text: /*
   * Copyright (C) 2012 Texas Instruments
   * Author: Rob Clark <robdclark@gmail.com>
   *
   * 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.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   * more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program.  If not, see <http://www.gnu.org/licenses/>.
   */
  
  /* LCDC DRM driver, based on da8xx-fb */
  
  #include <linux/component.h>
  
  #include "tilcdc_drv.h"
  #include "tilcdc_regs.h"
  #include "tilcdc_tfp410.h"
  #include "tilcdc_panel.h"
  #include "tilcdc_external.h"
  
  #include "drm_fb_helper.h"
  
  static LIST_HEAD(module_list);
  
  void tilcdc_module_init(struct tilcdc_module *mod, const char *name,
  		const struct tilcdc_module_ops *funcs)
  {
  	mod->name = name;
  	mod->funcs = funcs;
  	INIT_LIST_HEAD(&mod->list);
  	list_add(&mod->list, &module_list);
  }
  
  void tilcdc_module_cleanup(struct tilcdc_module *mod)
  {
  	list_del(&mod->list);
  }
  
  static struct of_device_id tilcdc_of_match[];
  
  static struct drm_framebuffer *tilcdc_fb_create(struct drm_device *dev,
  		struct drm_file *file_priv, struct drm_mode_fb_cmd2 *mode_cmd)
  {
  	return drm_fb_cma_create(dev, file_priv, mode_cmd);
  }
  
  static void tilcdc_fb_output_poll_changed(struct drm_device *dev)
  {
  	struct tilcdc_drm_private *priv = dev->dev_private;
  	drm_fbdev_cma_hotplug_event(priv->fbdev);
  }
  
  static const struct drm_mode_config_funcs mode_config_funcs = {
  	.fb_create = tilcdc_fb_create,
  	.output_poll_changed = tilcdc_fb_output_poll_changed,
  };
  
  static int modeset_init(struct drm_device *dev)
  {
  	struct tilcdc_drm_private *priv = dev->dev_private;
  	struct tilcdc_module *mod;
  
  	drm_mode_config_init(dev);
  
  	priv->crtc = tilcdc_crtc_create(dev);
  
  	list_for_each_entry(mod, &module_list, list) {
  		DBG("loading module: %s", mod->name);
  		mod->funcs->modeset_init(mod, dev);
  	}
  
  	dev->mode_config.min_width = 0;
  	dev->mode_config.min_height = 0;
  	dev->mode_config.max_width = tilcdc_crtc_max_width(priv->crtc);
  	dev->mode_config.max_height = 2048;
  	dev->mode_config.funcs = &mode_config_funcs;
  
  	return 0;
  }
  
  #ifdef CONFIG_CPU_FREQ
  static int cpufreq_transition(struct notifier_block *nb,
  				     unsigned long val, void *data)
  {
  	struct tilcdc_drm_private *priv = container_of(nb,
  			struct tilcdc_drm_private, freq_transition);
  	if (val == CPUFREQ_POSTCHANGE) {
  		if (priv->lcd_fck_rate != clk_get_rate(priv->clk)) {
  			priv->lcd_fck_rate = clk_get_rate(priv->clk);
  			tilcdc_crtc_update_clk(priv->crtc);
  		}
  	}
  
  	return 0;
  }
  #endif
  
  /*
   * DRM operations:
   */
  
  static int tilcdc_unload(struct drm_device *dev)
  {
  	struct tilcdc_drm_private *priv = dev->dev_private;
  
  	tilcdc_remove_external_encoders(dev);
  
  	drm_fbdev_cma_fini(priv->fbdev);
  	drm_kms_helper_poll_fini(dev);
  	drm_mode_config_cleanup(dev);
  	drm_vblank_cleanup(dev);
  
  	pm_runtime_get_sync(dev->dev);
  	drm_irq_uninstall(dev);
  	pm_runtime_put_sync(dev->dev);
  
