drivers/gpu/drm/mxsfb/mxsfb_drv.c - linux/torvalds/linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright (C) 2016 Marek Vasut <marex@denx.de>
  *
  * This code is based on drivers/video/fbdev/mxsfb.c :
  * Copyright (C) 2010 Juergen Beisert, Pengutronix
  * Copyright (C) 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
  * Copyright (C) 2008 Embedded Alley Solutions, Inc All Rights Reserved.
  */

 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/dma-mapping.h>
 #include <linux/list.h>
 #include <linux/module.h>
 #include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/of_reserved_mem.h>
 #include <linux/pm_runtime.h>
 #include <linux/dma-resv.h>
 #include <linux/spinlock.h>

 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_fb_cma_helper.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_irq.h>
 #include <drm/drm_of.h>
 #include <drm/drm_panel.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_simple_kms_helper.h>
 #include <drm/drm_vblank.h>

 #include "mxsfb_drv.h"
 #include "mxsfb_regs.h"

 enum mxsfb_devtype {
 	MXSFB_V3,
 	MXSFB_V4,
 };

 static const struct mxsfb_devdata mxsfb_devdata[] = {
 	[MXSFB_V3] = {
 		.transfer_count	= LCDC_V3_TRANSFER_COUNT,
 		.cur_buf	= LCDC_V3_CUR_BUF,
 		.next_buf	= LCDC_V3_NEXT_BUF,
 		.debug0		= LCDC_V3_DEBUG0,
 		.hs_wdth_mask	= 0xff,
 		.hs_wdth_shift	= 24,
 		.ipversion	= 3,
 	},
 	[MXSFB_V4] = {
 		.transfer_count	= LCDC_V4_TRANSFER_COUNT,
 		.cur_buf	= LCDC_V4_CUR_BUF,
 		.next_buf	= LCDC_V4_NEXT_BUF,
 		.debug0		= LCDC_V4_DEBUG0,
 		.hs_wdth_mask	= 0x3fff,
 		.hs_wdth_shift	= 18,
 		.ipversion	= 4,
 	},
 };

 static const uint32_t mxsfb_formats[] = {
 	DRM_FORMAT_XRGB8888,
 	DRM_FORMAT_RGB565
 };

 static struct mxsfb_drm_private *
 drm_pipe_to_mxsfb_drm_private(struct drm_simple_display_pipe *pipe)
 {
 	return container_of(pipe, struct mxsfb_drm_private, pipe);
 }

 void mxsfb_enable_axi_clk(struct mxsfb_drm_private *mxsfb)
 {
 	if (mxsfb->clk_axi)
 		clk_prepare_enable(mxsfb->clk_axi);
 }

 void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb)
 {
 	if (mxsfb->clk_axi)
 		clk_disable_unprepare(mxsfb->clk_axi);
 }

 static const struct drm_mode_config_funcs mxsfb_mode_config_funcs = {
 	.fb_create		= drm_gem_fb_create,
 	.atomic_check		= drm_atomic_helper_check,
 	.atomic_commit		= drm_atomic_helper_commit,
 };

 static const struct drm_mode_config_helper_funcs mxsfb_mode_config_helpers = {
 	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
 };

 static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe,
 			      struct drm_crtc_state *crtc_state,
 			      struct drm_plane_state *plane_state)
 {
 	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
 	struct drm_device *drm = pipe->plane.dev;

 	pm_runtime_get_sync(drm->dev);
 	drm_panel_prepare(mxsfb->panel);
 	mxsfb_crtc_enable(mxsfb);
 	drm_panel_enable(mxsfb->panel);
 }

 static void mxsfb_pipe_disable(struct drm_simple_display_pipe *pipe)
 {
 	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
 	struct drm_device *drm = pipe->plane.dev;
 	struct drm_crtc *crtc = &pipe->crtc;
 	struct drm_pending_vblank_event *event;

 	drm_panel_disable(mxsfb->panel);
 	mxsfb_crtc_disable(mxsfb);
 	drm_panel_unprepare(mxsfb->panel);
 	pm_runtime_put_sync(drm->dev);

