drivers/gpu/drm/rcar-du/rcar_du_drv.c - linux-imx - Git at Google

 /*
  * rcar_du_drv.c  --  R-Car Display Unit DRM driver
  *
  * Copyright (C) 2013-2015 Renesas Electronics 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/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
 #include <linux/slab.h>
 #include <linux/wait.h>

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

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

 /* -----------------------------------------------------------------------------
  * Device Information
  */

 static const struct rcar_du_device_info rcar_du_r8a7779_info = {
 	.gen = 2,
 	.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),
 			.port = 0,
 		},
 		[RCAR_DU_OUTPUT_DPAD1] = {
 			.possible_crtcs = BIT(1) | BIT(0),
 			.port = 1,
 		},
 	},
 	.num_lvds = 0,
 };

 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
 	.gen = 2,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
 	.quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
 	.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),
 			.port = 0,
 		},
 		[RCAR_DU_OUTPUT_LVDS0] = {
 			.possible_crtcs = BIT(0),
 			.port = 1,
 		},
 		[RCAR_DU_OUTPUT_LVDS1] = {
 			.possible_crtcs = BIT(2) | BIT(1),
 			.port = 2,
 		},
 	},
 	.num_lvds = 2,
 };

 /* M2-W (r8a7791) and M2-N (r8a7793) are identical */
 static const struct rcar_du_device_info rcar_du_r8a7791_info = {
 	.gen = 2,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
 	.num_crtcs = 2,
 	.routes = {
 		/*
 		 * R8A779[13] has one RGB output, one LVDS output and one
 		 * (currently unsupported) TCON output.
 		 */
 		[RCAR_DU_OUTPUT_DPAD0] = {
 			.possible_crtcs = BIT(1) | BIT(0),
 			.port = 0,
 		},
 		[RCAR_DU_OUTPUT_LVDS0] = {
 			.possible_crtcs = BIT(0),
 			.port = 1,
 		},
 	},
 	.num_lvds = 1,
 };

 static const struct rcar_du_device_info rcar_du_r8a7792_info = {
 	.gen = 2,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
 	.num_crtcs = 2,
 	.routes = {
 		/* R8A7792 has two RGB outputs. */
 		[RCAR_DU_OUTPUT_DPAD0] = {
 			.possible_crtcs = BIT(0),
 			.port = 0,
 		},
 		[RCAR_DU_OUTPUT_DPAD1] = {
 			.possible_crtcs = BIT(1),
 			.port = 1,
 		},
 	},
 	.num_lvds = 0,
 };

 static const struct rcar_du_device_info rcar_du_r8a7794_info = {
 	.gen = 2,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
 	.num_crtcs = 2,
 	.routes = {
 		/*
 		 * R8A7794 has two RGB outputs and one (currently unsupported)
 		 * TCON output.
 		 */
 		[RCAR_DU_OUTPUT_DPAD0] = {
 			.possible_crtcs = BIT(0),
 			.port = 0,
 		},
 		[RCAR_DU_OUTPUT_DPAD1] = {
 			.possible_crtcs = BIT(1),
 			.port = 1,
 		},
 	},
 	.num_lvds = 0,
 };

 static const struct rcar_du_device_info rcar_du_r8a7795_info = {
 	.gen = 3,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
 		  | RCAR_DU_FEATURE_VSP1_SOURCE,
 	.num_crtcs = 4,
 	.routes = {
 		/*
 		 * R8A7795 has one RGB output, two HDMI outputs and one
 		 * LVDS output.
 		 */
 		[RCAR_DU_OUTPUT_DPAD0] = {
 			.possible_crtcs = BIT(3),
 			.port = 0,
 		},
 		[RCAR_DU_OUTPUT_HDMI0] = {
 			.possible_crtcs = BIT(1),
 			.port = 1,
 		},
 		[RCAR_DU_OUTPUT_HDMI1] = {
 			.possible_crtcs = BIT(2),
 			.port = 2,
 		},
 		[RCAR_DU_OUTPUT_LVDS0] = {
 			.possible_crtcs = BIT(0),
 			.port = 3,
 		},
 	},
 	.num_lvds = 1,
 	.dpll_ch =  BIT(1) | BIT(2),
 };

