[linux-2.6-block.git] / drivers / gpu / drm / rockchip / rockchip_drm_drv.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
 * Author:Mark Yao <mark.yao@rock-chips.com>
 *
 * based on exynos_drm_drv.c
 */

#include <drm/drmP.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_of.h>
#include <drm/drm_probe_helper.h>
#include <linux/dma-mapping.h>
#include <linux/dma-iommu.h>
#include <linux/pm_runtime.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/of_platform.h>
#include <linux/component.h>
#include <linux/console.h>
#include <linux/iommu.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;
static struct drm_driver rockchip_drm_driver;

/*
 * 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 rockchip_drm_private *private = drm_dev->dev_private;
	int ret;

	if (!is_support_iommu)
		return 0;

	ret = iommu_attach_device(private->domain, dev);
	if (ret) {
		DRM_DEV_ERROR(dev, "Failed to attach iommu device\n");
		return ret;
	}

	return 0;
}

void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
				    struct device *dev)
{
	struct rockchip_drm_private *private = drm_dev->dev_private;
	struct iommu_domain *domain = private->domain;

	if (!is_support_iommu)
		return;

	iommu_detach_device(domain, dev);
}

static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
{
	struct rockchip_drm_private *private = drm_dev->dev_private;
	struct iommu_domain_geometry *geometry;
	u64 start, end;

	if (!is_support_iommu)
		return 0;

	private->domain = iommu_domain_alloc(&platform_bus_type);
	if (!private->domain)
		return -ENOMEM;

	geometry = &private->domain->geometry;
	start = geometry->aperture_start;
	end = geometry->aperture_end;

	DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
		  start, end);
	drm_mm_init(&private->mm, start, end - start + 1);
	mutex_init(&private->mm_lock);

	return 0;
}

static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
{
	struct rockchip_drm_private *private = drm_dev->dev_private;

	if (!is_support_iommu)
		return;

	drm_mm_takedown(&private->mm);
	iommu_domain_free(private->domain);
}

static int rockchip_drm_bind(struct device *dev)
{
	struct drm_device *drm_dev;
	struct rockchip_drm_private *private;
	int ret;

	drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
	if (IS_ERR(drm_dev))
		return PTR_ERR(drm_dev);

	dev_set_drvdata(dev, drm_dev);

	private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
	if (!private) {
		ret = -ENOMEM;
		goto err_free;
	}

	drm_dev->dev_private = private;

	INIT_LIST_HEAD(&private->psr_list);
	mutex_init(&private->psr_list_lock);

	ret = rockchip_drm_init_iommu(drm_dev);
	if (ret)
		goto err_free;

	drm_mode_config_init(drm_dev);

	rockchip_drm_mode_config_init(drm_dev);

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

	ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);
	if (ret)
		goto err_unbind_all;

	drm_mode_config_reset(drm_dev);

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

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

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

	ret = drm_dev_register(drm_dev, 0);
	if (ret)
		goto err_kms_helper_poll_fini;

	return 0;
err_kms_helper_poll_fini:
	drm_kms_helper_poll_fini(drm_dev);
	rockchip_drm_fbdev_fini(drm_dev);
err_unbind_all:
	component_unbind_all(dev, drm_dev);
err_mode_config_cleanup:
	drm_mode_config_cleanup(drm_dev);
	rockchip_iommu_cleanup(drm_dev);
err_free:
	drm_dev->dev_private = NULL;
	dev_set_drvdata(dev, NULL);
	drm_dev_put(drm_dev);
	return ret;
}

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

	drm_dev_unregister(drm_dev);

	rockchip_drm_fbdev_fini(drm_dev);
	drm_kms_helper_poll_fini(drm_dev);

	drm_atomic_helper_shutdown(drm_dev);
	component_unbind_all(dev, drm_dev);
	drm_mode_config_cleanup(drm_dev);
	rockchip_iommu_cleanup(drm_dev);

	drm_dev->dev_private = NULL;
	dev_set_drvdata(dev, NULL);
	drm_dev_put(drm_dev);
}

