[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / zte / zx_drm_drv.c

/*
 * Copyright 2016 Linaro Ltd.
 * Copyright 2016 ZTE Corporation.
 *
 * 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.
 *
 */

#include <linux/clk.h>
#include <linux/component.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/of_platform.h>
#include <linux/spinlock.h>

#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_of.h>
#include <drm/drmP.h>

#include "zx_drm_drv.h"
#include "zx_vou.h"

struct zx_drm_private {
	struct drm_fbdev_cma *fbdev;
};

static void zx_drm_fb_output_poll_changed(struct drm_device *drm)
{
	struct zx_drm_private *priv = drm->dev_private;

	drm_fbdev_cma_hotplug_event(priv->fbdev);
}

static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = {
	.fb_create = drm_fb_cma_create,
	.output_poll_changed = zx_drm_fb_output_poll_changed,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = drm_atomic_helper_commit,
};

static void zx_drm_lastclose(struct drm_device *drm)
{
	struct zx_drm_private *priv = drm->dev_private;

	drm_fbdev_cma_restore_mode(priv->fbdev);
}

DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);

static struct drm_driver zx_drm_driver = {
	.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
			   DRIVER_ATOMIC,
	.lastclose = zx_drm_lastclose,
	.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,
	.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,
	.fops = &zx_drm_fops,
	.name = "zx-vou",
	.desc = "ZTE VOU Controller DRM",
	.date = "20160811",
	.major = 1,
	.minor = 0,
};

static int zx_drm_bind(struct device *dev)
{
	struct drm_device *drm;
	struct zx_drm_private *priv;
	int ret;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	drm = drm_dev_alloc(&zx_drm_driver, dev);
	if (IS_ERR(drm))
		return PTR_ERR(drm);

	drm->dev_private = priv;
	dev_set_drvdata(dev, drm);

	drm_mode_config_init(drm);
	drm->mode_config.min_width = 16;
	drm->mode_config.min_height = 16;
	drm->mode_config.max_width = 4096;
	drm->mode_config.max_height = 4096;
	drm->mode_config.funcs = &zx_drm_mode_config_funcs;

	ret = component_bind_all(dev, drm);
	if (ret) {
		DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
		goto out_unregister;
	}

	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
	if (ret < 0) {
		DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
		goto out_unbind;
	}

	/*
	 * We will manage irq handler on our own.  In this case, irq_enabled
	 * need to be true for using vblank core support.
	 */
	drm->irq_enabled = true;

	drm_mode_config_reset(drm);
	drm_kms_helper_poll_init(drm);

	priv->fbdev = drm_fbdev_cma_init(drm, 32,
					 drm->mode_config.num_connector);
	if (IS_ERR(priv->fbdev)) {
		ret = PTR_ERR(priv->fbdev);
		DRM_DEV_ERROR(dev, "failed to init cma fbdev: %d\n", ret);
		priv->fbdev = NULL;
		goto out_poll_fini;
	}

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

	return 0;

out_fbdev_fini:
	if (priv->fbdev) {
		drm_fbdev_cma_fini(priv->fbdev);
		priv->fbdev = NULL;
	}
out_poll_fini:
	drm_kms_helper_poll_fini(drm);
	drm_mode_config_cleanup(drm);
out_unbind:
	component_unbind_all(dev, drm);
out_unregister:
	dev_set_drvdata(dev, NULL);
	drm->dev_private = NULL;
	drm_dev_unref(drm);
	return ret;
}

static void zx_drm_unbind(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct zx_drm_private *priv = drm->dev_private;

	drm_dev_unregister(drm);
	if (priv->fbdev) {
		drm_fbdev_cma_fini(priv->fbdev);
		priv->fbdev = NULL;
	}
	drm_kms_helper_poll_fini(drm);
	drm_mode_config_cleanup(drm);
	component_unbind_all(dev, drm);
	dev_set_drvdata(dev, NULL);
	drm->dev_private = NULL;
	drm_dev_unref(drm);
}

static const struct component_master_ops zx_drm_master_ops = {
	.bind = zx_drm_bind,
	.unbind = zx_drm_unbind,
};

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

static int zx_drm_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *parent = dev->of_node;
	struct device_node *child;
	struct component_match *match = NULL;
	int ret;

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

	for_each_available_child_of_node(parent, child) {
		component_match_add(dev, &match, compare_of, child);
		of_node_put(child);
	}

