[thirdparty/kernel/stable.git] / drivers / gpu / drm / imx / imx-drm-core.c

/*
 * Freescale i.MX drm driver
 *
 * Copyright (C) 2011 Sascha Hauer, Pengutronix
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */
#include <linux/component.h>
#include <linux/device.h>
#include <linux/dma-buf.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_of.h>
#include <video/imx-ipu-v3.h>

#include "imx-drm.h"

#define MAX_CRTC	4

struct imx_drm_component {
	struct device_node *of_node;
	struct list_head list;
};

struct imx_drm_device {
	struct drm_device			*drm;
	unsigned int				pipes;
	struct drm_fbdev_cma			*fbhelper;
	struct drm_atomic_state			*state;
};

#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
static int legacyfb_depth = 16;
module_param(legacyfb_depth, int, 0444);
#endif

static void imx_drm_driver_lastclose(struct drm_device *drm)
{
	struct imx_drm_device *imxdrm = drm->dev_private;

	drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
}

static const struct file_operations imx_drm_driver_fops = {
	.owner = THIS_MODULE,
	.open = drm_open,
	.release = drm_release,
	.unlocked_ioctl = drm_ioctl,
	.mmap = drm_gem_cma_mmap,
	.poll = drm_poll,
	.read = drm_read,
	.llseek = noop_llseek,
};

void imx_drm_connector_destroy(struct drm_connector *connector)
{
	drm_connector_unregister(connector);
	drm_connector_cleanup(connector);
}
EXPORT_SYMBOL_GPL(imx_drm_connector_destroy);

void imx_drm_encoder_destroy(struct drm_encoder *encoder)
{
	drm_encoder_cleanup(encoder);
}
EXPORT_SYMBOL_GPL(imx_drm_encoder_destroy);

static void imx_drm_output_poll_changed(struct drm_device *drm)
{
	struct imx_drm_device *imxdrm = drm->dev_private;

	drm_fbdev_cma_hotplug_event(imxdrm->fbhelper);
}

static int imx_drm_atomic_check(struct drm_device *dev,
				struct drm_atomic_state *state)
{
	int ret;

	ret = drm_atomic_helper_check_modeset(dev, state);
	if (ret)
		return ret;

	ret = drm_atomic_helper_check_planes(dev, state);
	if (ret)
		return ret;

	/*
	 * Check modeset again in case crtc_state->mode_changed is
	 * updated in plane's ->atomic_check callback.
	 */
	ret = drm_atomic_helper_check_modeset(dev, state);
	if (ret)
		return ret;

	return ret;
}

static const struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
	.fb_create = drm_fb_cma_create,
	.output_poll_changed = imx_drm_output_poll_changed,
	.atomic_check = imx_drm_atomic_check,
	.atomic_commit = drm_atomic_helper_commit,
};

static void imx_drm_atomic_commit_tail(struct drm_atomic_state *state)
{
	struct drm_device *dev = state->dev;

	drm_atomic_helper_commit_modeset_disables(dev, state);

	drm_atomic_helper_commit_planes(dev, state,
				DRM_PLANE_COMMIT_ACTIVE_ONLY |
				DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET);

	drm_atomic_helper_commit_modeset_enables(dev, state);

	drm_atomic_helper_commit_hw_done(state);

	drm_atomic_helper_wait_for_vblanks(dev, state);

	drm_atomic_helper_cleanup_planes(dev, state);
}

static const struct drm_mode_config_helper_funcs imx_drm_mode_config_helpers = {
	.atomic_commit_tail = imx_drm_atomic_commit_tail,
};


int imx_drm_encoder_parse_of(struct drm_device *drm,
	struct drm_encoder *encoder, struct device_node *np)
{
	uint32_t crtc_mask = drm_of_find_possible_crtcs(drm, np);

	/*
	 * If we failed to find the CRTC(s) which this encoder is
	 * supposed to be connected to, it's because the CRTC has
	 * not been registered yet.  Defer probing, and hope that
	 * the required CRTC is added later.
	 */
	if (crtc_mask == 0)
		return -EPROBE_DEFER;

	encoder->possible_crtcs = crtc_mask;

