[linux-2.6-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/dma-mapping.h>
#include <linux/io.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/property.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_fbdev_dma.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_mode_config.h>
#include <drm/drm_module.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,
		.has_crc32	= 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,
		.has_crc32	= 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,
		.has_crc32	= true,
	},
};

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

void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb)
{
	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, crc;
	u64 vbc;

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

	if (reg & CTRL1_CUR_FRAME_DONE_IRQ) {
		drm_crtc_handle_vblank(&mxsfb->crtc);
		if (mxsfb->crc_active) {
			crc = readl(mxsfb->base + LCDC_V4_CRC_STAT);
			vbc = drm_crtc_accurate_vblank_count(&mxsfb->crtc);
			drm_crtc_add_crc_entry(&mxsfb->crtc, true, vbc, &crc);
		}
	}

	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_optional(drm->dev, "axi");
	if (IS_ERR(mxsfb->clk_axi))
		return PTR_ERR(mxsfb->clk_axi);

	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) {
		dev_err_probe(drm->dev, ret, "Cannot connect bridge\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);

	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_DMA_FOPS(fops);

static const struct drm_driver mxsfb_driver = {
	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
	DRM_GEM_DMA_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;
	int ret;

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

	ret = mxsfb_load(drm, device_get_match_data(&pdev->dev));
	if (ret)
		goto err_free;

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

	drm_fbdev_dma_setup(drm, 32);

	return 0;

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

	return ret;
}

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

	drm_dev_unregister(drm);
	drm_atomic_helper_shutdown(drm);
	mxsfb_unload(drm);
	drm_dev_put(drm);
}

static void mxsfb_shutdown(struct platform_device *pdev)
{
	struct drm_device *drm = platform_get_drvdata(pdev);

	drm_atomic_helper_shutdown(drm);
}

#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_new	= mxsfb_remove,
	.shutdown	= mxsfb_shutdown,
	.driver	= {
		.name		= "mxsfb",
		.of_match_table	= mxsfb_dt_ids,
		.pm		= &mxsfb_pm_ops,
	},
};

