[thirdparty/kernel/stable.git] / drivers / gpu / drm / shmobile / shmob_drm_drv.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * shmob_drm_drv.c  --  SH Mobile DRM driver
 *
 * Copyright (C) 2012 Renesas Electronics Corporation
 *
 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
 */

#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 <drm/drm_probe_helper.h>

#include "shmob_drm_drv.h"
#include "shmob_drm_kms.h"
#include "shmob_drm_plane.h"
#include "shmob_drm_regs.h"

/* -----------------------------------------------------------------------------
 * Hardware initialization
 */

static int shmob_drm_init_interface(struct shmob_drm_device *sdev)
{
	static const u32 ldmt1r[] = {
		[SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8,
		[SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9,
		[SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A,
		[SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B,
		[SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16,
		[SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18,
		[SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24,
		[SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR,
		[SHMOB_DRM_IFACE_SYS8A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8A,
		[SHMOB_DRM_IFACE_SYS8B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8B,
		[SHMOB_DRM_IFACE_SYS8C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8C,
		[SHMOB_DRM_IFACE_SYS8D] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8D,
		[SHMOB_DRM_IFACE_SYS9] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS9,
		[SHMOB_DRM_IFACE_SYS12] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS12,
		[SHMOB_DRM_IFACE_SYS16A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16A,
		[SHMOB_DRM_IFACE_SYS16B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16B,
		[SHMOB_DRM_IFACE_SYS16C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16C,
		[SHMOB_DRM_IFACE_SYS18] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS18,
		[SHMOB_DRM_IFACE_SYS24] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS24,
	};

	if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) {
		dev_err(sdev->dev, "invalid interface type %u\n",
			sdev->pdata->iface.interface);
		return -EINVAL;
	}

	sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface];
	return 0;
}

static int shmob_drm_setup_clocks(struct shmob_drm_device *sdev,
					    enum shmob_drm_clk_source clksrc)
{
	struct clk *clk;
	char *clkname;

	switch (clksrc) {
	case SHMOB_DRM_CLK_BUS:
		clkname = "bus_clk";
		sdev->lddckr = LDDCKR_ICKSEL_BUS;
		break;
	case SHMOB_DRM_CLK_PERIPHERAL:
		clkname = "peripheral_clk";
		sdev->lddckr = LDDCKR_ICKSEL_MIPI;
		break;
	case SHMOB_DRM_CLK_EXTERNAL:
		clkname = NULL;
		sdev->lddckr = LDDCKR_ICKSEL_HDMI;
		break;
	default:
		return -EINVAL;
	}

	clk = devm_clk_get(sdev->dev, clkname);
	if (IS_ERR(clk)) {
		dev_err(sdev->dev, "cannot get dot clock %s\n", clkname);
		return PTR_ERR(clk);
	}

	sdev->clock = clk;
	return 0;
}

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

static irqreturn_t shmob_drm_irq(int irq, void *arg)
{
	struct drm_device *dev = arg;
	struct shmob_drm_device *sdev = dev->dev_private;
	unsigned long flags;
	u32 status;

	/* Acknowledge interrupts. Putting interrupt enable and interrupt flag
	 * bits in the same register is really brain-dead design and requires
	 * taking a spinlock.
	 */
	spin_lock_irqsave(&sdev->irq_lock, flags);
	status = lcdc_read(sdev, LDINTR);
	lcdc_write(sdev, LDINTR, status ^ LDINTR_STATUS_MASK);
	spin_unlock_irqrestore(&sdev->irq_lock, flags);

	if (status & LDINTR_VES) {
		drm_handle_vblank(dev, 0);
		shmob_drm_crtc_finish_page_flip(&sdev->crtc);
	}

	return IRQ_HANDLED;
}

DEFINE_DRM_GEM_CMA_FOPS(shmob_drm_fops);

static struct drm_driver shmob_drm_driver = {
	.driver_features	= DRIVER_GEM | DRIVER_MODESET
				| DRIVER_PRIME,
	.irq_handler		= shmob_drm_irq,
	.gem_free_object_unlocked = 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,
	.fops			= &shmob_drm_fops,
	.name			= "shmob-drm",
	.desc			= "Renesas SH Mobile DRM",
	.date			= "20120424",
	.major			= 1,
	.minor			= 0,
};