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,
	.compat_ioctl = drm_compat_ioctl,
	.release = drm_release,
};

static struct drm_driver rockchip_drm_driver = {
	.driver_features	= DRIVER_MODESET | DRIVER_GEM |
				  DRIVER_PRIME | DRIVER_ATOMIC,
	.lastclose		= drm_fb_helper_lastclose,
	.gem_vm_ops		= &drm_gem_cma_vm_ops,
	.gem_free_object_unlocked = rockchip_gem_free_object,
	.dumb_create		= rockchip_gem_dumb_create,
	.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_import_sg_table	= rockchip_gem_prime_import_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);

	return drm_mode_config_helper_suspend(drm);
}

static int rockchip_drm_sys_resume(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);

	return drm_mode_config_helper_resume(drm);
}
#endif

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

#define MAX_ROCKCHIP_SUB_DRIVERS 16
static struct platform_driver *rockchip_sub_drivers[MAX_ROCKCHIP_SUB_DRIVERS];
static int num_rockchip_sub_drivers;

/*
 * Check if a vop endpoint is leading to a rockchip subdriver or bridge.
 * Should be called from the component bind stage of the drivers
 * to ensure that all subdrivers are probed.
 *
 * @ep: endpoint of a rockchip vop
 *
 * returns true if subdriver, false if external bridge and -ENODEV
 * if remote port does not contain a device.
 */
int rockchip_drm_endpoint_is_subdriver(struct device_node *ep)
{
	struct device_node *node = of_graph_get_remote_port_parent(ep);
	struct platform_device *pdev;
	struct device_driver *drv;
	int i;

	if (!node)
		return -ENODEV;

	/* status disabled will prevent creation of platform-devices */
	pdev = of_find_device_by_node(node);
	of_node_put(node);
	if (!pdev)
		return -ENODEV;

	/*
	 * All rockchip subdrivers have probed at this point, so
	 * any device not having a driver now is an external bridge.
	 */
	drv = pdev->dev.driver;
	if (!drv) {
		platform_device_put(pdev);
		return false;
	}

	for (i = 0; i < num_rockchip_sub_drivers; i++) {
		if (rockchip_sub_drivers[i] == to_platform_driver(drv)) {
			platform_device_put(pdev);
			return true;
		}
	}

	platform_device_put(pdev);
	return false;
}

static int compare_dev(struct device *dev, void *data)
{
	return dev == (struct device *)data;
}

static void rockchip_drm_match_remove(struct device *dev)
{
	struct device_link *link;

	list_for_each_entry(link, &dev->links.consumers, s_node)
		device_link_del(link);
}

static struct component_match *rockchip_drm_match_add(struct device *dev)
{
	struct component_match *match = NULL;
	int i;

	for (i = 0; i < num_rockchip_sub_drivers; i++) {
		struct platform_driver *drv = rockchip_sub_drivers[i];
		struct device *p = NULL, *d;

		do {
			d = bus_find_device(&platform_bus_type, p, &drv->driver,
					    (void *)platform_bus_type.match);
			put_device(p);
			p = d;

			if (!d)
				break;

			device_link_add(dev, d, DL_FLAG_STATELESS);
			component_match_add(dev, &match, compare_dev, d);
		} while (true);
	}

	if (IS_ERR(match))
		rockchip_drm_match_remove(dev);

	return match ?: ERR_PTR(-ENODEV);
}

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

static int rockchip_drm_platform_of_probe(struct device *dev)
{
	struct device_node *np = dev->of_node;
	struct device_node *port;
	bool found = false;
	int i;

	if (!np)
		return -ENODEV;

	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)) {
			DRM_DEV_DEBUG(dev,
				      "no iommu attached for %pOF, using non-iommu buffers\n",
				      port->parent);
			/*
			 * if there is a crtc not support iommu, force set all
			 * crtc use non-iommu buffer.
			 */
			is_support_iommu = false;
		}

		found = true;

		of_node_put(iommu);
		of_node_put(port);
	}

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

	if (!found) {
		DRM_DEV_ERROR(dev,
			      "No available vop found for display-subsystem.\n");
		return -ENODEV;
	}

	return 0;
}

static int rockchip_drm_platform_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct component_match *match = NULL;
	int ret;

	ret = rockchip_drm_platform_of_probe(dev);
	if (ret)
		return ret;

