[deliverable/linux.git] / drivers / gpu / drm / rockchip / rockchip_drm_drv.c

/*
 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
 * Author:Mark Yao <mark.yao@rock-chips.com>
 *
 * based on exynos_drm_drv.c
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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.
 */

#include <asm/dma-iommu.h>

#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/component.h>

#include "rockchip_drm_drv.h"
#include "rockchip_drm_fb.h"
#include "rockchip_drm_fbdev.h"
#include "rockchip_drm_gem.h"

#define DRIVER_NAME	"rockchip"
#define DRIVER_DESC	"RockChip Soc DRM"
#define DRIVER_DATE	"20140818"
#define DRIVER_MAJOR	1
#define DRIVER_MINOR	0

static bool is_support_iommu = true;

/*
 * Attach a (component) device to the shared drm dma mapping from master drm
 * device.  This is used by the VOPs to map GEM buffers to a common DMA
 * mapping.
 */
int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
				   struct device *dev)
{
	struct dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping;
	int ret;

	if (!is_support_iommu)
		return 0;

	ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
	if (ret)
		return ret;

	dma_set_max_seg_size(dev, DMA_BIT_MASK(32));

	return arm_iommu_attach_device(dev, mapping);
}

void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
				    struct device *dev)
{
	if (!is_support_iommu)
		return;

	arm_iommu_detach_device(dev);
}

int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
				 const struct rockchip_crtc_funcs *crtc_funcs)
{
	int pipe = drm_crtc_index(crtc);
	struct rockchip_drm_private *priv = crtc->dev->dev_private;

	if (pipe > ROCKCHIP_MAX_CRTC)
		return -EINVAL;

	priv->crtc_funcs[pipe] = crtc_funcs;

	return 0;
}

void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
{
	int pipe = drm_crtc_index(crtc);
	struct rockchip_drm_private *priv = crtc->dev->dev_private;

	if (pipe > ROCKCHIP_MAX_CRTC)
		return;

	priv->crtc_funcs[pipe] = NULL;
}

static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
						int pipe)
{
	struct drm_crtc *crtc;
	int i = 0;

	list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
		if (i++ == pipe)
			return crtc;

	return NULL;
}

static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
					   unsigned int pipe)
{
	struct rockchip_drm_private *priv = dev->dev_private;
	struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);

	if (crtc && priv->crtc_funcs[pipe] &&
	    priv->crtc_funcs[pipe]->enable_vblank)
		return priv->crtc_funcs[pipe]->enable_vblank(crtc);

	return 0;
}

static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
					     unsigned int pipe)
{
	struct rockchip_drm_private *priv = dev->dev_private;
	struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);

	if (crtc && priv->crtc_funcs[pipe] &&
	    priv->crtc_funcs[pipe]->enable_vblank)
		priv->crtc_funcs[pipe]->disable_vblank(crtc);
}

static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
{
	struct rockchip_drm_private *private;
	struct dma_iommu_mapping *mapping = NULL;
	struct device *dev = drm_dev->dev;
	struct drm_connector *connector;
	int ret;

	private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
	if (!private)
		return -ENOMEM;

	mutex_init(&private->commit.lock);
	INIT_WORK(&private->commit.work, rockchip_drm_atomic_work);

	drm_dev->dev_private = private;

	drm_mode_config_init(drm_dev);

	rockchip_drm_mode_config_init(drm_dev);

	dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
				      GFP_KERNEL);
	if (!dev->dma_parms) {
		ret = -ENOMEM;
		goto err_config_cleanup;
	}

	if (is_support_iommu) {
		/* TODO(djkurtz): fetch the mapping start/size from somewhere */
		mapping = arm_iommu_create_mapping(&platform_bus_type,
						   0x00000000,
						   SZ_2G);
		if (IS_ERR(mapping)) {
			ret = PTR_ERR(mapping);
			goto err_config_cleanup;
		}

		ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
		if (ret)
			goto err_release_mapping;

		dma_set_max_seg_size(dev, DMA_BIT_MASK(32));

		ret = arm_iommu_attach_device(dev, mapping);
		if (ret)
			goto err_release_mapping;
	}

	/* Try to bind all sub drivers. */
	ret = component_bind_all(dev, drm_dev);
	if (ret)
		goto err_detach_device;

