[mirror_ubuntu-bionic-kernel.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_gem_framebuffer_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"
#include "ipuv3-plane.h"

#define MAX_CRTC	4

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);
}

DEFINE_DRM_GEM_CMA_FOPS(imx_drm_driver_fops);

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;

	/* Assign PRG/PRE channels and check if all constrains are satisfied. */
	ret = ipu_planes_assign_pre(dev, state);
	if (ret)
		return ret;

	return ret;
}

static const struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
	.fb_create = drm_gem_fb_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;
	struct drm_plane *plane;
	struct drm_plane_state *old_plane_state, *new_plane_state;
	bool plane_disabling = false;
	int i;

	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);

	for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
		if (drm_atomic_plane_disabling(old_plane_state, new_plane_state))
			plane_disabling = true;
	}

	/*
	 * The flip done wait is only strictly required by imx-drm if a deferred
	 * plane disable is in-flight. As the core requires blocking commits
	 * to wait for the flip it is done here unconditionally. This keeps the
	 * workitem around a bit longer than required for the majority of
	 * non-blocking commits, but we accept that for the sake of simplicity.
	 */
	drm_atomic_helper_wait_for_flip_done(dev, state);

	if (plane_disabling) {
		for_each_old_plane_in_state(state, plane, old_plane_state, i)
			ipu_plane_disable_deferred(plane);

	}

	drm_atomic_helper_commit_hw_done(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,

	.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_kms;

	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_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,
	},
};

static struct platform_driver * const drivers[] = {
	&imx_drm_pdrv,
	&ipu_drm_driver,
};

static int __init imx_drm_init(void)
{
	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
}
module_init(imx_drm_init);

static void __exit imx_drm_exit(void)
{
	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
}
module_exit(imx_drm_exit);

