[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"
#include "fsl_tcon.h"

static bool fsl_dcu_drm_is_volatile_reg(struct device *dev, unsigned int reg)
{
	if (reg == DCU_INT_STATUS || reg == DCU_UPDATE_MODE)
		return true;

	return false;
}

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

	.volatile_reg = fsl_dcu_drm_is_volatile_reg,
};

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

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

	regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
	regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
	regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
		     DCU_UPDATE_MODE_READREG);

	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 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, "read DCU_INT_STATUS failed\n");
		return IRQ_NONE;
	}

	if (int_status & DCU_INT_STATUS_VBLANK)
		drm_handle_vblank(dev, 0);

	regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
	regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
		     DCU_UPDATE_MODE_READREG);

	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;

	regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
	value &= ~DCU_INT_MASK_VBLANK;
	regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);

	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;

	regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
	value |= DCU_INT_MASK_VBLANK;
	regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
}

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,
	.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;
	struct clk *pix_clk_in;
	char pix_clk_name[32];
	const char *pix_clk_in_name;
	const struct of_device_id *id;
	int ret;

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

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

	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->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);
	}

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

	pix_clk_in = devm_clk_get(dev, "pix");
	if (IS_ERR(pix_clk_in)) {
		/* legancy binding, use dcu clock as pixel clock input */
		pix_clk_in = fsl_dev->clk;
	}

	pix_clk_in_name = __clk_get_name(pix_clk_in);
	snprintf(pix_clk_name, sizeof(pix_clk_name), "%s_pix", pix_clk_in_name);
	fsl_dev->pix_clk = clk_register_divider(dev, pix_clk_name,
			pix_clk_in_name, 0, base + DCU_DIV_RATIO,
			0, 8, CLK_DIVIDER_ROUND_CLOSEST, NULL);
	if (IS_ERR(fsl_dev->pix_clk)) {
		dev_err(dev, "failed to register pix clk\n");
		ret = PTR_ERR(fsl_dev->pix_clk);
		goto disable_clk;
	}

	ret = clk_prepare_enable(fsl_dev->pix_clk);
	if (ret < 0) {
		dev_err(dev, "failed to enable pix clk\n");
		goto unregister_pix_clk;
	}

	fsl_dev->tcon = fsl_tcon_init(dev);

	drm = drm_dev_alloc(driver, dev);
	if (!drm) {
		ret = -ENOMEM;
		goto disable_pix_clk;
	}

	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);
disable_pix_clk:
	clk_disable_unprepare(fsl_dev->pix_clk);
unregister_pix_clk:
	clk_unregister(fsl_dev->pix_clk);
disable_clk:
	clk_disable_unprepare(fsl_dev->clk);
	return ret;
}

