[deliverable/linux.git] / drivers / gpu / drm / rcar-du / rcar_du_drv.c

/*
 * rcar_du_drv.c  --  R-Car Display Unit DRM driver
 *
 * Copyright (C) 2013 Renesas Corporation
 *
 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
 *
 * 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/io.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/slab.h>

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

#include "rcar_du_crtc.h"
#include "rcar_du_drv.h"
#include "rcar_du_kms.h"
#include "rcar_du_regs.h"

/* -----------------------------------------------------------------------------
 * DRM operations
 */

static int rcar_du_unload(struct drm_device *dev)
{
	drm_kms_helper_poll_fini(dev);
	drm_mode_config_cleanup(dev);
	drm_vblank_cleanup(dev);

	dev->irq_enabled = 0;
	dev->dev_private = NULL;

	return 0;
}

static int rcar_du_load(struct drm_device *dev, unsigned long flags)
{
	struct platform_device *pdev = dev->platformdev;
	struct rcar_du_platform_data *pdata = pdev->dev.platform_data;
	struct rcar_du_device *rcdu;
	struct resource *mem;
	int ret;

	if (pdata == NULL) {
		dev_err(dev->dev, "no platform data\n");
		return -ENODEV;
	}

	rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
	if (rcdu == NULL) {
		dev_err(dev->dev, "failed to allocate private data\n");
		return -ENOMEM;
	}

	rcdu->dev = &pdev->dev;
	rcdu->pdata = pdata;
	rcdu->info = (struct rcar_du_device_info *)pdev->id_entry->driver_data;
	rcdu->ddev = dev;
	dev->dev_private = rcdu;

	/* I/O resources */
	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
	if (IS_ERR(rcdu->mmio))
		return PTR_ERR(rcdu->mmio);

	/* DRM/KMS objects */
	ret = rcar_du_modeset_init(rcdu);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to initialize DRM/KMS\n");
		goto done;
	}

	/* vblank handling */
	ret = drm_vblank_init(dev, (1 << rcdu->num_crtcs) - 1);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to initialize vblank\n");
		goto done;
	}

	dev->irq_enabled = 1;

	platform_set_drvdata(pdev, rcdu);

done:
	if (ret)
		rcar_du_unload(dev);

	return ret;
}

static void rcar_du_preclose(struct drm_device *dev, struct drm_file *file)
{
	struct rcar_du_device *rcdu = dev->dev_private;
	unsigned int i;

	for (i = 0; i < rcdu->num_crtcs; ++i)
		rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
}

static int rcar_du_enable_vblank(struct drm_device *dev, int crtc)
{
	struct rcar_du_device *rcdu = dev->dev_private;

	rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], true);

	return 0;
}

static void rcar_du_disable_vblank(struct drm_device *dev, int crtc)
{
	struct rcar_du_device *rcdu = dev->dev_private;

	rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], false);
}

static const struct file_operations rcar_du_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,
	.fasync		= drm_fasync,
	.llseek		= no_llseek,
	.mmap		= drm_gem_cma_mmap,
};

static struct drm_driver rcar_du_driver = {
	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME,
	.load			= rcar_du_load,
	.unload			= rcar_du_unload,
	.preclose		= rcar_du_preclose,
	.get_vblank_counter	= drm_vblank_count,
	.enable_vblank		= rcar_du_enable_vblank,
	.disable_vblank		= rcar_du_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		= rcar_du_dumb_create,
	.dumb_map_offset	= drm_gem_cma_dumb_map_offset,
	.dumb_destroy		= drm_gem_cma_dumb_destroy,
	.fops			= &rcar_du_fops,
	.name			= "rcar-du",
	.desc			= "Renesas R-Car Display Unit",
	.date			= "20130110",
	.major			= 1,
	.minor			= 0,
};

/* -----------------------------------------------------------------------------
 * Power management
 */

#if CONFIG_PM_SLEEP
static int rcar_du_pm_suspend(struct device *dev)
{
	struct rcar_du_device *rcdu = dev_get_drvdata(dev);

	drm_kms_helper_poll_disable(rcdu->ddev);
	/* TODO Suspend the CRTC */

	return 0;
}

static int rcar_du_pm_resume(struct device *dev)
{
	struct rcar_du_device *rcdu = dev_get_drvdata(dev);

	/* TODO Resume the CRTC */

	drm_kms_helper_poll_enable(rcdu->ddev);
	return 0;
}
#endif

static const struct dev_pm_ops rcar_du_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
};

