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342 lines
8.2 KiB
342 lines
8.2 KiB
/*
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* Copyright (C) 2012 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/module.h>
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#include <linux/of_graph.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_of.h>
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#include "armada_crtc.h"
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#include "armada_drm.h"
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#include "armada_gem.h"
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#include "armada_hw.h"
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#include <drm/armada_drm.h>
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#include "armada_ioctlP.h"
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static void armada_drm_unref_work(struct work_struct *work)
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{
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struct armada_private *priv =
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container_of(work, struct armada_private, fb_unref_work);
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struct drm_framebuffer *fb;
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while (kfifo_get(&priv->fb_unref, &fb))
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drm_framebuffer_unreference(fb);
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}
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/* Must be called with dev->event_lock held */
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void __armada_drm_queue_unref_work(struct drm_device *dev,
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struct drm_framebuffer *fb)
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{
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struct armada_private *priv = dev->dev_private;
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WARN_ON(!kfifo_put(&priv->fb_unref, fb));
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schedule_work(&priv->fb_unref_work);
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}
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void armada_drm_queue_unref_work(struct drm_device *dev,
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struct drm_framebuffer *fb)
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{
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unsigned long flags;
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spin_lock_irqsave(&dev->event_lock, flags);
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__armada_drm_queue_unref_work(dev, fb);
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spin_unlock_irqrestore(&dev->event_lock, flags);
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}
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static struct drm_ioctl_desc armada_ioctls[] = {
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DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
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DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
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DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
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};
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static void armada_drm_lastclose(struct drm_device *dev)
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{
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armada_fbdev_lastclose(dev);
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}
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DEFINE_DRM_GEM_FOPS(armada_drm_fops);
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static struct drm_driver armada_drm_driver = {
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.lastclose = armada_drm_lastclose,
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.gem_free_object_unlocked = armada_gem_free_object,
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.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
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.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
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.gem_prime_export = armada_gem_prime_export,
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.gem_prime_import = armada_gem_prime_import,
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.dumb_create = armada_gem_dumb_create,
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.dumb_map_offset = armada_gem_dumb_map_offset,
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.dumb_destroy = armada_gem_dumb_destroy,
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.gem_vm_ops = &armada_gem_vm_ops,
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.major = 1,
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.minor = 0,
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.name = "armada-drm",
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.desc = "Armada SoC DRM",
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.date = "20120730",
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.driver_features = DRIVER_GEM | DRIVER_MODESET |
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DRIVER_PRIME,
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.ioctls = armada_ioctls,
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.fops = &armada_drm_fops,
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};
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static int armada_drm_bind(struct device *dev)
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{
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struct armada_private *priv;
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struct resource *mem = NULL;
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int ret, n;
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for (n = 0; ; n++) {
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struct resource *r = platform_get_resource(to_platform_device(dev),
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IORESOURCE_MEM, n);
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if (!r)
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break;
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/* Resources above 64K are graphics memory */
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if (resource_size(r) > SZ_64K)
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mem = r;
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else
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return -EINVAL;
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}
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if (!mem)
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return -ENXIO;
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if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
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"armada-drm"))
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return -EBUSY;
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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/*
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* The drm_device structure must be at the start of
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* armada_private for drm_dev_unref() to work correctly.