	/* FIXME: this is the mask of outputs which can clone this output. */
	encoder->possible_clones = ~0;

	return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);

static const struct drm_ioctl_desc imx_drm_ioctls[] = {
	/* none so far */
};

static struct drm_driver imx_drm_driver = {
	.driver_features	= DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
				  DRIVER_ATOMIC,
	.lastclose		= imx_drm_driver_lastclose,
	.gem_free_object_unlocked = drm_gem_cma_free_object,
	.gem_vm_ops		= &drm_gem_cma_vm_ops,
	.dumb_create		= drm_gem_cma_dumb_create,
	.dumb_map_offset	= drm_gem_cma_dumb_map_offset,
	.dumb_destroy		= drm_gem_dumb_destroy,

	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
	.gem_prime_import	= drm_gem_prime_import,
	.gem_prime_export	= drm_gem_prime_export,
	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	.gem_prime_vmap		= drm_gem_cma_prime_vmap,
	.gem_prime_vunmap	= drm_gem_cma_prime_vunmap,
	.gem_prime_mmap		= drm_gem_cma_prime_mmap,
	.ioctls			= imx_drm_ioctls,
	.num_ioctls		= ARRAY_SIZE(imx_drm_ioctls),
	.fops			= &imx_drm_driver_fops,
	.name			= "imx-drm",
	.desc			= "i.MX DRM graphics",
	.date			= "20120507",
	.major			= 1,
	.minor			= 0,
	.patchlevel		= 0,
};

static int compare_of(struct device *dev, void *data)
{
	struct device_node *np = data;

	/* Special case for DI, dev->of_node may not be set yet */
	if (strcmp(dev->driver->name, "imx-ipuv3-crtc") == 0) {
		struct ipu_client_platformdata *pdata = dev->platform_data;

		return pdata->of_node == np;
	}

	/* Special case for LDB, one device for two channels */
	if (of_node_cmp(np->name, "lvds-channel") == 0) {
		np = of_get_parent(np);
		of_node_put(np);
	}

	return dev->of_node == np;
}

static int imx_drm_bind(struct device *dev)
{
	struct drm_device *drm;
	struct imx_drm_device *imxdrm;
	int ret;

	drm = drm_dev_alloc(&imx_drm_driver, dev);
	if (IS_ERR(drm))
		return PTR_ERR(drm);

	imxdrm = devm_kzalloc(dev, sizeof(*imxdrm), GFP_KERNEL);
	if (!imxdrm) {
		ret = -ENOMEM;
		goto err_unref;
	}

	imxdrm->drm = drm;
	drm->dev_private = imxdrm;

	/*
	 * enable drm irq mode.
	 * - with irq_enabled = true, we can use the vblank feature.
	 *
	 * P.S. note that we wouldn't use drm irq handler but
	 *      just specific driver own one instead because
	 *      drm framework supports only one irq handler and
	 *      drivers can well take care of their interrupts
	 */
	drm->irq_enabled = true;

	/*
	 * set max width and height as default value(4096x4096).
	 * this value would be used to check framebuffer size limitation
	 * at drm_mode_addfb().
	 */
	drm->mode_config.min_width = 1;
	drm->mode_config.min_height = 1;
	drm->mode_config.max_width = 4096;
	drm->mode_config.max_height = 4096;
	drm->mode_config.funcs = &imx_drm_mode_config_funcs;
	drm->mode_config.helper_private = &imx_drm_mode_config_helpers;

	drm_mode_config_init(drm);

	ret = drm_vblank_init(drm, MAX_CRTC);
	if (ret)
		goto err_kms;

	dev_set_drvdata(dev, drm);

	/* Now try and bind all our sub-components */
	ret = component_bind_all(dev, drm);
	if (ret)
		goto err_vblank;

	drm_mode_config_reset(drm);

	/*
	 * All components are now initialised, so setup the fb helper.
	 * The fb helper takes copies of key hardware information, so the
	 * crtcs/connectors/encoders must not change after this point.
	 */
#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
	if (legacyfb_depth != 16 && legacyfb_depth != 32) {
		dev_warn(dev, "Invalid legacyfb_depth.  Defaulting to 16bpp\n");
		legacyfb_depth = 16;
	}
	imxdrm->fbhelper = drm_fbdev_cma_init(drm, legacyfb_depth, MAX_CRTC);
	if (IS_ERR(imxdrm->fbhelper)) {
		ret = PTR_ERR(imxdrm->fbhelper);
		imxdrm->fbhelper = NULL;
		goto err_unbind;
	}
#endif

	drm_kms_helper_poll_init(drm);

