[deliverable/linux.git] / drivers / gpu / drm / fsl-dcu / fsl_dcu_drm_drv.c

/*
 * Copyright 2015 Freescale Semiconductor, Inc.
 *
 * Freescale DCU drm device driver
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>

#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_cma_helper.h>

#include "fsl_dcu_drm_crtc.h"
#include "fsl_dcu_drm_drv.h"

static const struct regmap_config fsl_dcu_regmap_config = {
	.reg_bits = 32,
	.reg_stride = 4,
	.val_bits = 32,
	.cache_type = REGCACHE_RBTREE,
};

static int fsl_dcu_drm_irq_init(struct drm_device *dev)
{
	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
	unsigned int value;
	int ret;

	ret = drm_irq_install(dev, fsl_dev->irq);
	if (ret < 0)
		dev_err(dev->dev, "failed to install IRQ handler\n");

	ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
	if (ret)
		dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
	ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
	if (ret)
		dev_err(dev->dev, "read DCU_INT_MASK failed\n");
	value &= DCU_INT_MASK_VBLANK;
	ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
	if (ret)
		dev_err(dev->dev, "set DCU_INT_MASK failed\n");
	ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
			   DCU_UPDATE_MODE_READREG);
	if (ret)
		dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n");

	return ret;
}

static int fsl_dcu_load(struct drm_device *drm, unsigned long flags)
{
	struct device *dev = drm->dev;
	struct fsl_dcu_drm_device *fsl_dev = drm->dev_private;
	int ret;

	ret = fsl_dcu_drm_modeset_init(fsl_dev);
	if (ret < 0) {
		dev_err(dev, "failed to initialize mode setting\n");
		return ret;
	}

	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
	if (ret < 0) {
		dev_err(dev, "failed to initialize vblank\n");
		goto done;
	}
	drm->vblank_disable_allowed = true;

	ret = fsl_dcu_drm_irq_init(drm);
	if (ret < 0)
		goto done;
	drm->irq_enabled = true;

	fsl_dcu_fbdev_init(drm);

	return 0;
done:
	if (ret) {
		drm_mode_config_cleanup(drm);
		drm_vblank_cleanup(drm);
		drm_irq_uninstall(drm);
		drm->dev_private = NULL;
	}

	return ret;
}

static int fsl_dcu_unload(struct drm_device *dev)
{
	drm_mode_config_cleanup(dev);
	drm_vblank_cleanup(dev);
	drm_irq_uninstall(dev);

	dev->dev_private = NULL;

	return 0;
}

static void fsl_dcu_drm_preclose(struct drm_device *dev, struct drm_file *file)
{
}

static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
{
	struct drm_device *dev = arg;
	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
	unsigned int int_status;
	int ret;

	ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
	if (ret)
		dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
	if (int_status & DCU_INT_STATUS_VBLANK)
		drm_handle_vblank(dev, 0);

	ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0xffffffff);
	if (ret)
		dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
	ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
			   DCU_UPDATE_MODE_READREG);
	if (ret)
		dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n");

	return IRQ_HANDLED;
}

static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
{
	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
	unsigned int value;
	int ret;

	ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
	if (ret)
		dev_err(dev->dev, "read DCU_INT_MASK failed\n");
	value &= ~DCU_INT_MASK_VBLANK;
	ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
	if (ret)
		dev_err(dev->dev, "set DCU_INT_MASK failed\n");
	return 0;
}

static void fsl_dcu_drm_disable_vblank(struct drm_device *dev,
				       unsigned int pipe)
{
	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
	unsigned int value;
	int ret;

	ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
	if (ret)
		dev_err(dev->dev, "read DCU_INT_MASK failed\n");
	value |= DCU_INT_MASK_VBLANK;
	ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
	if (ret)
		dev_err(dev->dev, "set DCU_INT_MASK failed\n");
}

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

static struct drm_driver fsl_dcu_drm_driver = {
	.driver_features	= DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
				| DRIVER_PRIME | DRIVER_ATOMIC,
	.load			= fsl_dcu_load,
	.unload			= fsl_dcu_unload,
	.preclose		= fsl_dcu_drm_preclose,
	.irq_handler		= fsl_dcu_drm_irq,
	.get_vblank_counter	= drm_vblank_no_hw_counter,
	.enable_vblank		= fsl_dcu_drm_enable_vblank,
	.disable_vblank		= fsl_dcu_drm_disable_vblank,
	.gem_free_object	= drm_gem_cma_free_object,
	.gem_vm_ops		= &drm_gem_cma_vm_ops,
	.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	= 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,
	.dumb_create		= drm_gem_cma_dumb_create,
	.dumb_map_offset	= drm_gem_cma_dumb_map_offset,
	.dumb_destroy		= drm_gem_dumb_destroy,
	.fops			= &fsl_dcu_drm_fops,
	.name			= "fsl-dcu-drm",
	.desc			= "Freescale DCU DRM",
	.date			= "20150213",
	.major			= 1,
	.minor			= 0,
};

