[mirror_ubuntu-kernels.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/dma-mapping.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>

#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_connector.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_mode_config.h>
#include <drm/drm_of.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>

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

enum mxsfb_devtype {
	MXSFB_V3,
	MXSFB_V4,
	/*
	 * Starting at i.MX6 the hardware version register is gone, use the
	 * i.MX family number as the version.
	 */
	MXSFB_V6,
};

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,
		.hs_wdth_mask	= 0xff,
		.hs_wdth_shift	= 24,
		.has_overlay	= false,
		.has_ctrl2	= false,
	},
	[MXSFB_V4] = {
		.transfer_count	= LCDC_V4_TRANSFER_COUNT,
		.cur_buf	= LCDC_V4_CUR_BUF,
		.next_buf	= LCDC_V4_NEXT_BUF,
		.hs_wdth_mask	= 0x3fff,
		.hs_wdth_shift	= 18,
		.has_overlay	= false,
		.has_ctrl2	= true,
	},
	[MXSFB_V6] = {
		.transfer_count	= LCDC_V4_TRANSFER_COUNT,
		.cur_buf	= LCDC_V4_CUR_BUF,
		.next_buf	= LCDC_V4_NEXT_BUF,
		.hs_wdth_mask	= 0x3fff,
		.hs_wdth_shift	= 18,
		.has_overlay	= true,
		.has_ctrl2	= true,
	},
};

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 struct drm_framebuffer *
mxsfb_fb_create(struct drm_device *dev, struct drm_file *file_priv,
		const struct drm_mode_fb_cmd2 *mode_cmd)
{
	const struct drm_format_info *info;

	info = drm_get_format_info(dev, mode_cmd);
	if (!info)
		return ERR_PTR(-EINVAL);

	if (mode_cmd->width * info->cpp[0] != mode_cmd->pitches[0]) {
		dev_dbg(dev->dev, "Invalid pitch: fb width must match pitch\n");
		return ERR_PTR(-EINVAL);
	}

	return drm_gem_fb_create(dev, file_priv, mode_cmd);
}

static const struct drm_mode_config_funcs mxsfb_mode_config_funcs = {
	.fb_create		= mxsfb_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 int mxsfb_attach_bridge(struct mxsfb_drm_private *mxsfb)
{
	struct drm_device *drm = mxsfb->drm;
	struct drm_connector_list_iter iter;
	struct drm_panel *panel;
	struct drm_bridge *bridge;
	int ret;

	ret = drm_of_find_panel_or_bridge(drm->dev->of_node, 0, 0, &panel,
					  &bridge);
	if (ret)
		return ret;

	if (panel) {
		bridge = devm_drm_panel_bridge_add_typed(drm->dev, panel,
							 DRM_MODE_CONNECTOR_DPI);
		if (IS_ERR(bridge))
			return PTR_ERR(bridge);
	}

	if (!bridge)
		return -ENODEV;

	ret = drm_bridge_attach(&mxsfb->encoder, bridge, NULL, 0);
	if (ret)
		return dev_err_probe(drm->dev, ret, "Failed to attach bridge\n");

	mxsfb->bridge = bridge;

	/*
	 * Get hold of the connector. This is a bit of a hack, until the bridge
	 * API gives us bus flags and formats.
	 */
	drm_connector_list_iter_begin(drm, &iter);
	mxsfb->connector = drm_connector_list_iter_next(&iter);
	drm_connector_list_iter_end(&iter);

	return 0;
}

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;

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

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

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

	return IRQ_HANDLED;
}

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

	mxsfb_enable_axi_clk(mxsfb);