 	spin_lock_irq(&drm->event_lock);
 	event = crtc->state->event;
 	if (event) {
 		crtc->state->event = NULL;
 		drm_crtc_send_vblank_event(crtc, event);
 	}
 	spin_unlock_irq(&drm->event_lock);
 }

 static void mxsfb_pipe_update(struct drm_simple_display_pipe *pipe,
 			      struct drm_plane_state *plane_state)
 {
 	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);

 	mxsfb_plane_atomic_update(mxsfb, plane_state);
 }

 static int mxsfb_pipe_enable_vblank(struct drm_simple_display_pipe *pipe)
 {
 	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);

 	/* Clear and enable VBLANK IRQ */
 	mxsfb_enable_axi_clk(mxsfb);
 	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
 	writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_SET);
 	mxsfb_disable_axi_clk(mxsfb);

 	return 0;
 }

 static void mxsfb_pipe_disable_vblank(struct drm_simple_display_pipe *pipe)
 {
 	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);

 	/* Disable and clear VBLANK IRQ */
 	mxsfb_enable_axi_clk(mxsfb);
 	writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_CLR);
 	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
 	mxsfb_disable_axi_clk(mxsfb);
 }

 static struct drm_simple_display_pipe_funcs mxsfb_funcs = {
 	.enable		= mxsfb_pipe_enable,
 	.disable	= mxsfb_pipe_disable,
 	.update		= mxsfb_pipe_update,
 	.prepare_fb	= drm_gem_fb_simple_display_pipe_prepare_fb,
 	.enable_vblank	= mxsfb_pipe_enable_vblank,
 	.disable_vblank	= mxsfb_pipe_disable_vblank,
 };

 static int mxsfb_load(struct drm_device *drm, unsigned long flags)
 {
 	struct platform_device *pdev = to_platform_device(drm->dev);
 	struct mxsfb_drm_private *mxsfb;
 	struct resource *res;
 	int ret;

 	mxsfb = devm_kzalloc(&pdev->dev, sizeof(*mxsfb), GFP_KERNEL);
 	if (!mxsfb)
 		return -ENOMEM;

 	drm->dev_private = mxsfb;
 	mxsfb->devdata = &mxsfb_devdata[pdev->id_entry->driver_data];

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	mxsfb->base = devm_ioremap_resource(drm->dev, res);
 	if (IS_ERR(mxsfb->base))
 		return PTR_ERR(mxsfb->base);

 	mxsfb->clk = devm_clk_get(drm->dev, NULL);
 	if (IS_ERR(mxsfb->clk))
 		return PTR_ERR(mxsfb->clk);

 	mxsfb->clk_axi = devm_clk_get(drm->dev, "axi");
 	if (IS_ERR(mxsfb->clk_axi))
 		mxsfb->clk_axi = NULL;

 	mxsfb->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi");
 	if (IS_ERR(mxsfb->clk_disp_axi))
 		mxsfb->clk_disp_axi = NULL;

 	ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32));
 	if (ret)
 		return ret;

 	pm_runtime_enable(drm->dev);

 	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 	if (ret < 0) {
 		dev_err(drm->dev, "Failed to initialise vblank\n");
 		goto err_vblank;
 	}

 	/* Modeset init */
 	drm_mode_config_init(drm);

 	ret = mxsfb_create_output(drm);
 	if (ret < 0) {
 		dev_err(drm->dev, "Failed to create outputs\n");
 		goto err_vblank;
 	}

 	ret = drm_simple_display_pipe_init(drm, &mxsfb->pipe, &mxsfb_funcs,
 			mxsfb_formats, ARRAY_SIZE(mxsfb_formats), NULL,
 			&mxsfb->connector);
 	if (ret < 0) {
 		dev_err(drm->dev, "Cannot setup simple display pipe\n");
 		goto err_vblank;
 	}

 	ret = drm_panel_attach(mxsfb->panel, &mxsfb->connector);
 	if (ret) {
 		dev_err(drm->dev, "Cannot connect panel\n");
 		goto err_vblank;
 	}