	/*
	 * All components are now added, we can publish the connector sysfs
	 * entries to userspace.  This will generate hotplug events and so
	 * userspace will expect to be able to access DRM at this point.
	 */
	list_for_each_entry(connector, &drm_dev->mode_config.connector_list,
			head) {
		ret = drm_connector_register(connector);
		if (ret) {
			dev_err(drm_dev->dev,
				"[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
				connector->base.id,
				connector->name, ret);
			goto err_unbind;
		}
	}

	/* init kms poll for handling hpd */
	drm_kms_helper_poll_init(drm_dev);

	/*
	 * enable drm irq mode.
	 * - with irq_enabled = true, we can use the vblank feature.
	 */
	drm_dev->irq_enabled = true;

	ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
	if (ret)
		goto err_kms_helper_poll_fini;

	drm_mode_config_reset(drm_dev);

	ret = rockchip_drm_fbdev_init(drm_dev);
	if (ret)
		goto err_vblank_cleanup;

	if (is_support_iommu)
		arm_iommu_release_mapping(mapping);
	return 0;
err_vblank_cleanup:
	drm_vblank_cleanup(drm_dev);
err_kms_helper_poll_fini:
	drm_kms_helper_poll_fini(drm_dev);
err_unbind:
	component_unbind_all(dev, drm_dev);
err_detach_device:
	if (is_support_iommu)
		arm_iommu_detach_device(dev);
err_release_mapping:
	if (is_support_iommu)
		arm_iommu_release_mapping(mapping);
err_config_cleanup:
	drm_mode_config_cleanup(drm_dev);
	drm_dev->dev_private = NULL;
	return ret;
}

static int rockchip_drm_unload(struct drm_device *drm_dev)
{
	struct device *dev = drm_dev->dev;

	rockchip_drm_fbdev_fini(drm_dev);
	drm_vblank_cleanup(drm_dev);
	drm_kms_helper_poll_fini(drm_dev);
	component_unbind_all(dev, drm_dev);
	if (is_support_iommu)
		arm_iommu_detach_device(dev);
	drm_mode_config_cleanup(drm_dev);
	drm_dev->dev_private = NULL;

	return 0;
}

static void rockchip_drm_crtc_cancel_pending_vblank(struct drm_crtc *crtc,
						    struct drm_file *file_priv)
{
	struct rockchip_drm_private *priv = crtc->dev->dev_private;
	int pipe = drm_crtc_index(crtc);

	if (pipe < ROCKCHIP_MAX_CRTC &&
	    priv->crtc_funcs[pipe] &&
	    priv->crtc_funcs[pipe]->cancel_pending_vblank)
		priv->crtc_funcs[pipe]->cancel_pending_vblank(crtc, file_priv);
}

static void rockchip_drm_preclose(struct drm_device *dev,
				  struct drm_file *file_priv)
{
	struct drm_crtc *crtc;

	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
		rockchip_drm_crtc_cancel_pending_vblank(crtc, file_priv);
}

void rockchip_drm_lastclose(struct drm_device *dev)
{
	struct rockchip_drm_private *priv = dev->dev_private;

	drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
}

static const struct file_operations rockchip_drm_driver_fops = {
	.owner = THIS_MODULE,
	.open = drm_open,
	.mmap = rockchip_gem_mmap,
	.poll = drm_poll,
	.read = drm_read,
	.unlocked_ioctl = drm_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl = drm_compat_ioctl,
#endif
	.release = drm_release,
};

static struct drm_driver rockchip_drm_driver = {
	.driver_features	= DRIVER_MODESET | DRIVER_GEM |
				  DRIVER_PRIME | DRIVER_ATOMIC,
	.load			= rockchip_drm_load,
	.unload			= rockchip_drm_unload,
	.preclose		= rockchip_drm_preclose,
	.lastclose		= rockchip_drm_lastclose,
	.get_vblank_counter	= drm_vblank_no_hw_counter,
	.enable_vblank		= rockchip_drm_crtc_enable_vblank,
	.disable_vblank		= rockchip_drm_crtc_disable_vblank,
	.gem_vm_ops		= &drm_gem_cma_vm_ops,
	.gem_free_object_unlocked = rockchip_gem_free_object,
	.dumb_create		= rockchip_gem_dumb_create,
	.dumb_map_offset	= rockchip_gem_dumb_map_offset,
	.dumb_destroy		= drm_gem_dumb_destroy,
	.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	= rockchip_gem_prime_get_sg_table,
	.gem_prime_vmap		= rockchip_gem_prime_vmap,
	.gem_prime_vunmap	= rockchip_gem_prime_vunmap,
	.gem_prime_mmap		= rockchip_gem_mmap_buf,
	.fops			= &rockchip_drm_driver_fops,
	.name	= DRIVER_NAME,
	.desc	= DRIVER_DESC,
	.date	= DRIVER_DATE,
	.major	= DRIVER_MAJOR,
	.minor	= DRIVER_MINOR,
};