	/* Disable and clear VBLANK IRQ */
	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 int mxsfb_irq_install(struct drm_device *dev, int irq)
{
	if (irq == IRQ_NOTCONNECTED)
		return -ENOTCONN;

	mxsfb_irq_disable(dev);

	return request_irq(irq, mxsfb_irq_handler, 0,  dev->driver->name, dev);
}

static void mxsfb_irq_uninstall(struct drm_device *dev)
{
	struct mxsfb_drm_private *mxsfb = dev->dev_private;

	mxsfb_irq_disable(dev);
	free_irq(mxsfb->irq, dev);
}

static int mxsfb_load(struct drm_device *drm,
		      const struct mxsfb_devdata *devdata)
{
	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;

	mxsfb->drm = drm;
	drm->dev_private = mxsfb;
	mxsfb->devdata = devdata;

	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);

	/* Modeset init */
	drm_mode_config_init(drm);

	ret = mxsfb_kms_init(mxsfb);
	if (ret < 0) {
		dev_err(drm->dev, "Failed to initialize KMS pipeline\n");
		goto err_vblank;
	}

	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;
	}

	/* Start with vertical blanking interrupt reporting disabled. */
	drm_crtc_vblank_off(&mxsfb->crtc);

	ret = mxsfb_attach_bridge(mxsfb);
	if (ret) {
		if (ret != -EPROBE_DEFER)
			dev_err(drm->dev, "Cannot connect bridge: %d\n", ret);
		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);

	ret = platform_get_irq(pdev, 0);
	if (ret < 0)
		goto err_vblank;
	mxsfb->irq = ret;

	pm_runtime_get_sync(drm->dev);
	ret = mxsfb_irq_install(drm, mxsfb->irq);
	pm_runtime_put_sync(drm->dev);

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

	drm_kms_helper_poll_init(drm);

	platform_set_drvdata(pdev, drm);

	drm_helper_hpd_irq_event(drm);

	return 0;

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);
	mxsfb_irq_uninstall(drm);
	pm_runtime_put_sync(drm->dev);

	drm->dev_private = NULL;

	pm_runtime_disable(drm->dev);
}

DEFINE_DRM_GEM_CMA_FOPS(fops);

static const struct drm_driver mxsfb_driver = {
	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
	DRM_GEM_CMA_DRIVER_OPS,
	.fops	= &fops,
	.name	= "mxsfb-drm",
	.desc	= "MXSFB Controller DRM",
	.date	= "20160824",
	.major	= 1,
	.minor	= 0,
};

static const struct of_device_id mxsfb_dt_ids[] = {
	{ .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devdata[MXSFB_V3], },
	{ .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devdata[MXSFB_V4], },
	{ .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devdata[MXSFB_V6], },
	{ /* 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;

