[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / sti / sti_drv.c

/*
 * Copyright (C) STMicroelectronics SA 2014
 * Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
 * License terms:  GNU General Public License (GPL), version 2
 */

#include <drm/drmP.h>

#include <linux/component.h>
#include <linux/debugfs.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_platform.h>

#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>

#include "sti_crtc.h"
#include "sti_drv.h"
#include "sti_plane.h"

#define DRIVER_NAME	"sti"
#define DRIVER_DESC	"STMicroelectronics SoC DRM"
#define DRIVER_DATE	"20140601"
#define DRIVER_MAJOR	1
#define DRIVER_MINOR	0

#define STI_MAX_FB_HEIGHT	4096
#define STI_MAX_FB_WIDTH	4096

static int sti_drm_fps_get(void *data, u64 *val)
{
	struct drm_device *drm_dev = data;
	struct drm_plane *p;
	unsigned int i = 0;

	*val = 0;
	list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
		struct sti_plane *plane = to_sti_plane(p);

		*val |= plane->fps_info.output << i;
		i++;
	}

	return 0;
}

static int sti_drm_fps_set(void *data, u64 val)
{
	struct drm_device *drm_dev = data;
	struct drm_plane *p;
	unsigned int i = 0;

	list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
		struct sti_plane *plane = to_sti_plane(p);

		plane->fps_info.output = (val >> i) & 1;
		i++;
	}

	return 0;
}

DEFINE_SIMPLE_ATTRIBUTE(sti_drm_fps_fops,
			sti_drm_fps_get, sti_drm_fps_set, "%llu\n");

static int sti_drm_fps_dbg_show(struct seq_file *s, void *data)
{
	struct drm_info_node *node = s->private;
	struct drm_device *dev = node->minor->dev;
	struct drm_plane *p;

	list_for_each_entry(p, &dev->mode_config.plane_list, head) {
		struct sti_plane *plane = to_sti_plane(p);

		seq_printf(s, "%s%s\n",
			   plane->fps_info.fps_str,
			   plane->fps_info.fips_str);
	}

	return 0;
}

static struct drm_info_list sti_drm_dbg_list[] = {
	{"fps_get", sti_drm_fps_dbg_show, 0},
};

static int sti_drm_debugfs_create(struct dentry *root,
				  struct drm_minor *minor,
				  const char *name,
				  const struct file_operations *fops)
{
	struct drm_device *dev = minor->dev;
	struct drm_info_node *node;
	struct dentry *ent;

	ent = debugfs_create_file(name, S_IRUGO | S_IWUSR, root, dev, fops);
	if (IS_ERR(ent))
		return PTR_ERR(ent);

	node = kmalloc(sizeof(*node), GFP_KERNEL);
	if (!node) {
		debugfs_remove(ent);
		return -ENOMEM;
	}

	node->minor = minor;
	node->dent = ent;
	node->info_ent = (void *)fops;

	mutex_lock(&minor->debugfs_lock);
	list_add(&node->list, &minor->debugfs_list);
	mutex_unlock(&minor->debugfs_lock);

	return 0;
}

static int sti_drm_dbg_init(struct drm_minor *minor)
{
	int ret;

	ret = drm_debugfs_create_files(sti_drm_dbg_list,
				       ARRAY_SIZE(sti_drm_dbg_list),
				       minor->debugfs_root, minor);
	if (ret)
		goto err;

	ret = sti_drm_debugfs_create(minor->debugfs_root, minor, "fps_show",
				     &sti_drm_fps_fops);
	if (ret)
		goto err;

	DRM_INFO("%s: debugfs installed\n", DRIVER_NAME);
	return 0;
err:
	DRM_ERROR("%s: cannot install debugfs\n", DRIVER_NAME);
	return ret;
}

static void sti_drm_dbg_cleanup(struct drm_minor *minor)
{
	drm_debugfs_remove_files(sti_drm_dbg_list,
				 ARRAY_SIZE(sti_drm_dbg_list), minor);

	drm_debugfs_remove_files((struct drm_info_list *)&sti_drm_fps_fops,
				 1, minor);
}

static void sti_atomic_schedule(struct sti_private *private,
				struct drm_atomic_state *state)
{
	private->commit.state = state;
	schedule_work(&private->commit.work);
}

static void sti_atomic_complete(struct sti_private *private,
				struct drm_atomic_state *state)
{
	struct drm_device *drm = private->drm_dev;