#ifdef CONFIG_PM_SLEEP
static int rockchip_drm_sys_suspend(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct drm_connector *connector;

	if (!drm)
		return 0;

	drm_modeset_lock_all(drm);
	list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
		int old_dpms = connector->dpms;

		if (connector->funcs->dpms)
			connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);

		/* Set the old mode back to the connector for resume */
		connector->dpms = old_dpms;
	}
	drm_modeset_unlock_all(drm);

	return 0;
}

static int rockchip_drm_sys_resume(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct drm_connector *connector;
	enum drm_connector_status status;
	bool changed = false;

	if (!drm)
		return 0;

	drm_modeset_lock_all(drm);
	list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
		int desired_mode = connector->dpms;

		/*
		 * at suspend time, we save dpms to connector->dpms,
		 * restore the old_dpms, and at current time, the connector
		 * dpms status must be DRM_MODE_DPMS_OFF.
		 */
		connector->dpms = DRM_MODE_DPMS_OFF;

		/*
		 * If the connector has been disconnected during suspend,
		 * disconnect it from the encoder and leave it off. We'll notify
		 * userspace at the end.
		 */
		if (desired_mode == DRM_MODE_DPMS_ON) {
			status = connector->funcs->detect(connector, true);
			if (status == connector_status_disconnected) {
				connector->encoder = NULL;
				connector->status = status;
				changed = true;
				continue;
			}
		}
		if (connector->funcs->dpms)
			connector->funcs->dpms(connector, desired_mode);
	}
	drm_modeset_unlock_all(drm);

	drm_helper_resume_force_mode(drm);

	if (changed)
		drm_kms_helper_hotplug_event(drm);

	return 0;
}
#endif

static const struct dev_pm_ops rockchip_drm_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
				rockchip_drm_sys_resume)
};

static int compare_of(struct device *dev, void *data)
{
	struct device_node *np = data;

	return dev->of_node == np;
}

static void rockchip_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 int rockchip_drm_bind(struct device *dev)
{
	struct drm_device *drm;
	int ret;

	drm = drm_dev_alloc(&rockchip_drm_driver, dev);
	if (!drm)
		return -ENOMEM;

	ret = drm_dev_register(drm, 0);
	if (ret)
		goto err_free;

	dev_set_drvdata(dev, drm);

	return 0;

err_free:
	drm_dev_unref(drm);
	return ret;
}

static void rockchip_drm_unbind(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);

	drm_dev_unregister(drm);
	drm_dev_unref(drm);
	dev_set_drvdata(dev, NULL);
}

static const struct component_master_ops rockchip_drm_ops = {
	.bind = rockchip_drm_bind,
	.unbind = rockchip_drm_unbind,
};

static int rockchip_drm_platform_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct component_match *match = NULL;
	struct device_node *np = dev->of_node;
	struct device_node *port;
	int i;

	if (!np)
		return -ENODEV;
	/*
	 * Bind the crtc ports first, so that
	 * drm_of_find_possible_crtcs called from encoder .bind callbacks
	 * works as expected.
	 */
	for (i = 0;; i++) {
		struct device_node *iommu;

		port = of_parse_phandle(np, "ports", i);
		if (!port)
			break;

		if (!of_device_is_available(port->parent)) {
			of_node_put(port);
			continue;
		}

		iommu = of_parse_phandle(port->parent, "iommus", 0);
		if (!iommu || !of_device_is_available(iommu->parent)) {
			dev_dbg(dev, "no iommu attached for %s, using non-iommu buffers\n",
				port->parent->full_name);
			/*
			 * if there is a crtc not support iommu, force set all
			 * crtc use non-iommu buffer.
			 */
			is_support_iommu = false;
		}

		component_match_add(dev, &match, compare_of, port->parent);
		of_node_put(port);
	}

	if (i == 0) {
		dev_err(dev, "missing 'ports' property\n");
		return -ENODEV;
	}

	if (!match) {
		dev_err(dev, "No available vop found for display-subsystem.\n");
		return -ENODEV;
	}
	/*
	 * For each bound crtc, bind the encoders attached to its
	 * remote endpoint.
	 */
	for (i = 0;; i++) {
		port = of_parse_phandle(np, "ports", i);
		if (!port)
			break;