  #ifdef CONFIG_CPU_FREQ
  	cpufreq_unregister_notifier(&priv->freq_transition,
  			CPUFREQ_TRANSITION_NOTIFIER);
  #endif
  
  	if (priv->clk)
  		clk_put(priv->clk);
  
  	if (priv->mmio)
  		iounmap(priv->mmio);
  
  	flush_workqueue(priv->wq);
  	destroy_workqueue(priv->wq);
  
  	dev->dev_private = NULL;
  
  	pm_runtime_disable(dev->dev);
  
  	kfree(priv);
  
  	return 0;
  }
  
  static int tilcdc_load(struct drm_device *dev, unsigned long flags)
  {
  	struct platform_device *pdev = dev->platformdev;
  	struct device_node *node = pdev->dev.of_node;
  	struct tilcdc_drm_private *priv;
  	struct tilcdc_module *mod;
  	struct resource *res;
  	u32 bpp = 0;
  	int ret;
  
  	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
  	if (!priv) {
  		dev_err(dev->dev, "failed to allocate private data\n");
  		return -ENOMEM;
  	}
  
  	dev->dev_private = priv;
  
  	priv->is_componentized =
  		tilcdc_get_external_components(dev->dev, NULL) > 0;
  
  	priv->wq = alloc_ordered_workqueue("tilcdc", 0);
  	if (!priv->wq) {
  		ret = -ENOMEM;
  		goto fail_free_priv;
  	}
  
  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  	if (!res) {
  		dev_err(dev->dev, "failed to get memory resource\n");
  		ret = -EINVAL;
  		goto fail_free_wq;
  	}
  
  	priv->mmio = ioremap_nocache(res->start, resource_size(res));
  	if (!priv->mmio) {
  		dev_err(dev->dev, "failed to ioremap\n");
  		ret = -ENOMEM;
  		goto fail_free_wq;
  	}
  
  	priv->clk = clk_get(dev->dev, "fck");
  	if (IS_ERR(priv->clk)) {
  		dev_err(dev->dev, "failed to get functional clock\n");
  		ret = -ENODEV;
  		goto fail_iounmap;
  	}
  
  	priv->disp_clk = clk_get(dev->dev, "dpll_disp_ck");
  	if (IS_ERR(priv->clk)) {
  		dev_err(dev->dev, "failed to get display clock\n");
  		ret = -ENODEV;
  		goto fail_put_clk;
  	}
  
  #ifdef CONFIG_CPU_FREQ
  	priv->lcd_fck_rate = clk_get_rate(priv->clk);
  	priv->freq_transition.notifier_call = cpufreq_transition;
  	ret = cpufreq_register_notifier(&priv->freq_transition,
  			CPUFREQ_TRANSITION_NOTIFIER);
  	if (ret) {
  		dev_err(dev->dev, "failed to register cpufreq notifier\n");
  		goto fail_put_disp_clk;
  	}
  #endif
  
  	if (of_property_read_u32(node, "max-bandwidth", &priv->max_bandwidth))
  		priv->max_bandwidth = TILCDC_DEFAULT_MAX_BANDWIDTH;
  
  	DBG("Maximum Bandwidth Value %d", priv->max_bandwidth);
  
  	if (of_property_read_u32(node, "ti,max-width", &priv->max_width))
  		priv->max_width = TILCDC_DEFAULT_MAX_WIDTH;
  
  	DBG("Maximum Horizontal Pixel Width Value %dpixels", priv->max_width);
  
  	if (of_property_read_u32(node, "ti,max-pixelclock",
  					&priv->max_pixelclock))
  		priv->max_pixelclock = TILCDC_DEFAULT_MAX_PIXELCLOCK;
  
  	DBG("Maximum Pixel Clock Value %dKHz", priv->max_pixelclock);
  
  	pm_runtime_enable(dev->dev);
  	pm_runtime_irq_safe(dev->dev);
  
  	/* Determine LCD IP Version */
  	pm_runtime_get_sync(dev->dev);
  	switch (tilcdc_read(dev, LCDC_PID_REG)) {
  	case 0x4c100102:
  		priv->rev = 1;
  		break;
  	case 0x4f200800:
  	case 0x4f201000:
  		priv->rev = 2;
  		break;
  	default:
  		dev_warn(dev->dev, "Unknown PID Reg value 0x%08x, "
  				"defaulting to LCD revision 1\n",
  				tilcdc_read(dev, LCDC_PID_REG));
  		priv->rev = 1;
  		break;
  	}
  
  	pm_runtime_put_sync(dev->dev);
  
  	ret = modeset_init(dev);
  	if (ret < 0) {
  		dev_err(dev->dev, "failed to initialize mode setting\n");
  		goto fail_cpufreq_unregister;
  	}
  