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

	return 0;

err_fbhelper:
	drm_kms_helper_poll_fini(drm);
#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
	if (imxdrm->fbhelper)
		drm_fbdev_cma_fini(imxdrm->fbhelper);
err_unbind:
#endif
	component_unbind_all(drm->dev, drm);
err_vblank:
	drm_vblank_cleanup(drm);
err_kms:
	drm_mode_config_cleanup(drm);
err_unref:
	drm_dev_unref(drm);

	return ret;
}

static void imx_drm_unbind(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct imx_drm_device *imxdrm = drm->dev_private;

	drm_dev_unregister(drm);

	drm_kms_helper_poll_fini(drm);

	if (imxdrm->fbhelper)
		drm_fbdev_cma_fini(imxdrm->fbhelper);

	drm_mode_config_cleanup(drm);

	component_unbind_all(drm->dev, drm);
	dev_set_drvdata(dev, NULL);

	drm_dev_unref(drm);
}

static const struct component_master_ops imx_drm_ops = {
	.bind = imx_drm_bind,
	.unbind = imx_drm_unbind,
};

static int imx_drm_platform_probe(struct platform_device *pdev)
{
	int ret = drm_of_component_probe(&pdev->dev, compare_of, &imx_drm_ops);

	if (!ret)
		ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));

	return ret;
}

static int imx_drm_platform_remove(struct platform_device *pdev)
{
	component_master_del(&pdev->dev, &imx_drm_ops);
	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int imx_drm_suspend(struct device *dev)
{
	struct drm_device *drm_dev = dev_get_drvdata(dev);
	struct imx_drm_device *imxdrm;

	/* The drm_dev is NULL before .load hook is called */
	if (drm_dev == NULL)
		return 0;

	drm_kms_helper_poll_disable(drm_dev);

	imxdrm = drm_dev->dev_private;
	imxdrm->state = drm_atomic_helper_suspend(drm_dev);
	if (IS_ERR(imxdrm->state)) {
		drm_kms_helper_poll_enable(drm_dev);
		return PTR_ERR(imxdrm->state);
	}

	return 0;
}

static int imx_drm_resume(struct device *dev)
{
	struct drm_device *drm_dev = dev_get_drvdata(dev);
	struct imx_drm_device *imx_drm;

	if (drm_dev == NULL)
		return 0;

	imx_drm = drm_dev->dev_private;
	drm_atomic_helper_resume(drm_dev, imx_drm->state);
	drm_kms_helper_poll_enable(drm_dev);

	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(imx_drm_pm_ops, imx_drm_suspend, imx_drm_resume);

static const struct of_device_id imx_drm_dt_ids[] = {
	{ .compatible = "fsl,imx-display-subsystem", },
	{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, imx_drm_dt_ids);

static struct platform_driver imx_drm_pdrv = {
	.probe		= imx_drm_platform_probe,
	.remove		= imx_drm_platform_remove,
	.driver		= {
		.name	= "imx-drm",
		.pm	= &imx_drm_pm_ops,
		.of_match_table = imx_drm_dt_ids,
	},
};
module_platform_driver(imx_drm_pdrv);

MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
MODULE_DESCRIPTION("i.MX drm driver core");
MODULE_LICENSE("GPL");
Commit	Line	Data
e692da4d SH	1	/*
	2	* Freescale i.MX drm driver
	3	*
	4	* Copyright (C) 2011 Sascha Hauer, Pengutronix
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version 2
	9	* of the License, or (at your option) any later version.
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	*/
17b5001b	16	#include <linux/component.h>
e692da4d	17	#include <linux/device.h>
5f2f9115	18	#include <linux/dma-buf.h>
e7d6231e	19	#include <linux/module.h>
e692da4d SH	20	#include <linux/platform_device.h>
e692da4d SH	21	#include <drm/drmP.h>
5f2f9115 LY	22	#include <drm/drm_atomic.h>
5f2f9115 LY	23	#include <drm/drm_atomic_helper.h>
e692da4d SH	24	#include <drm/drm_fb_helper.h>
e692da4d SH	25	#include <drm/drm_crtc_helper.h>
e692da4d SH	26	#include <drm/drm_gem_cma_helper.h>
e692da4d SH	27	#include <drm/drm_fb_cma_helper.h>
3cb9ae4f	28	#include <drm/drm_plane_helper.h>
6457b971	29	#include <drm/drm_of.h>
310944d1	30	#include <video/imx-ipu-v3.h>
e692da4d SH	31
	32	#include "imx-drm.h"
	33
	34	#define MAX_CRTC 4
	35
655b43cc PZ	36	struct imx_drm_component {
	37	struct device_node *of_node;
	38	struct list_head list;
	39	};
	40
e692da4d SH	41	struct imx_drm_device {
e692da4d SH	42	struct drm_device *drm;
d2ab8ad9	43	unsigned int pipes;
e692da4d	44	struct drm_fbdev_cma *fbhelper;
5f2f9115	45	struct drm_atomic_state *state;
e692da4d SH	46	};
e692da4d SH	47
c1ff5a7a	48	#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
8acba02f RK	49	static int legacyfb_depth = 16;
8acba02f RK	50	module_param(legacyfb_depth, int, 0444);
c1ff5a7a	51	#endif
8acba02f	52
e692da4d SH	53	static void imx_drm_driver_lastclose(struct drm_device *drm)
	54	{
	55	struct imx_drm_device *imxdrm = drm->dev_private;
	56
3f3a7280	57	drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
e692da4d SH	58	}
e692da4d SH	59
e692da4d SH	60	static const struct file_operations imx_drm_driver_fops = {
	61	.owner = THIS_MODULE,
	62	.open = drm_open,
	63	.release = drm_release,
	64	.unlocked_ioctl = drm_ioctl,
	65	.mmap = drm_gem_cma_mmap,
	66	.poll = drm_poll,
e692da4d SH	67	.read = drm_read,
	68	.llseek = noop_llseek,
	69	};
	70
8a51a33b RK	71	void imx_drm_connector_destroy(struct drm_connector *connector)
8a51a33b RK	72	{
34ea3d38	73	drm_connector_unregister(connector);
8a51a33b RK	74	drm_connector_cleanup(connector);
	75	}
	76	EXPORT_SYMBOL_GPL(imx_drm_connector_destroy);
	77
	78	void imx_drm_encoder_destroy(struct drm_encoder *encoder)
	79	{
	80	drm_encoder_cleanup(encoder);
	81	}
	82	EXPORT_SYMBOL_GPL(imx_drm_encoder_destroy);
	83
3e68439b RK	84	static void imx_drm_output_poll_changed(struct drm_device *drm)
3e68439b RK	85	{
3e68439b RK	86	struct imx_drm_device *imxdrm = drm->dev_private;
	87
	88	drm_fbdev_cma_hotplug_event(imxdrm->fbhelper);
3e68439b RK	89	}
3e68439b RK	90
1780999c LY	91	static int imx_drm_atomic_check(struct drm_device *dev,
	92	struct drm_atomic_state *state)
	93	{
	94	int ret;
	95
	96	ret = drm_atomic_helper_check_modeset(dev, state);
	97	if (ret)
	98	return ret;
	99
	100	ret = drm_atomic_helper_check_planes(dev, state);
	101	if (ret)
	102	return ret;
	103
	104	/*
	105	* Check modeset again in case crtc_state->mode_changed is
	106	* updated in plane's ->atomic_check callback.
	107	*/
	108	ret = drm_atomic_helper_check_modeset(dev, state);
	109	if (ret)
	110	return ret;