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

static int zx_drm_remove(struct platform_device *pdev)
{
	component_master_del(&pdev->dev, &zx_drm_master_ops);
	return 0;
}

static const struct of_device_id zx_drm_of_match[] = {
	{ .compatible = "zte,zx296718-vou", },
	{ /* end */ },
};
MODULE_DEVICE_TABLE(of, zx_drm_of_match);

static struct platform_driver zx_drm_platform_driver = {
	.probe = zx_drm_probe,
	.remove = zx_drm_remove,
	.driver	= {
		.name = "zx-drm",
		.of_match_table	= zx_drm_of_match,
	},
};

static struct platform_driver *drivers[] = {
	&zx_crtc_driver,
	&zx_hdmi_driver,
	&zx_tvenc_driver,
	&zx_vga_driver,
	&zx_drm_platform_driver,
};

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

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

MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
0a886f59 SG	1	/*
	2	* Copyright 2016 Linaro Ltd.
	3	* Copyright 2016 ZTE Corporation.
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License version 2 as
	7	* published by the Free Software Foundation.
	8	*
	9	*/
	10
	11	#include <linux/clk.h>
	12	#include <linux/component.h>
	13	#include <linux/list.h>
	14	#include <linux/module.h>
	15	#include <linux/of_graph.h>
	16	#include <linux/of_platform.h>
	17	#include <linux/spinlock.h>
	18
	19	#include <drm/drm_atomic_helper.h>
	20	#include <drm/drm_crtc.h>
	21	#include <drm/drm_crtc_helper.h>
	22	#include <drm/drm_fb_cma_helper.h>
	23	#include <drm/drm_fb_helper.h>
	24	#include <drm/drm_gem_cma_helper.h>
	25	#include <drm/drm_of.h>
	26	#include <drm/drmP.h>
	27
	28	#include "zx_drm_drv.h"
	29	#include "zx_vou.h"
	30
	31	struct zx_drm_private {
	32	struct drm_fbdev_cma *fbdev;
	33	};
	34
	35	static void zx_drm_fb_output_poll_changed(struct drm_device *drm)
	36	{
	37	struct zx_drm_private *priv = drm->dev_private;
	38
	39	drm_fbdev_cma_hotplug_event(priv->fbdev);
	40	}
	41
	42	static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = {
	43	.fb_create = drm_fb_cma_create,
	44	.output_poll_changed = zx_drm_fb_output_poll_changed,
	45	.atomic_check = drm_atomic_helper_check,
	46	.atomic_commit = drm_atomic_helper_commit,
	47	};
	48
	49	static void zx_drm_lastclose(struct drm_device *drm)
	50	{
	51	struct zx_drm_private *priv = drm->dev_private;
	52
	53	drm_fbdev_cma_restore_mode(priv->fbdev);
	54	}
	55
d55f7e5d	56	DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);
0a886f59 SG	57
	58	static struct drm_driver zx_drm_driver = {
	59	.driver_features = DRIVER_GEM \| DRIVER_MODESET \| DRIVER_PRIME \|
	60	DRIVER_ATOMIC,
	61	.lastclose = zx_drm_lastclose,
98755a51	62	.gem_free_object_unlocked = drm_gem_cma_free_object,
0a886f59 SG	63	.gem_vm_ops = &drm_gem_cma_vm_ops,
	64	.dumb_create = drm_gem_cma_dumb_create,
	65	.dumb_map_offset = drm_gem_cma_dumb_map_offset,
	66	.dumb_destroy = drm_gem_dumb_destroy,
	67	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	68	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	69	.gem_prime_export = drm_gem_prime_export,
	70	.gem_prime_import = drm_gem_prime_import,
	71	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	72	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	73	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	74	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	75	.gem_prime_mmap = drm_gem_cma_prime_mmap,
	76	.fops = &zx_drm_fops,
	77	.name = "zx-vou",
	78	.desc = "ZTE VOU Controller DRM",
	79	.date = "20160811",
	80	.major = 1,
	81	.minor = 0,
	82	};
	83
	84	static int zx_drm_bind(struct device *dev)
	85	{
	86	struct drm_device *drm;
	87	struct zx_drm_private *priv;
	88	int ret;
	89
	90	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	91	if (!priv)
	92	return -ENOMEM;
	93
	94	drm = drm_dev_alloc(&zx_drm_driver, dev);
72282a88 DC	95	if (IS_ERR(drm))
72282a88 DC	96	return PTR_ERR(drm);
0a886f59 SG	97
	98	drm->dev_private = priv;
	99	dev_set_drvdata(dev, drm);
	100
	101	drm_mode_config_init(drm);
	102	drm->mode_config.min_width = 16;
	103	drm->mode_config.min_height = 16;
	104	drm->mode_config.max_width = 4096;