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

	clk_disable_unprepare(fsl_dev->clk);
	clk_disable_unprepare(fsl_dev->pix_clk);
	clk_unregister(fsl_dev->pix_clk);
	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"
fb127b79	30	#include "fsl_tcon.h"
109eee2f	31
efb8b491 SA	32	static bool fsl_dcu_drm_is_volatile_reg(struct device *dev, unsigned int reg)
	33	{
	34	if (reg == DCU_INT_STATUS \|\| reg == DCU_UPDATE_MODE)
	35	return true;
	36
	37	return false;
	38	}
	39
109eee2f JW	40	static const struct regmap_config fsl_dcu_regmap_config = {
	41	.reg_bits = 32,
	42	.reg_stride = 4,
	43	.val_bits = 32,
	44	.cache_type = REGCACHE_RBTREE,
efb8b491 SA	45
efb8b491 SA	46	.volatile_reg = fsl_dcu_drm_is_volatile_reg,
109eee2f JW	47	};
	48
	49	static int fsl_dcu_drm_irq_init(struct drm_device *dev)
	50	{
	51	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
109eee2f JW	52	int ret;
	53
	54	ret = drm_irq_install(dev, fsl_dev->irq);
	55	if (ret < 0)
	56	dev_err(dev->dev, "failed to install IRQ handler\n");
	57
e291d298	58	regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
638c93f6	59	regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
e291d298 SA	60	regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
e291d298 SA	61	DCU_UPDATE_MODE_READREG);
109eee2f JW	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
109eee2f JW	115	static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
	116	{
	117	struct drm_device *dev = arg;
	118	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
	119	unsigned int int_status;
	120	int ret;
	121
	122	ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
e291d298 SA	123	if (ret) {
	124	dev_err(dev->dev, "read DCU_INT_STATUS failed\n");
	125	return IRQ_NONE;
	126	}
	127
109eee2f JW	128	if (int_status & DCU_INT_STATUS_VBLANK)
	129	drm_handle_vblank(dev, 0);
	130
e291d298 SA	131	regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
	132	regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
	133	DCU_UPDATE_MODE_READREG);
109eee2f JW	134
	135	return IRQ_HANDLED;
	136	}
	137
88e72717	138	static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
109eee2f JW	139	{
	140	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
	141	unsigned int value;
109eee2f	142
e291d298	143	regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
109eee2f	144	value &= ~DCU_INT_MASK_VBLANK;
e291d298 SA	145	regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
e291d298 SA	146
109eee2f JW	147	return 0;
	148	}
	149
88e72717 TR	150	static void fsl_dcu_drm_disable_vblank(struct drm_device *dev,
88e72717 TR	151	unsigned int pipe)
109eee2f JW	152	{
	153	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
	154	unsigned int value;
109eee2f	155
e291d298	156	regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
109eee2f	157	value \|= DCU_INT_MASK_VBLANK;
e291d298	158	regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
109eee2f JW	159	}
	160
	161	static const struct file_operations fsl_dcu_drm_fops = {
	162	.owner = THIS_MODULE,
	163	.open = drm_open,
	164	.release = drm_release,
	165	.unlocked_ioctl = drm_ioctl,
	166	#ifdef CONFIG_COMPAT
	167	.compat_ioctl = drm_compat_ioctl,
	168	#endif
	169	.poll = drm_poll,
	170	.read = drm_read,
	171	.llseek = no_llseek,
	172	.mmap = drm_gem_cma_mmap,
	173	};
	174
	175	static struct drm_driver fsl_dcu_drm_driver = {
	176	.driver_features = DRIVER_HAVE_IRQ \| DRIVER_GEM \| DRIVER_MODESET
	177	\| DRIVER_PRIME \| DRIVER_ATOMIC,
	178	.load = fsl_dcu_load,
	179	.unload = fsl_dcu_unload,
109eee2f	180	.irq_handler = fsl_dcu_drm_irq,
b44f8408	181	.get_vblank_counter = drm_vblank_no_hw_counter,
