[linux-block.git] / drivers / gpu / drm / mxsfb / mxsfb_drv.c

// 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");
Commit	Line	Data
c942fddf	1	// SPDX-License-Identifier: GPL-2.0-or-later
45d59d70 MV	2	/*
	3	* Copyright (C) 2016 Marek Vasut <marex@denx.de>
	4	*
	5	* This code is based on drivers/video/fbdev/mxsfb.c :
	6	* Copyright (C) 2010 Juergen Beisert, Pengutronix
	7	* Copyright (C) 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
	8	* Copyright (C) 2008 Embedded Alley Solutions, Inc All Rights Reserved.
45d59d70 MV	9	*/
45d59d70 MV	10
45d59d70 MV	11	#include <linux/clk.h>
45d59d70 MV	12	#include <linux/component.h>
d5742c6c	13	#include <linux/dma-mapping.h>
45d59d70	14	#include <linux/list.h>
d5742c6c	15	#include <linux/module.h>
45d59d70 MV	16	#include <linux/of_device.h>
	17	#include <linux/of_graph.h>
	18	#include <linux/of_reserved_mem.h>
	19	#include <linux/pm_runtime.h>
52791eee	20	#include <linux/dma-resv.h>
d5742c6c	21	#include <linux/spinlock.h>
45d59d70	22
45d59d70 MV	23	#include <drm/drm_atomic.h>
	24	#include <drm/drm_atomic_helper.h>
	25	#include <drm/drm_crtc.h>
d5742c6c	26	#include <drm/drm_drv.h>
45d59d70	27	#include <drm/drm_fb_cma_helper.h>
d5742c6c	28	#include <drm/drm_fb_helper.h>
45d59d70	29	#include <drm/drm_gem_cma_helper.h>
98f3eac5	30	#include <drm/drm_gem_framebuffer_helper.h>
d5742c6c	31	#include <drm/drm_irq.h>
45d59d70 MV	32	#include <drm/drm_of.h>
45d59d70 MV	33	#include <drm/drm_panel.h>
fcd70cd3	34	#include <drm/drm_probe_helper.h>
45d59d70	35	#include <drm/drm_simple_kms_helper.h>
d5742c6c	36	#include <drm/drm_vblank.h>
45d59d70 MV	37
	38	#include "mxsfb_drv.h"
	39	#include "mxsfb_regs.h"
	40
	41	enum mxsfb_devtype {
	42	MXSFB_V3,
	43	MXSFB_V4,
	44	};
	45
	46	static const struct mxsfb_devdata mxsfb_devdata[] = {
	47	[MXSFB_V3] = {
	48	.transfer_count = LCDC_V3_TRANSFER_COUNT,
	49	.cur_buf = LCDC_V3_CUR_BUF,
	50	.next_buf = LCDC_V3_NEXT_BUF,
	51	.debug0 = LCDC_V3_DEBUG0,
	52	.hs_wdth_mask = 0xff,
	53	.hs_wdth_shift = 24,
	54	.ipversion = 3,
	55	},
	56	[MXSFB_V4] = {
	57	.transfer_count = LCDC_V4_TRANSFER_COUNT,
	58	.cur_buf = LCDC_V4_CUR_BUF,
	59	.next_buf = LCDC_V4_NEXT_BUF,
	60	.debug0 = LCDC_V4_DEBUG0,
	61	.hs_wdth_mask = 0x3fff,
	62	.hs_wdth_shift = 18,
	63	.ipversion = 4,
	64	},
	65	};
	66
	67	static const uint32_t mxsfb_formats[] = {
	68	DRM_FORMAT_XRGB8888,
	69	DRM_FORMAT_RGB565
	70	};
	71
	72	static struct mxsfb_drm_private *
	73	drm_pipe_to_mxsfb_drm_private(struct drm_simple_display_pipe *pipe)
	74	{
	75	return container_of(pipe, struct mxsfb_drm_private, pipe);
	76	}
	77
	78	void mxsfb_enable_axi_clk(struct mxsfb_drm_private *mxsfb)
	79	{
	80	if (mxsfb->clk_axi)
	81	clk_prepare_enable(mxsfb->clk_axi);
	82	}
	83
	84	void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb)
	85	{
	86	if (mxsfb->clk_axi)
	87	clk_disable_unprepare(mxsfb->clk_axi);
	88	}
	89
	90	static const struct drm_mode_config_funcs mxsfb_mode_config_funcs = {
98f3eac5	91	.fb_create = drm_gem_fb_create,
45d59d70 MV	92	.atomic_check = drm_atomic_helper_check,
	93	.atomic_commit = drm_atomic_helper_commit,
	94	};
	95
9f19fd3b LC	96	static const struct drm_mode_config_helper_funcs mxsfb_mode_config_helpers = {
	97	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
	98	};
	99
45d59d70	100	static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe,
0c9c7fd0 VS	101	struct drm_crtc_state *crtc_state,
0c9c7fd0 VS	102	struct drm_plane_state *plane_state)
45d59d70 MV	103	{