		if (!of_device_is_available(port->parent)) {
			of_node_put(port);
			continue;
		}

		rockchip_add_endpoints(dev, &match, port);
		of_node_put(port);
	}

	return component_master_add_with_match(dev, &rockchip_drm_ops, match);
}

static int rockchip_drm_platform_remove(struct platform_device *pdev)
{
	component_master_del(&pdev->dev, &rockchip_drm_ops);

	return 0;
}

static const struct of_device_id rockchip_drm_dt_ids[] = {
	{ .compatible = "rockchip,display-subsystem", },
	{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);

static struct platform_driver rockchip_drm_platform_driver = {
	.probe = rockchip_drm_platform_probe,
	.remove = rockchip_drm_platform_remove,
	.driver = {
		.name = "rockchip-drm",
		.of_match_table = rockchip_drm_dt_ids,
		.pm = &rockchip_drm_pm_ops,
	},
};

module_platform_driver(rockchip_drm_platform_driver);

MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
2048e328 MY	1	/*
	2	* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
	3	* Author:Mark Yao <mark.yao@rock-chips.com>
	4	*
	5	* based on exynos_drm_drv.c
	6	*
	7	* This software is licensed under the terms of the GNU General Public
	8	* License version 2, as published by the Free Software Foundation, and
	9	* may be copied, distributed, and modified under those terms.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*/
	16
	17	#include <asm/dma-iommu.h>
	18
	19	#include <drm/drmP.h>
	20	#include <drm/drm_crtc_helper.h>
	21	#include <drm/drm_fb_helper.h>
80f67cd8	22	#include <drm/drm_gem_cma_helper.h>
2048e328 MY	23	#include <linux/dma-mapping.h>
2048e328 MY	24	#include <linux/pm_runtime.h>
00fe6148	25	#include <linux/module.h>
2048e328 MY	26	#include <linux/of_graph.h>
	27	#include <linux/component.h>
	28
	29	#include "rockchip_drm_drv.h"
	30	#include "rockchip_drm_fb.h"
	31	#include "rockchip_drm_fbdev.h"
	32	#include "rockchip_drm_gem.h"
	33
	34	#define DRIVER_NAME "rockchip"
	35	#define DRIVER_DESC "RockChip Soc DRM"
	36	#define DRIVER_DATE "20140818"
	37	#define DRIVER_MAJOR 1
	38	#define DRIVER_MINOR 0
	39
2d90d477 MY	40	static bool is_support_iommu = true;
2d90d477 MY	41
2048e328 MY	42	/*
	43	* Attach a (component) device to the shared drm dma mapping from master drm
	44	* device. This is used by the VOPs to map GEM buffers to a common DMA
	45	* mapping.
	46	*/
	47	int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
	48	struct device *dev)
	49	{
	50	struct dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping;
	51	int ret;
	52
2d90d477 MY	53	if (!is_support_iommu)
	54	return 0;
	55
2048e328 MY	56	ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
	57	if (ret)
	58	return ret;
	59
	60	dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
	61
	62	return arm_iommu_attach_device(dev, mapping);
	63	}
2048e328 MY	64
	65	void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
	66	struct device *dev)
	67	{
2d90d477 MY	68	if (!is_support_iommu)
	69	return;
	70
2048e328 MY	71	arm_iommu_detach_device(dev);
2048e328 MY	72	}
2048e328	73
b5f7b755 MY	74	int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
b5f7b755 MY	75	const struct rockchip_crtc_funcs *crtc_funcs)
2048e328	76	{
b5f7b755 MY	77	int pipe = drm_crtc_index(crtc);
b5f7b755 MY	78	struct rockchip_drm_private *priv = crtc->dev->dev_private;
2048e328 MY	79
	80	if (pipe > ROCKCHIP_MAX_CRTC)
	81	return -EINVAL;
	82
	83	priv->crtc_funcs[pipe] = crtc_funcs;
	84
	85	return 0;
	86	}
2048e328	87
b5f7b755	88	void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
2048e328	89	{
b5f7b755 MY	90	int pipe = drm_crtc_index(crtc);
b5f7b755 MY	91	struct rockchip_drm_private *priv = crtc->dev->dev_private;