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	26	#include <drm/drm_gem_cma_helper.h>
bd106353	27	#include <drm/drm_gem_framebuffer_helper.h>
e692da4d	28	#include <drm/drm_fb_cma_helper.h>
3cb9ae4f	29	#include <drm/drm_plane_helper.h>
6457b971	30	#include <drm/drm_of.h>
310944d1	31	#include <video/imx-ipu-v3.h>
e692da4d SH	32
e692da4d SH	33	#include "imx-drm.h"
eb8c8880	34	#include "ipuv3-plane.h"
e692da4d SH	35
	36	#define MAX_CRTC 4
	37
e692da4d SH	38	struct imx_drm_device {
e692da4d SH	39	struct drm_device *drm;
d2ab8ad9	40	unsigned int pipes;
e692da4d	41	struct drm_fbdev_cma *fbhelper;
5f2f9115	42	struct drm_atomic_state *state;
e692da4d SH	43	};
e692da4d SH	44
c1ff5a7a	45	#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
8acba02f RK	46	static int legacyfb_depth = 16;
8acba02f RK	47	module_param(legacyfb_depth, int, 0444);
c1ff5a7a	48	#endif
8acba02f	49
e692da4d SH	50	static void imx_drm_driver_lastclose(struct drm_device *drm)
	51	{
	52	struct imx_drm_device *imxdrm = drm->dev_private;
	53
3f3a7280	54	drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
e692da4d SH	55	}
e692da4d SH	56
d55f7e5d	57	DEFINE_DRM_GEM_CMA_FOPS(imx_drm_driver_fops);
e692da4d	58
8a51a33b RK	59	void imx_drm_connector_destroy(struct drm_connector *connector)
8a51a33b RK	60	{
34ea3d38	61	drm_connector_unregister(connector);
8a51a33b RK	62	drm_connector_cleanup(connector);
	63	}
	64	EXPORT_SYMBOL_GPL(imx_drm_connector_destroy);
	65
	66	void imx_drm_encoder_destroy(struct drm_encoder *encoder)
	67	{
	68	drm_encoder_cleanup(encoder);
	69	}
	70	EXPORT_SYMBOL_GPL(imx_drm_encoder_destroy);
	71
3e68439b RK	72	static void imx_drm_output_poll_changed(struct drm_device *drm)
3e68439b RK	73	{
3e68439b RK	74	struct imx_drm_device *imxdrm = drm->dev_private;
	75
	76	drm_fbdev_cma_hotplug_event(imxdrm->fbhelper);
3e68439b RK	77	}
3e68439b RK	78
1780999c LY	79	static int imx_drm_atomic_check(struct drm_device *dev,
	80	struct drm_atomic_state *state)
	81	{
	82	int ret;
	83
	84	ret = drm_atomic_helper_check_modeset(dev, state);
	85	if (ret)
	86	return ret;
	87
	88	ret = drm_atomic_helper_check_planes(dev, state);
	89	if (ret)
	90	return ret;
	91
	92	/*
	93	* Check modeset again in case crtc_state->mode_changed is
	94	* updated in plane's ->atomic_check callback.
	95	*/
	96	ret = drm_atomic_helper_check_modeset(dev, state);
	97	if (ret)
	98	return ret;
	99
00514e85 LS	100	/* Assign PRG/PRE channels and check if all constrains are satisfied. */
	101	ret = ipu_planes_assign_pre(dev, state);
	102	if (ret)
	103	return ret;
	104
1780999c LY	105	return ret;
	106	}
	107
7ae847dd	108	static const struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
bd106353	109	.fb_create = drm_gem_fb_create,
3e68439b	110	.output_poll_changed = imx_drm_output_poll_changed,
1780999c	111	.atomic_check = imx_drm_atomic_check,
782ea2a4	112	.atomic_commit = drm_atomic_helper_commit,
5f2f9115 LY	113	};
	114
	115	static void imx_drm_atomic_commit_tail(struct drm_atomic_state *state)
	116	{
	117	struct drm_device *dev = state->dev;
eb8c8880	118	struct drm_plane *plane;
30ea7521	119	struct drm_plane_state old_plane_state, new_plane_state;
eb8c8880 PZ	120	bool plane_disabling = false;
eb8c8880 PZ	121	int i;
5f2f9115 LY	122
	123	drm_atomic_helper_commit_modeset_disables(dev, state);
	124
2b58e98d	125	drm_atomic_helper_commit_planes(dev, state,
5f4df0c7 LY	126	DRM_PLANE_COMMIT_ACTIVE_ONLY \|
5f4df0c7 LY	127	DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET);
5f2f9115 LY	128
	129	drm_atomic_helper_commit_modeset_enables(dev, state);
	130
30ea7521 ML	131	for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
30ea7521 ML	132	if (drm_atomic_plane_disabling(old_plane_state, new_plane_state))
eb8c8880 PZ	133	plane_disabling = true;
	134	}
	135
a1529920 LS	136	/*
	137	* The flip done wait is only strictly required by imx-drm if a deferred
	138	* plane disable is in-flight. As the core requires blocking commits
	139	* to wait for the flip it is done here unconditionally. This keeps the
	140	* workitem around a bit longer than required for the majority of
	141	* non-blocking commits, but we accept that for the sake of simplicity.