 	drm->mode_config.min_width	= MXSFB_MIN_XRES;
 	drm->mode_config.min_height	= MXSFB_MIN_YRES;
 	drm->mode_config.max_width	= MXSFB_MAX_XRES;
 	drm->mode_config.max_height	= MXSFB_MAX_YRES;
 	drm->mode_config.funcs		= &mxsfb_mode_config_funcs;
 	drm->mode_config.helper_private	= &mxsfb_mode_config_helpers;

 	drm_mode_config_reset(drm);

 	pm_runtime_get_sync(drm->dev);
 	ret = drm_irq_install(drm, platform_get_irq(pdev, 0));
 	pm_runtime_put_sync(drm->dev);

 	if (ret < 0) {
 		dev_err(drm->dev, "Failed to install IRQ handler\n");
 		goto err_irq;
 	}

 	drm_kms_helper_poll_init(drm);

 	platform_set_drvdata(pdev, drm);

 	drm_helper_hpd_irq_event(drm);

 	return 0;

 err_irq:
 	drm_panel_detach(mxsfb->panel);
 err_vblank:
 	pm_runtime_disable(drm->dev);

 	return ret;
 }

 static void mxsfb_unload(struct drm_device *drm)
 {
 	drm_kms_helper_poll_fini(drm);
 	drm_mode_config_cleanup(drm);

 	pm_runtime_get_sync(drm->dev);
 	drm_irq_uninstall(drm);
 	pm_runtime_put_sync(drm->dev);

 	drm->dev_private = NULL;

 	pm_runtime_disable(drm->dev);
 }

 static void mxsfb_irq_preinstall(struct drm_device *drm)
 {
 	struct mxsfb_drm_private *mxsfb = drm->dev_private;

 	mxsfb_pipe_disable_vblank(&mxsfb->pipe);
 }

 static irqreturn_t mxsfb_irq_handler(int irq, void *data)
 {
 	struct drm_device *drm = data;
 	struct mxsfb_drm_private *mxsfb = drm->dev_private;
 	u32 reg;

 	mxsfb_enable_axi_clk(mxsfb);

 	reg = readl(mxsfb->base + LCDC_CTRL1);

 	if (reg & CTRL1_CUR_FRAME_DONE_IRQ)
 		drm_crtc_handle_vblank(&mxsfb->pipe.crtc);

 	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);

 	mxsfb_disable_axi_clk(mxsfb);

 	return IRQ_HANDLED;
 }

 DEFINE_DRM_GEM_CMA_FOPS(fops);

 static struct drm_driver mxsfb_driver = {
 	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 	.irq_handler		= mxsfb_irq_handler,
 	.irq_preinstall		= mxsfb_irq_preinstall,
 	.irq_uninstall		= mxsfb_irq_preinstall,
 	.gem_free_object_unlocked = drm_gem_cma_free_object,
 	.gem_vm_ops		= &drm_gem_cma_vm_ops,
 	.dumb_create		= drm_gem_cma_dumb_create,
 	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
 	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
 	.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,
 	.fops	= &fops,
 	.name	= "mxsfb-drm",
 	.desc	= "MXSFB Controller DRM",
 	.date	= "20160824",
 	.major	= 1,
 	.minor	= 0,
 };

 static const struct platform_device_id mxsfb_devtype[] = {
 	{ .name = "imx23-fb", .driver_data = MXSFB_V3, },
 	{ .name = "imx28-fb", .driver_data = MXSFB_V4, },
 	{ .name = "imx6sx-fb", .driver_data = MXSFB_V4, },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(platform, mxsfb_devtype);

 static const struct of_device_id mxsfb_dt_ids[] = {
 	{ .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devtype[0], },
 	{ .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devtype[1], },
 	{ .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devtype[2], },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, mxsfb_dt_ids);

 static int mxsfb_probe(struct platform_device *pdev)
 {
 	struct drm_device *drm;
 	const struct of_device_id *of_id =
 			of_match_device(mxsfb_dt_ids, &pdev->dev);
 	int ret;