	/*
	 * Everything below can be run asynchronously without the need to grab
	 * any modeset locks at all under one condition: It must be guaranteed
	 * that the asynchronous work has either been cancelled (if the driver
	 * supports it, which at least requires that the framebuffers get
	 * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
	 * before the new state gets committed on the software side with
	 * drm_atomic_helper_swap_state().
	 *
	 * This scheme allows new atomic state updates to be prepared and
	 * checked in parallel to the asynchronous completion of the previous
	 * update. Which is important since compositors need to figure out the
	 * composition of the next frame right after having submitted the
	 * current layout.
	 */

	drm_atomic_helper_commit_modeset_disables(drm, state);
	drm_atomic_helper_commit_planes(drm, state, 0);
	drm_atomic_helper_commit_modeset_enables(drm, state);

	drm_atomic_helper_wait_for_vblanks(drm, state);

	drm_atomic_helper_cleanup_planes(drm, state);
	drm_atomic_state_free(state);
}

static void sti_atomic_work(struct work_struct *work)
{
	struct sti_private *private = container_of(work,
			struct sti_private, commit.work);

	sti_atomic_complete(private, private->commit.state);
}

static int sti_atomic_check(struct drm_device *dev,
			    struct drm_atomic_state *state)
{
	int ret;

	ret = drm_atomic_helper_check_modeset(dev, state);
	if (ret)
		return ret;

	ret = drm_atomic_normalize_zpos(dev, state);
	if (ret)
		return ret;

	ret = drm_atomic_helper_check_planes(dev, state);
	if (ret)
		return ret;

	return ret;
}

static int sti_atomic_commit(struct drm_device *drm,
			     struct drm_atomic_state *state, bool nonblock)
{
	struct sti_private *private = drm->dev_private;
	int err;

	err = drm_atomic_helper_prepare_planes(drm, state);
	if (err)
		return err;

	/* serialize outstanding nonblocking commits */
	mutex_lock(&private->commit.lock);
	flush_work(&private->commit.work);

	/*
	 * This is the point of no return - everything below never fails except
	 * when the hw goes bonghits. Which means we can commit the new state on
	 * the software side now.
	 */

	drm_atomic_helper_swap_state(state, true);

	if (nonblock)
		sti_atomic_schedule(private, state);
	else
		sti_atomic_complete(private, state);

	mutex_unlock(&private->commit.lock);
	return 0;
}

static void sti_output_poll_changed(struct drm_device *ddev)
{
	struct sti_private *private = ddev->dev_private;

	if (!ddev->mode_config.num_connector)
		return;

	if (private->fbdev) {
		drm_fbdev_cma_hotplug_event(private->fbdev);
		return;
	}

	private->fbdev = drm_fbdev_cma_init(ddev, 32,
					    ddev->mode_config.num_crtc,
					    ddev->mode_config.num_connector);
	if (IS_ERR(private->fbdev))
		private->fbdev = NULL;
}

static const struct drm_mode_config_funcs sti_mode_config_funcs = {
	.fb_create = drm_fb_cma_create,
	.output_poll_changed = sti_output_poll_changed,
	.atomic_check = sti_atomic_check,
	.atomic_commit = sti_atomic_commit,
};

static void sti_mode_config_init(struct drm_device *dev)
{
	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;

	/*
	 * set max width and height as default value.
	 * this value would be used to check framebuffer size limitation
	 * at drm_mode_addfb().
	 */
	dev->mode_config.max_width = STI_MAX_FB_WIDTH;
	dev->mode_config.max_height = STI_MAX_FB_HEIGHT;

	dev->mode_config.funcs = &sti_mode_config_funcs;
}

static const struct file_operations sti_driver_fops = {
	.owner = THIS_MODULE,
	.open = drm_open,
	.mmap = drm_gem_cma_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 sti_driver = {
	.driver_features = DRIVER_MODESET |
	    DRIVER_GEM | DRIVER_PRIME | DRIVER_ATOMIC,
	.gem_free_object_unlocked = 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,
	.fops = &sti_driver_fops,