	142	*/
	143	drm_atomic_helper_wait_for_flip_done(dev, state);
eb8c8880	144
a1529920	145	if (plane_disabling) {
30ea7521	146	for_each_old_plane_in_state(state, plane, old_plane_state, i)
eb8c8880 PZ	147	ipu_plane_disable_deferred(plane);
	148
	149	}
	150
5f2f9115	151	drm_atomic_helper_commit_hw_done(state);
5f2f9115 LY	152	}
5f2f9115 LY	153
a4b10cce	154	static const struct drm_mode_config_helper_funcs imx_drm_mode_config_helpers = {
5f2f9115	155	.atomic_commit_tail = imx_drm_atomic_commit_tail,
1df8b530 RK	156	};
1df8b530 RK	157
e692da4d	158
6457b971 RK	159	int imx_drm_encoder_parse_of(struct drm_device *drm,
6457b971 RK	160	struct drm_encoder encoder, struct device_node np)
9e2d410d	161	{
6457b971	162	uint32_t crtc_mask = drm_of_find_possible_crtcs(drm, np);
9e2d410d	163
6457b971 RK	164	/*
	165	* If we failed to find the CRTC(s) which this encoder is
	166	* supposed to be connected to, it's because the CRTC has
	167	* not been registered yet. Defer probing, and hope that
	168	* the required CRTC is added later.
	169	*/
	170	if (crtc_mask == 0)
	171	return -EPROBE_DEFER;
655b43cc	172
6457b971	173	encoder->possible_crtcs = crtc_mask;
63bc5164	174
6457b971 RK	175	/* FIXME: this is the mask of outputs which can clone this output. */
6457b971 RK	176	encoder->possible_clones = ~0;
9e2d410d RK	177
	178	return 0;
	179	}
6457b971	180	EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);
9e2d410d	181
baa70943	182	static const struct drm_ioctl_desc imx_drm_ioctls[] = {
e692da4d SH	183	/* none so far */
	184	};
	185
	186	static struct drm_driver imx_drm_driver = {
8535c022 LY	187	.driver_features = DRIVER_MODESET \| DRIVER_GEM \| DRIVER_PRIME \|
8535c022 LY	188	DRIVER_ATOMIC,
e692da4d	189	.lastclose = imx_drm_driver_lastclose,
4b193663	190	.gem_free_object_unlocked = drm_gem_cma_free_object,
e692da4d SH	191	.gem_vm_ops = &drm_gem_cma_vm_ops,
e692da4d SH	192	.dumb_create = drm_gem_cma_dumb_create,
e692da4d	193
bd3665c9 PZ	194	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	195	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	196	.gem_prime_import = drm_gem_prime_import,
	197	.gem_prime_export = drm_gem_prime_export,
	198	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	199	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	200	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	201	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	202	.gem_prime_mmap = drm_gem_cma_prime_mmap,
e692da4d SH	203	.ioctls = imx_drm_ioctls,
	204	.num_ioctls = ARRAY_SIZE(imx_drm_ioctls),
	205	.fops = &imx_drm_driver_fops,
	206	.name = "imx-drm",
	207	.desc = "i.MX DRM graphics",
	208	.date = "20120507",
	209	.major = 1,
	210	.minor = 0,
	211	.patchlevel = 0,
	212	};
	213
17b5001b RK	214	static int compare_of(struct device dev, void data)
17b5001b RK	215	{
655b43cc	216	struct device_node *np = data;
17b5001b	217
310944d1 PZ	218	/* Special case for DI, dev->of_node may not be set yet */
	219	if (strcmp(dev->driver->name, "imx-ipuv3-crtc") == 0) {
	220	struct ipu_client_platformdata *pdata = dev->platform_data;
	221
	222	return pdata->of_node == np;
	223	}
	224
655b43cc PZ	225	/* Special case for LDB, one device for two channels */
	226	if (of_node_cmp(np->name, "lvds-channel") == 0) {
	227	np = of_get_parent(np);
	228	of_node_put(np);
17b5001b RK	229	}
17b5001b RK	230
655b43cc PZ	231	return dev->of_node == np;
655b43cc PZ	232	}
17b5001b	233
17b5001b RK	234	static int imx_drm_bind(struct device *dev)
17b5001b RK	235	{
54db5dec LS	236	struct drm_device *drm;
	237	struct imx_drm_device *imxdrm;
	238	int ret;
	239
	240	drm = drm_dev_alloc(&imx_drm_driver, dev);
8cca3548 DC	241	if (IS_ERR(drm))
8cca3548 DC	242	return PTR_ERR(drm);
54db5dec LS	243
	244	imxdrm = devm_kzalloc(dev, sizeof(*imxdrm), GFP_KERNEL);
	245	if (!imxdrm) {
	246	ret = -ENOMEM;
	247	goto err_unref;
	248	}
	249
	250	imxdrm->drm = drm;
	251	drm->dev_private = imxdrm;
	252
	253	/*
	254	* enable drm irq mode.
	255	* - with irq_enabled = true, we can use the vblank feature.
	256	*
	257	* P.S. note that we wouldn't use drm irq handler but
	258	* just specific driver own one instead because
	259	* drm framework supports only one irq handler and