45d59d70 MV	104	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
4201f4e8	105	struct drm_device *drm = pipe->plane.dev;
45d59d70	106
4201f4e8	107	pm_runtime_get_sync(drm->dev);
3f81e134	108	drm_panel_prepare(mxsfb->panel);
45d59d70	109	mxsfb_crtc_enable(mxsfb);
3f81e134	110	drm_panel_enable(mxsfb->panel);
45d59d70 MV	111	}
	112
	113	static void mxsfb_pipe_disable(struct drm_simple_display_pipe *pipe)
	114	{
	115	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
4201f4e8	116	struct drm_device *drm = pipe->plane.dev;
9f19fd3b LC	117	struct drm_crtc *crtc = &pipe->crtc;
9f19fd3b LC	118	struct drm_pending_vblank_event *event;
45d59d70	119
3f81e134	120	drm_panel_disable(mxsfb->panel);
45d59d70	121	mxsfb_crtc_disable(mxsfb);
3f81e134	122	drm_panel_unprepare(mxsfb->panel);
4201f4e8	123	pm_runtime_put_sync(drm->dev);
9f19fd3b LC	124
	125	spin_lock_irq(&drm->event_lock);
	126	event = crtc->state->event;
	127	if (event) {
	128	crtc->state->event = NULL;
	129	drm_crtc_send_vblank_event(crtc, event);
	130	}
	131	spin_unlock_irq(&drm->event_lock);
45d59d70 MV	132	}
	133
	134	static void mxsfb_pipe_update(struct drm_simple_display_pipe *pipe,
	135	struct drm_plane_state *plane_state)
	136	{
	137	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
	138
	139	mxsfb_plane_atomic_update(mxsfb, plane_state);
	140	}
	141
989c48e6 OA	142	static int mxsfb_pipe_enable_vblank(struct drm_simple_display_pipe *pipe)
	143	{
	144	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
	145
	146	/* Clear and enable VBLANK IRQ */
	147	mxsfb_enable_axi_clk(mxsfb);
	148	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
	149	writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_SET);
	150	mxsfb_disable_axi_clk(mxsfb);
	151
	152	return 0;
	153	}
	154
	155	static void mxsfb_pipe_disable_vblank(struct drm_simple_display_pipe *pipe)
	156	{
	157	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
	158
	159	/* Disable and clear VBLANK IRQ */
	160	mxsfb_enable_axi_clk(mxsfb);
	161	writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_CLR);
	162	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
	163	mxsfb_disable_axi_clk(mxsfb);
	164	}
	165
c5a82814	166	static struct drm_simple_display_pipe_funcs mxsfb_funcs = {
45d59d70 MV	167	.enable = mxsfb_pipe_enable,
	168	.disable = mxsfb_pipe_disable,
	169	.update = mxsfb_pipe_update,
244cb3dd	170	.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
989c48e6 OA	171	.enable_vblank = mxsfb_pipe_enable_vblank,
989c48e6 OA	172	.disable_vblank = mxsfb_pipe_disable_vblank,
45d59d70 MV	173	};
	174
	175	static int mxsfb_load(struct drm_device *drm, unsigned long flags)
	176	{
	177	struct platform_device *pdev = to_platform_device(drm->dev);
	178	struct mxsfb_drm_private *mxsfb;
	179	struct resource *res;
	180	int ret;
	181
	182	mxsfb = devm_kzalloc(&pdev->dev, sizeof(*mxsfb), GFP_KERNEL);
	183	if (!mxsfb)
	184	return -ENOMEM;
	185
	186	drm->dev_private = mxsfb;
	187	mxsfb->devdata = &mxsfb_devdata[pdev->id_entry->driver_data];
	188
	189	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	190	mxsfb->base = devm_ioremap_resource(drm->dev, res);
	191	if (IS_ERR(mxsfb->base))
	192	return PTR_ERR(mxsfb->base);
	193
	194	mxsfb->clk = devm_clk_get(drm->dev, NULL);
	195	if (IS_ERR(mxsfb->clk))
	196	return PTR_ERR(mxsfb->clk);
	197
	198	mxsfb->clk_axi = devm_clk_get(drm->dev, "axi");
	199	if (IS_ERR(mxsfb->clk_axi))
	200	mxsfb->clk_axi = NULL;
	201
	202	mxsfb->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi");