	111
	112	return ret;
	113	}
	114
7ae847dd	115	static const struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
1df8b530	116	.fb_create = drm_fb_cma_create,
3e68439b	117	.output_poll_changed = imx_drm_output_poll_changed,
1780999c	118	.atomic_check = imx_drm_atomic_check,
782ea2a4	119	.atomic_commit = drm_atomic_helper_commit,
5f2f9115 LY	120	};
	121
	122	static void imx_drm_atomic_commit_tail(struct drm_atomic_state *state)
	123	{
	124	struct drm_device *dev = state->dev;
5f2f9115 LY	125
	126	drm_atomic_helper_commit_modeset_disables(dev, state);
	127
2b58e98d	128	drm_atomic_helper_commit_planes(dev, state,
5f4df0c7 LY	129	DRM_PLANE_COMMIT_ACTIVE_ONLY \|
5f4df0c7 LY	130	DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET);
5f2f9115 LY	131
	132	drm_atomic_helper_commit_modeset_enables(dev, state);
	133
	134	drm_atomic_helper_commit_hw_done(state);
	135
	136	drm_atomic_helper_wait_for_vblanks(dev, state);
	137
	138	drm_atomic_helper_cleanup_planes(dev, state);
	139	}
	140
a4b10cce	141	static const struct drm_mode_config_helper_funcs imx_drm_mode_config_helpers = {
5f2f9115	142	.atomic_commit_tail = imx_drm_atomic_commit_tail,
1df8b530 RK	143	};
1df8b530 RK	144
e692da4d	145
6457b971 RK	146	int imx_drm_encoder_parse_of(struct drm_device *drm,
6457b971 RK	147	struct drm_encoder encoder, struct device_node np)
9e2d410d	148	{
6457b971	149	uint32_t crtc_mask = drm_of_find_possible_crtcs(drm, np);
9e2d410d	150
6457b971 RK	151	/*
	152	* If we failed to find the CRTC(s) which this encoder is
	153	* supposed to be connected to, it's because the CRTC has
	154	* not been registered yet. Defer probing, and hope that
	155	* the required CRTC is added later.
	156	*/
	157	if (crtc_mask == 0)
	158	return -EPROBE_DEFER;
655b43cc	159
6457b971	160	encoder->possible_crtcs = crtc_mask;
63bc5164	161
6457b971 RK	162	/* FIXME: this is the mask of outputs which can clone this output. */
6457b971 RK	163	encoder->possible_clones = ~0;
9e2d410d RK	164
	165	return 0;
	166	}
6457b971	167	EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);
9e2d410d	168
baa70943	169	static const struct drm_ioctl_desc imx_drm_ioctls[] = {
e692da4d SH	170	/* none so far */
	171	};
	172
	173	static struct drm_driver imx_drm_driver = {
8535c022 LY	174	.driver_features = DRIVER_MODESET \| DRIVER_GEM \| DRIVER_PRIME \|
8535c022 LY	175	DRIVER_ATOMIC,
e692da4d	176	.lastclose = imx_drm_driver_lastclose,
4b193663	177	.gem_free_object_unlocked = drm_gem_cma_free_object,
e692da4d SH	178	.gem_vm_ops = &drm_gem_cma_vm_ops,
	179	.dumb_create = drm_gem_cma_dumb_create,
	180	.dumb_map_offset = drm_gem_cma_dumb_map_offset,
43387b37	181	.dumb_destroy = drm_gem_dumb_destroy,
e692da4d	182
bd3665c9 PZ	183	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	184	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	185	.gem_prime_import = drm_gem_prime_import,
	186	.gem_prime_export = drm_gem_prime_export,
	187	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	188	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	189	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	190	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	191	.gem_prime_mmap = drm_gem_cma_prime_mmap,
e692da4d SH	192	.ioctls = imx_drm_ioctls,
	193	.num_ioctls = ARRAY_SIZE(imx_drm_ioctls),
	194	.fops = &imx_drm_driver_fops,
	195	.name = "imx-drm",
	196	.desc = "i.MX DRM graphics",
	197	.date = "20120507",
	198	.major = 1,
	199	.minor = 0,