 	if (!pdev->dev.of_node)
 		return -ENODEV;

 	if (of_id)
 		pdev->id_entry = of_id->data;

 	drm = drm_dev_alloc(&mxsfb_driver, &pdev->dev);
 	if (IS_ERR(drm))
 		return PTR_ERR(drm);

 	ret = mxsfb_load(drm, 0);
 	if (ret)
 		goto err_free;

 	ret = drm_dev_register(drm, 0);
 	if (ret)
 		goto err_unload;

 	drm_fbdev_generic_setup(drm, 32);

 	return 0;

 err_unload:
 	mxsfb_unload(drm);
 err_free:
 	drm_dev_put(drm);

 	return ret;
 }

 static int mxsfb_remove(struct platform_device *pdev)
 {
 	struct drm_device *drm = platform_get_drvdata(pdev);

 	drm_dev_unregister(drm);
 	mxsfb_unload(drm);
 	drm_dev_put(drm);

 	return 0;
 }

 #ifdef CONFIG_PM_SLEEP
 static int mxsfb_suspend(struct device *dev)
 {
 	struct drm_device *drm = dev_get_drvdata(dev);

 	return drm_mode_config_helper_suspend(drm);
 }

 static int mxsfb_resume(struct device *dev)
 {
 	struct drm_device *drm = dev_get_drvdata(dev);

 	return drm_mode_config_helper_resume(drm);
 }
 #endif

 static const struct dev_pm_ops mxsfb_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(mxsfb_suspend, mxsfb_resume)
 };

 static struct platform_driver mxsfb_platform_driver = {
 	.probe		= mxsfb_probe,
 	.remove		= mxsfb_remove,
 	.id_table	= mxsfb_devtype,
 	.driver	= {
 		.name		= "mxsfb",
 		.of_match_table	= mxsfb_dt_ids,
 		.pm		= &mxsfb_pm_ops,
 	},
 };

 module_platform_driver(mxsfb_platform_driver);

 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
 MODULE_DESCRIPTION("Freescale MXS DRM/KMS driver");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Copyright (C) 2016 Marek Vasut <marex@denx.de>
	*
	* This code is based on drivers/video/fbdev/mxsfb.c :
	* Copyright (C) 2010 Juergen Beisert, Pengutronix
	* Copyright (C) 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
	* Copyright (C) 2008 Embedded Alley Solutions, Inc All Rights Reserved.
	*/

	#include <linux/clk.h>
	#include <linux/component.h>
	#include <linux/dma-mapping.h>
	#include <linux/list.h>
	#include <linux/module.h>
	#include <linux/of_device.h>
	#include <linux/of_graph.h>
	#include <linux/of_reserved_mem.h>
	#include <linux/pm_runtime.h>
	#include <linux/dma-resv.h>
	#include <linux/spinlock.h>

	#include <drm/drm_atomic.h>
	#include <drm/drm_atomic_helper.h>
	#include <drm/drm_crtc.h>
	#include <drm/drm_drv.h>
	#include <drm/drm_fb_cma_helper.h>
	#include <drm/drm_fb_helper.h>
	#include <drm/drm_gem_cma_helper.h>
	#include <drm/drm_gem_framebuffer_helper.h>
	#include <drm/drm_irq.h>
	#include <drm/drm_of.h>
	#include <drm/drm_panel.h>
	#include <drm/drm_probe_helper.h>
	#include <drm/drm_simple_kms_helper.h>
	#include <drm/drm_vblank.h>