	.get_vblank_counter = drm_vblank_no_hw_counter,
	.enable_vblank = sti_crtc_enable_vblank,
	.disable_vblank = sti_crtc_disable_vblank,

	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	.gem_prime_export = drm_gem_prime_export,
	.gem_prime_import = drm_gem_prime_import,
	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	.gem_prime_mmap = drm_gem_cma_prime_mmap,

	.debugfs_init = sti_drm_dbg_init,
	.debugfs_cleanup = sti_drm_dbg_cleanup,

	.name = DRIVER_NAME,
	.desc = DRIVER_DESC,
	.date = DRIVER_DATE,
	.major = DRIVER_MAJOR,
	.minor = DRIVER_MINOR,
};

static int compare_of(struct device *dev, void *data)
{
	return dev->of_node == data;
}

static int sti_init(struct drm_device *ddev)
{
	struct sti_private *private;

	private = kzalloc(sizeof(*private), GFP_KERNEL);
	if (!private)
		return -ENOMEM;

	ddev->dev_private = (void *)private;
	dev_set_drvdata(ddev->dev, ddev);
	private->drm_dev = ddev;

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

	drm_mode_config_init(ddev);

	sti_mode_config_init(ddev);

	drm_kms_helper_poll_init(ddev);

	return 0;
}

static void sti_cleanup(struct drm_device *ddev)
{
	struct sti_private *private = ddev->dev_private;

	if (private->fbdev) {
		drm_fbdev_cma_fini(private->fbdev);
		private->fbdev = NULL;
	}

	drm_kms_helper_poll_fini(ddev);
	drm_vblank_cleanup(ddev);
	kfree(private);
	ddev->dev_private = NULL;
}

static int sti_bind(struct device *dev)
{
	struct drm_device *ddev;
	int ret;

	ddev = drm_dev_alloc(&sti_driver, dev);
	if (IS_ERR(ddev))
		return PTR_ERR(ddev);

	ddev->platformdev = to_platform_device(dev);

	ret = sti_init(ddev);
	if (ret)
		goto err_drm_dev_unref;

	ret = component_bind_all(ddev->dev, ddev);
	if (ret)
		goto err_cleanup;

	ret = drm_dev_register(ddev, 0);
	if (ret)
		goto err_register;

	drm_mode_config_reset(ddev);

	return 0;

err_register:
	drm_mode_config_cleanup(ddev);
err_cleanup:
	sti_cleanup(ddev);
err_drm_dev_unref:
	drm_dev_unref(ddev);
	return ret;
}

static void sti_unbind(struct device *dev)
{
	struct drm_device *ddev = dev_get_drvdata(dev);

	drm_dev_unregister(ddev);
	sti_cleanup(ddev);
	drm_dev_unref(ddev);
}

static const struct component_master_ops sti_ops = {
	.bind = sti_bind,
	.unbind = sti_unbind,
};

static int sti_platform_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *node = dev->of_node;
	struct device_node *child_np;
	struct component_match *match = NULL;

	dma_set_coherent_mask(dev, DMA_BIT_MASK(32));

	of_platform_populate(node, NULL, NULL, dev);

	child_np = of_get_next_available_child(node, NULL);

	while (child_np) {
		component_match_add(dev, &match, compare_of, child_np);
		of_node_put(child_np);
		child_np = of_get_next_available_child(node, child_np);
	}