drm_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>
e1704914	14	#include <linux/mod_devicetable.h>
d5742c6c	15	#include <linux/module.h>
ae1ed009	16	#include <linux/platform_device.h>
e1704914	17	#include <linux/property.h>
45d59d70	18	#include <linux/pm_runtime.h>
45d59d70	19
45d59d70	20	#include <drm/drm_atomic_helper.h>
ae1ed009 LP	21	#include <drm/drm_bridge.h>
ae1ed009 LP	22	#include <drm/drm_connector.h>
d5742c6c	23	#include <drm/drm_drv.h>
5fe96f6a	24	#include <drm/drm_fbdev_dma.h>
d5a0c816	25	#include <drm/drm_fourcc.h>
4a83c26a	26	#include <drm/drm_gem_dma_helper.h>
98f3eac5	27	#include <drm/drm_gem_framebuffer_helper.h>
ae1ed009	28	#include <drm/drm_mode_config.h>
d405054d	29	#include <drm/drm_module.h>
45d59d70	30	#include <drm/drm_of.h>
fcd70cd3	31	#include <drm/drm_probe_helper.h>
d5742c6c	32	#include <drm/drm_vblank.h>
45d59d70 MV	33
	34	#include "mxsfb_drv.h"
	35	#include "mxsfb_regs.h"
	36
	37	enum mxsfb_devtype {
	38	MXSFB_V3,
	39	MXSFB_V4,
f6d94e71 LP	40	/*
	41	* Starting at i.MX6 the hardware version register is gone, use the
	42	* i.MX family number as the version.
	43	*/
	44	MXSFB_V6,
45d59d70 MV	45	};
	46
	47	static const struct mxsfb_devdata mxsfb_devdata[] = {
	48	[MXSFB_V3] = {
	49	.transfer_count = LCDC_V3_TRANSFER_COUNT,
	50	.cur_buf = LCDC_V3_CUR_BUF,
	51	.next_buf = LCDC_V3_NEXT_BUF,
45d59d70 MV	52	.hs_wdth_mask = 0xff,
45d59d70 MV	53	.hs_wdth_shift = 24,
63aa581c	54	.has_overlay = false,
9891cb54	55	.has_ctrl2 = false,
05ecc678	56	.has_crc32 = false,
45d59d70 MV	57	},
	58	[MXSFB_V4] = {
	59	.transfer_count = LCDC_V4_TRANSFER_COUNT,
	60	.cur_buf = LCDC_V4_CUR_BUF,
	61	.next_buf = LCDC_V4_NEXT_BUF,
45d59d70 MV	62	.hs_wdth_mask = 0x3fff,
45d59d70 MV	63	.hs_wdth_shift = 18,
63aa581c	64	.has_overlay = false,
9891cb54	65	.has_ctrl2 = true,
05ecc678	66	.has_crc32 = true,
45d59d70	67	},
f6d94e71 LP	68	[MXSFB_V6] = {
	69	.transfer_count = LCDC_V4_TRANSFER_COUNT,
	70	.cur_buf = LCDC_V4_CUR_BUF,
	71	.next_buf = LCDC_V4_NEXT_BUF,
	72	.hs_wdth_mask = 0x3fff,
	73	.hs_wdth_shift = 18,
63aa581c	74	.has_overlay = true,
9891cb54	75	.has_ctrl2 = true,
05ecc678	76	.has_crc32 = true,
f6d94e71	77	},
45d59d70 MV	78	};
45d59d70 MV	79
45d59d70 MV	80	void mxsfb_enable_axi_clk(struct mxsfb_drm_private *mxsfb)
45d59d70 MV	81	{
6d6defd4	82	clk_prepare_enable(mxsfb->clk_axi);
45d59d70 MV	83	}
	84
	85	void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb)
	86	{
6d6defd4	87	clk_disable_unprepare(mxsfb->clk_axi);
45d59d70 MV	88	}
45d59d70 MV	89
d5a0c816 SA	90	static struct drm_framebuffer *
	91	mxsfb_fb_create(struct drm_device dev, struct drm_file file_priv,
	92	const struct drm_mode_fb_cmd2 *mode_cmd)
	93	{
	94	const struct drm_format_info *info;
	95
	96	info = drm_get_format_info(dev, mode_cmd);
	97	if (!info)
	98	return ERR_PTR(-EINVAL);
	99
	100	if (mode_cmd->width * info->cpp[0] != mode_cmd->pitches[0]) {
	101	dev_dbg(dev->dev, "Invalid pitch: fb width must match pitch\n");
	102	return ERR_PTR(-EINVAL);
	103	}
	104
	105	return drm_gem_fb_create(dev, file_priv, mode_cmd);
	106	}
	107
45d59d70	108	static const struct drm_mode_config_funcs mxsfb_mode_config_funcs = {
d5a0c816	109	.fb_create = mxsfb_fb_create,