109eee2f JW	182	.enable_vblank = fsl_dcu_drm_enable_vblank,
	183	.disable_vblank = fsl_dcu_drm_disable_vblank,
	184	.gem_free_object = drm_gem_cma_free_object,
	185	.gem_vm_ops = &drm_gem_cma_vm_ops,
	186	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	187	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	188	.gem_prime_import = drm_gem_prime_import,
	189	.gem_prime_export = drm_gem_prime_export,
	190	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	191	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	192	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	193	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	194	.gem_prime_mmap = drm_gem_cma_prime_mmap,
	195	.dumb_create = drm_gem_cma_dumb_create,
	196	.dumb_map_offset = drm_gem_cma_dumb_map_offset,
	197	.dumb_destroy = drm_gem_dumb_destroy,
	198	.fops = &fsl_dcu_drm_fops,
	199	.name = "fsl-dcu-drm",
	200	.desc = "Freescale DCU DRM",
	201	.date = "20150213",
	202	.major = 1,
	203	.minor = 0,
	204	};
	205
	206	#ifdef CONFIG_PM_SLEEP
	207	static int fsl_dcu_drm_pm_suspend(struct device *dev)
	208	{
	209	struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
	210
	211	if (!fsl_dev)
	212	return 0;
	213
	214	drm_kms_helper_poll_disable(fsl_dev->drm);
	215	regcache_cache_only(fsl_dev->regmap, true);
	216	regcache_mark_dirty(fsl_dev->regmap);
	217	clk_disable(fsl_dev->clk);
	218	clk_unprepare(fsl_dev->clk);
	219
	220	return 0;
	221	}
	222
	223	static int fsl_dcu_drm_pm_resume(struct device *dev)
	224	{
	225	struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
	226	int ret;
	227
	228	if (!fsl_dev)
	229	return 0;
	230
	231	ret = clk_enable(fsl_dev->clk);
	232	if (ret < 0) {
	233	dev_err(dev, "failed to enable dcu clk\n");
	234	clk_unprepare(fsl_dev->clk);
	235	return ret;
	236	}
	237	ret = clk_prepare(fsl_dev->clk);
	238	if (ret < 0) {
	239	dev_err(dev, "failed to prepare dcu clk\n");
	240	return ret;
	241	}
	242
	243	drm_kms_helper_poll_enable(fsl_dev->drm);
	244	regcache_cache_only(fsl_dev->regmap, false);
	245	regcache_sync(fsl_dev->regmap);
246
247	return 0;
248	}
249	#endif
250
251	static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
252	SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
253	};
254
255	static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
256	.name = "ls1021a",
257	.total_layer = 16,
258	.max_layer = 4,
259	};
260
261	static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
262	.name = "vf610",
263	.total_layer = 64,
264	.max_layer = 6,
265	};
266
267	static const struct of_device_id fsl_dcu_of_match[] = {
268	{
269	.compatible = "fsl,ls1021a-dcu",
270	.data = &fsl_dcu_ls1021a_data,
271	}, {
272	.compatible = "fsl,vf610-dcu",
273	.data = &fsl_dcu_vf610_data,
274	}, {
275	},
276	};
277	MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
278
279	static int fsl_dcu_drm_probe(struct platform_device *pdev)
280	{
281	struct fsl_dcu_drm_device *fsl_dev;
282	struct drm_device *drm;
283	struct device *dev = &pdev->dev;
284	struct resource *res;
285	void __iomem *base;
286	struct drm_driver *driver = &fsl_dcu_drm_driver;
2d701449 SA	287	struct clk *pix_clk_in;
	288	char pix_clk_name[32];
	289	const char *pix_clk_in_name;
109eee2f JW	290	const struct of_device_id *id;
	291	int ret;
	292
	293	fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
	294	if (!fsl_dev)
	295	return -ENOMEM;
	296
73fa3033 SA	297	id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
	298	if (!id)
	299	return -ENODEV;
	300	fsl_dev->soc = id->data;
	301
109eee2f JW	302	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	303	if (!res) {
	304	dev_err(dev, "could not get memory IO resource\n");