2048e328 MY	92
	93	if (pipe > ROCKCHIP_MAX_CRTC)
	94	return;
	95
	96	priv->crtc_funcs[pipe] = NULL;
	97	}
2048e328 MY	98
	99	static struct drm_crtc rockchip_crtc_from_pipe(struct drm_device drm,
	100	int pipe)
	101	{
	102	struct drm_crtc *crtc;
	103	int i = 0;
	104
	105	list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
	106	if (i++ == pipe)
	107	return crtc;
	108
	109	return NULL;
	110	}
	111
88e72717 TR	112	static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
88e72717 TR	113	unsigned int pipe)
2048e328 MY	114	{
	115	struct rockchip_drm_private *priv = dev->dev_private;
	116	struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
	117
	118	if (crtc && priv->crtc_funcs[pipe] &&
	119	priv->crtc_funcs[pipe]->enable_vblank)
	120	return priv->crtc_funcs[pipe]->enable_vblank(crtc);
	121
	122	return 0;
	123	}
	124
88e72717 TR	125	static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
88e72717 TR	126	unsigned int pipe)
2048e328 MY	127	{
	128	struct rockchip_drm_private *priv = dev->dev_private;
	129	struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
	130
	131	if (crtc && priv->crtc_funcs[pipe] &&
	132	priv->crtc_funcs[pipe]->enable_vblank)
	133	priv->crtc_funcs[pipe]->disable_vblank(crtc);
	134	}
	135
	136	static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
	137	{
	138	struct rockchip_drm_private *private;
2d90d477	139	struct dma_iommu_mapping *mapping = NULL;
2048e328	140	struct device *dev = drm_dev->dev;
d3007dab	141	struct drm_connector *connector;
2048e328 MY	142	int ret;
	143
	144	private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
	145	if (!private)
	146	return -ENOMEM;
	147
f32fad51 MY	148	mutex_init(&private->commit.lock);
	149	INIT_WORK(&private->commit.work, rockchip_drm_atomic_work);
	150
2048e328 MY	151	drm_dev->dev_private = private;
	152
	153	drm_mode_config_init(drm_dev);
	154
	155	rockchip_drm_mode_config_init(drm_dev);
	156
	157	dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
	158	GFP_KERNEL);
	159	if (!dev->dma_parms) {
	160	ret = -ENOMEM;
	161	goto err_config_cleanup;
	162	}
	163
2d90d477 MY	164	if (is_support_iommu) {
	165	/* TODO(djkurtz): fetch the mapping start/size from somewhere */
	166	mapping = arm_iommu_create_mapping(&platform_bus_type,
	167	0x00000000,
	168	SZ_2G);
	169	if (IS_ERR(mapping)) {
	170	ret = PTR_ERR(mapping);
	171	goto err_config_cleanup;
	172	}
2048e328	173
2d90d477 MY	174	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
	175	if (ret)
	176	goto err_release_mapping;
2048e328	177
2d90d477	178	dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
2048e328	179
2d90d477 MY	180	ret = arm_iommu_attach_device(dev, mapping);
	181	if (ret)
	182	goto err_release_mapping;
	183	}
2048e328 MY	184
	185	/* Try to bind all sub drivers. */
	186	ret = component_bind_all(dev, drm_dev);
	187	if (ret)
	188	goto err_detach_device;
	189
d3007dab DK	190	/*
	191	* All components are now added, we can publish the connector sysfs
	192	* entries to userspace. This will generate hotplug events and so
	193	* userspace will expect to be able to access DRM at this point.
	194	*/
	195	list_for_each_entry(connector, &drm_dev->mode_config.connector_list,
	196	head) {
	197	ret = drm_connector_register(connector);
	198	if (ret) {
	199	dev_err(drm_dev->dev,
	200	"[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
	201	connector->base.id,
	202	connector->name, ret);
	203	goto err_unbind;
	204	}
	205	}
	206
2048e328 MY	207	/* init kms poll for handling hpd */
	208	drm_kms_helper_poll_init(drm_dev);
	209
	210	/*
	211	* enable drm irq mode.
	212	* - with irq_enabled = true, we can use the vblank feature.