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

	ret = mxsfb_load(drm, of_id->data);
	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,
	.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	11	#include <linux/clk.h>
d5742c6c	12	#include <linux/dma-mapping.h>
ae1ed009	13	#include <linux/io.h>
d5742c6c	14	#include <linux/module.h>
45d59d70	15	#include <linux/of_device.h>
ae1ed009	16	#include <linux/platform_device.h>
45d59d70	17	#include <linux/pm_runtime.h>
45d59d70	18
45d59d70	19	#include <drm/drm_atomic_helper.h>
ae1ed009 LP	20	#include <drm/drm_bridge.h>
ae1ed009 LP	21	#include <drm/drm_connector.h>
d5742c6c	22	#include <drm/drm_drv.h>
d5742c6c	23	#include <drm/drm_fb_helper.h>
d5a0c816	24	#include <drm/drm_fourcc.h>
45d59d70	25	#include <drm/drm_gem_cma_helper.h>
98f3eac5	26	#include <drm/drm_gem_framebuffer_helper.h>
ae1ed009	27	#include <drm/drm_mode_config.h>
45d59d70	28	#include <drm/drm_of.h>
fcd70cd3	29	#include <drm/drm_probe_helper.h>
d5742c6c	30	#include <drm/drm_vblank.h>
45d59d70 MV	31
	32	#include "mxsfb_drv.h"
	33	#include "mxsfb_regs.h"
	34
	35	enum mxsfb_devtype {
	36	MXSFB_V3,
	37	MXSFB_V4,
f6d94e71 LP	38	/*
	39	* Starting at i.MX6 the hardware version register is gone, use the
	40	* i.MX family number as the version.
	41	*/
	42	MXSFB_V6,
45d59d70 MV	43	};
	44
	45	static const struct mxsfb_devdata mxsfb_devdata[] = {
	46	[MXSFB_V3] = {
	47	.transfer_count = LCDC_V3_TRANSFER_COUNT,
	48	.cur_buf = LCDC_V3_CUR_BUF,
	49	.next_buf = LCDC_V3_NEXT_BUF,
45d59d70 MV	50	.hs_wdth_mask = 0xff,
45d59d70 MV	51	.hs_wdth_shift = 24,
63aa581c	52	.has_overlay = false,
9891cb54	53	.has_ctrl2 = false,
45d59d70 MV	54	},
	55	[MXSFB_V4] = {
	56	.transfer_count = LCDC_V4_TRANSFER_COUNT,
	57	.cur_buf = LCDC_V4_CUR_BUF,
	58	.next_buf = LCDC_V4_NEXT_BUF,
45d59d70 MV	59	.hs_wdth_mask = 0x3fff,
45d59d70 MV	60	.hs_wdth_shift = 18,
63aa581c	61	.has_overlay = false,
9891cb54	62	.has_ctrl2 = true,
45d59d70	63	},
f6d94e71 LP	64	[MXSFB_V6] = {
	65	.transfer_count = LCDC_V4_TRANSFER_COUNT,
	66	.cur_buf = LCDC_V4_CUR_BUF,
	67	.next_buf = LCDC_V4_NEXT_BUF,
	68	.hs_wdth_mask = 0x3fff,
	69	.hs_wdth_shift = 18,
63aa581c	70	.has_overlay = true,
9891cb54	71	.has_ctrl2 = true,
f6d94e71	72	},
45d59d70 MV	73	};
45d59d70 MV	74
45d59d70 MV	75	void mxsfb_enable_axi_clk(struct mxsfb_drm_private *mxsfb)
	76	{
	77	if (mxsfb->clk_axi)
	78	clk_prepare_enable(mxsfb->clk_axi);
	79	}
	80
	81	void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb)
	82	{
	83	if (mxsfb->clk_axi)
	84	clk_disable_unprepare(mxsfb->clk_axi);
	85	}
	86
d5a0c816 SA	87	static struct drm_framebuffer *
	88	mxsfb_fb_create(struct drm_device dev, struct drm_file file_priv,
	89	const struct drm_mode_fb_cmd2 *mode_cmd)
	90	{
	91	const struct drm_format_info *info;
	92
	93	info = drm_get_format_info(dev, mode_cmd);
	94	if (!info)
	95	return ERR_PTR(-EINVAL);
	96
	97	if (mode_cmd->width * info->cpp[0] != mode_cmd->pitches[0]) {
	98	dev_dbg(dev->dev, "Invalid pitch: fb width must match pitch\n");
	99	return ERR_PTR(-EINVAL);
	100	}
	101
	102	return drm_gem_fb_create(dev, file_priv, mode_cmd);