	203	if (IS_ERR(mxsfb->clk_disp_axi))
	204	mxsfb->clk_disp_axi = NULL;
	205
	206	ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32));
	207	if (ret)
	208	return ret;
	209
	210	pm_runtime_enable(drm->dev);
	211
	212	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
	213	if (ret < 0) {
	214	dev_err(drm->dev, "Failed to initialise vblank\n");
	215	goto err_vblank;
	216	}
	217
	218	/* Modeset init */
	219	drm_mode_config_init(drm);
	220
	221	ret = mxsfb_create_output(drm);
	222	if (ret < 0) {
	223	dev_err(drm->dev, "Failed to create outputs\n");
	224	goto err_vblank;
	225	}
	226
	227	ret = drm_simple_display_pipe_init(drm, &mxsfb->pipe, &mxsfb_funcs,
e6fc3b68	228	mxsfb_formats, ARRAY_SIZE(mxsfb_formats), NULL,
45d59d70 MV	229	&mxsfb->connector);
	230	if (ret < 0) {
	231	dev_err(drm->dev, "Cannot setup simple display pipe\n");
	232	goto err_vblank;
	233	}
	234
	235	ret = drm_panel_attach(mxsfb->panel, &mxsfb->connector);
	236	if (ret) {
	237	dev_err(drm->dev, "Cannot connect panel\n");
	238	goto err_vblank;
	239	}
	240
	241	drm->mode_config.min_width = MXSFB_MIN_XRES;
	242	drm->mode_config.min_height = MXSFB_MIN_YRES;
	243	drm->mode_config.max_width = MXSFB_MAX_XRES;
	244	drm->mode_config.max_height = MXSFB_MAX_YRES;
	245	drm->mode_config.funcs = &mxsfb_mode_config_funcs;
9f19fd3b	246	drm->mode_config.helper_private = &mxsfb_mode_config_helpers;
45d59d70 MV	247
	248	drm_mode_config_reset(drm);
	249
	250	pm_runtime_get_sync(drm->dev);
	251	ret = drm_irq_install(drm, platform_get_irq(pdev, 0));
	252	pm_runtime_put_sync(drm->dev);
	253
	254	if (ret < 0) {
	255	dev_err(drm->dev, "Failed to install IRQ handler\n");
	256	goto err_irq;
	257	}
	258
	259	drm_kms_helper_poll_init(drm);
	260
45d59d70 MV	261	platform_set_drvdata(pdev, drm);
	262
	263	drm_helper_hpd_irq_event(drm);
	264
	265	return 0;
	266
45d59d70 MV	267	err_irq:
	268	drm_panel_detach(mxsfb->panel);
	269	err_vblank:
	270	pm_runtime_disable(drm->dev);
	271
	272	return ret;
	273	}
	274
	275	static void mxsfb_unload(struct drm_device *drm)
	276	{
45d59d70 MV	277	drm_kms_helper_poll_fini(drm);
45d59d70 MV	278	drm_mode_config_cleanup(drm);
45d59d70 MV	279
	280	pm_runtime_get_sync(drm->dev);
	281	drm_irq_uninstall(drm);
	282	pm_runtime_put_sync(drm->dev);
	283
	284	drm->dev_private = NULL;
	285
	286	pm_runtime_disable(drm->dev);
	287	}
	288
989c48e6	289	static void mxsfb_irq_preinstall(struct drm_device *drm)
45d59d70 MV	290	{
	291	struct mxsfb_drm_private *mxsfb = drm->dev_private;
	292
989c48e6	293	mxsfb_pipe_disable_vblank(&mxsfb->pipe);
45d59d70 MV	294	}
	295
	296	static irqreturn_t mxsfb_irq_handler(int irq, void *data)
	297	{
	298	struct drm_device *drm = data;
	299	struct mxsfb_drm_private *mxsfb = drm->dev_private;
	300	u32 reg;
	301
	302	mxsfb_enable_axi_clk(mxsfb);
	303
	304	reg = readl(mxsfb->base + LCDC_CTRL1);
	305
	306	if (reg & CTRL1_CUR_FRAME_DONE_IRQ)
	307	drm_crtc_handle_vblank(&mxsfb->pipe.crtc);
	308
	309	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
	310
	311	mxsfb_disable_axi_clk(mxsfb);
	312
	313	return IRQ_HANDLED;
	314	}
	315
d55f7e5d	316	DEFINE_DRM_GEM_CMA_FOPS(fops);
45d59d70 MV	317
45d59d70 MV	318	static struct drm_driver mxsfb_driver = {
0424fdaf	319	.driver_features = DRIVER_GEM \| DRIVER_MODESET \| DRIVER_ATOMIC,
45d59d70 MV	320	.irq_handler = mxsfb_irq_handler,
	321	.irq_preinstall = mxsfb_irq_preinstall,
	322	.irq_uninstall = mxsfb_irq_preinstall,
572b7bc0	323	.gem_free_object_unlocked = drm_gem_cma_free_object,