45d59d70 MV	110	.atomic_check = drm_atomic_helper_check,
	111	.atomic_commit = drm_atomic_helper_commit,
	112	};
	113
9f19fd3b LC	114	static const struct drm_mode_config_helper_funcs mxsfb_mode_config_helpers = {
	115	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
	116	};
	117
c42001e3 LP	118	static int mxsfb_attach_bridge(struct mxsfb_drm_private *mxsfb)
	119	{
	120	struct drm_device *drm = mxsfb->drm;
	121	struct drm_connector_list_iter iter;
	122	struct drm_panel *panel;
	123	struct drm_bridge *bridge;
	124	int ret;
	125
	126	ret = drm_of_find_panel_or_bridge(drm->dev->of_node, 0, 0, &panel,
	127	&bridge);
	128	if (ret)
	129	return ret;
	130
	131	if (panel) {
	132	bridge = devm_drm_panel_bridge_add_typed(drm->dev, panel,
	133	DRM_MODE_CONNECTOR_DPI);
	134	if (IS_ERR(bridge))
	135	return PTR_ERR(bridge);
	136	}
	137
	138	if (!bridge)
	139	return -ENODEV;
	140
ae1ed009	141	ret = drm_bridge_attach(&mxsfb->encoder, bridge, NULL, 0);
ee46d16d GG	142	if (ret)
ee46d16d GG	143	return dev_err_probe(drm->dev, ret, "Failed to attach bridge\n");
c42001e3 LP	144
	145	mxsfb->bridge = bridge;
	146
	147	/*
	148	* Get hold of the connector. This is a bit of a hack, until the bridge
	149	* API gives us bus flags and formats.
	150	*/
	151	drm_connector_list_iter_begin(drm, &iter);
	152	mxsfb->connector = drm_connector_list_iter_next(&iter);
	153	drm_connector_list_iter_end(&iter);
	154
	155	return 0;
	156	}
	157
5fc40f41 TZ	158	static irqreturn_t mxsfb_irq_handler(int irq, void *data)
	159	{
	160	struct drm_device *drm = data;
	161	struct mxsfb_drm_private *mxsfb = drm->dev_private;
05ecc678 MV	162	u32 reg, crc;
05ecc678 MV	163	u64 vbc;
5fc40f41 TZ	164
	165	reg = readl(mxsfb->base + LCDC_CTRL1);
	166
05ecc678	167	if (reg & CTRL1_CUR_FRAME_DONE_IRQ) {
5fc40f41	168	drm_crtc_handle_vblank(&mxsfb->crtc);
05ecc678 MV	169	if (mxsfb->crc_active) {
	170	crc = readl(mxsfb->base + LCDC_V4_CRC_STAT);
	171	vbc = drm_crtc_accurate_vblank_count(&mxsfb->crtc);
	172	drm_crtc_add_crc_entry(&mxsfb->crtc, true, vbc, &crc);
	173	}
	174	}
5fc40f41 TZ	175
	176	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
	177
	178	return IRQ_HANDLED;
	179	}
	180
	181	static void mxsfb_irq_disable(struct drm_device *drm)
	182	{
	183	struct mxsfb_drm_private *mxsfb = drm->dev_private;
	184
	185	mxsfb_enable_axi_clk(mxsfb);
3cfc1830 MV	186
	187	/* Disable and clear VBLANK IRQ */
	188	writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_CLR);
	189	writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
	190
5fc40f41 TZ	191	mxsfb_disable_axi_clk(mxsfb);
	192	}
	193
	194	static int mxsfb_irq_install(struct drm_device *dev, int irq)
	195	{
	196	if (irq == IRQ_NOTCONNECTED)
	197	return -ENOTCONN;
	198
	199	mxsfb_irq_disable(dev);
	200
	201	return request_irq(irq, mxsfb_irq_handler, 0, dev->driver->name, dev);
	202	}
	203
	204	static void mxsfb_irq_uninstall(struct drm_device *dev)
	205	{
	206	struct mxsfb_drm_private *mxsfb = dev->dev_private;
	207
	208	mxsfb_irq_disable(dev);
	209	free_irq(mxsfb->irq, dev);
	210	}
	211
c6ddee82 LP	212	static int mxsfb_load(struct drm_device *drm,
c6ddee82 LP	213	const struct mxsfb_devdata *devdata)
45d59d70 MV	214	{
	215	struct platform_device *pdev = to_platform_device(drm->dev);