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

static int sti_platform_remove(struct platform_device *pdev)
{
	component_master_del(&pdev->dev, &sti_ops);
	of_platform_depopulate(&pdev->dev);

	return 0;
}

static const struct of_device_id sti_dt_ids[] = {
	{ .compatible = "st,sti-display-subsystem", },
	{ /* end node */ },
};
MODULE_DEVICE_TABLE(of, sti_dt_ids);

static struct platform_driver sti_platform_driver = {
	.probe = sti_platform_probe,
	.remove = sti_platform_remove,
	.driver = {
		.name = DRIVER_NAME,
		.of_match_table = sti_dt_ids,
	},
};

static struct platform_driver * const drivers[] = {
	&sti_tvout_driver,
	&sti_vtac_driver,
	&sti_hqvdp_driver,
	&sti_hdmi_driver,
	&sti_hda_driver,
	&sti_dvo_driver,
	&sti_vtg_driver,
	&sti_compositor_driver,
	&sti_platform_driver,
};

static int sti_drm_init(void)
{
	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
}
module_init(sti_drm_init);

static void sti_drm_exit(void)
{
	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
}
module_exit(sti_drm_exit);

MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
9bbf86fe BG	1	/*
	2	* Copyright (C) STMicroelectronics SA 2014
	3	* Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
	4	* License terms: GNU General Public License (GPL), version 2
	5	*/
	6
	7	#include <drm/drmP.h>
	8
	9	#include <linux/component.h>
	10	#include <linux/debugfs.h>
	11	#include <linux/kernel.h>
	12	#include <linux/module.h>
	13	#include <linux/of_platform.h>
	14
de4b00b0 BG	15	#include <drm/drm_atomic.h>
de4b00b0 BG	16	#include <drm/drm_atomic_helper.h>
9bbf86fe BG	17	#include <drm/drm_crtc_helper.h>
	18	#include <drm/drm_gem_cma_helper.h>
	19	#include <drm/drm_fb_cma_helper.h>
	20
9e1f05b2 VA	21	#include "sti_crtc.h"
9e1f05b2 VA	22	#include "sti_drv.h"
bf8f9e4a	23	#include "sti_plane.h"
9bbf86fe BG	24
	25	#define DRIVER_NAME "sti"
	26	#define DRIVER_DESC "STMicroelectronics SoC DRM"
	27	#define DRIVER_DATE "20140601"
	28	#define DRIVER_MAJOR 1
	29	#define DRIVER_MINOR 0
	30
	31	#define STI_MAX_FB_HEIGHT 4096
	32	#define STI_MAX_FB_WIDTH 4096
	33
bf8f9e4a VA	34	static int sti_drm_fps_get(void data, u64 val)
	35	{
	36	struct drm_device *drm_dev = data;
	37	struct drm_plane *p;
	38	unsigned int i = 0;
	39
	40	*val = 0;
	41	list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
	42	struct sti_plane *plane = to_sti_plane(p);
	43
	44	*val \|= plane->fps_info.output << i;
	45	i++;
	46	}
	47
	48	return 0;
	49	}
	50
	51	static int sti_drm_fps_set(void *data, u64 val)
	52	{
	53	struct drm_device *drm_dev = data;
	54	struct drm_plane *p;
	55	unsigned int i = 0;
	56
	57	list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
	58	struct sti_plane *plane = to_sti_plane(p);
	59
	60	plane->fps_info.output = (val >> i) & 1;
	61	i++;
	62	}
	63
	64	return 0;
	65	}
	66
	67	DEFINE_SIMPLE_ATTRIBUTE(sti_drm_fps_fops,
	68	sti_drm_fps_get, sti_drm_fps_set, "%llu\n");
	69
	70	static int sti_drm_fps_dbg_show(struct seq_file s, void data)
	71	{
	72	struct drm_info_node *node = s->private;
	73	struct drm_device *dev = node->minor->dev;
	74	struct drm_plane *p;
bf8f9e4a VA	75
	76	list_for_each_entry(p, &dev->mode_config.plane_list, head) {
	77	struct sti_plane *plane = to_sti_plane(p);