	105	drm->mode_config.max_height = 4096;
	106	drm->mode_config.funcs = &zx_drm_mode_config_funcs;
	107
	108	ret = component_bind_all(dev, drm);
	109	if (ret) {
	110	DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
	111	goto out_unregister;
	112	}
	113
	114	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
	115	if (ret < 0) {
	116	DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
	117	goto out_unbind;
	118	}
	119
	120	/*
	121	* We will manage irq handler on our own. In this case, irq_enabled
	122	* need to be true for using vblank core support.
	123	*/
	124	drm->irq_enabled = true;
	125
	126	drm_mode_config_reset(drm);
	127	drm_kms_helper_poll_init(drm);
	128
e4563f6b	129	priv->fbdev = drm_fbdev_cma_init(drm, 32,
0a886f59 SG	130	drm->mode_config.num_connector);
	131	if (IS_ERR(priv->fbdev)) {
	132	ret = PTR_ERR(priv->fbdev);
	133	DRM_DEV_ERROR(dev, "failed to init cma fbdev: %d\n", ret);
	134	priv->fbdev = NULL;
	135	goto out_poll_fini;
	136	}
	137
	138	ret = drm_dev_register(drm, 0);
	139	if (ret)
	140	goto out_fbdev_fini;
	141
	142	return 0;
	143
	144	out_fbdev_fini:
	145	if (priv->fbdev) {
	146	drm_fbdev_cma_fini(priv->fbdev);
	147	priv->fbdev = NULL;
	148	}
	149	out_poll_fini:
	150	drm_kms_helper_poll_fini(drm);
	151	drm_mode_config_cleanup(drm);
0a886f59 SG	152	out_unbind:
	153	component_unbind_all(dev, drm);
	154	out_unregister:
	155	dev_set_drvdata(dev, NULL);
	156	drm->dev_private = NULL;
	157	drm_dev_unref(drm);
	158	return ret;
	159	}
	160
	161	static void zx_drm_unbind(struct device *dev)
	162	{
	163	struct drm_device *drm = dev_get_drvdata(dev);
	164	struct zx_drm_private *priv = drm->dev_private;
	165
	166	drm_dev_unregister(drm);
	167	if (priv->fbdev) {
	168	drm_fbdev_cma_fini(priv->fbdev);
	169	priv->fbdev = NULL;
	170	}
	171	drm_kms_helper_poll_fini(drm);
	172	drm_mode_config_cleanup(drm);
0a886f59 SG	173	component_unbind_all(dev, drm);
	174	dev_set_drvdata(dev, NULL);
	175	drm->dev_private = NULL;
	176	drm_dev_unref(drm);
	177	}
	178
	179	static const struct component_master_ops zx_drm_master_ops = {
	180	.bind = zx_drm_bind,
	181	.unbind = zx_drm_unbind,
	182	};
	183
	184	static int compare_of(struct device dev, void data)
	185	{
	186	return dev->of_node == data;
	187	}
	188
	189	static int zx_drm_probe(struct platform_device *pdev)
	190	{
	191	struct device *dev = &pdev->dev;
	192	struct device_node *parent = dev->of_node;
	193	struct device_node *child;
	194	struct component_match *match = NULL;
	195	int ret;
	196
f3ca01d3	197	ret = devm_of_platform_populate(dev);
0a886f59 SG	198	if (ret)
	199	return ret;
	200
	201	for_each_available_child_of_node(parent, child) {
	202	component_match_add(dev, &match, compare_of, child);
	203	of_node_put(child);
	204	}
	205
	206	return component_master_add_with_match(dev, &zx_drm_master_ops, match);
	207	}
	208
	209	static int zx_drm_remove(struct platform_device *pdev)
	210	{
	211	component_master_del(&pdev->dev, &zx_drm_master_ops);
	212	return 0;
	213	}
	214
	215	static const struct of_device_id zx_drm_of_match[] = {
	216	{ .compatible = "zte,zx296718-vou", },
	217	{ /* end */ },
	218	};
	219	MODULE_DEVICE_TABLE(of, zx_drm_of_match);
	220
	221	static struct platform_driver zx_drm_platform_driver = {
	222	.probe = zx_drm_probe,
	223	.remove = zx_drm_remove,
	224	.driver = {
	225	.name = "zx-drm",
	226	.of_match_table = zx_drm_of_match,
	227	},
	228	};
	229
	230	static struct platform_driver *drivers[] = {
	231	&zx_crtc_driver,
	232	&zx_hdmi_driver,
098988cb	233	&zx_tvenc_driver,
6911498d	234	&zx_vga_driver,
0a886f59 SG	235	&zx_drm_platform_driver,
	236	};
	237
	238	static int zx_drm_init(void)
	239	{
	240	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
	241	}
	242	module_init(zx_drm_init);
	243
	244	static void zx_drm_exit(void)
	245	{
	246	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
	247	}
	248	module_exit(zx_drm_exit);
	249
	250	MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
	251	MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
	252	MODULE_LICENSE("GPL v2");