#ifdef CONFIG_PM_SLEEP
static int fsl_dcu_drm_pm_suspend(struct device *dev)
{
	struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);

	if (!fsl_dev)
		return 0;

	drm_kms_helper_poll_disable(fsl_dev->drm);
	regcache_cache_only(fsl_dev->regmap, true);
	regcache_mark_dirty(fsl_dev->regmap);
	clk_disable(fsl_dev->clk);
	clk_unprepare(fsl_dev->clk);

	return 0;
}

static int fsl_dcu_drm_pm_resume(struct device *dev)
{
	struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
	int ret;

	if (!fsl_dev)
		return 0;

	ret = clk_enable(fsl_dev->clk);
	if (ret < 0) {
		dev_err(dev, "failed to enable dcu clk\n");
		clk_unprepare(fsl_dev->clk);
		return ret;
	}
	ret = clk_prepare(fsl_dev->clk);
	if (ret < 0) {
		dev_err(dev, "failed to prepare dcu clk\n");
		return ret;
	}

	drm_kms_helper_poll_enable(fsl_dev->drm);
	regcache_cache_only(fsl_dev->regmap, false);
	regcache_sync(fsl_dev->regmap);

	return 0;
}
#endif

static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
};

static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
	.name = "ls1021a",
	.total_layer = 16,
	.max_layer = 4,
};

static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
	.name = "vf610",
	.total_layer = 64,
	.max_layer = 6,
};

static const struct of_device_id fsl_dcu_of_match[] = {
	{
		.compatible = "fsl,ls1021a-dcu",
		.data = &fsl_dcu_ls1021a_data,
	}, {
		.compatible = "fsl,vf610-dcu",
		.data = &fsl_dcu_vf610_data,
	}, {
	},
};
MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);

static int fsl_dcu_drm_probe(struct platform_device *pdev)
{
	struct fsl_dcu_drm_device *fsl_dev;
	struct drm_device *drm;
	struct device *dev = &pdev->dev;
	struct resource *res;
	void __iomem *base;
	struct drm_driver *driver = &fsl_dcu_drm_driver;
	const struct of_device_id *id;
	int ret;

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

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(dev, "could not get memory IO resource\n");
		return -ENODEV;
	}

	base = devm_ioremap_resource(dev, res);
	if (IS_ERR(base)) {
		ret = PTR_ERR(base);
		return ret;
	}

	fsl_dev->irq = platform_get_irq(pdev, 0);
	if (fsl_dev->irq < 0) {
		dev_err(dev, "failed to get irq\n");
		return -ENXIO;
	}

	fsl_dev->clk = devm_clk_get(dev, "dcu");
	if (IS_ERR(fsl_dev->clk)) {
		ret = PTR_ERR(fsl_dev->clk);
		dev_err(dev, "failed to get dcu clock\n");
		return ret;
	}
	ret = clk_prepare(fsl_dev->clk);
	if (ret < 0) {
		dev_err(dev, "failed to prepare dcu clk\n");
		return ret;
	}
	ret = clk_enable(fsl_dev->clk);
	if (ret < 0) {
		dev_err(dev, "failed to enable dcu clk\n");
		clk_unprepare(fsl_dev->clk);
		return ret;
	}

	fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
			&fsl_dcu_regmap_config);
	if (IS_ERR(fsl_dev->regmap)) {
		dev_err(dev, "regmap init failed\n");
		return PTR_ERR(fsl_dev->regmap);
	}

	id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
	if (!id)
		return -ENODEV;
	fsl_dev->soc = id->data;

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

	fsl_dev->dev = dev;
	fsl_dev->drm = drm;
	fsl_dev->np = dev->of_node;
	drm->dev_private = fsl_dev;
	dev_set_drvdata(dev, fsl_dev);

	ret = drm_dev_register(drm, 0);
	if (ret < 0)
		goto unref;