	78
	79	seq_printf(s, "%s%s\n",
	80	plane->fps_info.fps_str,
	81	plane->fps_info.fips_str);
	82	}
	83
bf8f9e4a VA	84	return 0;
	85	}
	86
	87	static struct drm_info_list sti_drm_dbg_list[] = {
	88	{"fps_get", sti_drm_fps_dbg_show, 0},
	89	};
	90
	91	static int sti_drm_debugfs_create(struct dentry *root,
	92	struct drm_minor *minor,
	93	const char *name,
	94	const struct file_operations *fops)
	95	{
	96	struct drm_device *dev = minor->dev;
	97	struct drm_info_node *node;
	98	struct dentry *ent;
	99
	100	ent = debugfs_create_file(name, S_IRUGO \| S_IWUSR, root, dev, fops);
	101	if (IS_ERR(ent))
	102	return PTR_ERR(ent);
	103
	104	node = kmalloc(sizeof(*node), GFP_KERNEL);
	105	if (!node) {
	106	debugfs_remove(ent);
	107	return -ENOMEM;
	108	}
	109
	110	node->minor = minor;
	111	node->dent = ent;
	112	node->info_ent = (void *)fops;
	113
	114	mutex_lock(&minor->debugfs_lock);
	115	list_add(&node->list, &minor->debugfs_list);
	116	mutex_unlock(&minor->debugfs_lock);
	117
	118	return 0;
	119	}
	120
	121	static int sti_drm_dbg_init(struct drm_minor *minor)
	122	{
	123	int ret;
	124
	125	ret = drm_debugfs_create_files(sti_drm_dbg_list,
	126	ARRAY_SIZE(sti_drm_dbg_list),
	127	minor->debugfs_root, minor);
	128	if (ret)
	129	goto err;
	130
	131	ret = sti_drm_debugfs_create(minor->debugfs_root, minor, "fps_show",
	132	&sti_drm_fps_fops);
	133	if (ret)
	134	goto err;
	135
	136	DRM_INFO("%s: debugfs installed\n", DRIVER_NAME);
	137	return 0;
	138	err:
	139	DRM_ERROR("%s: cannot install debugfs\n", DRIVER_NAME);
	140	return ret;
	141	}
	142
bdfd36ef	143	static void sti_drm_dbg_cleanup(struct drm_minor *minor)
bf8f9e4a VA	144	{
	145	drm_debugfs_remove_files(sti_drm_dbg_list,
	146	ARRAY_SIZE(sti_drm_dbg_list), minor);
	147
	148	drm_debugfs_remove_files((struct drm_info_list *)&sti_drm_fps_fops,
	149	1, minor);
	150	}
	151
9e1f05b2 VA	152	static void sti_atomic_schedule(struct sti_private *private,
9e1f05b2 VA	153	struct drm_atomic_state *state)
de4b00b0 BG	154	{
	155	private->commit.state = state;
	156	schedule_work(&private->commit.work);
	157	}
	158
9e1f05b2 VA	159	static void sti_atomic_complete(struct sti_private *private,
9e1f05b2 VA	160	struct drm_atomic_state *state)
de4b00b0 BG	161	{
	162	struct drm_device *drm = private->drm_dev;
	163
	164	/*
	165	* Everything below can be run asynchronously without the need to grab
	166	* any modeset locks at all under one condition: It must be guaranteed
	167	* that the asynchronous work has either been cancelled (if the driver
	168	* supports it, which at least requires that the framebuffers get
	169	* cleaned up with drm_atomic_helper_cleanup_planes()) or completed
	170	* before the new state gets committed on the software side with
	171	* drm_atomic_helper_swap_state().
	172	*
	173	* This scheme allows new atomic state updates to be prepared and
	174	* checked in parallel to the asynchronous completion of the previous
	175	* update. Which is important since compositors need to figure out the
	176	* composition of the next frame right after having submitted the
	177	* current layout.
	178	*/
	179
	180	drm_atomic_helper_commit_modeset_disables(drm, state);