	#include "mxsfb_drv.h"
	#include "mxsfb_regs.h"

	enum mxsfb_devtype {
	MXSFB_V3,
	MXSFB_V4,
	};

	static const struct mxsfb_devdata mxsfb_devdata[] = {
	[MXSFB_V3] = {
	.transfer_count = LCDC_V3_TRANSFER_COUNT,
	.cur_buf = LCDC_V3_CUR_BUF,
	.next_buf = LCDC_V3_NEXT_BUF,
	.debug0 = LCDC_V3_DEBUG0,
	.hs_wdth_mask = 0xff,
	.hs_wdth_shift = 24,
	.ipversion = 3,
	},
	[MXSFB_V4] = {
	.transfer_count = LCDC_V4_TRANSFER_COUNT,
	.cur_buf = LCDC_V4_CUR_BUF,
	.next_buf = LCDC_V4_NEXT_BUF,
	.debug0 = LCDC_V4_DEBUG0,
	.hs_wdth_mask = 0x3fff,
	.hs_wdth_shift = 18,
	.ipversion = 4,
	},
	};

	static const uint32_t mxsfb_formats[] = {
	DRM_FORMAT_XRGB8888,
	DRM_FORMAT_RGB565
	};

	static struct mxsfb_drm_private *
	drm_pipe_to_mxsfb_drm_private(struct drm_simple_display_pipe *pipe)
	{
	return container_of(pipe, struct mxsfb_drm_private, pipe);
	}

	void mxsfb_enable_axi_clk(struct mxsfb_drm_private *mxsfb)
	{
	if (mxsfb->clk_axi)
	clk_prepare_enable(mxsfb->clk_axi);
	}

	void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb)
	{
	if (mxsfb->clk_axi)
	clk_disable_unprepare(mxsfb->clk_axi);
	}

	static const struct drm_mode_config_funcs mxsfb_mode_config_funcs = {
	.fb_create = drm_gem_fb_create,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = drm_atomic_helper_commit,
	};

	static const struct drm_mode_config_helper_funcs mxsfb_mode_config_helpers = {
	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
	};

	static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe,
	struct drm_crtc_state *crtc_state,
	struct drm_plane_state *plane_state)
	{
	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
	struct drm_device *drm = pipe->plane.dev;

	pm_runtime_get_sync(drm->dev);
	drm_panel_prepare(mxsfb->panel);
	mxsfb_crtc_enable(mxsfb);
	drm_panel_enable(mxsfb->panel);
	}

	static void mxsfb_pipe_disable(struct drm_simple_display_pipe *pipe)
	{
	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
	struct drm_device *drm = pipe->plane.dev;
	struct drm_crtc *crtc = &pipe->crtc;
	struct drm_pending_vblank_event *event;

	drm_panel_disable(mxsfb->panel);
	mxsfb_crtc_disable(mxsfb);
	drm_panel_unprepare(mxsfb->panel);
	pm_runtime_put_sync(drm->dev);

	spin_lock_irq(&drm->event_lock);
	event = crtc->state->event;
	if (event) {
	crtc->state->event = NULL;
	drm_crtc_send_vblank_event(crtc, event);
	}
	spin_unlock_irq(&drm->event_lock);
	}

	static void mxsfb_pipe_update(struct drm_simple_display_pipe *pipe,
	struct drm_plane_state *plane_state)
	{
	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);

	mxsfb_plane_atomic_update(mxsfb, plane_state);
	}

	static int mxsfb_pipe_enable_vblank(struct drm_simple_display_pipe *pipe)
	{
	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);

	/* Clear and enable VBLANK IRQ */
	mxsfb_enable_axi_clk(mxsfb);
	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
	writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_SET);
	mxsfb_disable_axi_clk(mxsfb);

	return 0;
	}

	static void mxsfb_pipe_disable_vblank(struct drm_simple_display_pipe *pipe)
	{
	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);

	/* Disable and clear VBLANK IRQ */
	mxsfb_enable_axi_clk(mxsfb);
	writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_CLR);
	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
	mxsfb_disable_axi_clk(mxsfb);
	}

	static struct drm_simple_display_pipe_funcs mxsfb_funcs = {
	.enable = mxsfb_pipe_enable,
	.disable = mxsfb_pipe_disable,
	.update = mxsfb_pipe_update,
	.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
	.enable_vblank = mxsfb_pipe_enable_vblank,
	.disable_vblank = mxsfb_pipe_disable_vblank,
	};

	static int mxsfb_load(struct drm_device *drm, unsigned long flags)
	{
	struct platform_device *pdev = to_platform_device(drm->dev);
	struct mxsfb_drm_private *mxsfb;
	struct resource *res;
	int ret;

	mxsfb = devm_kzalloc(&pdev->dev, sizeof(*mxsfb), GFP_KERNEL);
	if (!mxsfb)
	return -ENOMEM;

	drm->dev_private = mxsfb;
	mxsfb->devdata = &mxsfb_devdata[pdev->id_entry->driver_data];