	213	*/
	214	drm_dev->irq_enabled = true;
	215
	216	ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
	217	if (ret)
	218	goto err_kms_helper_poll_fini;
	219
63ebb9fa MY	220	drm_mode_config_reset(drm_dev);
63ebb9fa MY	221
2048e328 MY	222	ret = rockchip_drm_fbdev_init(drm_dev);
	223	if (ret)
	224	goto err_vblank_cleanup;
	225
2d90d477 MY	226	if (is_support_iommu)
2d90d477 MY	227	arm_iommu_release_mapping(mapping);
2048e328 MY	228	return 0;
	229	err_vblank_cleanup:
	230	drm_vblank_cleanup(drm_dev);
	231	err_kms_helper_poll_fini:
	232	drm_kms_helper_poll_fini(drm_dev);
d3007dab	233	err_unbind:
2048e328 MY	234	component_unbind_all(dev, drm_dev);
2048e328 MY	235	err_detach_device:
2d90d477 MY	236	if (is_support_iommu)
2d90d477 MY	237	arm_iommu_detach_device(dev);
2048e328	238	err_release_mapping:
2d90d477 MY	239	if (is_support_iommu)
2d90d477 MY	240	arm_iommu_release_mapping(mapping);
2048e328 MY	241	err_config_cleanup:
	242	drm_mode_config_cleanup(drm_dev);
	243	drm_dev->dev_private = NULL;
	244	return ret;
	245	}
	246
	247	static int rockchip_drm_unload(struct drm_device *drm_dev)
	248	{
	249	struct device *dev = drm_dev->dev;
	250
	251	rockchip_drm_fbdev_fini(drm_dev);
	252	drm_vblank_cleanup(drm_dev);
	253	drm_kms_helper_poll_fini(drm_dev);
	254	component_unbind_all(dev, drm_dev);
2d90d477 MY	255	if (is_support_iommu)
2d90d477 MY	256	arm_iommu_detach_device(dev);
2048e328 MY	257	drm_mode_config_cleanup(drm_dev);
	258	drm_dev->dev_private = NULL;
	259
	260	return 0;
	261	}
	262
f135046e JK	263	static void rockchip_drm_crtc_cancel_pending_vblank(struct drm_crtc *crtc,
	264	struct drm_file *file_priv)
	265	{
	266	struct rockchip_drm_private *priv = crtc->dev->dev_private;
	267	int pipe = drm_crtc_index(crtc);
	268
	269	if (pipe < ROCKCHIP_MAX_CRTC &&
	270	priv->crtc_funcs[pipe] &&
	271	priv->crtc_funcs[pipe]->cancel_pending_vblank)
	272	priv->crtc_funcs[pipe]->cancel_pending_vblank(crtc, file_priv);
	273	}
	274
	275	static void rockchip_drm_preclose(struct drm_device *dev,
	276	struct drm_file *file_priv)
	277	{
	278	struct drm_crtc *crtc;
	279
	280	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
	281	rockchip_drm_crtc_cancel_pending_vblank(crtc, file_priv);
	282	}
	283
2048e328 MY	284	void rockchip_drm_lastclose(struct drm_device *dev)
	285	{
	286	struct rockchip_drm_private *priv = dev->dev_private;
	287
	288	drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
	289	}
	290
	291	static const struct file_operations rockchip_drm_driver_fops = {
	292	.owner = THIS_MODULE,
	293	.open = drm_open,
	294	.mmap = rockchip_gem_mmap,
	295	.poll = drm_poll,
	296	.read = drm_read,
	297	.unlocked_ioctl = drm_ioctl,
	298	#ifdef CONFIG_COMPAT
	299	.compat_ioctl = drm_compat_ioctl,
	300	#endif
	301	.release = drm_release,
	302	};
	303
2048e328	304	static struct drm_driver rockchip_drm_driver = {
63ebb9fa MY	305	.driver_features = DRIVER_MODESET \| DRIVER_GEM \|
63ebb9fa MY	306	DRIVER_PRIME \| DRIVER_ATOMIC,
2048e328 MY	307	.load = rockchip_drm_load,
2048e328 MY	308	.unload = rockchip_drm_unload,
f135046e	309	.preclose = rockchip_drm_preclose,
2048e328	310	.lastclose = rockchip_drm_lastclose,
b44f8408	311	.get_vblank_counter = drm_vblank_no_hw_counter,
2048e328 MY	312	.enable_vblank = rockchip_drm_crtc_enable_vblank,
2048e328 MY	313	.disable_vblank = rockchip_drm_crtc_disable_vblank,
80f67cd8	314	.gem_vm_ops = &drm_gem_cma_vm_ops,
c2466ac3	315	.gem_free_object_unlocked = rockchip_gem_free_object,
2048e328 MY	316	.dumb_create = rockchip_gem_dumb_create,
	317	.dumb_map_offset = rockchip_gem_dumb_map_offset,
	318	.dumb_destroy = drm_gem_dumb_destroy,