	216	struct mxsfb_drm_private *mxsfb;
	217	struct resource *res;
	218	int ret;
	219
	220	mxsfb = devm_kzalloc(&pdev->dev, sizeof(*mxsfb), GFP_KERNEL);
	221	if (!mxsfb)
	222	return -ENOMEM;
	223
c42001e3	224	mxsfb->drm = drm;
45d59d70	225	drm->dev_private = mxsfb;
c6ddee82	226	mxsfb->devdata = devdata;
45d59d70 MV	227
	228	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	229	mxsfb->base = devm_ioremap_resource(drm->dev, res);
	230	if (IS_ERR(mxsfb->base))
	231	return PTR_ERR(mxsfb->base);
	232
	233	mxsfb->clk = devm_clk_get(drm->dev, NULL);
	234	if (IS_ERR(mxsfb->clk))
	235	return PTR_ERR(mxsfb->clk);
	236
6d6defd4	237	mxsfb->clk_axi = devm_clk_get_optional(drm->dev, "axi");
45d59d70	238	if (IS_ERR(mxsfb->clk_axi))
6d6defd4	239	return PTR_ERR(mxsfb->clk_axi);
45d59d70 MV	240
	241	mxsfb->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi");
	242	if (IS_ERR(mxsfb->clk_disp_axi))
	243	mxsfb->clk_disp_axi = NULL;
	244
	245	ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32));
	246	if (ret)
	247	return ret;
	248
	249	pm_runtime_enable(drm->dev);
	250
45d59d70 MV	251	/* Modeset init */
	252	drm_mode_config_init(drm);
	253
ae1ed009	254	ret = mxsfb_kms_init(mxsfb);
45d59d70	255	if (ret < 0) {
ae1ed009	256	dev_err(drm->dev, "Failed to initialize KMS pipeline\n");
45d59d70 MV	257	goto err_vblank;
	258	}
	259
b9f59376 LP	260	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
	261	if (ret < 0) {
	262	dev_err(drm->dev, "Failed to initialise vblank\n");
	263	goto err_vblank;
	264	}
	265
	266	/* Start with vertical blanking interrupt reporting disabled. */
	267	drm_crtc_vblank_off(&mxsfb->crtc);
	268
c42001e3 LP	269	ret = mxsfb_attach_bridge(mxsfb);
c42001e3 LP	270	if (ret) {
c5e804ba	271	dev_err_probe(drm->dev, ret, "Cannot connect bridge\n");
c42001e3	272	goto err_vblank;
45d59d70 MV	273	}
	274
	275	drm->mode_config.min_width = MXSFB_MIN_XRES;
	276	drm->mode_config.min_height = MXSFB_MIN_YRES;
	277	drm->mode_config.max_width = MXSFB_MAX_XRES;
	278	drm->mode_config.max_height = MXSFB_MAX_YRES;
	279	drm->mode_config.funcs = &mxsfb_mode_config_funcs;
9f19fd3b	280	drm->mode_config.helper_private = &mxsfb_mode_config_helpers;
45d59d70 MV	281
	282	drm_mode_config_reset(drm);
	283
5fc40f41 TZ	284	ret = platform_get_irq(pdev, 0);
	285	if (ret < 0)
	286	goto err_vblank;
	287	mxsfb->irq = ret;
	288
45d59d70	289	pm_runtime_get_sync(drm->dev);
5fc40f41	290	ret = mxsfb_irq_install(drm, mxsfb->irq);
45d59d70 MV	291	pm_runtime_put_sync(drm->dev);
	292
	293	if (ret < 0) {
	294	dev_err(drm->dev, "Failed to install IRQ handler\n");
c42001e3	295	goto err_vblank;
45d59d70 MV	296	}
	297
	298	drm_kms_helper_poll_init(drm);
	299
45d59d70 MV	300	platform_set_drvdata(pdev, drm);
	301
	302	drm_helper_hpd_irq_event(drm);
	303
	304	return 0;
	305
45d59d70 MV	306	err_vblank:
	307	pm_runtime_disable(drm->dev);
	308
	309	return ret;
	310	}
	311
	312	static void mxsfb_unload(struct drm_device *drm)
	313	{
45d59d70 MV	314	drm_kms_helper_poll_fini(drm);
45d59d70 MV	315	drm_mode_config_cleanup(drm);
45d59d70 MV	316
45d59d70 MV	317	pm_runtime_get_sync(drm->dev);
5fc40f41	318	mxsfb_irq_uninstall(drm);
45d59d70 MV	319	pm_runtime_put_sync(drm->dev);
	320