2b58e98d	181	drm_atomic_helper_commit_planes(drm, state, 0);
de4b00b0 BG	182	drm_atomic_helper_commit_modeset_enables(drm, state);
	183
	184	drm_atomic_helper_wait_for_vblanks(drm, state);
	185
	186	drm_atomic_helper_cleanup_planes(drm, state);
	187	drm_atomic_state_free(state);
	188	}
	189
9e1f05b2	190	static void sti_atomic_work(struct work_struct *work)
de4b00b0	191	{
9e1f05b2 VA	192	struct sti_private *private = container_of(work,
9e1f05b2 VA	193	struct sti_private, commit.work);
de4b00b0	194
9e1f05b2	195	sti_atomic_complete(private, private->commit.state);
de4b00b0 BG	196	}
de4b00b0 BG	197
38d868e4 VS	198	static int sti_atomic_check(struct drm_device *dev,
	199	struct drm_atomic_state *state)
	200	{
	201	int ret;
	202
	203	ret = drm_atomic_helper_check_modeset(dev, state);
	204	if (ret)
	205	return ret;
	206
	207	ret = drm_atomic_normalize_zpos(dev, state);
	208	if (ret)
	209	return ret;
	210
	211	ret = drm_atomic_helper_check_planes(dev, state);
	212	if (ret)
	213	return ret;
	214
	215	return ret;
	216	}
	217
9e1f05b2	218	static int sti_atomic_commit(struct drm_device *drm,
ab575184	219	struct drm_atomic_state *state, bool nonblock)
de4b00b0	220	{
9e1f05b2	221	struct sti_private *private = drm->dev_private;
de4b00b0 BG	222	int err;
	223
	224	err = drm_atomic_helper_prepare_planes(drm, state);
	225	if (err)
	226	return err;
	227
ab575184	228	/* serialize outstanding nonblocking commits */
de4b00b0 BG	229	mutex_lock(&private->commit.lock);
	230	flush_work(&private->commit.work);
	231
	232	/*
	233	* This is the point of no return - everything below never fails except
	234	* when the hw goes bonghits. Which means we can commit the new state on
	235	* the software side now.
	236	*/
	237
5e84c269	238	drm_atomic_helper_swap_state(state, true);
de4b00b0	239
ab575184	240	if (nonblock)
9e1f05b2	241	sti_atomic_schedule(private, state);
de4b00b0	242	else
9e1f05b2	243	sti_atomic_complete(private, state);
de4b00b0 BG	244
	245	mutex_unlock(&private->commit.lock);
	246	return 0;
	247	}
	248
84601dbd BG	249	static void sti_output_poll_changed(struct drm_device *ddev)
	250	{
	251	struct sti_private *private = ddev->dev_private;
	252
	253	if (!ddev->mode_config.num_connector)
	254	return;
	255
	256	if (private->fbdev) {
	257	drm_fbdev_cma_hotplug_event(private->fbdev);
	258	return;
	259	}
	260
	261	private->fbdev = drm_fbdev_cma_init(ddev, 32,
	262	ddev->mode_config.num_crtc,
	263	ddev->mode_config.num_connector);
	264	if (IS_ERR(private->fbdev))
	265	private->fbdev = NULL;
	266	}
	267
c5de4853	268	static const struct drm_mode_config_funcs sti_mode_config_funcs = {
9bbf86fe	269	.fb_create = drm_fb_cma_create,
84601dbd	270	.output_poll_changed = sti_output_poll_changed,
38d868e4	271	.atomic_check = sti_atomic_check,
9e1f05b2	272	.atomic_commit = sti_atomic_commit,
9bbf86fe BG	273	};
9bbf86fe BG	274
9e1f05b2	275	static void sti_mode_config_init(struct drm_device *dev)
9bbf86fe BG	276	{
	277	dev->mode_config.min_width = 0;
	278	dev->mode_config.min_height = 0;
	279
	280	/*
	281	* set max width and height as default value.
	282	* this value would be used to check framebuffer size limitation
	283	* at drm_mode_addfb().
	284	*/
738be9d6 VA	285	dev->mode_config.max_width = STI_MAX_FB_WIDTH;