	319	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	320	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	321	.gem_prime_import = drm_gem_prime_import,
	322	.gem_prime_export = drm_gem_prime_export,
	323	.gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
	324	.gem_prime_vmap = rockchip_gem_prime_vmap,
	325	.gem_prime_vunmap = rockchip_gem_prime_vunmap,
	326	.gem_prime_mmap = rockchip_gem_mmap_buf,
	327	.fops = &rockchip_drm_driver_fops,
	328	.name = DRIVER_NAME,
	329	.desc = DRIVER_DESC,
	330	.date = DRIVER_DATE,
	331	.major = DRIVER_MAJOR,
	332	.minor = DRIVER_MINOR,
	333	};
	334
	335	#ifdef CONFIG_PM_SLEEP
	336	static int rockchip_drm_sys_suspend(struct device *dev)
	337	{
	338	struct drm_device *drm = dev_get_drvdata(dev);
	339	struct drm_connector *connector;
	340
	341	if (!drm)
	342	return 0;
	343
	344	drm_modeset_lock_all(drm);
	345	list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
	346	int old_dpms = connector->dpms;
	347
	348	if (connector->funcs->dpms)
	349	connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
	350
	351	/* Set the old mode back to the connector for resume */
	352	connector->dpms = old_dpms;
	353	}
	354	drm_modeset_unlock_all(drm);
	355
	356	return 0;
	357	}
	358
	359	static int rockchip_drm_sys_resume(struct device *dev)
	360	{
	361	struct drm_device *drm = dev_get_drvdata(dev);
	362	struct drm_connector *connector;
	363	enum drm_connector_status status;
	364	bool changed = false;
	365
	366	if (!drm)
	367	return 0;
	368
	369	drm_modeset_lock_all(drm);
	370	list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
	371	int desired_mode = connector->dpms;
	372
	373	/*
	374	* at suspend time, we save dpms to connector->dpms,
	375	* restore the old_dpms, and at current time, the connector
	376	* dpms status must be DRM_MODE_DPMS_OFF.
	377	*/
	378	connector->dpms = DRM_MODE_DPMS_OFF;
	379
380	/*
381	* If the connector has been disconnected during suspend,
382	* disconnect it from the encoder and leave it off. We'll notify
383	* userspace at the end.
384	*/
385	if (desired_mode == DRM_MODE_DPMS_ON) {
386	status = connector->funcs->detect(connector, true);
387	if (status == connector_status_disconnected) {
388	connector->encoder = NULL;
389	connector->status = status;
390	changed = true;
391	continue;
392	}
393	}
394	if (connector->funcs->dpms)
395	connector->funcs->dpms(connector, desired_mode);
396	}
397	drm_modeset_unlock_all(drm);
398
399	drm_helper_resume_force_mode(drm);
400
401	if (changed)
402	drm_kms_helper_hotplug_event(drm);
403
404	return 0;
405	}
406	#endif
407
408	static const struct dev_pm_ops rockchip_drm_pm_ops = {
409	SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
410	rockchip_drm_sys_resume)
411	};
412
2048e328 MY	413	static int compare_of(struct device dev, void data)
	414	{
	415	struct device_node *np = data;
	416
	417	return dev->of_node == np;
	418	}
	419
5bad7d29 MY	420	static void rockchip_add_endpoints(struct device *dev,
	421	struct component_match **match,
	422	struct device_node *port)
	423	{
	424	struct device_node ep, remote;
	425
	426	for_each_child_of_node(port, ep) {
	427	remote = of_graph_get_remote_port_parent(ep);
	428	if (!remote \|\| !of_device_is_available(remote)) {
	429	of_node_put(remote);
	430	continue;
	431	} else if (!of_device_is_available(remote->parent)) {
	432	dev_warn(dev, "parent device of %s is not available\n",
	433	remote->full_name);
	434	of_node_put(remote);
	435	continue;
	436	}
	437
	438	component_match_add(dev, match, compare_of, remote);
	439	of_node_put(remote);
	440	}
	441	}
	442
2048e328 MY	443	static int rockchip_drm_bind(struct device *dev)