/* -----------------------------------------------------------------------------
 * Platform driver
 */

static int rcar_du_probe(struct platform_device *pdev)
{
	return drm_platform_init(&rcar_du_driver, pdev);
}

static int rcar_du_remove(struct platform_device *pdev)
{
	drm_platform_exit(&rcar_du_driver, pdev);

	return 0;
}

static const struct rcar_du_device_info rcar_du_r8a7779_info = {
	.features = 0,
	.num_crtcs = 2,
	.routes = {
		/* R8A7779 has two RGB outputs and one (currently unsupported)
		 * TCON output.
		 */
		[RCAR_DU_OUTPUT_DPAD0] = {
			.possible_crtcs = BIT(0),
			.encoder_type = DRM_MODE_ENCODER_NONE,
		},
		[RCAR_DU_OUTPUT_DPAD1] = {
			.possible_crtcs = BIT(1) | BIT(0),
			.encoder_type = DRM_MODE_ENCODER_NONE,
		},
	},
	.num_lvds = 0,
};

static const struct rcar_du_device_info rcar_du_r8a7790_info = {
	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_ALIGN_128B
		  | RCAR_DU_FEATURE_DEFR8,
	.num_crtcs = 3,
	.routes = {
		/* R8A7790 has one RGB output, two LVDS outputs and one
		 * (currently unsupported) TCON output.
		 */
		[RCAR_DU_OUTPUT_DPAD0] = {
			.possible_crtcs = BIT(2) | BIT(1) | BIT(0),
			.encoder_type = DRM_MODE_ENCODER_NONE,
		},
		[RCAR_DU_OUTPUT_LVDS0] = {
			.possible_crtcs = BIT(0),
			.encoder_type = DRM_MODE_ENCODER_LVDS,
		},
		[RCAR_DU_OUTPUT_LVDS1] = {
			.possible_crtcs = BIT(2) | BIT(1),
			.encoder_type = DRM_MODE_ENCODER_LVDS,
		},
	},
	.num_lvds = 2,
};

static const struct platform_device_id rcar_du_id_table[] = {
	{ "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info },
	{ "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info },
	{ }
};

MODULE_DEVICE_TABLE(platform, rcar_du_id_table);

static struct platform_driver rcar_du_platform_driver = {
	.probe		= rcar_du_probe,
	.remove		= rcar_du_remove,
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= "rcar-du",
		.pm	= &rcar_du_pm_ops,
	},
	.id_table	= rcar_du_id_table,
};

module_platform_driver(rcar_du_platform_driver);

MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
4bf8e196 LP	1	/*
	2	* rcar_du_drv.c -- R-Car Display Unit DRM driver
	3	*
	4	* Copyright (C) 2013 Renesas Corporation
	5	*
	6	* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*/
	13
	14	#include <linux/clk.h>
	15	#include <linux/io.h>
	16	#include <linux/mm.h>
	17	#include <linux/module.h>
	18	#include <linux/platform_device.h>
	19	#include <linux/pm.h>
	20	#include <linux/slab.h>
	21
	22	#include <drm/drmP.h>
	23	#include <drm/drm_crtc_helper.h>
	24	#include <drm/drm_gem_cma_helper.h>
	25
	26	#include "rcar_du_crtc.h"
	27	#include "rcar_du_drv.h"
	28	#include "rcar_du_kms.h"
	29	#include "rcar_du_regs.h"
	30
4bf8e196 LP	31	/* -----------------------------------------------------------------------------
	32	* DRM operations
	33	*/
	34
	35	static int rcar_du_unload(struct drm_device *dev)
	36	{
	37	drm_kms_helper_poll_fini(dev);
	38	drm_mode_config_cleanup(dev);
	39	drm_vblank_cleanup(dev);
4bf8e196	40
f66ee304	41	dev->irq_enabled = 0;
4bf8e196 LP	42	dev->dev_private = NULL;
	43
	44	return 0;
	45	}
	46
	47	static int rcar_du_load(struct drm_device *dev, unsigned long flags)
	48	{
	49	struct platform_device *pdev = dev->platformdev;
	50	struct rcar_du_platform_data *pdata = pdev->dev.platform_data;
	51	struct rcar_du_device *rcdu;
4bf8e196 LP	52	struct resource *mem;
	53	int ret;
	54
	55	if (pdata == NULL) {
	56	dev_err(dev->dev, "no platform data\n");
	57	return -ENODEV;
	58	}
	59
	60	rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
	61	if (rcdu == NULL) {
	62	dev_err(dev->dev, "failed to allocate private data\n");
	63	return -ENOMEM;
	64	}
	65
	66	rcdu->dev = &pdev->dev;
	67	rcdu->pdata = pdata;
481d342e	68	rcdu->info = (struct rcar_du_device_info *)pdev->id_entry->driver_data;
4bf8e196 LP	69	rcdu->ddev = dev;
	70	dev->dev_private = rcdu;
	71
f66ee304	72	/* I/O resources */
4bf8e196	73	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
d5b6dcc4 LP	74	rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
	75	if (IS_ERR(rcdu->mmio))
	76	return PTR_ERR(rcdu->mmio);
4bf8e196	77
4bf8e196 LP	78	/* DRM/KMS objects */
	79	ret = rcar_du_modeset_init(rcdu);
	80	if (ret < 0) {
	81	dev_err(&pdev->dev, "failed to initialize DRM/KMS\n");
	82	goto done;
	83	}
	84
f66ee304	85	/* vblank handling */
4bf8e196 LP	86	ret = drm_vblank_init(dev, (1 << rcdu->num_crtcs) - 1);
	87	if (ret < 0) {
	88	dev_err(&pdev->dev, "failed to initialize vblank\n");
	89	goto done;
	90	}
	91
f66ee304	92	dev->irq_enabled = 1;
4bf8e196 LP	93
	94	platform_set_drvdata(pdev, rcdu);
	95
	96	done:
	97	if (ret)
	98	rcar_du_unload(dev);
	99
	100	return ret;
	101	}
	102
	103	static void rcar_du_preclose(struct drm_device dev, struct drm_file file)
	104	{
	105	struct rcar_du_device *rcdu = dev->dev_private;
	106	unsigned int i;
	107
990d07a5	108	for (i = 0; i < rcdu->num_crtcs; ++i)
4bf8e196 LP	109	rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
	110	}
	111
4bf8e196 LP	112	static int rcar_du_enable_vblank(struct drm_device *dev, int crtc)
	113	{
	114	struct rcar_du_device *rcdu = dev->dev_private;
	115
	116	rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], true);
	117
	118	return 0;
	119	}
	120
	121	static void rcar_du_disable_vblank(struct drm_device *dev, int crtc)
	122	{
	123	struct rcar_du_device *rcdu = dev->dev_private;
	124
	125	rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], false);
	126	}
	127
	128	static const struct file_operations rcar_du_fops = {
	129	.owner = THIS_MODULE,
	130	.open = drm_open,
	131	.release = drm_release,
	132	.unlocked_ioctl = drm_ioctl,
	133	#ifdef CONFIG_COMPAT
	134	.compat_ioctl = drm_compat_ioctl,
	135	#endif
	136	.poll = drm_poll,
	137	.read = drm_read,
	138	.fasync = drm_fasync,
	139	.llseek = no_llseek,
	140	.mmap = drm_gem_cma_mmap,
	141	};
	142
	143	static struct drm_driver rcar_du_driver = {
f66ee304	144	.driver_features = DRIVER_GEM \| DRIVER_MODESET \| DRIVER_PRIME,
4bf8e196 LP	145	.load = rcar_du_load,
	146	.unload = rcar_du_unload,
	147	.preclose = rcar_du_preclose,
4bf8e196 LP	148	.get_vblank_counter = drm_vblank_count,
	149	.enable_vblank = rcar_du_enable_vblank,
	150	.disable_vblank = rcar_du_disable_vblank,
	151	.gem_free_object = drm_gem_cma_free_object,
	152	.gem_vm_ops = &drm_gem_cma_vm_ops,