	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
		 driver->major, driver->minor, driver->patchlevel,
		 driver->date, drm->primary->index);

	return 0;

unref:
	drm_dev_unref(drm);
	return ret;
}

static int fsl_dcu_drm_remove(struct platform_device *pdev)
{
	struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);

	drm_put_dev(fsl_dev->drm);

	return 0;
}

static struct platform_driver fsl_dcu_drm_platform_driver = {
	.probe		= fsl_dcu_drm_probe,
	.remove		= fsl_dcu_drm_remove,
	.driver		= {
		.name	= "fsl-dcu",
		.pm	= &fsl_dcu_drm_pm_ops,
		.of_match_table = fsl_dcu_of_match,
	},
};

module_platform_driver(fsl_dcu_drm_platform_driver);

MODULE_DESCRIPTION("Freescale DCU DRM Driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
109eee2f JW	1	/*
	2	* Copyright 2015 Freescale Semiconductor, Inc.
	3	*
	4	* Freescale DCU drm device driver
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*/
	11
	12	#include <linux/clk.h>
	13	#include <linux/clk-provider.h>
	14	#include <linux/io.h>
	15	#include <linux/mfd/syscon.h>
	16	#include <linux/mm.h>
	17	#include <linux/module.h>
	18	#include <linux/of_platform.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/pm.h>
	21	#include <linux/pm_runtime.h>
	22	#include <linux/regmap.h>
	23
	24	#include <drm/drmP.h>
	25	#include <drm/drm_crtc_helper.h>
	26	#include <drm/drm_gem_cma_helper.h>
	27
	28	#include "fsl_dcu_drm_crtc.h"
	29	#include "fsl_dcu_drm_drv.h"
	30
	31	static const struct regmap_config fsl_dcu_regmap_config = {
	32	.reg_bits = 32,
	33	.reg_stride = 4,
	34	.val_bits = 32,
	35	.cache_type = REGCACHE_RBTREE,
	36	};
	37
	38	static int fsl_dcu_drm_irq_init(struct drm_device *dev)
	39	{
	40	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
	41	unsigned int value;
	42	int ret;
	43
	44	ret = drm_irq_install(dev, fsl_dev->irq);
	45	if (ret < 0)
	46	dev_err(dev->dev, "failed to install IRQ handler\n");
	47
	48	ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
	49	if (ret)
	50	dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
	51	ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
	52	if (ret)
	53	dev_err(dev->dev, "read DCU_INT_MASK failed\n");
	54	value &= DCU_INT_MASK_VBLANK;
	55	ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
	56	if (ret)
	57	dev_err(dev->dev, "set DCU_INT_MASK failed\n");
	58	ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
	59	DCU_UPDATE_MODE_READREG);
	60	if (ret)
	61	dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n");
	62
	63	return ret;
	64	}
65
66	static int fsl_dcu_load(struct drm_device *drm, unsigned long flags)
67	{
68	struct device *dev = drm->dev;
69	struct fsl_dcu_drm_device *fsl_dev = drm->dev_private;
70	int ret;
71
72	ret = fsl_dcu_drm_modeset_init(fsl_dev);
73	if (ret < 0) {
74	dev_err(dev, "failed to initialize mode setting\n");
75	return ret;
76	}
77
78	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
79	if (ret < 0) {
80	dev_err(dev, "failed to initialize vblank\n");
81	goto done;
82	}
83	drm->vblank_disable_allowed = true;
84
85	ret = fsl_dcu_drm_irq_init(drm);
86	if (ret < 0)
87	goto done;
88	drm->irq_enabled = true;
89
90	fsl_dcu_fbdev_init(drm);
91
92	return 0;
93	done:
94	if (ret) {
95	drm_mode_config_cleanup(drm);
96	drm_vblank_cleanup(drm);
97	drm_irq_uninstall(drm);
98	drm->dev_private = NULL;
99	}
100
101	return ret;
102	}
103
104	static int fsl_dcu_unload(struct drm_device *dev)
105	{
106	drm_mode_config_cleanup(dev);
107	drm_vblank_cleanup(dev);
108	drm_irq_uninstall(dev);
109
110	dev->dev_private = NULL;
111
112	return 0;
113	}
114
115	static void fsl_dcu_drm_preclose(struct drm_device dev, struct drm_file file)
116	{
117	}
118
119	static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
120	{
121	struct drm_device *dev = arg;
122	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
123	unsigned int int_status;
124	int ret;
125
126	ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
127	if (ret)