	444	{
	445	struct drm_device *drm;
	446	int ret;
	447
	448	drm = drm_dev_alloc(&rockchip_drm_driver, dev);
	449	if (!drm)
	450	return -ENOMEM;
	451
2048e328 MY	452	ret = drm_dev_register(drm, 0);
	453	if (ret)
	454	goto err_free;
	455
	456	dev_set_drvdata(dev, drm);
	457
	458	return 0;
	459
	460	err_free:
	461	drm_dev_unref(drm);
	462	return ret;
	463	}
	464
	465	static void rockchip_drm_unbind(struct device *dev)
	466	{
	467	struct drm_device *drm = dev_get_drvdata(dev);
	468
	469	drm_dev_unregister(drm);
	470	drm_dev_unref(drm);
	471	dev_set_drvdata(dev, NULL);
	472	}
	473
	474	static const struct component_master_ops rockchip_drm_ops = {
	475	.bind = rockchip_drm_bind,
	476	.unbind = rockchip_drm_unbind,
	477	};
	478
	479	static int rockchip_drm_platform_probe(struct platform_device *pdev)
	480	{
5bad7d29 MY	481	struct device *dev = &pdev->dev;
	482	struct component_match *match = NULL;
	483	struct device_node *np = dev->of_node;
	484	struct device_node *port;
	485	int i;
2048e328	486
5bad7d29	487	if (!np)
2048e328	488	return -ENODEV;
5bad7d29 MY	489	/*
	490	* Bind the crtc ports first, so that
	491	* drm_of_find_possible_crtcs called from encoder .bind callbacks
	492	* works as expected.
	493	*/
	494	for (i = 0;; i++) {
2d90d477 MY	495	struct device_node *iommu;
2d90d477 MY	496
5bad7d29 MY	497	port = of_parse_phandle(np, "ports", i);
	498	if (!port)
	499	break;
	500
	501	if (!of_device_is_available(port->parent)) {
	502	of_node_put(port);
	503	continue;
	504	}
2048e328	505
2d90d477 MY	506	iommu = of_parse_phandle(port->parent, "iommus", 0);
	507	if (!iommu \|\| !of_device_is_available(iommu->parent)) {
	508	dev_dbg(dev, "no iommu attached for %s, using non-iommu buffers\n",
	509	port->parent->full_name);
	510	/*
	511	* if there is a crtc not support iommu, force set all
	512	* crtc use non-iommu buffer.
	513	*/
	514	is_support_iommu = false;
	515	}
	516
5bad7d29 MY	517	component_match_add(dev, &match, compare_of, port->parent);
	518	of_node_put(port);
	519	}
	520
	521	if (i == 0) {
	522	dev_err(dev, "missing 'ports' property\n");
	523	return -ENODEV;
	524	}
	525
	526	if (!match) {
	527	dev_err(dev, "No available vop found for display-subsystem.\n");
	528	return -ENODEV;
	529	}
	530	/*
	531	* For each bound crtc, bind the encoders attached to its
	532	* remote endpoint.
	533	*/
	534	for (i = 0;; i++) {
	535	port = of_parse_phandle(np, "ports", i);
	536	if (!port)
	537	break;
	538
	539	if (!of_device_is_available(port->parent)) {
	540	of_node_put(port);
	541	continue;
	542	}
	543
	544	rockchip_add_endpoints(dev, &match, port);
	545	of_node_put(port);
	546	}
	547
	548	return component_master_add_with_match(dev, &rockchip_drm_ops, match);
2048e328 MY	549	}
	550
	551	static int rockchip_drm_platform_remove(struct platform_device *pdev)
	552	{
	553	component_master_del(&pdev->dev, &rockchip_drm_ops);
	554
	555	return 0;
	556	}
	557
	558	static const struct of_device_id rockchip_drm_dt_ids[] = {
	559	{ .compatible = "rockchip,display-subsystem", },
	560	{ /* sentinel */ },
	561	};
	562	MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
	563
	564	static struct platform_driver rockchip_drm_platform_driver = {
	565	.probe = rockchip_drm_platform_probe,
	566	.remove = rockchip_drm_platform_remove,
	567	.driver = {
2048e328 MY	568	.name = "rockchip-drm",
	569	.of_match_table = rockchip_drm_dt_ids,
	570	.pm = &rockchip_drm_pm_ops,
	571	},
	572	};
	573
	574	module_platform_driver(rockchip_drm_platform_driver);
	575
	576	MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
	577	MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
	578	MODULE_LICENSE("GPL v2");