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

#ifdef CONFIG_PM_SLEEP
static int shmob_drm_pm_suspend(struct device *dev)
{
	struct shmob_drm_device *sdev = dev_get_drvdata(dev);

	drm_kms_helper_poll_disable(sdev->ddev);
	shmob_drm_crtc_suspend(&sdev->crtc);

	return 0;
}

static int shmob_drm_pm_resume(struct device *dev)
{
	struct shmob_drm_device *sdev = dev_get_drvdata(dev);

	drm_modeset_lock_all(sdev->ddev);
	shmob_drm_crtc_resume(&sdev->crtc);
	drm_modeset_unlock_all(sdev->ddev);

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

static const struct dev_pm_ops shmob_drm_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume)
};

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

static int shmob_drm_remove(struct platform_device *pdev)
{
	struct shmob_drm_device *sdev = platform_get_drvdata(pdev);
	struct drm_device *ddev = sdev->ddev;

	drm_dev_unregister(ddev);
	drm_kms_helper_poll_fini(ddev);
	drm_mode_config_cleanup(ddev);
	drm_irq_uninstall(ddev);
	drm_dev_put(ddev);

	return 0;
}

static int shmob_drm_probe(struct platform_device *pdev)
{
	struct shmob_drm_platform_data *pdata = pdev->dev.platform_data;
	struct shmob_drm_device *sdev;
	struct drm_device *ddev;
	struct resource *res;
	unsigned int i;
	int ret;

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

	/*
	 * Allocate and initialize the driver private data, I/O resources and
	 * clocks.
	 */
	sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL);
	if (sdev == NULL)
		return -ENOMEM;

	sdev->dev = &pdev->dev;
	sdev->pdata = pdata;
	spin_lock_init(&sdev->irq_lock);

	platform_set_drvdata(pdev, sdev);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	sdev->mmio = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(sdev->mmio))
		return PTR_ERR(sdev->mmio);

	ret = shmob_drm_setup_clocks(sdev, pdata->clk_source);
	if (ret < 0)
		return ret;

	ret = shmob_drm_init_interface(sdev);
	if (ret < 0)
		return ret;

	/* Allocate and initialize the DRM device. */
	ddev = drm_dev_alloc(&shmob_drm_driver, &pdev->dev);
	if (IS_ERR(ddev))
		return PTR_ERR(ddev);

	sdev->ddev = ddev;
	ddev->dev_private = sdev;

	ret = shmob_drm_modeset_init(sdev);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to initialize mode setting\n");
		goto err_free_drm_dev;
	}

	for (i = 0; i < 4; ++i) {
		ret = shmob_drm_plane_create(sdev, i);
		if (ret < 0) {
			dev_err(&pdev->dev, "failed to create plane %u\n", i);
			goto err_modeset_cleanup;
		}
	}

	ret = drm_vblank_init(ddev, 1);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to initialize vblank\n");
		goto err_modeset_cleanup;
	}

	ret = drm_irq_install(ddev, platform_get_irq(pdev, 0));
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to install IRQ handler\n");
		goto err_modeset_cleanup;
	}

	/*
	 * Register the DRM device with the core and the connectors with
	 * sysfs.
	 */
	ret = drm_dev_register(ddev, 0);
	if (ret < 0)
		goto err_irq_uninstall;

	return 0;

err_irq_uninstall:
	drm_irq_uninstall(ddev);
err_modeset_cleanup:
	drm_kms_helper_poll_fini(ddev);
	drm_mode_config_cleanup(ddev);
err_free_drm_dev:
	drm_dev_put(ddev);

	return ret;
}

static struct platform_driver shmob_drm_platform_driver = {
	.probe		= shmob_drm_probe,
	.remove		= shmob_drm_remove,
	.driver		= {
		.name	= "shmob-drm",
		.pm	= &shmob_drm_pm_ops,
	},
};

module_platform_driver(shmob_drm_platform_driver);

MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
MODULE_DESCRIPTION("Renesas SH Mobile DRM Driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
59104f23	1	// SPDX-License-Identifier: GPL-2.0+
51c13278 LP	2	/*
	3	* shmob_drm_drv.c -- SH Mobile DRM driver
	4	*
9588b826	5	* Copyright (C) 2012 Renesas Electronics Corporation
51c13278 LP	6	*
51c13278 LP	7	* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
51c13278 LP	8	*/
	9
	10	#include <linux/clk.h>
	11	#include <linux/io.h>
	12	#include <linux/mm.h>
	13	#include <linux/module.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/pm.h>
	16	#include <linux/slab.h>
	17
	18	#include <drm/drmP.h>
	19	#include <drm/drm_crtc_helper.h>
	20	#include <drm/drm_gem_cma_helper.h>
fcd70cd3	21	#include <drm/drm_probe_helper.h>
51c13278	22
51c13278 LP	23	#include "shmob_drm_drv.h"
	24	#include "shmob_drm_kms.h"
	25	#include "shmob_drm_plane.h"
	26	#include "shmob_drm_regs.h"
	27
	28	/* -----------------------------------------------------------------------------
	29	* Hardware initialization
	30	*/
	31
56550d94	32	static int shmob_drm_init_interface(struct shmob_drm_device *sdev)
51c13278 LP	33	{
	34	static const u32 ldmt1r[] = {
	35	[SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8,
	36	[SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9,
	37	[SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A,
	38	[SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B,
	39	[SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16,
	40	[SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18,
	41	[SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24,
	42	[SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR,
	43	[SHMOB_DRM_IFACE_SYS8A] = LDMT1R_IFM \| LDMT1R_MIFTYP_SYS8A,
	44	[SHMOB_DRM_IFACE_SYS8B] = LDMT1R_IFM \| LDMT1R_MIFTYP_SYS8B,
	45	[SHMOB_DRM_IFACE_SYS8C] = LDMT1R_IFM \| LDMT1R_MIFTYP_SYS8C,
	46	[SHMOB_DRM_IFACE_SYS8D] = LDMT1R_IFM \| LDMT1R_MIFTYP_SYS8D,
	47	[SHMOB_DRM_IFACE_SYS9] = LDMT1R_IFM \| LDMT1R_MIFTYP_SYS9,
	48	[SHMOB_DRM_IFACE_SYS12] = LDMT1R_IFM \| LDMT1R_MIFTYP_SYS12,
	49	[SHMOB_DRM_IFACE_SYS16A] = LDMT1R_IFM \| LDMT1R_MIFTYP_SYS16A,
	50	[SHMOB_DRM_IFACE_SYS16B] = LDMT1R_IFM \| LDMT1R_MIFTYP_SYS16B,
	51	[SHMOB_DRM_IFACE_SYS16C] = LDMT1R_IFM \| LDMT1R_MIFTYP_SYS16C,
	52	[SHMOB_DRM_IFACE_SYS18] = LDMT1R_IFM \| LDMT1R_MIFTYP_SYS18,
	53	[SHMOB_DRM_IFACE_SYS24] = LDMT1R_IFM \| LDMT1R_MIFTYP_SYS24,
	54	};
	55
	56	if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) {
	57	dev_err(sdev->dev, "invalid interface type %u\n",
	58	sdev->pdata->iface.interface);
	59	return -EINVAL;
	60	}
	61
	62	sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface];
	63	return 0;
	64	}
	65
56550d94	66	static int shmob_drm_setup_clocks(struct shmob_drm_device *sdev,
51c13278 LP	67	enum shmob_drm_clk_source clksrc)
	68	{
	69	struct clk *clk;
	70	char *clkname;
	71
	72	switch (clksrc) {
	73	case SHMOB_DRM_CLK_BUS:
	74	clkname = "bus_clk";
	75	sdev->lddckr = LDDCKR_ICKSEL_BUS;
	76	break;
	77	case SHMOB_DRM_CLK_PERIPHERAL:
	78	clkname = "peripheral_clk";
	79	sdev->lddckr = LDDCKR_ICKSEL_MIPI;
	80	break;
	81	case SHMOB_DRM_CLK_EXTERNAL:
	82	clkname = NULL;
	83	sdev->lddckr = LDDCKR_ICKSEL_HDMI;
	84	break;
	85	default:
	86	return -EINVAL;
	87	}
	88
16ad3b2c	89	clk = devm_clk_get(sdev->dev, clkname);
51c13278 LP	90	if (IS_ERR(clk)) {
	91	dev_err(sdev->dev, "cannot get dot clock %s\n", clkname);