	103	}
	104
45d59d70	105	static const struct drm_mode_config_funcs mxsfb_mode_config_funcs = {
d5a0c816	106	.fb_create = mxsfb_fb_create,
45d59d70 MV	107	.atomic_check = drm_atomic_helper_check,
	108	.atomic_commit = drm_atomic_helper_commit,
	109	};
	110
9f19fd3b LC	111	static const struct drm_mode_config_helper_funcs mxsfb_mode_config_helpers = {
	112	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
	113	};
	114
c42001e3 LP	115	static int mxsfb_attach_bridge(struct mxsfb_drm_private *mxsfb)
	116	{
	117	struct drm_device *drm = mxsfb->drm;
	118	struct drm_connector_list_iter iter;
	119	struct drm_panel *panel;
	120	struct drm_bridge *bridge;
	121	int ret;
	122
	123	ret = drm_of_find_panel_or_bridge(drm->dev->of_node, 0, 0, &panel,
	124	&bridge);
	125	if (ret)
	126	return ret;
	127
	128	if (panel) {
	129	bridge = devm_drm_panel_bridge_add_typed(drm->dev, panel,
	130	DRM_MODE_CONNECTOR_DPI);
	131	if (IS_ERR(bridge))
	132	return PTR_ERR(bridge);
	133	}
	134
	135	if (!bridge)
	136	return -ENODEV;
	137
ae1ed009	138	ret = drm_bridge_attach(&mxsfb->encoder, bridge, NULL, 0);
ee46d16d GG	139	if (ret)
ee46d16d GG	140	return dev_err_probe(drm->dev, ret, "Failed to attach bridge\n");
c42001e3 LP	141
	142	mxsfb->bridge = bridge;
	143
	144	/*
	145	* Get hold of the connector. This is a bit of a hack, until the bridge
	146	* API gives us bus flags and formats.
	147	*/
	148	drm_connector_list_iter_begin(drm, &iter);
	149	mxsfb->connector = drm_connector_list_iter_next(&iter);
	150	drm_connector_list_iter_end(&iter);
	151
	152	return 0;
	153	}
	154
5fc40f41 TZ	155	static irqreturn_t mxsfb_irq_handler(int irq, void *data)
	156	{
	157	struct drm_device *drm = data;
	158	struct mxsfb_drm_private *mxsfb = drm->dev_private;
	159	u32 reg;
	160
	161	reg = readl(mxsfb->base + LCDC_CTRL1);
	162
	163	if (reg & CTRL1_CUR_FRAME_DONE_IRQ)
	164	drm_crtc_handle_vblank(&mxsfb->crtc);
	165
	166	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
	167
	168	return IRQ_HANDLED;
	169	}
	170
	171	static void mxsfb_irq_disable(struct drm_device *drm)
	172	{
	173	struct mxsfb_drm_private *mxsfb = drm->dev_private;
	174
	175	mxsfb_enable_axi_clk(mxsfb);
3cfc1830 MV	176
	177	/* Disable and clear VBLANK IRQ */
	178	writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_CLR);
	179	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
	180
5fc40f41 TZ	181	mxsfb_disable_axi_clk(mxsfb);
	182	}
	183
	184	static int mxsfb_irq_install(struct drm_device *dev, int irq)
	185	{
	186	if (irq == IRQ_NOTCONNECTED)
	187	return -ENOTCONN;
	188
	189	mxsfb_irq_disable(dev);
	190
	191	return request_irq(irq, mxsfb_irq_handler, 0, dev->driver->name, dev);
	192	}
	193
	194	static void mxsfb_irq_uninstall(struct drm_device *dev)
	195	{
	196	struct mxsfb_drm_private *mxsfb = dev->dev_private;
	197
	198	mxsfb_irq_disable(dev);
	199	free_irq(mxsfb->irq, dev);
	200	}
	201
c6ddee82 LP	202	static int mxsfb_load(struct drm_device *drm,
c6ddee82 LP	203	const struct mxsfb_devdata *devdata)
45d59d70 MV	204	{
	205	struct platform_device *pdev = to_platform_device(drm->dev);