	match = rockchip_drm_match_add(dev);
	if (IS_ERR(match))
		return PTR_ERR(match);

	ret = component_master_add_with_match(dev, &rockchip_drm_ops, match);
	if (ret < 0) {
		rockchip_drm_match_remove(dev);
		return ret;
	}

	return 0;
}

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

	rockchip_drm_match_remove(&pdev->dev);

	return 0;
}

static void rockchip_drm_platform_shutdown(struct platform_device *pdev)
{
	struct drm_device *drm = platform_get_drvdata(pdev);

	if (drm)
		drm_atomic_helper_shutdown(drm);
}

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,
	.shutdown = rockchip_drm_platform_shutdown,
	.driver = {
		.name = "rockchip-drm",
		.of_match_table = rockchip_drm_dt_ids,
		.pm = &rockchip_drm_pm_ops,
	},
};

#define ADD_ROCKCHIP_SUB_DRIVER(drv, cond) { \
	if (IS_ENABLED(cond) && \
	    !WARN_ON(num_rockchip_sub_drivers >= MAX_ROCKCHIP_SUB_DRIVERS)) \
		rockchip_sub_drivers[num_rockchip_sub_drivers++] = &drv; \
}

static int __init rockchip_drm_init(void)
{
	int ret;

	num_rockchip_sub_drivers = 0;
	ADD_ROCKCHIP_SUB_DRIVER(vop_platform_driver, CONFIG_DRM_ROCKCHIP);
	ADD_ROCKCHIP_SUB_DRIVER(rockchip_lvds_driver,
				CONFIG_ROCKCHIP_LVDS);
	ADD_ROCKCHIP_SUB_DRIVER(rockchip_dp_driver,
				CONFIG_ROCKCHIP_ANALOGIX_DP);
	ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
	ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver,
				CONFIG_ROCKCHIP_DW_HDMI);
	ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_rockchip_driver,
				CONFIG_ROCKCHIP_DW_MIPI_DSI);
	ADD_ROCKCHIP_SUB_DRIVER(inno_hdmi_driver, CONFIG_ROCKCHIP_INNO_HDMI);
	ADD_ROCKCHIP_SUB_DRIVER(rk3066_hdmi_driver,
				CONFIG_ROCKCHIP_RK3066_HDMI);

	ret = platform_register_drivers(rockchip_sub_drivers,
					num_rockchip_sub_drivers);
	if (ret)
		return ret;

	ret = platform_driver_register(&rockchip_drm_platform_driver);
	if (ret)
		goto err_unreg_drivers;

	return 0;

err_unreg_drivers:
	platform_unregister_drivers(rockchip_sub_drivers,
				    num_rockchip_sub_drivers);
	return ret;
}

static void __exit rockchip_drm_fini(void)
{
	platform_driver_unregister(&rockchip_drm_platform_driver);

	platform_unregister_drivers(rockchip_sub_drivers,
				    num_rockchip_sub_drivers);
}

module_init(rockchip_drm_init);
module_exit(rockchip_drm_fini);

MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
9c92ab61	1	// SPDX-License-Identifier: GPL-2.0-only
2048e328 MY	2	/*
	3	* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
	4	* Author:Mark Yao <mark.yao@rock-chips.com>
	5	*
	6	* based on exynos_drm_drv.c
2048e328 MY	7	*/
2048e328 MY	8
2048e328	9	#include <drm/drmP.h>
2048e328	10	#include <drm/drm_fb_helper.h>
80f67cd8	11	#include <drm/drm_gem_cma_helper.h>
97ac0e47	12	#include <drm/drm_of.h>
fcd70cd3	13	#include <drm/drm_probe_helper.h>
2048e328	14	#include <linux/dma-mapping.h>
1aa5ca6e	15	#include <linux/dma-iommu.h>
2048e328	16	#include <linux/pm_runtime.h>
00fe6148	17	#include <linux/module.h>
2048e328	18	#include <linux/of_graph.h>
3880f62e	19	#include <linux/of_platform.h>
2048e328	20	#include <linux/component.h>
5a587383	21	#include <linux/console.h>
1aa5ca6e	22	#include <linux/iommu.h>
2048e328 MY	23
	24	#include "rockchip_drm_drv.h"
	25	#include "rockchip_drm_fb.h"
	26	#include "rockchip_drm_fbdev.h"
	27	#include "rockchip_drm_gem.h"
	28
	29	#define DRIVER_NAME "rockchip"
	30	#define DRIVER_DESC "RockChip Soc DRM"
	31	#define DRIVER_DATE "20140818"
	32	#define DRIVER_MAJOR 1
	33	#define DRIVER_MINOR 0
	34
2d90d477	35	static bool is_support_iommu = true;
f706974a	36	static struct drm_driver rockchip_drm_driver;
2d90d477	37
2048e328 MY	38	/*
	39	* Attach a (component) device to the shared drm dma mapping from master drm
	40	* device. This is used by the VOPs to map GEM buffers to a common DMA
	41	* mapping.
	42	*/
	43	int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
	44	struct device *dev)
	45	{
1aa5ca6e	46	struct rockchip_drm_private *private = drm_dev->dev_private;
2048e328 MY	47	int ret;
2048e328 MY	48
2d90d477 MY	49	if (!is_support_iommu)
	50	return 0;
	51
1aa5ca6e SZ	52	ret = iommu_attach_device(private->domain, dev);
1aa5ca6e SZ	53	if (ret) {
d8dd6804	54	DRM_DEV_ERROR(dev, "Failed to attach iommu device\n");
2048e328	55	return ret;
1aa5ca6e	56	}
2048e328	57
1aa5ca6e	58	return 0;
2048e328	59	}
2048e328 MY	60
	61	void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
	62	struct device *dev)
	63	{
1aa5ca6e SZ	64	struct rockchip_drm_private *private = drm_dev->dev_private;
	65	struct iommu_domain *domain = private->domain;
	66
2d90d477 MY	67	if (!is_support_iommu)
	68	return;
	69
1aa5ca6e	70	iommu_detach_device(domain, dev);
2048e328	71	}
2048e328	72
1aa5ca6e SZ	73	static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
	74	{
	75	struct rockchip_drm_private *private = drm_dev->dev_private;
	76	struct iommu_domain_geometry *geometry;
	77	u64 start, end;
	78
	79	if (!is_support_iommu)
	80	return 0;
	81
	82	private->domain = iommu_domain_alloc(&platform_bus_type);
	83	if (!private->domain)
	84	return -ENOMEM;
	85
	86	geometry = &private->domain->geometry;
	87	start = geometry->aperture_start;
	88	end = geometry->aperture_end;
	89
	90	DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
	91	start, end);
	92	drm_mm_init(&private->mm, start, end - start + 1);
	93	mutex_init(&private->mm_lock);
	94
	95	return 0;
	96	}
	97
	98	static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
	99	{
	100	struct rockchip_drm_private *private = drm_dev->dev_private;
	101
	102	if (!is_support_iommu)
	103	return;
	104
	105	drm_mm_takedown(&private->mm);
	106	iommu_domain_free(private->domain);