	305	return -ENODEV;
	306	}
	307
	308	base = devm_ioremap_resource(dev, res);
	309	if (IS_ERR(base)) {
	310	ret = PTR_ERR(base);
	311	return ret;
	312	}
	313
	314	fsl_dev->irq = platform_get_irq(pdev, 0);
	315	if (fsl_dev->irq < 0) {
	316	dev_err(dev, "failed to get irq\n");
	317	return -ENXIO;
	318	}
	319
73fa3033 SA	320	fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
	321	&fsl_dcu_regmap_config);
	322	if (IS_ERR(fsl_dev->regmap)) {
	323	dev_err(dev, "regmap init failed\n");
	324	return PTR_ERR(fsl_dev->regmap);
	325	}
	326
109eee2f JW	327	fsl_dev->clk = devm_clk_get(dev, "dcu");
109eee2f JW	328	if (IS_ERR(fsl_dev->clk)) {
109eee2f	329	dev_err(dev, "failed to get dcu clock\n");
73fa3033	330	return PTR_ERR(fsl_dev->clk);
109eee2f	331	}
73fa3033	332	ret = clk_prepare_enable(fsl_dev->clk);
109eee2f JW	333	if (ret < 0) {
109eee2f JW	334	dev_err(dev, "failed to enable dcu clk\n");
109eee2f JW	335	return ret;
	336	}
	337
2d701449 SA	338	pix_clk_in = devm_clk_get(dev, "pix");
	339	if (IS_ERR(pix_clk_in)) {
	340	/* legancy binding, use dcu clock as pixel clock input */
	341	pix_clk_in = fsl_dev->clk;
	342	}
	343
	344	pix_clk_in_name = __clk_get_name(pix_clk_in);
	345	snprintf(pix_clk_name, sizeof(pix_clk_name), "%s_pix", pix_clk_in_name);
	346	fsl_dev->pix_clk = clk_register_divider(dev, pix_clk_name,
	347	pix_clk_in_name, 0, base + DCU_DIV_RATIO,
	348	0, 8, CLK_DIVIDER_ROUND_CLOSEST, NULL);
f93500f4	349	if (IS_ERR(fsl_dev->pix_clk)) {
2d701449 SA	350	dev_err(dev, "failed to register pix clk\n");
	351	ret = PTR_ERR(fsl_dev->pix_clk);
	352	goto disable_clk;
f93500f4	353	}
2d701449	354
f93500f4 SA	355	ret = clk_prepare_enable(fsl_dev->pix_clk);
	356	if (ret < 0) {
	357	dev_err(dev, "failed to enable pix clk\n");
2d701449	358	goto unregister_pix_clk;
f93500f4 SA	359	}
f93500f4 SA	360
fb127b79 SA	361	fsl_dev->tcon = fsl_tcon_init(dev);
fb127b79 SA	362
109eee2f	363	drm = drm_dev_alloc(driver, dev);
73fa3033 SA	364	if (!drm) {
73fa3033 SA	365	ret = -ENOMEM;
f93500f4	366	goto disable_pix_clk;
73fa3033	367	}
109eee2f JW	368
	369	fsl_dev->dev = dev;
	370	fsl_dev->drm = drm;
	371	fsl_dev->np = dev->of_node;
	372	drm->dev_private = fsl_dev;
	373	dev_set_drvdata(dev, fsl_dev);
109eee2f JW	374
	375	ret = drm_dev_register(drm, 0);
	376	if (ret < 0)
	377	goto unref;
	378
	379	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
	380	driver->major, driver->minor, driver->patchlevel,
	381	driver->date, drm->primary->index);
	382
	383	return 0;
	384
	385	unref:
	386	drm_dev_unref(drm);
f93500f4 SA	387	disable_pix_clk:
f93500f4 SA	388	clk_disable_unprepare(fsl_dev->pix_clk);
2d701449 SA	389	unregister_pix_clk:
2d701449 SA	390	clk_unregister(fsl_dev->pix_clk);
73fa3033 SA	391	disable_clk:
73fa3033 SA	392	clk_disable_unprepare(fsl_dev->clk);
109eee2f JW	393	return ret;
	394	}
	395
	396	static int fsl_dcu_drm_remove(struct platform_device *pdev)
	397	{
	398	struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
	399
73fa3033	400	clk_disable_unprepare(fsl_dev->clk);
f93500f4	401	clk_disable_unprepare(fsl_dev->pix_clk);
2d701449	402	clk_unregister(fsl_dev->pix_clk);
109eee2f JW	403	drm_put_dev(fsl_dev->drm);
	404
	405	return 0;
	406	}
	407
	408	static struct platform_driver fsl_dcu_drm_platform_driver = {
	409	.probe = fsl_dcu_drm_probe,
	410	.remove = fsl_dcu_drm_remove,
	411	.driver = {
	412	.name = "fsl-dcu",
	413	.pm = &fsl_dcu_drm_pm_ops,
	414	.of_match_table = fsl_dcu_of_match,
	415	},
	416	};
	417
	418	module_platform_driver(fsl_dcu_drm_platform_driver);
	419
	420	MODULE_DESCRIPTION("Freescale DCU DRM Driver");
	421	MODULE_LICENSE("GPL");