45d59d70 MV	324	.gem_vm_ops = &drm_gem_cma_vm_ops,
45d59d70 MV	325	.dumb_create = drm_gem_cma_dumb_create,
45d59d70 MV	326	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
45d59d70 MV	327	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
45d59d70 MV	328	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	329	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	330	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	331	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	332	.gem_prime_mmap = drm_gem_cma_prime_mmap,
	333	.fops = &fops,
	334	.name = "mxsfb-drm",
	335	.desc = "MXSFB Controller DRM",
	336	.date = "20160824",
	337	.major = 1,
	338	.minor = 0,
	339	};
	340
	341	static const struct platform_device_id mxsfb_devtype[] = {
	342	{ .name = "imx23-fb", .driver_data = MXSFB_V3, },
	343	{ .name = "imx28-fb", .driver_data = MXSFB_V4, },
	344	{ .name = "imx6sx-fb", .driver_data = MXSFB_V4, },
	345	{ /* sentinel */ }
	346	};
	347	MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
	348
	349	static const struct of_device_id mxsfb_dt_ids[] = {
	350	{ .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devtype[0], },
	351	{ .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devtype[1], },
	352	{ .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devtype[2], },
	353	{ /* sentinel */ }
	354	};
	355	MODULE_DEVICE_TABLE(of, mxsfb_dt_ids);
	356
	357	static int mxsfb_probe(struct platform_device *pdev)
	358	{
	359	struct drm_device *drm;
	360	const struct of_device_id *of_id =
	361	of_match_device(mxsfb_dt_ids, &pdev->dev);
	362	int ret;
	363
	364	if (!pdev->dev.of_node)
	365	return -ENODEV;
	366
	367	if (of_id)
	368	pdev->id_entry = of_id->data;
	369
	370	drm = drm_dev_alloc(&mxsfb_driver, &pdev->dev);
e89e50ac DC	371	if (IS_ERR(drm))
e89e50ac DC	372	return PTR_ERR(drm);
45d59d70 MV	373
	374	ret = mxsfb_load(drm, 0);
	375	if (ret)
	376	goto err_free;
	377
	378	ret = drm_dev_register(drm, 0);
	379	if (ret)
	380	goto err_unload;
	381
8e93f102 NT	382	drm_fbdev_generic_setup(drm, 32);
8e93f102 NT	383
45d59d70 MV	384	return 0;
	385
	386	err_unload:
	387	mxsfb_unload(drm);
	388	err_free:
808bad32	389	drm_dev_put(drm);
45d59d70 MV	390
	391	return ret;
	392	}
	393
	394	static int mxsfb_remove(struct platform_device *pdev)
	395	{
	396	struct drm_device *drm = platform_get_drvdata(pdev);
	397
	398	drm_dev_unregister(drm);
	399	mxsfb_unload(drm);
808bad32	400	drm_dev_put(drm);
45d59d70 MV	401
	402	return 0;
	403	}
	404
f0525a1c LC	405	#ifdef CONFIG_PM_SLEEP
	406	static int mxsfb_suspend(struct device *dev)
	407	{
	408	struct drm_device *drm = dev_get_drvdata(dev);
	409
	410	return drm_mode_config_helper_suspend(drm);
	411	}
	412
	413	static int mxsfb_resume(struct device *dev)
	414	{
	415	struct drm_device *drm = dev_get_drvdata(dev);
	416
	417	return drm_mode_config_helper_resume(drm);
	418	}
	419	#endif
	420
	421	static const struct dev_pm_ops mxsfb_pm_ops = {
	422	SET_SYSTEM_SLEEP_PM_OPS(mxsfb_suspend, mxsfb_resume)
	423	};
	424
45d59d70 MV	425	static struct platform_driver mxsfb_platform_driver = {
	426	.probe = mxsfb_probe,
	427	.remove = mxsfb_remove,
	428	.id_table = mxsfb_devtype,
	429	.driver = {
	430	.name = "mxsfb",
	431	.of_match_table = mxsfb_dt_ids,
f0525a1c	432	.pm = &mxsfb_pm_ops,
45d59d70 MV	433	},
	434	};
	435
	436	module_platform_driver(mxsfb_platform_driver);
	437
	438	MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
	439	MODULE_DESCRIPTION("Freescale MXS DRM/KMS driver");
	440	MODULE_LICENSE("GPL");