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	mxsfb->base = devm_ioremap_resource(drm->dev, res);
	if (IS_ERR(mxsfb->base))
	return PTR_ERR(mxsfb->base);

	mxsfb->clk = devm_clk_get(drm->dev, NULL);
	if (IS_ERR(mxsfb->clk))
	return PTR_ERR(mxsfb->clk);

	mxsfb->clk_axi = devm_clk_get(drm->dev, "axi");
	if (IS_ERR(mxsfb->clk_axi))
	mxsfb->clk_axi = NULL;

	mxsfb->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi");
	if (IS_ERR(mxsfb->clk_disp_axi))
	mxsfb->clk_disp_axi = NULL;

	ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32));
	if (ret)
	return ret;

	pm_runtime_enable(drm->dev);

	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
	if (ret < 0) {
	dev_err(drm->dev, "Failed to initialise vblank\n");
	goto err_vblank;
	}

	/* Modeset init */
	drm_mode_config_init(drm);

	ret = mxsfb_create_output(drm);
	if (ret < 0) {
	dev_err(drm->dev, "Failed to create outputs\n");
	goto err_vblank;
	}

	ret = drm_simple_display_pipe_init(drm, &mxsfb->pipe, &mxsfb_funcs,
	mxsfb_formats, ARRAY_SIZE(mxsfb_formats), NULL,
	&mxsfb->connector);
	if (ret < 0) {
	dev_err(drm->dev, "Cannot setup simple display pipe\n");
	goto err_vblank;
	}

	ret = drm_panel_attach(mxsfb->panel, &mxsfb->connector);
	if (ret) {
	dev_err(drm->dev, "Cannot connect panel\n");
	goto err_vblank;
	}

	drm->mode_config.min_width = MXSFB_MIN_XRES;
	drm->mode_config.min_height = MXSFB_MIN_YRES;
	drm->mode_config.max_width = MXSFB_MAX_XRES;
	drm->mode_config.max_height = MXSFB_MAX_YRES;
	drm->mode_config.funcs = &mxsfb_mode_config_funcs;
	drm->mode_config.helper_private = &mxsfb_mode_config_helpers;

	drm_mode_config_reset(drm);

	pm_runtime_get_sync(drm->dev);
	ret = drm_irq_install(drm, platform_get_irq(pdev, 0));
	pm_runtime_put_sync(drm->dev);

	if (ret < 0) {
	dev_err(drm->dev, "Failed to install IRQ handler\n");
	goto err_irq;
	}

	drm_kms_helper_poll_init(drm);

	platform_set_drvdata(pdev, drm);

	drm_helper_hpd_irq_event(drm);

	return 0;

	err_irq:
	drm_panel_detach(mxsfb->panel);
	err_vblank:
	pm_runtime_disable(drm->dev);

	return ret;
	}

	static void mxsfb_unload(struct drm_device *drm)
	{
	drm_kms_helper_poll_fini(drm);
	drm_mode_config_cleanup(drm);

	pm_runtime_get_sync(drm->dev);
	drm_irq_uninstall(drm);
	pm_runtime_put_sync(drm->dev);

	drm->dev_private = NULL;

	pm_runtime_disable(drm->dev);
	}

	static void mxsfb_irq_preinstall(struct drm_device *drm)
	{
	struct mxsfb_drm_private *mxsfb = drm->dev_private;

	mxsfb_pipe_disable_vblank(&mxsfb->pipe);
	}

	static irqreturn_t mxsfb_irq_handler(int irq, void *data)
	{
	struct drm_device *drm = data;
	struct mxsfb_drm_private *mxsfb = drm->dev_private;
	u32 reg;

	mxsfb_enable_axi_clk(mxsfb);

	reg = readl(mxsfb->base + LCDC_CTRL1);

	if (reg & CTRL1_CUR_FRAME_DONE_IRQ)
	drm_crtc_handle_vblank(&mxsfb->pipe.crtc);