128	dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
129	if (int_status & DCU_INT_STATUS_VBLANK)
130	drm_handle_vblank(dev, 0);
131
132	ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0xffffffff);
133	if (ret)
134	dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
135	ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
136	DCU_UPDATE_MODE_READREG);
137	if (ret)
138	dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n");
139
140	return IRQ_HANDLED;
141	}
142
88e72717	143	static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
109eee2f JW	144	{
	145	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
	146	unsigned int value;
	147	int ret;
	148
	149	ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
	150	if (ret)
	151	dev_err(dev->dev, "read DCU_INT_MASK failed\n");
	152	value &= ~DCU_INT_MASK_VBLANK;
	153	ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
	154	if (ret)
	155	dev_err(dev->dev, "set DCU_INT_MASK failed\n");
	156	return 0;
	157	}
	158
88e72717 TR	159	static void fsl_dcu_drm_disable_vblank(struct drm_device *dev,
88e72717 TR	160	unsigned int pipe)
109eee2f JW	161	{
	162	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
	163	unsigned int value;
	164	int ret;
	165
	166	ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
	167	if (ret)
	168	dev_err(dev->dev, "read DCU_INT_MASK failed\n");
	169	value \|= DCU_INT_MASK_VBLANK;
	170	ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
	171	if (ret)
	172	dev_err(dev->dev, "set DCU_INT_MASK failed\n");
	173	}
	174
	175	static const struct file_operations fsl_dcu_drm_fops = {
	176	.owner = THIS_MODULE,
	177	.open = drm_open,
	178	.release = drm_release,
	179	.unlocked_ioctl = drm_ioctl,
	180	#ifdef CONFIG_COMPAT
	181	.compat_ioctl = drm_compat_ioctl,
	182	#endif
	183	.poll = drm_poll,
	184	.read = drm_read,
	185	.llseek = no_llseek,
	186	.mmap = drm_gem_cma_mmap,
	187	};
	188
	189	static struct drm_driver fsl_dcu_drm_driver = {
	190	.driver_features = DRIVER_HAVE_IRQ \| DRIVER_GEM \| DRIVER_MODESET
	191	\| DRIVER_PRIME \| DRIVER_ATOMIC,
	192	.load = fsl_dcu_load,
	193	.unload = fsl_dcu_unload,
	194	.preclose = fsl_dcu_drm_preclose,
	195	.irq_handler = fsl_dcu_drm_irq,
b44f8408	196	.get_vblank_counter = drm_vblank_no_hw_counter,
109eee2f JW	197	.enable_vblank = fsl_dcu_drm_enable_vblank,
	198	.disable_vblank = fsl_dcu_drm_disable_vblank,
	199	.gem_free_object = drm_gem_cma_free_object,
	200	.gem_vm_ops = &drm_gem_cma_vm_ops,
	201	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	202	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	203	.gem_prime_import = drm_gem_prime_import,
	204	.gem_prime_export = drm_gem_prime_export,
	205	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	206	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	207	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	208	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	209	.gem_prime_mmap = drm_gem_cma_prime_mmap,
	210	.dumb_create = drm_gem_cma_dumb_create,
	211	.dumb_map_offset = drm_gem_cma_dumb_map_offset,
	212	.dumb_destroy = drm_gem_dumb_destroy,
	213	.fops = &fsl_dcu_drm_fops,
	214	.name = "fsl-dcu-drm",
	215	.desc = "Freescale DCU DRM",
	216	.date = "20150213",
	217	.major = 1,
	218	.minor = 0,
	219	};
	220
	221	#ifdef CONFIG_PM_SLEEP
	222	static int fsl_dcu_drm_pm_suspend(struct device *dev)
	223	{
	224	struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
	225
	226	if (!fsl_dev)
	227	return 0;
	228
	229	drm_kms_helper_poll_disable(fsl_dev->drm);
	230	regcache_cache_only(fsl_dev->regmap, true);
	231	regcache_mark_dirty(fsl_dev->regmap);
	232	clk_disable(fsl_dev->clk);
	233	clk_unprepare(fsl_dev->clk);
	234
	235	return 0;
	236	}
	237
	238	static int fsl_dcu_drm_pm_resume(struct device *dev)
	239	{
	240	struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
	241	int ret;
	242
	243	if (!fsl_dev)
	244	return 0;
	245
	246	ret = clk_enable(fsl_dev->clk);
	247	if (ret < 0) {
	248	dev_err(dev, "failed to enable dcu clk\n");