	200	.patchlevel = 0,
	201	};
	202
17b5001b RK	203	static int compare_of(struct device dev, void data)
17b5001b RK	204	{
655b43cc	205	struct device_node *np = data;
17b5001b	206
310944d1 PZ	207	/* Special case for DI, dev->of_node may not be set yet */
	208	if (strcmp(dev->driver->name, "imx-ipuv3-crtc") == 0) {
	209	struct ipu_client_platformdata *pdata = dev->platform_data;
	210
	211	return pdata->of_node == np;
	212	}
	213
655b43cc PZ	214	/* Special case for LDB, one device for two channels */
	215	if (of_node_cmp(np->name, "lvds-channel") == 0) {
	216	np = of_get_parent(np);
	217	of_node_put(np);
17b5001b RK	218	}
17b5001b RK	219
655b43cc PZ	220	return dev->of_node == np;
655b43cc PZ	221	}
17b5001b	222
17b5001b RK	223	static int imx_drm_bind(struct device *dev)
17b5001b RK	224	{
54db5dec LS	225	struct drm_device *drm;
	226	struct imx_drm_device *imxdrm;
	227	int ret;
	228
	229	drm = drm_dev_alloc(&imx_drm_driver, dev);
8cca3548 DC	230	if (IS_ERR(drm))
8cca3548 DC	231	return PTR_ERR(drm);
54db5dec LS	232
	233	imxdrm = devm_kzalloc(dev, sizeof(*imxdrm), GFP_KERNEL);
	234	if (!imxdrm) {
	235	ret = -ENOMEM;
	236	goto err_unref;
	237	}
	238
	239	imxdrm->drm = drm;
	240	drm->dev_private = imxdrm;
	241
	242	/*
	243	* enable drm irq mode.
	244	* - with irq_enabled = true, we can use the vblank feature.
	245	*
	246	* P.S. note that we wouldn't use drm irq handler but
	247	* just specific driver own one instead because
	248	* drm framework supports only one irq handler and
	249	* drivers can well take care of their interrupts
	250	*/
	251	drm->irq_enabled = true;
	252
	253	/*
	254	* set max width and height as default value(4096x4096).
	255	* this value would be used to check framebuffer size limitation
	256	* at drm_mode_addfb().
	257	*/
f57c511a PZ	258	drm->mode_config.min_width = 1;
f57c511a PZ	259	drm->mode_config.min_height = 1;
54db5dec LS	260	drm->mode_config.max_width = 4096;
	261	drm->mode_config.max_height = 4096;
	262	drm->mode_config.funcs = &imx_drm_mode_config_funcs;
	263	drm->mode_config.helper_private = &imx_drm_mode_config_helpers;
	264
	265	drm_mode_config_init(drm);
	266
	267	ret = drm_vblank_init(drm, MAX_CRTC);
	268	if (ret)
	269	goto err_kms;
	270
	271	dev_set_drvdata(dev, drm);
	272
	273	/* Now try and bind all our sub-components */
	274	ret = component_bind_all(dev, drm);
	275	if (ret)
	276	goto err_vblank;
	277
	278	drm_mode_config_reset(drm);
	279
	280	/*
	281	* All components are now initialised, so setup the fb helper.
	282	* The fb helper takes copies of key hardware information, so the
	283	* crtcs/connectors/encoders must not change after this point.
	284	*/
	285	#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
	286	if (legacyfb_depth != 16 && legacyfb_depth != 32) {
	287	dev_warn(dev, "Invalid legacyfb_depth. Defaulting to 16bpp\n");
	288	legacyfb_depth = 16;
	289	}
e4563f6b	290	imxdrm->fbhelper = drm_fbdev_cma_init(drm, legacyfb_depth, MAX_CRTC);
54db5dec LS	291	if (IS_ERR(imxdrm->fbhelper)) {
	292	ret = PTR_ERR(imxdrm->fbhelper);
	293	imxdrm->fbhelper = NULL;
	294	goto err_unbind;
	295	}
	296	#endif
	297
	298	drm_kms_helper_poll_init(drm);
	299
	300	ret = drm_dev_register(drm, 0);
	301	if (ret)
	302	goto err_fbhelper;
	303
	304	return 0;
	305
	306	err_fbhelper:
	307	drm_kms_helper_poll_fini(drm);
3e3affe5	308	#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
54db5dec LS	309	if (imxdrm->fbhelper)
	310	drm_fbdev_cma_fini(imxdrm->fbhelper);