  	platform_set_drvdata(pdev, dev);
  
  	if (priv->is_componentized) {
  		ret = component_bind_all(dev->dev, dev);
  		if (ret < 0)
  			goto fail_mode_config_cleanup;
  
  		ret = tilcdc_add_external_encoders(dev, &bpp);
  		if (ret < 0)
  			goto fail_component_cleanup;
  	}
  
  	if ((priv->num_encoders == 0) || (priv->num_connectors == 0)) {
  		dev_err(dev->dev, "no encoders/connectors found\n");
  		ret = -ENXIO;
  		goto fail_external_cleanup;
  	}
  
  	ret = drm_vblank_init(dev, 1);
  	if (ret < 0) {
  		dev_err(dev->dev, "failed to initialize vblank\n");
  		goto fail_external_cleanup;
  	}
  
  	pm_runtime_get_sync(dev->dev);
  	ret = drm_irq_install(dev, platform_get_irq(dev->platformdev, 0));
  	pm_runtime_put_sync(dev->dev);
  	if (ret < 0) {
  		dev_err(dev->dev, "failed to install IRQ handler\n");
  		goto fail_vblank_cleanup;
  	}
  
  	list_for_each_entry(mod, &module_list, list) {
  		DBG("%s: preferred_bpp: %d", mod->name, mod->preferred_bpp);
  		bpp = mod->preferred_bpp;
  		if (bpp > 0)
  			break;
  	}
  
  	priv->fbdev = drm_fbdev_cma_init(dev, bpp,
  			dev->mode_config.num_crtc,
  			dev->mode_config.num_connector);
  	if (IS_ERR(priv->fbdev)) {
  		ret = PTR_ERR(priv->fbdev);
  		goto fail_irq_uninstall;
  	}
  
  	drm_kms_helper_poll_init(dev);
  
  	return 0;
  
  fail_irq_uninstall:
  	pm_runtime_get_sync(dev->dev);
  	drm_irq_uninstall(dev);
  	pm_runtime_put_sync(dev->dev);
  
  fail_vblank_cleanup:
  	drm_vblank_cleanup(dev);
  
  fail_mode_config_cleanup:
  	drm_mode_config_cleanup(dev);
  
  fail_component_cleanup:
  	if (priv->is_componentized)
  		component_unbind_all(dev->dev, dev);
  
  fail_external_cleanup:
  	tilcdc_remove_external_encoders(dev);
  
  fail_cpufreq_unregister:
  	pm_runtime_disable(dev->dev);
  #ifdef CONFIG_CPU_FREQ
  	cpufreq_unregister_notifier(&priv->freq_transition,
  			CPUFREQ_TRANSITION_NOTIFIER);
  fail_put_disp_clk:
  	clk_put(priv->disp_clk);
  #endif
  
  fail_put_clk:
  	clk_put(priv->clk);
  
  fail_iounmap:
  	iounmap(priv->mmio);
  
  fail_free_wq:
  	flush_workqueue(priv->wq);
  	destroy_workqueue(priv->wq);
  
  fail_free_priv:
  	dev->dev_private = NULL;
  	kfree(priv);
  	return ret;
  }
  
  static void tilcdc_preclose(struct drm_device *dev, struct drm_file *file)
  {
  	struct tilcdc_drm_private *priv = dev->dev_private;
  
  	tilcdc_crtc_cancel_page_flip(priv->crtc, file);
  }
  
  static void tilcdc_lastclose(struct drm_device *dev)
  {
  	struct tilcdc_drm_private *priv = dev->dev_private;
  	drm_fbdev_cma_restore_mode(priv->fbdev);
  }
  
  static irqreturn_t tilcdc_irq(int irq, void *arg)
  {
  	struct drm_device *dev = arg;
  	struct tilcdc_drm_private *priv = dev->dev_private;
  	return tilcdc_crtc_irq(priv->crtc);
  }
  
  static void tilcdc_irq_preinstall(struct drm_device *dev)
  {
  	tilcdc_clear_irqstatus(dev, 0xffffffff);
  }
  
  static int tilcdc_irq_postinstall(struct drm_device *dev)
  {
  	struct tilcdc_drm_private *priv = dev->dev_private;
  