	153	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	154	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
ffb40400 LP	155	.gem_prime_import = drm_gem_prime_import,
	156	.gem_prime_export = drm_gem_prime_export,
	157	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	158	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	159	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	160	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	161	.gem_prime_mmap = drm_gem_cma_prime_mmap,
59e32642	162	.dumb_create = rcar_du_dumb_create,
4bf8e196 LP	163	.dumb_map_offset = drm_gem_cma_dumb_map_offset,
	164	.dumb_destroy = drm_gem_cma_dumb_destroy,
	165	.fops = &rcar_du_fops,
	166	.name = "rcar-du",
	167	.desc = "Renesas R-Car Display Unit",
	168	.date = "20130110",
	169	.major = 1,
	170	.minor = 0,
	171	};
	172
	173	/* -----------------------------------------------------------------------------
	174	* Power management
	175	*/
	176
	177	#if CONFIG_PM_SLEEP
	178	static int rcar_du_pm_suspend(struct device *dev)
	179	{
	180	struct rcar_du_device *rcdu = dev_get_drvdata(dev);
	181
	182	drm_kms_helper_poll_disable(rcdu->ddev);
	183	/* TODO Suspend the CRTC */
	184
	185	return 0;
	186	}
	187
	188	static int rcar_du_pm_resume(struct device *dev)
	189	{
	190	struct rcar_du_device *rcdu = dev_get_drvdata(dev);
	191
	192	/* TODO Resume the CRTC */
	193
	194	drm_kms_helper_poll_enable(rcdu->ddev);
	195	return 0;
	196	}
	197	#endif
	198
	199	static const struct dev_pm_ops rcar_du_pm_ops = {
	200	SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
	201	};
	202
	203	/* -----------------------------------------------------------------------------
	204	* Platform driver
	205	*/
	206
	207	static int rcar_du_probe(struct platform_device *pdev)
	208	{
	209	return drm_platform_init(&rcar_du_driver, pdev);
	210	}
	211
	212	static int rcar_du_remove(struct platform_device *pdev)
	213	{
	214	drm_platform_exit(&rcar_du_driver, pdev);
	215
	216	return 0;
	217	}
	218
481d342e LP	219	static const struct rcar_du_device_info rcar_du_r8a7779_info = {
481d342e LP	220	.features = 0,
a5f0ef59	221	.num_crtcs = 2,
ef67a902 LP	222	.routes = {
	223	/* R8A7779 has two RGB outputs and one (currently unsupported)
	224	* TCON output.
	225	*/
	226	[RCAR_DU_OUTPUT_DPAD0] = {
	227	.possible_crtcs = BIT(0),
	228	.encoder_type = DRM_MODE_ENCODER_NONE,
	229	},
	230	[RCAR_DU_OUTPUT_DPAD1] = {
	231	.possible_crtcs = BIT(1) \| BIT(0),
	232	.encoder_type = DRM_MODE_ENCODER_NONE,
	233	},
	234	},
90374b5c	235	.num_lvds = 0,
481d342e LP	236	};
481d342e LP	237
ef2d84be	238	static const struct rcar_du_device_info rcar_du_r8a7790_info = {
38b62fb3 LP	239	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK \| RCAR_DU_FEATURE_ALIGN_128B
38b62fb3 LP	240	\| RCAR_DU_FEATURE_DEFR8,
a5f0ef59	241	.num_crtcs = 3,
ef67a902 LP	242	.routes = {
	243	/* R8A7790 has one RGB output, two LVDS outputs and one
	244	* (currently unsupported) TCON output.
	245	*/
	246	[RCAR_DU_OUTPUT_DPAD0] = {
	247	.possible_crtcs = BIT(2) \| BIT(1) \| BIT(0),
	248	.encoder_type = DRM_MODE_ENCODER_NONE,
	249	},
	250	[RCAR_DU_OUTPUT_LVDS0] = {
	251	.possible_crtcs = BIT(0),
	252	.encoder_type = DRM_MODE_ENCODER_LVDS,
	253	},
	254	[RCAR_DU_OUTPUT_LVDS1] = {
	255	.possible_crtcs = BIT(2) \| BIT(1),
	256	.encoder_type = DRM_MODE_ENCODER_LVDS,
	257	},
	258	},
90374b5c	259	.num_lvds = 2,
ef2d84be LP	260	};
ef2d84be LP	261
481d342e LP	262	static const struct platform_device_id rcar_du_id_table[] = {
481d342e LP	263	{ "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info },
ef2d84be	264	{ "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info },
481d342e LP	265	{ }
	266	};
	267
	268	MODULE_DEVICE_TABLE(platform, rcar_du_id_table);
	269
4bf8e196 LP	270	static struct platform_driver rcar_du_platform_driver = {
	271	.probe = rcar_du_probe,
	272	.remove = rcar_du_remove,
	273	.driver = {
	274	.owner = THIS_MODULE,
	275	.name = "rcar-du",
	276	.pm = &rcar_du_pm_ops,
	277	},
481d342e	278	.id_table = rcar_du_id_table,
4bf8e196 LP	279	};
	280
	281	module_platform_driver(rcar_du_platform_driver);
	282
	283	MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
	284	MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
	285	MODULE_LICENSE("GPL");