	321	drm->dev_private = NULL;
	322
	323	pm_runtime_disable(drm->dev);
	324	}
	325
4a83c26a	326	DEFINE_DRM_GEM_DMA_FOPS(fops);
45d59d70	327
70a59dd8	328	static const struct drm_driver mxsfb_driver = {
0424fdaf	329	.driver_features = DRIVER_GEM \| DRIVER_MODESET \| DRIVER_ATOMIC,
4a83c26a	330	DRM_GEM_DMA_DRIVER_OPS,
45d59d70 MV	331	.fops = &fops,
	332	.name = "mxsfb-drm",
	333	.desc = "MXSFB Controller DRM",
	334	.date = "20160824",
	335	.major = 1,
	336	.minor = 0,
	337	};
	338
45d59d70	339	static const struct of_device_id mxsfb_dt_ids[] = {
c6ddee82 LP	340	{ .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devdata[MXSFB_V3], },
	341	{ .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devdata[MXSFB_V4], },
	342	{ .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devdata[MXSFB_V6], },
45d59d70 MV	343	{ /* sentinel */ }
	344	};
	345	MODULE_DEVICE_TABLE(of, mxsfb_dt_ids);
	346
	347	static int mxsfb_probe(struct platform_device *pdev)
	348	{
	349	struct drm_device *drm;
45d59d70 MV	350	int ret;
45d59d70 MV	351
45d59d70	352	drm = drm_dev_alloc(&mxsfb_driver, &pdev->dev);
e89e50ac DC	353	if (IS_ERR(drm))
e89e50ac DC	354	return PTR_ERR(drm);
45d59d70	355
e1704914	356	ret = mxsfb_load(drm, device_get_match_data(&pdev->dev));
45d59d70 MV	357	if (ret)
	358	goto err_free;
	359
	360	ret = drm_dev_register(drm, 0);
	361	if (ret)
	362	goto err_unload;
	363
5fe96f6a	364	drm_fbdev_dma_setup(drm, 32);
8e93f102	365
45d59d70 MV	366	return 0;
	367
	368	err_unload:
	369	mxsfb_unload(drm);
	370	err_free:
808bad32	371	drm_dev_put(drm);
45d59d70 MV	372
	373	return ret;
	374	}
	375
bd296a59	376	static void mxsfb_remove(struct platform_device *pdev)
45d59d70 MV	377	{
	378	struct drm_device *drm = platform_get_drvdata(pdev);
	379
	380	drm_dev_unregister(drm);
72f6c033	381	drm_atomic_helper_shutdown(drm);
45d59d70	382	mxsfb_unload(drm);
808bad32	383	drm_dev_put(drm);
45d59d70 MV	384	}
45d59d70 MV	385
653af51c MV	386	static void mxsfb_shutdown(struct platform_device *pdev)
	387	{
	388	struct drm_device *drm = platform_get_drvdata(pdev);
	389
	390	drm_atomic_helper_shutdown(drm);
	391	}
	392
f0525a1c LC	393	#ifdef CONFIG_PM_SLEEP
	394	static int mxsfb_suspend(struct device *dev)
	395	{
	396	struct drm_device *drm = dev_get_drvdata(dev);
	397
	398	return drm_mode_config_helper_suspend(drm);
	399	}
	400
	401	static int mxsfb_resume(struct device *dev)
	402	{
	403	struct drm_device *drm = dev_get_drvdata(dev);
	404
	405	return drm_mode_config_helper_resume(drm);
	406	}
	407	#endif
	408
	409	static const struct dev_pm_ops mxsfb_pm_ops = {
	410	SET_SYSTEM_SLEEP_PM_OPS(mxsfb_suspend, mxsfb_resume)
	411	};
	412
45d59d70 MV	413	static struct platform_driver mxsfb_platform_driver = {
45d59d70 MV	414	.probe = mxsfb_probe,
bd296a59	415	.remove_new = mxsfb_remove,
653af51c	416	.shutdown = mxsfb_shutdown,
45d59d70 MV	417	.driver = {
	418	.name = "mxsfb",
	419	.of_match_table = mxsfb_dt_ids,
f0525a1c	420	.pm = &mxsfb_pm_ops,
45d59d70 MV	421	},
	422	};
	423
d405054d	424	drm_module_platform_driver(mxsfb_platform_driver);
45d59d70 MV	425
	426	MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
	427	MODULE_DESCRIPTION("Freescale MXS DRM/KMS driver");
	428	MODULE_LICENSE("GPL");