 static const struct rcar_du_device_info rcar_du_r8a7796_info = {
 	.gen = 3,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
 		  | RCAR_DU_FEATURE_VSP1_SOURCE,
 	.num_crtcs = 3,
 	.routes = {
 		/*
 		 * R8A7796 has one RGB output, one LVDS output and one HDMI
 		 * output.
 		 */
 		[RCAR_DU_OUTPUT_DPAD0] = {
 			.possible_crtcs = BIT(2),
 			.port = 0,
 		},
 		[RCAR_DU_OUTPUT_HDMI0] = {
 			.possible_crtcs = BIT(1),
 			.port = 1,
 		},
 		[RCAR_DU_OUTPUT_LVDS0] = {
 			.possible_crtcs = BIT(0),
 			.port = 2,
 		},
 	},
 	.num_lvds = 1,
 	.dpll_ch =  BIT(1),
 };

 static const struct of_device_id rcar_du_of_table[] = {
 	{ .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
 	{ .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
 	{ .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
 	{ .compatible = "renesas,du-r8a7792", .data = &rcar_du_r8a7792_info },
 	{ .compatible = "renesas,du-r8a7793", .data = &rcar_du_r8a7791_info },
 	{ .compatible = "renesas,du-r8a7794", .data = &rcar_du_r8a7794_info },
 	{ .compatible = "renesas,du-r8a7795", .data = &rcar_du_r8a7795_info },
 	{ .compatible = "renesas,du-r8a7796", .data = &rcar_du_r8a7796_info },
 	{ }
 };

 MODULE_DEVICE_TABLE(of, rcar_du_of_table);

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

 static void rcar_du_lastclose(struct drm_device *dev)
 {
 	struct rcar_du_device *rcdu = dev->dev_private;

 	drm_fbdev_cma_restore_mode(rcdu->fbdev);
 }

 DEFINE_DRM_GEM_CMA_FOPS(rcar_du_fops);

 static struct drm_driver rcar_du_driver = {
 	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
 				| DRIVER_ATOMIC,
 	.lastclose		= rcar_du_lastclose,
 	.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		= rcar_du_dumb_create,
 	.fops			= &rcar_du_fops,
 	.name			= "rcar-du",
 	.desc			= "Renesas R-Car Display Unit",
 	.date			= "20130110",
 	.major			= 1,
 	.minor			= 0,
 };

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

 #ifdef 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_remove(struct platform_device *pdev)
 {
 	struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
 	struct drm_device *ddev = rcdu->ddev;

 	drm_dev_unregister(ddev);

 	if (rcdu->fbdev)
 		drm_fbdev_cma_fini(rcdu->fbdev);

 	drm_kms_helper_poll_fini(ddev);
 	drm_mode_config_cleanup(ddev);

 	drm_dev_unref(ddev);

 	return 0;
 }

 static int rcar_du_probe(struct platform_device *pdev)
 {
 	struct rcar_du_device *rcdu;
 	struct drm_device *ddev;
 	struct resource *mem;
 	int ret;

 	/* Allocate and initialize the R-Car device structure. */
 	rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
 	if (rcdu == NULL)
 		return -ENOMEM;

 	rcdu->dev = &pdev->dev;
 	rcdu->info = of_device_get_match_data(rcdu->dev);

 	platform_set_drvdata(pdev, 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 */
 	ddev = drm_dev_alloc(&rcar_du_driver, &pdev->dev);
 	if (IS_ERR(ddev))
 		return PTR_ERR(ddev);

 	rcdu->ddev = ddev;
 	ddev->dev_private = rcdu;

 	ret = rcar_du_modeset_init(rcdu);
 	if (ret < 0) {
 		if (ret != -EPROBE_DEFER)
 			dev_err(&pdev->dev,
 				"failed to initialize DRM/KMS (%d)\n", ret);
 		goto error;
 	}

 	ddev->irq_enabled = 1;

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

 	DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));

 	return 0;

 error:
 	rcar_du_remove(pdev);

 	return ret;
 }

 static struct platform_driver rcar_du_platform_driver = {
 	.probe		= rcar_du_probe,
 	.remove		= rcar_du_remove,
 	.driver		= {
 		.name	= "rcar-du",
 		.pm	= &rcar_du_pm_ops,
 		.of_match_table = rcar_du_of_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");
	/*
	* rcar_du_drv.c -- R-Car Display Unit DRM driver
	*
	* Copyright (C) 2013-2015 Renesas Electronics 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/of_device.h>
	#include <linux/platform_device.h>
	#include <linux/pm.h>
	#include <linux/slab.h>
	#include <linux/wait.h>