2048e328	107	}
2048e328	108
f706974a	109	static int rockchip_drm_bind(struct device *dev)
2048e328	110	{
f706974a	111	struct drm_device *drm_dev;
2048e328	112	struct rockchip_drm_private *private;
2048e328 MY	113	int ret;
2048e328 MY	114
f706974a	115	drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
0f288605 TG	116	if (IS_ERR(drm_dev))
0f288605 TG	117	return PTR_ERR(drm_dev);
2048e328	118
f706974a TV	119	dev_set_drvdata(dev, drm_dev);
	120
	121	private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
	122	if (!private) {
	123	ret = -ENOMEM;
9127f99c	124	goto err_free;
f706974a TV	125	}
f706974a TV	126
2048e328 MY	127	drm_dev->dev_private = private;
2048e328 MY	128
5182c1a5	129	INIT_LIST_HEAD(&private->psr_list);
60beeccc	130	mutex_init(&private->psr_list_lock);
5182c1a5	131
ccea9199 JC	132	ret = rockchip_drm_init_iommu(drm_dev);
	133	if (ret)
	134	goto err_free;
	135
2048e328 MY	136	drm_mode_config_init(drm_dev);
	137
	138	rockchip_drm_mode_config_init(drm_dev);
	139
2048e328 MY	140	/* Try to bind all sub drivers. */
	141	ret = component_bind_all(dev, drm_dev);
	142	if (ret)
ccea9199	143	goto err_mode_config_cleanup;
2048e328	144
ccea9199 JC	145	ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);
	146	if (ret)
	147	goto err_unbind_all;
	148
	149	drm_mode_config_reset(drm_dev);
2048e328 MY	150
	151	/*
	152	* enable drm irq mode.
	153	* - with irq_enabled = true, we can use the vblank feature.
	154	*/
	155	drm_dev->irq_enabled = true;
	156
2048e328 MY	157	ret = rockchip_drm_fbdev_init(drm_dev);
2048e328 MY	158	if (ret)
8415ab56 M	159	goto err_unbind_all;
	160
	161	/* init kms poll for handling hpd */
	162	drm_kms_helper_poll_init(drm_dev);
2048e328	163
9127f99c TF	164	ret = drm_dev_register(drm_dev, 0);
9127f99c TF	165	if (ret)
8415ab56	166	goto err_kms_helper_poll_fini;
9127f99c	167
2048e328	168	return 0;
2048e328 MY	169	err_kms_helper_poll_fini:
2048e328 MY	170	drm_kms_helper_poll_fini(drm_dev);
8415ab56	171	rockchip_drm_fbdev_fini(drm_dev);
ccea9199	172	err_unbind_all:
2048e328	173	component_unbind_all(dev, drm_dev);
ccea9199	174	err_mode_config_cleanup:
2048e328	175	drm_mode_config_cleanup(drm_dev);
ccea9199	176	rockchip_iommu_cleanup(drm_dev);
f706974a	177	err_free:
ccea9199 JC	178	drm_dev->dev_private = NULL;
ccea9199 JC	179	dev_set_drvdata(dev, NULL);
574e0fbf	180	drm_dev_put(drm_dev);
2048e328 MY	181	return ret;
	182	}
	183
f706974a	184	static void rockchip_drm_unbind(struct device *dev)
2048e328	185	{
f706974a	186	struct drm_device *drm_dev = dev_get_drvdata(dev);
2048e328	187
ccea9199 JC	188	drm_dev_unregister(drm_dev);
ccea9199 JC	189
2048e328	190	rockchip_drm_fbdev_fini(drm_dev);
2048e328	191	drm_kms_helper_poll_fini(drm_dev);
ccea9199	192
c1bb8188	193	drm_atomic_helper_shutdown(drm_dev);
2048e328	194	component_unbind_all(dev, drm_dev);
2048e328	195	drm_mode_config_cleanup(drm_dev);
ccea9199 JC	196	rockchip_iommu_cleanup(drm_dev);
ccea9199 JC	197
2048e328	198	drm_dev->dev_private = NULL;
f706974a	199	dev_set_drvdata(dev, NULL);
574e0fbf	200	drm_dev_put(drm_dev);
2048e328 MY	201	}
2048e328 MY	202
2048e328 MY	203	static const struct file_operations rockchip_drm_driver_fops = {
	204	.owner = THIS_MODULE,
	205	.open = drm_open,
	206	.mmap = rockchip_gem_mmap,
	207	.poll = drm_poll,
	208	.read = drm_read,
	209	.unlocked_ioctl = drm_ioctl,