	311	err_unbind:
3e3affe5	312	#endif
54db5dec LS	313	component_unbind_all(drm->dev, drm);
	314	err_vblank:
	315	drm_vblank_cleanup(drm);
	316	err_kms:
	317	drm_mode_config_cleanup(drm);
	318	err_unref:
	319	drm_dev_unref(drm);
	320
	321	return ret;
17b5001b RK	322	}
	323
	324	static void imx_drm_unbind(struct device *dev)
	325	{
54db5dec LS	326	struct drm_device *drm = dev_get_drvdata(dev);
	327	struct imx_drm_device *imxdrm = drm->dev_private;
	328
	329	drm_dev_unregister(drm);
	330
	331	drm_kms_helper_poll_fini(drm);
	332
	333	if (imxdrm->fbhelper)
	334	drm_fbdev_cma_fini(imxdrm->fbhelper);
	335
8e3b16e2 LS	336	drm_mode_config_cleanup(drm);
8e3b16e2 LS	337
54db5dec LS	338	component_unbind_all(drm->dev, drm);
	339	dev_set_drvdata(dev, NULL);
	340
54db5dec	341	drm_dev_unref(drm);
17b5001b RK	342	}
	343
	344	static const struct component_master_ops imx_drm_ops = {
17b5001b RK	345	.bind = imx_drm_bind,
	346	.unbind = imx_drm_unbind,
	347	};
	348
e692da4d SH	349	static int imx_drm_platform_probe(struct platform_device *pdev)
e692da4d SH	350	{
9cace32f	351	int ret = drm_of_component_probe(&pdev->dev, compare_of, &imx_drm_ops);
655b43cc	352
9cace32f LD	353	if (!ret)
9cace32f LD	354	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
655b43cc	355
9cace32f	356	return ret;
e692da4d SH	357	}
	358
	359	static int imx_drm_platform_remove(struct platform_device *pdev)
	360	{
17b5001b	361	component_master_del(&pdev->dev, &imx_drm_ops);
e692da4d SH	362	return 0;
	363	}
	364
bfe945c8 SG	365	#ifdef CONFIG_PM_SLEEP
	366	static int imx_drm_suspend(struct device *dev)
	367	{
	368	struct drm_device *drm_dev = dev_get_drvdata(dev);
5f2f9115	369	struct imx_drm_device *imxdrm;
bfe945c8 SG	370
	371	/* The drm_dev is NULL before .load hook is called */
	372	if (drm_dev == NULL)
	373	return 0;
	374
	375	drm_kms_helper_poll_disable(drm_dev);
	376
5f2f9115 LY	377	imxdrm = drm_dev->dev_private;
	378	imxdrm->state = drm_atomic_helper_suspend(drm_dev);
	379	if (IS_ERR(imxdrm->state)) {
	380	drm_kms_helper_poll_enable(drm_dev);
	381	return PTR_ERR(imxdrm->state);
	382	}
	383
bfe945c8 SG	384	return 0;
	385	}
	386
	387	static int imx_drm_resume(struct device *dev)
	388	{
	389	struct drm_device *drm_dev = dev_get_drvdata(dev);
5f2f9115	390	struct imx_drm_device *imx_drm;
bfe945c8 SG	391
	392	if (drm_dev == NULL)
	393	return 0;
	394
5f2f9115 LY	395	imx_drm = drm_dev->dev_private;
5f2f9115 LY	396	drm_atomic_helper_resume(drm_dev, imx_drm->state);
bfe945c8 SG	397	drm_kms_helper_poll_enable(drm_dev);
	398
	399	return 0;
	400	}
	401	#endif
	402
	403	static SIMPLE_DEV_PM_OPS(imx_drm_pm_ops, imx_drm_suspend, imx_drm_resume);
	404
17b5001b	405	static const struct of_device_id imx_drm_dt_ids[] = {
655b43cc	406	{ .compatible = "fsl,imx-display-subsystem", },
17b5001b RK	407	{ /* sentinel */ },
	408	};
	409	MODULE_DEVICE_TABLE(of, imx_drm_dt_ids);
	410
e692da4d SH	411	static struct platform_driver imx_drm_pdrv = {
e692da4d SH	412	.probe = imx_drm_platform_probe,
99c28f10	413	.remove = imx_drm_platform_remove,
e692da4d	414	.driver = {
e692da4d	415	.name = "imx-drm",
bfe945c8	416	.pm = &imx_drm_pm_ops,
17b5001b	417	.of_match_table = imx_drm_dt_ids,
e692da4d SH	418	},
e692da4d SH	419	};
b85f2b5d	420	module_platform_driver(imx_drm_pdrv);
e692da4d SH	421
	422	MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
	423	MODULE_DESCRIPTION("i.MX drm driver core");
	424	MODULE_LICENSE("GPL");