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*/
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BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0);
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ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev);
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if (ret) {
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dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n",
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__func__, ret);
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kfree(priv);
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return ret;
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}
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priv->drm.dev_private = priv;
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dev_set_drvdata(dev, &priv->drm);
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INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
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INIT_KFIFO(priv->fb_unref);
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/* Mode setting support */
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drm_mode_config_init(&priv->drm);
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priv->drm.mode_config.min_width = 320;
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priv->drm.mode_config.min_height = 200;
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/*
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* With vscale enabled, the maximum width is 1920 due to the
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* 1920 by 3 lines RAM
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*/
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priv->drm.mode_config.max_width = 1920;
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priv->drm.mode_config.max_height = 2048;
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priv->drm.mode_config.preferred_depth = 24;
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priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
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drm_mm_init(&priv->linear, mem->start, resource_size(mem));
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mutex_init(&priv->linear_lock);
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ret = component_bind_all(dev, &priv->drm);
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if (ret)
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goto err_kms;
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ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
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if (ret)
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goto err_comp;
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priv->drm.irq_enabled = true;
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ret = armada_fbdev_init(&priv->drm);
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if (ret)
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goto err_comp;
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drm_kms_helper_poll_init(&priv->drm);
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ret = drm_dev_register(&priv->drm, 0);
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if (ret)
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goto err_poll;
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#ifdef CONFIG_DEBUG_FS
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armada_drm_debugfs_init(priv->drm.primary);
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#endif
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return 0;
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err_poll:
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drm_kms_helper_poll_fini(&priv->drm);
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armada_fbdev_fini(&priv->drm);
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err_comp:
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component_unbind_all(dev, &priv->drm);
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err_kms:
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drm_mode_config_cleanup(&priv->drm);
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drm_mm_takedown(&priv->linear);
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flush_work(&priv->fb_unref_work);
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drm_dev_unref(&priv->drm);
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return ret;
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}
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static void armada_drm_unbind(struct device *dev)
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{
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struct drm_device *drm = dev_get_drvdata(dev);
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struct armada_private *priv = drm->dev_private;
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drm_kms_helper_poll_fini(&priv->drm);
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armada_fbdev_fini(&priv->drm);
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drm_dev_unregister(&priv->drm);
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component_unbind_all(dev, &priv->drm);
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drm_mode_config_cleanup(&priv->drm);
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drm_mm_takedown(&priv->linear);
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flush_work(&priv->fb_unref_work);
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drm_dev_unref(&priv->drm);
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}
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static int compare_of(struct device *dev, void *data)
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{
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return dev->of_node == data;
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}
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static int compare_dev_name(struct device *dev, void *data)
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{
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const char *name = data;
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return !strcmp(dev_name(dev), name);
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}
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static void armada_add_endpoints(struct device *dev,
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struct component_match **match, struct device_node *port)
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{
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struct device_node *ep, *remote;
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for_each_child_of_node(port, ep) {
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remote = of_graph_get_remote_port_parent(ep);
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if (!remote || !of_device_is_available(remote)) {
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of_node_put(remote);
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continue;
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} else if (!of_device_is_available(remote->parent)) {
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dev_warn(dev, "parent device of %pOF is not available\n",
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remote);
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of_node_put(remote);
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continue;
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}
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drm_of_component_match_add(dev, match, compare_of, remote);
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of_node_put(remote);
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}
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}
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static const struct component_master_ops armada_master_ops = {
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.bind = armada_drm_bind,
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.unbind = armada_drm_unbind,
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};
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static int armada_drm_probe(struct platform_device *pdev)
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{
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struct component_match *match = NULL;
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struct device *dev = &pdev->dev;
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int ret;
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ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
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if (ret != -EINVAL)
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return ret;
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if (dev->platform_data) {
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char **devices = dev->platform_data;
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struct device_node *port;
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struct device *d;
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int i;
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for (i = 0; devices[i]; i++)
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component_match_add(dev, &match, compare_dev_name,
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devices[i]);
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if (i == 0) {
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dev_err(dev, "missing 'ports' property\n");
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return -ENODEV;
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}
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for (i = 0; devices[i]; i++) {
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d = bus_find_device_by_name(&platform_bus_type, NULL,
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devices[i]);
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if (d && d->of_node) {
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for_each_child_of_node(d->of_node, port)
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armada_add_endpoints(dev, &match, port);
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}
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put_device(d);
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}
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}
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return component_master_add_with_match(&pdev->dev, &armada_master_ops,
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match);
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}
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static int armada_drm_remove(struct platform_device *pdev)
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{
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component_master_del(&pdev->dev, &armada_master_ops);
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return 0;
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}
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static const struct platform_device_id armada_drm_platform_ids[] = {
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{
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.name = "armada-drm",
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}, {
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.name = "armada-510-drm",
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},
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{ },
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};
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MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
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static struct platform_driver armada_drm_platform_driver = {
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.probe = armada_drm_probe,
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.remove = armada_drm_remove,
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.driver = {
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.name = "armada-drm",
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},
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.id_table = armada_drm_platform_ids,
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};
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static int __init armada_drm_init(void)
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{
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int ret;
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armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
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ret = platform_driver_register(&armada_lcd_platform_driver);
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if (ret)
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return ret;
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ret = platform_driver_register(&armada_drm_platform_driver);
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if (ret)
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platform_driver_unregister(&armada_lcd_platform_driver);
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return ret;
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}
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module_init(armada_drm_init);
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static void __exit armada_drm_exit(void)
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{
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platform_driver_unregister(&armada_drm_platform_driver);
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platform_driver_unregister(&armada_lcd_platform_driver);
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}
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module_exit(armada_drm_exit);
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MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
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MODULE_DESCRIPTION("Armada DRM Driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:armada-drm");
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