2048e328	210	.compat_ioctl = drm_compat_ioctl,
2048e328 MY	211	.release = drm_release,
	212	};
	213
2048e328	214	static struct drm_driver rockchip_drm_driver = {
63ebb9fa MY	215	.driver_features = DRIVER_MODESET \| DRIVER_GEM \|
63ebb9fa MY	216	DRIVER_PRIME \| DRIVER_ATOMIC,
33e9d038	217	.lastclose = drm_fb_helper_lastclose,
80f67cd8	218	.gem_vm_ops = &drm_gem_cma_vm_ops,
c2466ac3	219	.gem_free_object_unlocked = rockchip_gem_free_object,
2048e328	220	.dumb_create = rockchip_gem_dumb_create,
2048e328 MY	221	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	222	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	223	.gem_prime_import = drm_gem_prime_import,
	224	.gem_prime_export = drm_gem_prime_export,
	225	.gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
6fd0bfe2	226	.gem_prime_import_sg_table = rockchip_gem_prime_import_sg_table,
2048e328 MY	227	.gem_prime_vmap = rockchip_gem_prime_vmap,
	228	.gem_prime_vunmap = rockchip_gem_prime_vunmap,
	229	.gem_prime_mmap = rockchip_gem_mmap_buf,
	230	.fops = &rockchip_drm_driver_fops,
	231	.name = DRIVER_NAME,
	232	.desc = DRIVER_DESC,
	233	.date = DRIVER_DATE,
	234	.major = DRIVER_MAJOR,
	235	.minor = DRIVER_MINOR,
	236	};
	237
	238	#ifdef CONFIG_PM_SLEEP
5a587383 TV	239	static int rockchip_drm_sys_suspend(struct device *dev)
	240	{
	241	struct drm_device *drm = dev_get_drvdata(dev);
5a587383	242
e7941cc2	243	return drm_mode_config_helper_suspend(drm);
2048e328 MY	244	}
	245
	246	static int rockchip_drm_sys_resume(struct device *dev)
	247	{
	248	struct drm_device *drm = dev_get_drvdata(dev);
0fa375e6	249
e7941cc2	250	return drm_mode_config_helper_resume(drm);
2048e328 MY	251	}
	252	#endif
	253
	254	static const struct dev_pm_ops rockchip_drm_pm_ops = {
	255	SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
	256	rockchip_drm_sys_resume)
	257	};
	258
8820b68b JC	259	#define MAX_ROCKCHIP_SUB_DRIVERS 16
	260	static struct platform_driver *rockchip_sub_drivers[MAX_ROCKCHIP_SUB_DRIVERS];
	261	static int num_rockchip_sub_drivers;
2048e328	262
3880f62e HS	263	/*
	264	* Check if a vop endpoint is leading to a rockchip subdriver or bridge.
	265	* Should be called from the component bind stage of the drivers
	266	* to ensure that all subdrivers are probed.
	267	*
	268	* @ep: endpoint of a rockchip vop
	269	*
	270	* returns true if subdriver, false if external bridge and -ENODEV
	271	* if remote port does not contain a device.
	272	*/
	273	int rockchip_drm_endpoint_is_subdriver(struct device_node *ep)
	274	{
	275	struct device_node *node = of_graph_get_remote_port_parent(ep);
	276	struct platform_device *pdev;
	277	struct device_driver *drv;
	278	int i;
	279
	280	if (!node)
	281	return -ENODEV;
	282
	283	/* status disabled will prevent creation of platform-devices */
	284	pdev = of_find_device_by_node(node);
	285	of_node_put(node);
	286	if (!pdev)
	287	return -ENODEV;
	288
	289	/*
	290	* All rockchip subdrivers have probed at this point, so
	291	* any device not having a driver now is an external bridge.
	292	*/
	293	drv = pdev->dev.driver;
	294	if (!drv) {
	295	platform_device_put(pdev);
	296	return false;
	297	}
	298
	299	for (i = 0; i < num_rockchip_sub_drivers; i++) {
	300	if (rockchip_sub_drivers[i] == to_platform_driver(drv)) {
	301	platform_device_put(pdev);
	302	return true;
	303	}
	304	}
	305
	306	platform_device_put(pdev);