  	/* enable FIFO underflow irq: */
  	if (priv->rev == 1)
  		tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_V1_UNDERFLOW_INT_ENA);
  	else
  		tilcdc_set(dev, LCDC_INT_ENABLE_SET_REG, LCDC_V2_UNDERFLOW_INT_ENA);
  
  	return 0;
  }
  
  static void tilcdc_irq_uninstall(struct drm_device *dev)
  {
  	struct tilcdc_drm_private *priv = dev->dev_private;
  
  	/* disable irqs that we might have enabled: */
  	if (priv->rev == 1) {
  		tilcdc_clear(dev, LCDC_RASTER_CTRL_REG,
  				LCDC_V1_UNDERFLOW_INT_ENA | LCDC_V1_PL_INT_ENA);
  		tilcdc_clear(dev, LCDC_DMA_CTRL_REG, LCDC_V1_END_OF_FRAME_INT_ENA);
  	} else {
  		tilcdc_clear(dev, LCDC_INT_ENABLE_SET_REG,
  			LCDC_V2_UNDERFLOW_INT_ENA | LCDC_V2_PL_INT_ENA |
  			LCDC_V2_END_OF_FRAME0_INT_ENA | LCDC_V2_END_OF_FRAME1_INT_ENA |
  			LCDC_FRAME_DONE);
  	}
  
  }
  
  static void enable_vblank(struct drm_device *dev, bool enable)
  {
  	struct tilcdc_drm_private *priv = dev->dev_private;
  	u32 reg, mask;
  
  	if (priv->rev == 1) {
  		reg = LCDC_DMA_CTRL_REG;
  		mask = LCDC_V1_END_OF_FRAME_INT_ENA;
  	} else {
  		reg = LCDC_INT_ENABLE_SET_REG;
  		mask = LCDC_V2_END_OF_FRAME0_INT_ENA |
  			LCDC_V2_END_OF_FRAME1_INT_ENA | LCDC_FRAME_DONE;
  	}
  
  	if (enable)
  		tilcdc_set(dev, reg, mask);
  	else
  		tilcdc_clear(dev, reg, mask);
  }
  
  static int tilcdc_enable_vblank(struct drm_device *dev, int crtc)
  {
  	enable_vblank(dev, true);
  	return 0;
  }
  
  static void tilcdc_disable_vblank(struct drm_device *dev, int crtc)
  {
  	enable_vblank(dev, false);
  }
  
  #if defined(CONFIG_DEBUG_FS) || defined(CONFIG_PM_SLEEP)
  static const struct {
  	const char *name;
  	uint8_t  rev;
  	uint8_t  save;
  	uint32_t reg;
  } registers[] =		{
  #define REG(rev, save, reg) { #reg, rev, save, reg }
  		/* exists in revision 1: */
  		REG(1, false, LCDC_PID_REG),
  		REG(1, true,  LCDC_CTRL_REG),
  		REG(1, false, LCDC_STAT_REG),
  		REG(1, true,  LCDC_RASTER_CTRL_REG),
  		REG(1, true,  LCDC_RASTER_TIMING_0_REG),
  		REG(1, true,  LCDC_RASTER_TIMING_1_REG),
  		REG(1, true,  LCDC_RASTER_TIMING_2_REG),
  		REG(1, true,  LCDC_DMA_CTRL_REG),
  		REG(1, true,  LCDC_DMA_FB_BASE_ADDR_0_REG),
  		REG(1, true,  LCDC_DMA_FB_CEILING_ADDR_0_REG),
  		REG(1, true,  LCDC_DMA_FB_BASE_ADDR_1_REG),
  		REG(1, true,  LCDC_DMA_FB_CEILING_ADDR_1_REG),
  		/* new in revision 2: */
  		REG(2, false, LCDC_RAW_STAT_REG),
  		REG(2, false, LCDC_MASKED_STAT_REG),
  		REG(2, false, LCDC_INT_ENABLE_SET_REG),
  		REG(2, false, LCDC_INT_ENABLE_CLR_REG),
  		REG(2, false, LCDC_END_OF_INT_IND_REG),
  		REG(2, true,  LCDC_CLK_ENABLE_REG),
  		REG(2, true,  LCDC_INT_ENABLE_SET_REG),
  #undef REG
  };
  #endif
  