	92	return PTR_ERR(clk);
	93	}
	94
	95	sdev->clock = clk;
	96	return 0;
	97	}
	98
	99	/* -----------------------------------------------------------------------------
	100	* DRM operations
	101	*/
	102
51c13278 LP	103	static irqreturn_t shmob_drm_irq(int irq, void *arg)
	104	{
	105	struct drm_device *dev = arg;
	106	struct shmob_drm_device *sdev = dev->dev_private;
	107	unsigned long flags;
	108	u32 status;
	109
	110	/* Acknowledge interrupts. Putting interrupt enable and interrupt flag
	111	* bits in the same register is really brain-dead design and requires
	112	* taking a spinlock.
	113	*/
	114	spin_lock_irqsave(&sdev->irq_lock, flags);
	115	status = lcdc_read(sdev, LDINTR);
	116	lcdc_write(sdev, LDINTR, status ^ LDINTR_STATUS_MASK);
	117	spin_unlock_irqrestore(&sdev->irq_lock, flags);
	118
	119	if (status & LDINTR_VES) {
	120	drm_handle_vblank(dev, 0);
	121	shmob_drm_crtc_finish_page_flip(&sdev->crtc);
	122	}
	123
	124	return IRQ_HANDLED;
	125	}
	126
d55f7e5d	127	DEFINE_DRM_GEM_CMA_FOPS(shmob_drm_fops);
51c13278 LP	128
51c13278 LP	129	static struct drm_driver shmob_drm_driver = {
5b38e747	130	.driver_features = DRIVER_GEM \| DRIVER_MODESET
416c3900	131	\| DRIVER_PRIME,
51c13278	132	.irq_handler = shmob_drm_irq,
6fde01dc	133	.gem_free_object_unlocked = drm_gem_cma_free_object,
51c13278	134	.gem_vm_ops = &drm_gem_cma_vm_ops,
416c3900 LP	135	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
416c3900 LP	136	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
58cbd3ac LP	137	.gem_prime_import = drm_gem_prime_import,
	138	.gem_prime_export = drm_gem_prime_export,
	139	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	140	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	141	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	142	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	143	.gem_prime_mmap = drm_gem_cma_prime_mmap,
51c13278	144	.dumb_create = drm_gem_cma_dumb_create,
51c13278 LP	145	.fops = &shmob_drm_fops,
	146	.name = "shmob-drm",
	147	.desc = "Renesas SH Mobile DRM",
	148	.date = "20120424",
	149	.major = 1,
	150	.minor = 0,
	151	};
	152
	153	/* -----------------------------------------------------------------------------
	154	* Power management
	155	*/
	156
681ff260	157	#ifdef CONFIG_PM_SLEEP
51c13278 LP	158	static int shmob_drm_pm_suspend(struct device *dev)
51c13278 LP	159	{
a16d4f86	160	struct shmob_drm_device *sdev = dev_get_drvdata(dev);
51c13278	161
a16d4f86	162	drm_kms_helper_poll_disable(sdev->ddev);
51c13278 LP	163	shmob_drm_crtc_suspend(&sdev->crtc);
	164
	165	return 0;
	166	}
	167
	168	static int shmob_drm_pm_resume(struct device *dev)
	169	{
a16d4f86	170	struct shmob_drm_device *sdev = dev_get_drvdata(dev);
51c13278	171
b13f5980	172	drm_modeset_lock_all(sdev->ddev);
51c13278	173	shmob_drm_crtc_resume(&sdev->crtc);
b13f5980	174	drm_modeset_unlock_all(sdev->ddev);
51c13278 LP	175
	176	drm_kms_helper_poll_enable(sdev->ddev);
	177	return 0;
	178	}
	179	#endif
	180
	181	static const struct dev_pm_ops shmob_drm_pm_ops = {
	182	SET_SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume)
	183	};
	184
	185	/* -----------------------------------------------------------------------------
	186	* Platform driver
	187	*/
	188
8f1597c8	189	static int shmob_drm_remove(struct platform_device *pdev)
51c13278	190	{
8f1597c8 LP	191	struct shmob_drm_device *sdev = platform_get_drvdata(pdev);
