- ret = armada_fbdev_init(dev);
- if (ret)
- goto err_comp;
- drm_kms_helper_poll_init(dev);
- return 0;
- err_comp:
- component_unbind_all(dev->dev, dev);
- err_kms:
- drm_mode_config_cleanup(dev);
- drm_mm_takedown(&priv->linear);
- flush_work(&priv->fb_unref_work);
- return ret;
- }
- static int armada_drm_unload(struct drm_device *dev)
- {
- struct armada_private *priv = dev->dev_private;
- drm_kms_helper_poll_fini(dev);
- armada_fbdev_fini(dev);
- component_unbind_all(dev->dev, dev);
- drm_mode_config_cleanup(dev);
- drm_mm_takedown(&priv->linear);
- flush_work(&priv->fb_unref_work);
- dev->dev_private = NULL;
- return 0;
- }
- /* These are called under the vbl_lock. */
- static int armada_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
- {
- struct armada_private *priv = dev->dev_private;
- armada_drm_crtc_enable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA);
- return 0;
- }
- static void armada_drm_disable_vblank(struct drm_device *dev, unsigned int pipe)
- {
- struct armada_private *priv = dev->dev_private;
- armada_drm_crtc_disable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA);
- }
- static struct drm_ioctl_desc armada_ioctls[] = {
- DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
- DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
- DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
- };
- static void armada_drm_lastclose(struct drm_device *dev)
- {
- armada_fbdev_lastclose(dev);
- }
- static const struct file_operations armada_drm_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = drm_read,
- .poll = drm_poll,
- .unlocked_ioctl = drm_ioctl,
- .mmap = drm_gem_mmap,
- .open = drm_open,
- .release = drm_release,
- };
- static struct drm_driver armada_drm_driver = {
- .load = armada_drm_load,
- .open = NULL,
- .preclose = NULL,
- .postclose = NULL,
- .lastclose = armada_drm_lastclose,
- .unload = armada_drm_unload,
- .set_busid = drm_platform_set_busid,
- .get_vblank_counter = drm_vblank_no_hw_counter,
- .enable_vblank = armada_drm_enable_vblank,
- .disable_vblank = armada_drm_disable_vblank,
- #ifdef CONFIG_DEBUG_FS
- .debugfs_init = armada_drm_debugfs_init,
- .debugfs_cleanup = armada_drm_debugfs_cleanup,
- #endif
- .gem_free_object = armada_gem_free_object,
- .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
- .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
- .gem_prime_export = armada_gem_prime_export,
- .gem_prime_import = armada_gem_prime_import,
- .dumb_create = armada_gem_dumb_create,
- .dumb_map_offset = armada_gem_dumb_map_offset,
- .dumb_destroy = armada_gem_dumb_destroy,
- .gem_vm_ops = &armada_gem_vm_ops,
- .major = 1,
- .minor = 0,
- .name = "armada-drm",
- .desc = "Armada SoC DRM",
- .date = "20120730",
- .driver_features = DRIVER_GEM | DRIVER_MODESET |
- DRIVER_HAVE_IRQ | DRIVER_PRIME,
- .ioctls = armada_ioctls,
- .fops = &armada_drm_fops,
- };
- static int armada_drm_bind(struct device *dev)
- {
- return drm_platform_init(&armada_drm_driver, to_platform_device(dev));
- }
- static void armada_drm_unbind(struct device *dev)
- {
- drm_put_dev(dev_get_drvdata(dev));
- }
- static int compare_of(struct device *dev, void *data)
- {
- return dev->of_node == data;
- }
- static int compare_dev_name(struct device *dev, void *data)
- {
- const char *name = data;
- return !strcmp(dev_name(dev), name);
- }
- static void armada_add_endpoints(struct device *dev,
- struct component_match **match, struct device_node *port)
- {
- struct device_node *ep, *remote;
- for_each_child_of_node(port, ep) {
- remote = of_graph_get_remote_port_parent(ep);
- if (!remote || !of_device_is_available(remote)) {
- of_node_put(remote);
- continue;
- } else if (!of_device_is_available(remote->parent)) {
- dev_warn(dev, "parent device of %s is not available\n",
- remote->full_name);
- of_node_put(remote);
- continue;
- }
- component_match_add(dev, match, compare_of, remote);
- of_node_put(remote);
- }
- }
- static const struct component_master_ops armada_master_ops = {
- .bind = armada_drm_bind,
- .unbind = armada_drm_unbind,
- };
- static int armada_drm_probe(struct platform_device *pdev)
- {
- struct component_match *match = NULL;
- struct device *dev = &pdev->dev;
- int ret;
- ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
- if (ret != -EINVAL)
- return ret;
- if (dev->platform_data) {
- char **devices = dev->platform_data;
- struct device_node *port;
- struct device *d;
- int i;
- for (i = 0; devices[i]; i++)
- component_match_add(dev, &match, compare_dev_name,
- devices[i]);
- if (i == 0) {
- dev_err(dev, "missing 'ports' property\n");
- return -ENODEV;
- }
- for (i = 0; devices[i]; i++) {
- d = bus_find_device_by_name(&platform_bus_type, NULL,
- devices[i]);
- if (d && d->of_node) {
- for_each_child_of_node(d->of_node, port)
- armada_add_endpoints(dev, &match, port);
- }
- put_device(d);
- }
- }
- return component_master_add_with_match(&pdev->dev, &armada_master_ops,
- match);
- }
- static int armada_drm_remove(struct platform_device *pdev)
- {
- component_master_del(&pdev->dev, &armada_master_ops);
- return 0;
- }
- static const struct platform_device_id armada_drm_platform_ids[] = {
- {
- .name = "armada-drm",
- }, {
- .name = "armada-510-drm",
- },
- { },
- };
- MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
- static struct platform_driver armada_drm_platform_driver = {
- .probe = armada_drm_probe,
- .remove = armada_drm_remove,
- .driver = {
- .name = "armada-drm",
- },
- .id_table = armada_drm_platform_ids,
- };
- static int __init armada_drm_init(void)
- {
- int ret;
- armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
- ret = platform_driver_register(&armada_lcd_platform_driver);
- if (ret)
- return ret;
- ret = platform_driver_register(&armada_drm_platform_driver);
- if (ret)
- platform_driver_unregister(&armada_lcd_platform_driver);
- return ret;
- }
- module_init(armada_drm_init);
- static void __exit armada_drm_exit(void)
- {
- platform_driver_unregister(&armada_drm_platform_driver);
- platform_driver_unregister(&armada_lcd_platform_driver);
- }
- module_exit(armada_drm_exit);
- MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
- MODULE_DESCRIPTION("Armada DRM Driver");
- MODULE_LICENSE("GPL");
- MODULE_ALIAS("platform:armada-drm");
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