  #ifdef CONFIG_DEBUG_FS
  static int tilcdc_regs_show(struct seq_file *m, void *arg)
  {
  	struct drm_info_node *node = (struct drm_info_node *) m->private;
  	struct drm_device *dev = node->minor->dev;
  	struct tilcdc_drm_private *priv = dev->dev_private;
  	unsigned i;
  
  	pm_runtime_get_sync(dev->dev);
  
  	seq_printf(m, "revision: %d\n", priv->rev);
  
  	for (i = 0; i < ARRAY_SIZE(registers); i++)
  		if (priv->rev >= registers[i].rev)
  			seq_printf(m, "%s:\t %08x\n", registers[i].name,
  					tilcdc_read(dev, registers[i].reg));
  
  	pm_runtime_put_sync(dev->dev);
  
  	return 0;
  }
  
  static int tilcdc_mm_show(struct seq_file *m, void *arg)
  {
  	struct drm_info_node *node = (struct drm_info_node *) m->private;
  	struct drm_device *dev = node->minor->dev;
  	return drm_mm_dump_table(m, &dev->vma_offset_manager->vm_addr_space_mm);
  }
  
  static struct drm_info_list tilcdc_debugfs_list[] = {
  		{ "regs", tilcdc_regs_show, 0 },
  		{ "mm",   tilcdc_mm_show,   0 },
  		{ "fb",   drm_fb_cma_debugfs_show, 0 },
  };
  
  static int tilcdc_debugfs_init(struct drm_minor *minor)
  {
  	struct drm_device *dev = minor->dev;
  	struct tilcdc_module *mod;
  	int ret;
  
  	ret = drm_debugfs_create_files(tilcdc_debugfs_list,
  			ARRAY_SIZE(tilcdc_debugfs_list),
  			minor->debugfs_root, minor);
  
  	list_for_each_entry(mod, &module_list, list)
  		if (mod->funcs->debugfs_init)
  			mod->funcs->debugfs_init(mod, minor);
  
  	if (ret) {
  		dev_err(dev->dev, "could not install tilcdc_debugfs_list\n");
  		return ret;
  	}
  
  	return ret;
  }
  
  static void tilcdc_debugfs_cleanup(struct drm_minor *minor)
  {
  	struct tilcdc_module *mod;
  	drm_debugfs_remove_files(tilcdc_debugfs_list,
  			ARRAY_SIZE(tilcdc_debugfs_list), minor);
  
  	list_for_each_entry(mod, &module_list, list)
  		if (mod->funcs->debugfs_cleanup)
  			mod->funcs->debugfs_cleanup(mod, minor);
  }
  #endif
  
  static const struct file_operations 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 tilcdc_driver = {
  	.driver_features    = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET,
  	.load               = tilcdc_load,
  	.unload             = tilcdc_unload,
  	.preclose           = tilcdc_preclose,
  	.lastclose          = tilcdc_lastclose,
  	.set_busid          = drm_platform_set_busid,
  	.irq_handler        = tilcdc_irq,
  	.irq_preinstall     = tilcdc_irq_preinstall,
  	.irq_postinstall    = tilcdc_irq_postinstall,
  	.irq_uninstall      = tilcdc_irq_uninstall,
  	.get_vblank_counter = drm_vblank_count,
  	.enable_vblank      = tilcdc_enable_vblank,
  	.disable_vblank     = tilcdc_disable_vblank,
  	.gem_free_object    = drm_gem_cma_free_object,
  	.gem_vm_ops         = &drm_gem_cma_vm_ops,
  	.dumb_create        = drm_gem_cma_dumb_create,
  	.dumb_map_offset    = drm_gem_cma_dumb_map_offset,
  	.dumb_destroy       = drm_gem_dumb_destroy,
  #ifdef CONFIG_DEBUG_FS
  	.debugfs_init       = tilcdc_debugfs_init,
  	.debugfs_cleanup    = tilcdc_debugfs_cleanup,
  #endif
  	.fops               = &fops,
  	.name               = "tilcdc",
  	.desc               = "TI LCD Controller DRM",
  	.date               = "20121205",
  	.major              = 1,
  	.minor              = 0,
  };
  
  /*
   * Power management:
   */
  
  #ifdef CONFIG_PM_SLEEP
  static int tilcdc_pm_suspend(struct device *dev)
  {
  	struct drm_device *ddev = dev_get_drvdata(dev);
  	struct tilcdc_drm_private *priv = ddev->dev_private;
  	unsigned i, n = 0;
  
  	drm_kms_helper_poll_disable(ddev);
  