	192	struct drm_device *ddev = sdev->ddev;
	193
	194	drm_dev_unregister(ddev);
	195	drm_kms_helper_poll_fini(ddev);
	196	drm_mode_config_cleanup(ddev);
	197	drm_irq_uninstall(ddev);
c0ece674	198	drm_dev_put(ddev);
8f1597c8 LP	199
8f1597c8 LP	200	return 0;
51c13278 LP	201	}
51c13278 LP	202
8f1597c8	203	static int shmob_drm_probe(struct platform_device *pdev)
51c13278	204	{
8f1597c8 LP	205	struct shmob_drm_platform_data *pdata = pdev->dev.platform_data;
	206	struct shmob_drm_device *sdev;
	207	struct drm_device *ddev;
	208	struct resource *res;
	209	unsigned int i;
	210	int ret;
	211
	212	if (pdata == NULL) {
	213	dev_err(&pdev->dev, "no platform data\n");
	214	return -EINVAL;
	215	}
405bea7a	216
8f1597c8 LP	217	/*
	218	* Allocate and initialize the driver private data, I/O resources and
	219	* clocks.
	220	*/
	221	sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL);
	222	if (sdev == NULL)
	223	return -ENOMEM;
	224
	225	sdev->dev = &pdev->dev;
	226	sdev->pdata = pdata;
	227	spin_lock_init(&sdev->irq_lock);
	228
	229	platform_set_drvdata(pdev, sdev);
	230
	231	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	232	sdev->mmio = devm_ioremap_resource(&pdev->dev, res);
06c3bbd3 Y	233	if (IS_ERR(sdev->mmio))
06c3bbd3 Y	234	return PTR_ERR(sdev->mmio);
8f1597c8 LP	235
	236	ret = shmob_drm_setup_clocks(sdev, pdata->clk_source);
	237	if (ret < 0)
	238	return ret;
	239
	240	ret = shmob_drm_init_interface(sdev);
	241	if (ret < 0)
	242	return ret;
	243
	244	/* Allocate and initialize the DRM device. */
	245	ddev = drm_dev_alloc(&shmob_drm_driver, &pdev->dev);
	246	if (IS_ERR(ddev))
	247	return PTR_ERR(ddev);
	248
	249	sdev->ddev = ddev;
	250	ddev->dev_private = sdev;
	251
	252	ret = shmob_drm_modeset_init(sdev);
	253	if (ret < 0) {
	254	dev_err(&pdev->dev, "failed to initialize mode setting\n");
	255	goto err_free_drm_dev;
	256	}
	257
	258	for (i = 0; i < 4; ++i) {
	259	ret = shmob_drm_plane_create(sdev, i);
	260	if (ret < 0) {
	261	dev_err(&pdev->dev, "failed to create plane %u\n", i);
	262	goto err_modeset_cleanup;
	263	}
	264	}
	265
	266	ret = drm_vblank_init(ddev, 1);
	267	if (ret < 0) {
	268	dev_err(&pdev->dev, "failed to initialize vblank\n");
	269	goto err_modeset_cleanup;
	270	}
	271
	272	ret = drm_irq_install(ddev, platform_get_irq(pdev, 0));
	273	if (ret < 0) {
	274	dev_err(&pdev->dev, "failed to install IRQ handler\n");
10f98183	275	goto err_modeset_cleanup;
8f1597c8 LP	276	}
	277
	278	/*
	279	* Register the DRM device with the core and the connectors with
	280	* sysfs.
	281	*/
	282	ret = drm_dev_register(ddev, 0);
	283	if (ret < 0)
	284	goto err_irq_uninstall;
51c13278 LP	285
51c13278 LP	286	return 0;
8f1597c8 LP	287
	288	err_irq_uninstall:
	289	drm_irq_uninstall(ddev);
8f1597c8 LP	290	err_modeset_cleanup:
	291	drm_kms_helper_poll_fini(ddev);
	292	drm_mode_config_cleanup(ddev);
	293	err_free_drm_dev:
c0ece674	294	drm_dev_put(ddev);
8f1597c8 LP	295
8f1597c8 LP	296	return ret;
51c13278 LP	297	}
	298
	299	static struct platform_driver shmob_drm_platform_driver = {
	300	.probe = shmob_drm_probe,
56550d94	301	.remove = shmob_drm_remove,
51c13278	302	.driver = {
51c13278 LP	303	.name = "shmob-drm",
	304	.pm = &shmob_drm_pm_ops,
	305	},
	306	};
	307
	308	module_platform_driver(shmob_drm_platform_driver);
	309
	310	MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
	311	MODULE_DESCRIPTION("Renesas SH Mobile DRM Driver");
	312	MODULE_LICENSE("GPL");