	249	clk_unprepare(fsl_dev->clk);
	250	return ret;
	251	}
	252	ret = clk_prepare(fsl_dev->clk);
	253	if (ret < 0) {
	254	dev_err(dev, "failed to prepare dcu clk\n");
	255	return ret;
	256	}
	257
	258	drm_kms_helper_poll_enable(fsl_dev->drm);
	259	regcache_cache_only(fsl_dev->regmap, false);
	260	regcache_sync(fsl_dev->regmap);
261
262	return 0;
263	}
264	#endif
265
266	static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
267	SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
268	};
269
270	static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
271	.name = "ls1021a",
272	.total_layer = 16,
273	.max_layer = 4,
274	};
275
276	static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
277	.name = "vf610",
278	.total_layer = 64,
279	.max_layer = 6,
280	};
281
282	static const struct of_device_id fsl_dcu_of_match[] = {
283	{
284	.compatible = "fsl,ls1021a-dcu",
285	.data = &fsl_dcu_ls1021a_data,
286	}, {
287	.compatible = "fsl,vf610-dcu",
288	.data = &fsl_dcu_vf610_data,
289	}, {
290	},
291	};
292	MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
293
294	static int fsl_dcu_drm_probe(struct platform_device *pdev)
295	{
296	struct fsl_dcu_drm_device *fsl_dev;
297	struct drm_device *drm;
298	struct device *dev = &pdev->dev;
299	struct resource *res;
300	void __iomem *base;
301	struct drm_driver *driver = &fsl_dcu_drm_driver;
302	const struct of_device_id *id;
303	int ret;
304
305	fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
306	if (!fsl_dev)
307	return -ENOMEM;
308
309	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
310	if (!res) {
311	dev_err(dev, "could not get memory IO resource\n");
312	return -ENODEV;
313	}
314
315	base = devm_ioremap_resource(dev, res);
316	if (IS_ERR(base)) {
317	ret = PTR_ERR(base);
318	return ret;
319	}
320
321	fsl_dev->irq = platform_get_irq(pdev, 0);
322	if (fsl_dev->irq < 0) {
323	dev_err(dev, "failed to get irq\n");
324	return -ENXIO;
325	}
326
327	fsl_dev->clk = devm_clk_get(dev, "dcu");
328	if (IS_ERR(fsl_dev->clk)) {
329	ret = PTR_ERR(fsl_dev->clk);
330	dev_err(dev, "failed to get dcu clock\n");
331	return ret;
332	}
333	ret = clk_prepare(fsl_dev->clk);
334	if (ret < 0) {
335	dev_err(dev, "failed to prepare dcu clk\n");
336	return ret;
337	}
338	ret = clk_enable(fsl_dev->clk);
339	if (ret < 0) {
340	dev_err(dev, "failed to enable dcu clk\n");
341	clk_unprepare(fsl_dev->clk);
342	return ret;
343	}
344
345	fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
346	&fsl_dcu_regmap_config);
347	if (IS_ERR(fsl_dev->regmap)) {
348	dev_err(dev, "regmap init failed\n");
349	return PTR_ERR(fsl_dev->regmap);
350	}
351
352	id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
353	if (!id)
354	return -ENODEV;
355	fsl_dev->soc = id->data;
356
357	drm = drm_dev_alloc(driver, dev);
358	if (!drm)
359	return -ENOMEM;
360
361	fsl_dev->dev = dev;
362	fsl_dev->drm = drm;
363	fsl_dev->np = dev->of_node;
364	drm->dev_private = fsl_dev;
365	dev_set_drvdata(dev, fsl_dev);
109eee2f JW	366
	367	ret = drm_dev_register(drm, 0);
	368	if (ret < 0)
	369	goto unref;
	370
	371	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
	372	driver->major, driver->minor, driver->patchlevel,
	373	driver->date, drm->primary->index);
	374
	375	return 0;
	376
	377	unref:
	378	drm_dev_unref(drm);
	379	return ret;
	380	}
	381
	382	static int fsl_dcu_drm_remove(struct platform_device *pdev)
	383	{
	384	struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
	385
	386	drm_put_dev(fsl_dev->drm);
	387
	388	return 0;
	389	}
	390
	391	static struct platform_driver fsl_dcu_drm_platform_driver = {
	392	.probe = fsl_dcu_drm_probe,
	393	.remove = fsl_dcu_drm_remove,
	394	.driver = {
	395	.name = "fsl-dcu",
	396	.pm = &fsl_dcu_drm_pm_ops,
	397	.of_match_table = fsl_dcu_of_match,
	398	},
	399	};
	400
	401	module_platform_driver(fsl_dcu_drm_platform_driver);
	402
	403	MODULE_DESCRIPTION("Freescale DCU DRM Driver");
	404	MODULE_LICENSE("GPL");