738be9d6 VA	286	dev->mode_config.max_height = STI_MAX_FB_HEIGHT;
9bbf86fe	287
9e1f05b2	288	dev->mode_config.funcs = &sti_mode_config_funcs;
9bbf86fe BG	289	}
9bbf86fe BG	290
9e1f05b2	291	static const struct file_operations sti_driver_fops = {
9bbf86fe BG	292	.owner = THIS_MODULE,
	293	.open = drm_open,
	294	.mmap = drm_gem_cma_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
9e1f05b2	304	static struct drm_driver sti_driver = {
e1f96ef4	305	.driver_features = DRIVER_MODESET \|
f29ddaf1	306	DRIVER_GEM \| DRIVER_PRIME \| DRIVER_ATOMIC,
d41ec9ca	307	.gem_free_object_unlocked = drm_gem_cma_free_object,
9bbf86fe BG	308	.gem_vm_ops = &drm_gem_cma_vm_ops,
	309	.dumb_create = drm_gem_cma_dumb_create,
	310	.dumb_map_offset = drm_gem_cma_dumb_map_offset,
	311	.dumb_destroy = drm_gem_dumb_destroy,
9e1f05b2	312	.fops = &sti_driver_fops,
9bbf86fe	313
b44f8408	314	.get_vblank_counter = drm_vblank_no_hw_counter,
9e1f05b2 VA	315	.enable_vblank = sti_crtc_enable_vblank,
9e1f05b2 VA	316	.disable_vblank = sti_crtc_disable_vblank,
9bbf86fe BG	317
	318	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	319	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
ffd157ce	320	.gem_prime_export = drm_gem_prime_export,
9bbf86fe BG	321	.gem_prime_import = drm_gem_prime_import,
	322	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	323	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	324	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	325	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	326	.gem_prime_mmap = drm_gem_cma_prime_mmap,
	327
bf8f9e4a VA	328	.debugfs_init = sti_drm_dbg_init,
	329	.debugfs_cleanup = sti_drm_dbg_cleanup,
	330
9bbf86fe BG	331	.name = DRIVER_NAME,
	332	.desc = DRIVER_DESC,
	333	.date = DRIVER_DATE,
	334	.major = DRIVER_MAJOR,
	335	.minor = DRIVER_MINOR,
	336	};
	337
	338	static int compare_of(struct device dev, void data)
	339	{
	340	return dev->of_node == data;
	341	}
	342
84601dbd BG	343	static int sti_init(struct drm_device *ddev)
	344	{
	345	struct sti_private *private;
	346
	347	private = kzalloc(sizeof(*private), GFP_KERNEL);
	348	if (!private)
	349	return -ENOMEM;
	350
	351	ddev->dev_private = (void *)private;
	352	dev_set_drvdata(ddev->dev, ddev);
	353	private->drm_dev = ddev;
	354
	355	mutex_init(&private->commit.lock);
	356	INIT_WORK(&private->commit.work, sti_atomic_work);
	357
	358	drm_mode_config_init(ddev);
	359
	360	sti_mode_config_init(ddev);
	361
	362	drm_kms_helper_poll_init(ddev);
	363
	364	return 0;
	365	}
	366
	367	static void sti_cleanup(struct drm_device *ddev)
	368	{
	369	struct sti_private *private = ddev->dev_private;
	370
	371	if (private->fbdev) {
	372	drm_fbdev_cma_fini(private->fbdev);
	373	private->fbdev = NULL;
	374	}
	375
	376	drm_kms_helper_poll_fini(ddev);
	377	drm_vblank_cleanup(ddev);
	378	kfree(private);
	379	ddev->dev_private = NULL;
	380	}
	381
9e1f05b2	382	static int sti_bind(struct device *dev)
9bbf86fe	383	{
84601dbd BG	384	struct drm_device *ddev;
	385	int ret;
	386
	387	ddev = drm_dev_alloc(&sti_driver, dev);
0f288605 TG	388	if (IS_ERR(ddev))
0f288605 TG	389	return PTR_ERR(ddev);
84601dbd BG	390
	391	ddev->platformdev = to_platform_device(dev);
	392