	206	struct mxsfb_drm_private *mxsfb;
	207	struct resource *res;
	208	int ret;
	209
	210	mxsfb = devm_kzalloc(&pdev->dev, sizeof(*mxsfb), GFP_KERNEL);
	211	if (!mxsfb)
	212	return -ENOMEM;
	213
c42001e3	214	mxsfb->drm = drm;
45d59d70	215	drm->dev_private = mxsfb;
c6ddee82	216	mxsfb->devdata = devdata;
45d59d70 MV	217
	218	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	219	mxsfb->base = devm_ioremap_resource(drm->dev, res);
	220	if (IS_ERR(mxsfb->base))
	221	return PTR_ERR(mxsfb->base);
	222
	223	mxsfb->clk = devm_clk_get(drm->dev, NULL);
	224	if (IS_ERR(mxsfb->clk))
	225	return PTR_ERR(mxsfb->clk);
	226
	227	mxsfb->clk_axi = devm_clk_get(drm->dev, "axi");
	228	if (IS_ERR(mxsfb->clk_axi))
	229	mxsfb->clk_axi = NULL;
	230
	231	mxsfb->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi");
	232	if (IS_ERR(mxsfb->clk_disp_axi))
	233	mxsfb->clk_disp_axi = NULL;
	234
	235	ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32));
	236	if (ret)
	237	return ret;
	238
	239	pm_runtime_enable(drm->dev);
	240
45d59d70 MV	241	/* Modeset init */
	242	drm_mode_config_init(drm);
	243
ae1ed009	244	ret = mxsfb_kms_init(mxsfb);
45d59d70	245	if (ret < 0) {
ae1ed009	246	dev_err(drm->dev, "Failed to initialize KMS pipeline\n");
45d59d70 MV	247	goto err_vblank;
	248	}
	249
b9f59376 LP	250	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
	251	if (ret < 0) {
	252	dev_err(drm->dev, "Failed to initialise vblank\n");
	253	goto err_vblank;
	254	}
	255
	256	/* Start with vertical blanking interrupt reporting disabled. */
	257	drm_crtc_vblank_off(&mxsfb->crtc);
	258
c42001e3 LP	259	ret = mxsfb_attach_bridge(mxsfb);
c42001e3 LP	260	if (ret) {
ee46d16d GG	261	if (ret != -EPROBE_DEFER)
ee46d16d GG	262	dev_err(drm->dev, "Cannot connect bridge: %d\n", ret);
c42001e3	263	goto err_vblank;
45d59d70 MV	264	}
	265
	266	drm->mode_config.min_width = MXSFB_MIN_XRES;
	267	drm->mode_config.min_height = MXSFB_MIN_YRES;
	268	drm->mode_config.max_width = MXSFB_MAX_XRES;
	269	drm->mode_config.max_height = MXSFB_MAX_YRES;
	270	drm->mode_config.funcs = &mxsfb_mode_config_funcs;
9f19fd3b	271	drm->mode_config.helper_private = &mxsfb_mode_config_helpers;
45d59d70 MV	272
	273	drm_mode_config_reset(drm);
	274
5fc40f41 TZ	275	ret = platform_get_irq(pdev, 0);
	276	if (ret < 0)
	277	goto err_vblank;
	278	mxsfb->irq = ret;
	279
45d59d70	280	pm_runtime_get_sync(drm->dev);
5fc40f41	281	ret = mxsfb_irq_install(drm, mxsfb->irq);
45d59d70 MV	282	pm_runtime_put_sync(drm->dev);
	283
	284	if (ret < 0) {
	285	dev_err(drm->dev, "Failed to install IRQ handler\n");
c42001e3	286	goto err_vblank;
45d59d70 MV	287	}
	288
	289	drm_kms_helper_poll_init(drm);
	290
45d59d70 MV	291	platform_set_drvdata(pdev, drm);
	292
	293	drm_helper_hpd_irq_event(drm);
	294
	295	return 0;
	296
45d59d70 MV	297	err_vblank:
	298	pm_runtime_disable(drm->dev);
	299
	300	return ret;
	301	}
	302
	303	static void mxsfb_unload(struct drm_device *drm)
	304	{
45d59d70 MV	305	drm_kms_helper_poll_fini(drm);
45d59d70 MV	306	drm_mode_config_cleanup(drm);
45d59d70 MV	307
45d59d70 MV	308	pm_runtime_get_sync(drm->dev);