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

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

	/* -----------------------------------------------------------------------------
	* Device Information
	*/

	static const struct rcar_du_device_info rcar_du_r8a7779_info = {
	.gen = 2,
	.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),
	.port = 0,
	},
	[RCAR_DU_OUTPUT_DPAD1] = {
	.possible_crtcs = BIT(1) \| BIT(0),
	.port = 1,
	},
	},
	.num_lvds = 0,
	};

	static const struct rcar_du_device_info rcar_du_r8a7790_info = {
	.gen = 2,
	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
	\| RCAR_DU_FEATURE_EXT_CTRL_REGS,
	.quirks = RCAR_DU_QUIRK_ALIGN_128B \| RCAR_DU_QUIRK_LVDS_LANES,
	.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),
	.port = 0,
	},
	[RCAR_DU_OUTPUT_LVDS0] = {
	.possible_crtcs = BIT(0),
	.port = 1,
	},
	[RCAR_DU_OUTPUT_LVDS1] = {
	.possible_crtcs = BIT(2) \| BIT(1),
	.port = 2,
	},
	},
	.num_lvds = 2,
	};

	/* M2-W (r8a7791) and M2-N (r8a7793) are identical */
	static const struct rcar_du_device_info rcar_du_r8a7791_info = {
	.gen = 2,
	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
	\| RCAR_DU_FEATURE_EXT_CTRL_REGS,
	.num_crtcs = 2,
	.routes = {
	/*
	* R8A779[13] has one RGB output, one LVDS output and one
	* (currently unsupported) TCON output.
	*/
	[RCAR_DU_OUTPUT_DPAD0] = {
	.possible_crtcs = BIT(1) \| BIT(0),
	.port = 0,
	},
	[RCAR_DU_OUTPUT_LVDS0] = {
	.possible_crtcs = BIT(0),
	.port = 1,
	},
	},
	.num_lvds = 1,
	};

	static const struct rcar_du_device_info rcar_du_r8a7792_info = {
	.gen = 2,
	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
	\| RCAR_DU_FEATURE_EXT_CTRL_REGS,
	.num_crtcs = 2,
	.routes = {
	/* R8A7792 has two RGB outputs. */
	[RCAR_DU_OUTPUT_DPAD0] = {
	.possible_crtcs = BIT(0),
	.port = 0,
	},
	[RCAR_DU_OUTPUT_DPAD1] = {
	.possible_crtcs = BIT(1),
	.port = 1,
	},
	},
	.num_lvds = 0,
	};

	static const struct rcar_du_device_info rcar_du_r8a7794_info = {
	.gen = 2,
	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
	\| RCAR_DU_FEATURE_EXT_CTRL_REGS,
	.num_crtcs = 2,
	.routes = {
	/*
	* R8A7794 has two RGB outputs and one (currently unsupported)
	* TCON output.
	*/
	[RCAR_DU_OUTPUT_DPAD0] = {
	.possible_crtcs = BIT(0),
	.port = 0,
	},
	[RCAR_DU_OUTPUT_DPAD1] = {
	.possible_crtcs = BIT(1),
	.port = 1,
	},
	},
	.num_lvds = 0,
	};

	static const struct rcar_du_device_info rcar_du_r8a7795_info = {
	.gen = 3,
	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
	\| RCAR_DU_FEATURE_EXT_CTRL_REGS
	\| RCAR_DU_FEATURE_VSP1_SOURCE,
	.num_crtcs = 4,
	.routes = {
	/*
	* R8A7795 has one RGB output, two HDMI outputs and one
	* LVDS output.
	*/
	[RCAR_DU_OUTPUT_DPAD0] = {
	.possible_crtcs = BIT(3),
	.port = 0,
	},
	[RCAR_DU_OUTPUT_HDMI0] = {
	.possible_crtcs = BIT(1),
	.port = 1,
	},
	[RCAR_DU_OUTPUT_HDMI1] = {
	.possible_crtcs = BIT(2),
	.port = 2,
	},
	[RCAR_DU_OUTPUT_LVDS0] = {
	.possible_crtcs = BIT(0),
	.port = 3,
	},
	},
	.num_lvds = 1,
	.dpll_ch = BIT(1) \| BIT(2),
	};