  	/* Save register state: */
  	for (i = 0; i < ARRAY_SIZE(registers); i++)
  		if (registers[i].save && (priv->rev >= registers[i].rev))
  			priv->saved_register[n++] = tilcdc_read(ddev, registers[i].reg);
  
  	return 0;
  }
  
  static int tilcdc_pm_resume(struct device *dev)
  {
  	struct drm_device *ddev = dev_get_drvdata(dev);
  	struct tilcdc_drm_private *priv = ddev->dev_private;
  	unsigned i, n = 0;
  
  	/* Restore register state: */
  	for (i = 0; i < ARRAY_SIZE(registers); i++)
  		if (registers[i].save && (priv->rev >= registers[i].rev))
  			tilcdc_write(ddev, registers[i].reg, priv->saved_register[n++]);
  
  	drm_kms_helper_poll_enable(ddev);
  
  	return 0;
  }
  #endif
  
  static const struct dev_pm_ops tilcdc_pm_ops = {
  	SET_SYSTEM_SLEEP_PM_OPS(tilcdc_pm_suspend, tilcdc_pm_resume)
  };
  
  /*
   * Platform driver:
   */
  
  static int tilcdc_bind(struct device *dev)
  {
  	return drm_platform_init(&tilcdc_driver, to_platform_device(dev));
  }
  
  static void tilcdc_unbind(struct device *dev)
  {
  	drm_put_dev(dev_get_drvdata(dev));
  }
  
  static const struct component_master_ops tilcdc_comp_ops = {
  	.bind = tilcdc_bind,
  	.unbind = tilcdc_unbind,
  };
  
  static int tilcdc_pdev_probe(struct platform_device *pdev)
  {
  	struct component_match *match = NULL;
  	int ret;
  
  	/* bail out early if no DT data: */
  	if (!pdev->dev.of_node) {
  		dev_err(&pdev->dev, "device-tree data is missing\n");
  		return -ENXIO;
  	}
  
  	ret = tilcdc_get_external_components(&pdev->dev, &match);
  	if (ret < 0)
  		return ret;
  	else if (ret == 0)
  		return drm_platform_init(&tilcdc_driver, pdev);
  	else
  		return component_master_add_with_match(&pdev->dev,
  						       &tilcdc_comp_ops,
  						       match);
  }
  
  static int tilcdc_pdev_remove(struct platform_device *pdev)
  {
  	struct drm_device *ddev = dev_get_drvdata(&pdev->dev);
  	struct tilcdc_drm_private *priv = ddev->dev_private;
  
  	/* Check if a subcomponent has already triggered the unloading. */
  	if (!priv)
  		return 0;
  
  	if (priv->is_componentized)
  		component_master_del(&pdev->dev, &tilcdc_comp_ops);
  	else
  		drm_put_dev(platform_get_drvdata(pdev));
  
  	return 0;
  }
  
  static struct of_device_id tilcdc_of_match[] = {
  		{ .compatible = "ti,am33xx-tilcdc", },
  		{ },
  };
  MODULE_DEVICE_TABLE(of, tilcdc_of_match);
  
  static struct platform_driver tilcdc_platform_driver = {
  	.probe      = tilcdc_pdev_probe,
  	.remove     = tilcdc_pdev_remove,
  	.driver     = {
  		.name   = "tilcdc",
  		.pm     = &tilcdc_pm_ops,
  		.of_match_table = tilcdc_of_match,
  	},
  };
  
  static int __init tilcdc_drm_init(void)
  {
  	DBG("init");
  	tilcdc_tfp410_init();
  	tilcdc_panel_init();
  	return platform_driver_register(&tilcdc_platform_driver);
  }
  
  static void __exit tilcdc_drm_fini(void)
  {
  	DBG("fini");
  	platform_driver_unregister(&tilcdc_platform_driver);
  	tilcdc_panel_fini();
  	tilcdc_tfp410_fini();
  }
  
  module_init(tilcdc_drm_init);
  module_exit(tilcdc_drm_fini);
  
  MODULE_AUTHOR("Rob Clark <robdclark@gmail.com");
  MODULE_DESCRIPTION("TI LCD Controller DRM Driver");
  MODULE_LICENSE("GPL");
  