	393	ret = sti_init(ddev);
	394	if (ret)
	395	goto err_drm_dev_unref;
	396
	397	ret = component_bind_all(ddev->dev, ddev);
	398	if (ret)
	399	goto err_cleanup;
	400
	401	ret = drm_dev_register(ddev, 0);
	402	if (ret)
	403	goto err_register;
	404
	405	drm_mode_config_reset(ddev);
	406
	407	return 0;
	408
	409	err_register:
	410	drm_mode_config_cleanup(ddev);
	411	err_cleanup:
	412	sti_cleanup(ddev);
	413	err_drm_dev_unref:
	414	drm_dev_unref(ddev);
	415	return ret;
9bbf86fe BG	416	}
9bbf86fe BG	417
9e1f05b2	418	static void sti_unbind(struct device *dev)
9bbf86fe	419	{
84601dbd BG	420	struct drm_device *ddev = dev_get_drvdata(dev);
	421
	422	drm_dev_unregister(ddev);
	423	sti_cleanup(ddev);
	424	drm_dev_unref(ddev);
9bbf86fe BG	425	}
9bbf86fe BG	426
9e1f05b2 VA	427	static const struct component_master_ops sti_ops = {
	428	.bind = sti_bind,
	429	.unbind = sti_unbind,
9bbf86fe BG	430	};
9bbf86fe BG	431
9e1f05b2	432	static int sti_platform_probe(struct platform_device *pdev)
9bbf86fe BG	433	{
9bbf86fe BG	434	struct device *dev = &pdev->dev;
53bdcf5f	435	struct device_node *node = dev->of_node;
9bbf86fe BG	436	struct device_node *child_np;
	437	struct component_match *match = NULL;
	438
	439	dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
	440
53bdcf5f BG	441	of_platform_populate(node, NULL, NULL, dev);
53bdcf5f BG	442
9bbf86fe BG	443	child_np = of_get_next_available_child(node, NULL);
	444
	445	while (child_np) {
	446	component_match_add(dev, &match, compare_of, child_np);
	447	of_node_put(child_np);
	448	child_np = of_get_next_available_child(node, child_np);
	449	}
	450
9e1f05b2	451	return component_master_add_with_match(dev, &sti_ops, match);
9bbf86fe BG	452	}
9bbf86fe BG	453
9e1f05b2	454	static int sti_platform_remove(struct platform_device *pdev)
9bbf86fe	455	{
9e1f05b2	456	component_master_del(&pdev->dev, &sti_ops);
9bbf86fe	457	of_platform_depopulate(&pdev->dev);
53bdcf5f	458
9bbf86fe BG	459	return 0;
	460	}
	461
9e1f05b2	462	static const struct of_device_id sti_dt_ids[] = {
9bbf86fe BG	463	{ .compatible = "st,sti-display-subsystem", },
	464	{ /* end node */ },
	465	};
9e1f05b2	466	MODULE_DEVICE_TABLE(of, sti_dt_ids);
9bbf86fe	467
9e1f05b2 VA	468	static struct platform_driver sti_platform_driver = {
	469	.probe = sti_platform_probe,
	470	.remove = sti_platform_remove,
9bbf86fe	471	.driver = {
9bbf86fe	472	.name = DRIVER_NAME,
9e1f05b2	473	.of_match_table = sti_dt_ids,
9bbf86fe BG	474	},
	475	};
	476
dcec16ef TR	477	static struct platform_driver * const drivers[] = {
	478	&sti_tvout_driver,
	479	&sti_vtac_driver,
	480	&sti_hqvdp_driver,
	481	&sti_hdmi_driver,
	482	&sti_hda_driver,
	483	&sti_dvo_driver,
	484	&sti_vtg_driver,
	485	&sti_compositor_driver,
	486	&sti_platform_driver,
	487	};
	488
	489	static int sti_drm_init(void)
	490	{
	491	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
	492	}
	493	module_init(sti_drm_init);
	494
	495	static void sti_drm_exit(void)
	496	{
	497	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
	498	}
	499	module_exit(sti_drm_exit);
9bbf86fe BG	500
	501	MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
	502	MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
	503	MODULE_LICENSE("GPL");