	307	return false;
	308	}
	309
8820b68b JC	310	static int compare_dev(struct device dev, void data)
	311	{
	312	return dev == (struct device *)data;
2048e328 MY	313	}
2048e328 MY	314
7d4e981d JC	315	static void rockchip_drm_match_remove(struct device *dev)
	316	{
	317	struct device_link *link;
	318
	319	list_for_each_entry(link, &dev->links.consumers, s_node)
	320	device_link_del(link);
	321	}
	322
8820b68b	323	static struct component_match rockchip_drm_match_add(struct device dev)
5bad7d29	324	{
8820b68b JC	325	struct component_match *match = NULL;
8820b68b JC	326	int i;
5bad7d29	327
8820b68b JC	328	for (i = 0; i < num_rockchip_sub_drivers; i++) {
	329	struct platform_driver *drv = rockchip_sub_drivers[i];
	330	struct device p = NULL, d;
	331
	332	do {
	333	d = bus_find_device(&platform_bus_type, p, &drv->driver,
	334	(void *)platform_bus_type.match);
	335	put_device(p);
	336	p = d;
5bad7d29	337
8820b68b JC	338	if (!d)
8820b68b JC	339	break;
7d4e981d JC	340
7d4e981d JC	341	device_link_add(dev, d, DL_FLAG_STATELESS);
8820b68b JC	342	component_match_add(dev, &match, compare_dev, d);
8820b68b JC	343	} while (true);
5bad7d29	344	}
8820b68b	345
7d4e981d JC	346	if (IS_ERR(match))
	347	rockchip_drm_match_remove(dev);
	348
8820b68b	349	return match ?: ERR_PTR(-ENODEV);
5bad7d29 MY	350	}
5bad7d29 MY	351
2048e328 MY	352	static const struct component_master_ops rockchip_drm_ops = {
	353	.bind = rockchip_drm_bind,
	354	.unbind = rockchip_drm_unbind,
	355	};
	356
8820b68b	357	static int rockchip_drm_platform_of_probe(struct device *dev)
2048e328	358	{
5bad7d29 MY	359	struct device_node *np = dev->of_node;
5bad7d29 MY	360	struct device_node *port;
8820b68b	361	bool found = false;
5bad7d29	362	int i;
2048e328	363
5bad7d29	364	if (!np)
2048e328	365	return -ENODEV;
8820b68b	366
5bad7d29	367	for (i = 0;; i++) {
2d90d477 MY	368	struct device_node *iommu;
2d90d477 MY	369
5bad7d29 MY	370	port = of_parse_phandle(np, "ports", i);
	371	if (!port)
	372	break;
	373
	374	if (!of_device_is_available(port->parent)) {
	375	of_node_put(port);
	376	continue;
	377	}
2048e328	378
2d90d477 MY	379	iommu = of_parse_phandle(port->parent, "iommus", 0);
2d90d477 MY	380	if (!iommu \|\| !of_device_is_available(iommu->parent)) {
d8dd6804 HM	381	DRM_DEV_DEBUG(dev,
	382	"no iommu attached for %pOF, using non-iommu buffers\n",
	383	port->parent);
2d90d477 MY	384	/*
	385	* if there is a crtc not support iommu, force set all
	386	* crtc use non-iommu buffer.
	387	*/
	388	is_support_iommu = false;
	389	}
	390
8820b68b JC	391	found = true;
8820b68b JC	392
6d5fa28c	393	of_node_put(iommu);
5bad7d29 MY	394	of_node_put(port);
	395	}
	396
	397	if (i == 0) {
d8dd6804	398	DRM_DEV_ERROR(dev, "missing 'ports' property\n");
5bad7d29 MY	399	return -ENODEV;
	400	}
	401
8820b68b	402	if (!found) {
d8dd6804 HM	403	DRM_DEV_ERROR(dev,
d8dd6804 HM	404	"No available vop found for display-subsystem.\n");
5bad7d29 MY	405	return -ENODEV;
5bad7d29 MY	406	}
5bad7d29	407
8820b68b JC	408	return 0;
8820b68b JC	409	}
5bad7d29	410
8820b68b JC	411	static int rockchip_drm_platform_probe(struct platform_device *pdev)
	412	{
	413	struct device *dev = &pdev->dev;
	414	struct component_match *match = NULL;
	415	int ret;
	416
	417	ret = rockchip_drm_platform_of_probe(dev);
	418	if (ret)
	419	return ret;
	420
	421	match = rockchip_drm_match_add(dev);