5fc40f41	309	mxsfb_irq_uninstall(drm);
45d59d70 MV	310	pm_runtime_put_sync(drm->dev);
	311
	312	drm->dev_private = NULL;
	313
	314	pm_runtime_disable(drm->dev);
	315	}
	316
d55f7e5d	317	DEFINE_DRM_GEM_CMA_FOPS(fops);
45d59d70	318
70a59dd8	319	static const struct drm_driver mxsfb_driver = {
0424fdaf	320	.driver_features = DRIVER_GEM \| DRIVER_MODESET \| DRIVER_ATOMIC,
9fbf6542	321	DRM_GEM_CMA_DRIVER_OPS,
45d59d70 MV	322	.fops = &fops,
	323	.name = "mxsfb-drm",
	324	.desc = "MXSFB Controller DRM",
	325	.date = "20160824",
	326	.major = 1,
	327	.minor = 0,
	328	};
	329
45d59d70	330	static const struct of_device_id mxsfb_dt_ids[] = {
c6ddee82 LP	331	{ .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devdata[MXSFB_V3], },
	332	{ .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devdata[MXSFB_V4], },
	333	{ .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devdata[MXSFB_V6], },
45d59d70 MV	334	{ /* sentinel */ }
	335	};
	336	MODULE_DEVICE_TABLE(of, mxsfb_dt_ids);
	337
	338	static int mxsfb_probe(struct platform_device *pdev)
	339	{
	340	struct drm_device *drm;
	341	const struct of_device_id *of_id =
	342	of_match_device(mxsfb_dt_ids, &pdev->dev);
	343	int ret;
	344
	345	if (!pdev->dev.of_node)
	346	return -ENODEV;
	347
45d59d70	348	drm = drm_dev_alloc(&mxsfb_driver, &pdev->dev);
e89e50ac DC	349	if (IS_ERR(drm))
e89e50ac DC	350	return PTR_ERR(drm);
45d59d70	351
c6ddee82	352	ret = mxsfb_load(drm, of_id->data);
45d59d70 MV	353	if (ret)
	354	goto err_free;
	355
	356	ret = drm_dev_register(drm, 0);
	357	if (ret)
	358	goto err_unload;
	359
8e93f102 NT	360	drm_fbdev_generic_setup(drm, 32);
8e93f102 NT	361
45d59d70 MV	362	return 0;
	363
	364	err_unload:
	365	mxsfb_unload(drm);
	366	err_free:
808bad32	367	drm_dev_put(drm);
45d59d70 MV	368
	369	return ret;
	370	}
	371
	372	static int mxsfb_remove(struct platform_device *pdev)
	373	{
	374	struct drm_device *drm = platform_get_drvdata(pdev);
	375
	376	drm_dev_unregister(drm);
	377	mxsfb_unload(drm);
808bad32	378	drm_dev_put(drm);
45d59d70 MV	379
	380	return 0;
	381	}
	382
f0525a1c LC	383	#ifdef CONFIG_PM_SLEEP
	384	static int mxsfb_suspend(struct device *dev)
	385	{
	386	struct drm_device *drm = dev_get_drvdata(dev);
	387
	388	return drm_mode_config_helper_suspend(drm);
	389	}
	390
	391	static int mxsfb_resume(struct device *dev)
	392	{
	393	struct drm_device *drm = dev_get_drvdata(dev);
	394
	395	return drm_mode_config_helper_resume(drm);
	396	}
	397	#endif
	398
	399	static const struct dev_pm_ops mxsfb_pm_ops = {
	400	SET_SYSTEM_SLEEP_PM_OPS(mxsfb_suspend, mxsfb_resume)
	401	};
	402
45d59d70 MV	403	static struct platform_driver mxsfb_platform_driver = {
	404	.probe = mxsfb_probe,
	405	.remove = mxsfb_remove,
45d59d70 MV	406	.driver = {
	407	.name = "mxsfb",
	408	.of_match_table = mxsfb_dt_ids,
f0525a1c	409	.pm = &mxsfb_pm_ops,
45d59d70 MV	410	},
	411	};
	412
	413	module_platform_driver(mxsfb_platform_driver);
	414
	415	MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
	416	MODULE_DESCRIPTION("Freescale MXS DRM/KMS driver");
	417	MODULE_LICENSE("GPL");