	static const struct rcar_du_device_info rcar_du_r8a7796_info = {
	.gen = 3,
	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
	\| RCAR_DU_FEATURE_EXT_CTRL_REGS
	\| RCAR_DU_FEATURE_VSP1_SOURCE,
	.num_crtcs = 3,
	.routes = {
	/*
	* R8A7796 has one RGB output, one LVDS output and one HDMI
	* output.
	*/
	[RCAR_DU_OUTPUT_DPAD0] = {
	.possible_crtcs = BIT(2),
	.port = 0,
	},
	[RCAR_DU_OUTPUT_HDMI0] = {
	.possible_crtcs = BIT(1),
	.port = 1,
	},
	[RCAR_DU_OUTPUT_LVDS0] = {
	.possible_crtcs = BIT(0),
	.port = 2,
	},
	},
	.num_lvds = 1,
	.dpll_ch = BIT(1),
	};

	static const struct of_device_id rcar_du_of_table[] = {
	{ .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
	{ .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
	{ .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
	{ .compatible = "renesas,du-r8a7792", .data = &rcar_du_r8a7792_info },
	{ .compatible = "renesas,du-r8a7793", .data = &rcar_du_r8a7791_info },
	{ .compatible = "renesas,du-r8a7794", .data = &rcar_du_r8a7794_info },
	{ .compatible = "renesas,du-r8a7795", .data = &rcar_du_r8a7795_info },
	{ .compatible = "renesas,du-r8a7796", .data = &rcar_du_r8a7796_info },
	{ }
	};

	MODULE_DEVICE_TABLE(of, rcar_du_of_table);

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

	static void rcar_du_lastclose(struct drm_device *dev)
	{
	struct rcar_du_device *rcdu = dev->dev_private;

	drm_fbdev_cma_restore_mode(rcdu->fbdev);
	}

	DEFINE_DRM_GEM_CMA_FOPS(rcar_du_fops);

	static struct drm_driver rcar_du_driver = {
	.driver_features = DRIVER_GEM \| DRIVER_MODESET \| DRIVER_PRIME
	\| DRIVER_ATOMIC,
	.lastclose = rcar_du_lastclose,
	.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 = rcar_du_dumb_create,
	.fops = &rcar_du_fops,
	.name = "rcar-du",
	.desc = "Renesas R-Car Display Unit",
	.date = "20130110",
	.major = 1,
	.minor = 0,
	};

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

	#ifdef 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_remove(struct platform_device *pdev)
	{
	struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
	struct drm_device *ddev = rcdu->ddev;

	drm_dev_unregister(ddev);

	if (rcdu->fbdev)
	drm_fbdev_cma_fini(rcdu->fbdev);

	drm_kms_helper_poll_fini(ddev);
	drm_mode_config_cleanup(ddev);

	drm_dev_unref(ddev);

	return 0;
	}

	static int rcar_du_probe(struct platform_device *pdev)
	{
	struct rcar_du_device *rcdu;
	struct drm_device *ddev;
	struct resource *mem;
	int ret;

	/* Allocate and initialize the R-Car device structure. */
	rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
	if (rcdu == NULL)
	return -ENOMEM;

	rcdu->dev = &pdev->dev;
	rcdu->info = of_device_get_match_data(rcdu->dev);

	platform_set_drvdata(pdev, 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 */
	ddev = drm_dev_alloc(&rcar_du_driver, &pdev->dev);
	if (IS_ERR(ddev))
	return PTR_ERR(ddev);

	rcdu->ddev = ddev;
	ddev->dev_private = rcdu;

	ret = rcar_du_modeset_init(rcdu);
	if (ret < 0) {
	if (ret != -EPROBE_DEFER)
	dev_err(&pdev->dev,
	"failed to initialize DRM/KMS (%d)\n", ret);
	goto error;
	}

	ddev->irq_enabled = 1;

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

	DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));

	return 0;

	error:
	rcar_du_remove(pdev);

	return ret;
	}

	static struct platform_driver rcar_du_platform_driver = {
	.probe = rcar_du_probe,
	.remove = rcar_du_remove,
	.driver = {
	.name = "rcar-du",
	.pm = &rcar_du_pm_ops,
	.of_match_table = rcar_du_of_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");