	422	if (IS_ERR(match))
	423	return PTR_ERR(match);
5bad7d29	424
7d4e981d JC	425	ret = component_master_add_with_match(dev, &rockchip_drm_ops, match);
	426	if (ret < 0) {
	427	rockchip_drm_match_remove(dev);
	428	return ret;
	429	}
	430
	431	return 0;
2048e328 MY	432	}
	433
	434	static int rockchip_drm_platform_remove(struct platform_device *pdev)
	435	{
	436	component_master_del(&pdev->dev, &rockchip_drm_ops);
	437
7d4e981d JC	438	rockchip_drm_match_remove(&pdev->dev);
7d4e981d JC	439
2048e328 MY	440	return 0;
	441	}
	442
b8f9d7f3 VB	443	static void rockchip_drm_platform_shutdown(struct platform_device *pdev)
	444	{
	445	struct drm_device *drm = platform_get_drvdata(pdev);
	446
	447	if (drm)
	448	drm_atomic_helper_shutdown(drm);
	449	}
	450
2048e328 MY	451	static const struct of_device_id rockchip_drm_dt_ids[] = {
	452	{ .compatible = "rockchip,display-subsystem", },
	453	{ /* sentinel */ },
	454	};
	455	MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
	456
	457	static struct platform_driver rockchip_drm_platform_driver = {
	458	.probe = rockchip_drm_platform_probe,
	459	.remove = rockchip_drm_platform_remove,
b8f9d7f3	460	.shutdown = rockchip_drm_platform_shutdown,
2048e328	461	.driver = {
2048e328 MY	462	.name = "rockchip-drm",
	463	.of_match_table = rockchip_drm_dt_ids,
	464	.pm = &rockchip_drm_pm_ops,
	465	},
	466	};
	467
8820b68b JC	468	#define ADD_ROCKCHIP_SUB_DRIVER(drv, cond) { \
	469	if (IS_ENABLED(cond) && \
	470	!WARN_ON(num_rockchip_sub_drivers >= MAX_ROCKCHIP_SUB_DRIVERS)) \
	471	rockchip_sub_drivers[num_rockchip_sub_drivers++] = &drv; \
	472	}
	473
	474	static int __init rockchip_drm_init(void)
	475	{
	476	int ret;
	477
	478	num_rockchip_sub_drivers = 0;
	479	ADD_ROCKCHIP_SUB_DRIVER(vop_platform_driver, CONFIG_DRM_ROCKCHIP);
34cc0aa2 SH	480	ADD_ROCKCHIP_SUB_DRIVER(rockchip_lvds_driver,
34cc0aa2 SH	481	CONFIG_ROCKCHIP_LVDS);
8820b68b JC	482	ADD_ROCKCHIP_SUB_DRIVER(rockchip_dp_driver,
	483	CONFIG_ROCKCHIP_ANALOGIX_DP);
	484	ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
	485	ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver,
	486	CONFIG_ROCKCHIP_DW_HDMI);
2d4f7bda	487	ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_rockchip_driver,
8820b68b JC	488	CONFIG_ROCKCHIP_DW_MIPI_DSI);
8820b68b JC	489	ADD_ROCKCHIP_SUB_DRIVER(inno_hdmi_driver, CONFIG_ROCKCHIP_INNO_HDMI);
f84d3d37 ZY	490	ADD_ROCKCHIP_SUB_DRIVER(rk3066_hdmi_driver,
f84d3d37 ZY	491	CONFIG_ROCKCHIP_RK3066_HDMI);
8820b68b JC	492
	493	ret = platform_register_drivers(rockchip_sub_drivers,
	494	num_rockchip_sub_drivers);
	495	if (ret)
	496	return ret;
	497
	498	ret = platform_driver_register(&rockchip_drm_platform_driver);
	499	if (ret)
	500	goto err_unreg_drivers;
	501
	502	return 0;
	503
	504	err_unreg_drivers:
	505	platform_unregister_drivers(rockchip_sub_drivers,
	506	num_rockchip_sub_drivers);
	507	return ret;
	508	}
	509
	510	static void __exit rockchip_drm_fini(void)
	511	{
	512	platform_driver_unregister(&rockchip_drm_platform_driver);
	513
	514	platform_unregister_drivers(rockchip_sub_drivers,
	515	num_rockchip_sub_drivers);
	516	}
	517
	518	module_init(rockchip_drm_init);
	519	module_exit(rockchip_drm_fini);
2048e328 MY	520
	521	MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
	522	MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
	523	MODULE_LICENSE("GPL v2");