	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);

	mxsfb_disable_axi_clk(mxsfb);

	return IRQ_HANDLED;
	}

	DEFINE_DRM_GEM_CMA_FOPS(fops);

	static struct drm_driver mxsfb_driver = {
	.driver_features = DRIVER_GEM \| DRIVER_MODESET \| DRIVER_ATOMIC,
	.irq_handler = mxsfb_irq_handler,
	.irq_preinstall = mxsfb_irq_preinstall,
	.irq_uninstall = mxsfb_irq_preinstall,
	.gem_free_object_unlocked = drm_gem_cma_free_object,
	.gem_vm_ops = &drm_gem_cma_vm_ops,
	.dumb_create = drm_gem_cma_dumb_create,
	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	.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,
	.fops = &fops,
	.name = "mxsfb-drm",
	.desc = "MXSFB Controller DRM",
	.date = "20160824",
	.major = 1,
	.minor = 0,
	};

	static const struct platform_device_id mxsfb_devtype[] = {
	{ .name = "imx23-fb", .driver_data = MXSFB_V3, },
	{ .name = "imx28-fb", .driver_data = MXSFB_V4, },
	{ .name = "imx6sx-fb", .driver_data = MXSFB_V4, },
	{ /* sentinel */ }
	};
	MODULE_DEVICE_TABLE(platform, mxsfb_devtype);

	static const struct of_device_id mxsfb_dt_ids[] = {
	{ .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devtype[0], },
	{ .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devtype[1], },
	{ .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devtype[2], },
	{ /* sentinel */ }
	};
	MODULE_DEVICE_TABLE(of, mxsfb_dt_ids);

	static int mxsfb_probe(struct platform_device *pdev)
	{
	struct drm_device *drm;
	const struct of_device_id *of_id =
	of_match_device(mxsfb_dt_ids, &pdev->dev);
	int ret;

	if (!pdev->dev.of_node)
	return -ENODEV;

	if (of_id)
	pdev->id_entry = of_id->data;

	drm = drm_dev_alloc(&mxsfb_driver, &pdev->dev);
	if (IS_ERR(drm))
	return PTR_ERR(drm);

	ret = mxsfb_load(drm, 0);
	if (ret)
	goto err_free;

	ret = drm_dev_register(drm, 0);
	if (ret)
	goto err_unload;

	drm_fbdev_generic_setup(drm, 32);

	return 0;

	err_unload:
	mxsfb_unload(drm);
	err_free:
	drm_dev_put(drm);

	return ret;
	}

	static int mxsfb_remove(struct platform_device *pdev)
	{
	struct drm_device *drm = platform_get_drvdata(pdev);

	drm_dev_unregister(drm);
	mxsfb_unload(drm);
	drm_dev_put(drm);

	return 0;
	}

	#ifdef CONFIG_PM_SLEEP
	static int mxsfb_suspend(struct device *dev)
	{
	struct drm_device *drm = dev_get_drvdata(dev);

	return drm_mode_config_helper_suspend(drm);
	}

	static int mxsfb_resume(struct device *dev)
	{
	struct drm_device *drm = dev_get_drvdata(dev);

	return drm_mode_config_helper_resume(drm);
	}
	#endif

	static const struct dev_pm_ops mxsfb_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(mxsfb_suspend, mxsfb_resume)
	};

	static struct platform_driver mxsfb_platform_driver = {
	.probe = mxsfb_probe,
	.remove = mxsfb_remove,
	.id_table = mxsfb_devtype,
	.driver = {
	.name = "mxsfb",
	.of_match_table = mxsfb_dt_ids,
	.pm = &mxsfb_pm_ops,
	},
	};

	module_platform_driver(mxsfb_platform_driver);

	MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
	MODULE_DESCRIPTION("Freescale MXS DRM/KMS driver");
	MODULE_LICENSE("GPL");