	260	* drivers can well take care of their interrupts
	261	*/
	262	drm->irq_enabled = true;
	263
	264	/*
	265	* set max width and height as default value(4096x4096).
	266	* this value would be used to check framebuffer size limitation
	267	* at drm_mode_addfb().
	268	*/
f57c511a PZ	269	drm->mode_config.min_width = 1;
f57c511a PZ	270	drm->mode_config.min_height = 1;
54db5dec LS	271	drm->mode_config.max_width = 4096;
	272	drm->mode_config.max_height = 4096;
	273	drm->mode_config.funcs = &imx_drm_mode_config_funcs;
	274	drm->mode_config.helper_private = &imx_drm_mode_config_helpers;
	275
	276	drm_mode_config_init(drm);
	277
	278	ret = drm_vblank_init(drm, MAX_CRTC);
	279	if (ret)
	280	goto err_kms;
	281
	282	dev_set_drvdata(dev, drm);
	283
	284	/* Now try and bind all our sub-components */
	285	ret = component_bind_all(dev, drm);
	286	if (ret)
85769cf7	287	goto err_kms;
54db5dec LS	288
	289	drm_mode_config_reset(drm);
	290
	291	/*
	292	* All components are now initialised, so setup the fb helper.
	293	* The fb helper takes copies of key hardware information, so the
	294	* crtcs/connectors/encoders must not change after this point.
	295	*/
	296	#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
	297	if (legacyfb_depth != 16 && legacyfb_depth != 32) {
	298	dev_warn(dev, "Invalid legacyfb_depth. Defaulting to 16bpp\n");
	299	legacyfb_depth = 16;
	300	}
e4563f6b	301	imxdrm->fbhelper = drm_fbdev_cma_init(drm, legacyfb_depth, MAX_CRTC);
54db5dec LS	302	if (IS_ERR(imxdrm->fbhelper)) {
	303	ret = PTR_ERR(imxdrm->fbhelper);
	304	imxdrm->fbhelper = NULL;
	305	goto err_unbind;
	306	}
	307	#endif
	308
	309	drm_kms_helper_poll_init(drm);
	310
	311	ret = drm_dev_register(drm, 0);
	312	if (ret)
	313	goto err_fbhelper;
	314
	315	return 0;
	316
	317	err_fbhelper:
	318	drm_kms_helper_poll_fini(drm);
3e3affe5	319	#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
54db5dec LS	320	if (imxdrm->fbhelper)
	321	drm_fbdev_cma_fini(imxdrm->fbhelper);
	322	err_unbind:
3e3affe5	323	#endif
54db5dec	324	component_unbind_all(drm->dev, drm);
54db5dec LS	325	err_kms:
	326	drm_mode_config_cleanup(drm);
	327	err_unref:
	328	drm_dev_unref(drm);
	329
	330	return ret;
17b5001b RK	331	}
	332
	333	static void imx_drm_unbind(struct device *dev)
	334	{
54db5dec LS	335	struct drm_device *drm = dev_get_drvdata(dev);
	336	struct imx_drm_device *imxdrm = drm->dev_private;
	337
	338	drm_dev_unregister(drm);
	339
	340	drm_kms_helper_poll_fini(drm);
	341
	342	if (imxdrm->fbhelper)
	343	drm_fbdev_cma_fini(imxdrm->fbhelper);
	344
8e3b16e2 LS	345	drm_mode_config_cleanup(drm);
8e3b16e2 LS	346
54db5dec LS	347	component_unbind_all(drm->dev, drm);
	348	dev_set_drvdata(dev, NULL);
	349
54db5dec	350	drm_dev_unref(drm);
17b5001b RK	351	}
	352
	353	static const struct component_master_ops imx_drm_ops = {
17b5001b RK	354	.bind = imx_drm_bind,
	355	.unbind = imx_drm_unbind,
	356	};
	357
e692da4d SH	358	static int imx_drm_platform_probe(struct platform_device *pdev)
e692da4d SH	359	{
9cace32f	360	int ret = drm_of_component_probe(&pdev->dev, compare_of, &imx_drm_ops);
655b43cc	361
9cace32f LD	362	if (!ret)
9cace32f LD	363	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
655b43cc	364
9cace32f	365	return ret;
e692da4d SH	366	}
	367
	368	static int imx_drm_platform_remove(struct platform_device *pdev)
	369	{
17b5001b	370	component_master_del(&pdev->dev, &imx_drm_ops);
e692da4d SH	371	return 0;
	372	}
	373
bfe945c8 SG	374	#ifdef CONFIG_PM_SLEEP
	375	static int imx_drm_suspend(struct device *dev)
	376	{
	377	struct drm_device *drm_dev = dev_get_drvdata(dev);
5f2f9115	378	struct imx_drm_device *imxdrm;
bfe945c8 SG	379
	380	/* The drm_dev is NULL before .load hook is called */
	381	if (drm_dev == NULL)
	382	return 0;
	383
	384	drm_kms_helper_poll_disable(drm_dev);
	385
5f2f9115 LY	386	imxdrm = drm_dev->dev_private;
	387	imxdrm->state = drm_atomic_helper_suspend(drm_dev);
	388	if (IS_ERR(imxdrm->state)) {
	389	drm_kms_helper_poll_enable(drm_dev);
	390	return PTR_ERR(imxdrm->state);
	391	}
	392
bfe945c8 SG	393	return 0;
	394	}
	395
	396	static int imx_drm_resume(struct device *dev)
	397	{
	398	struct drm_device *drm_dev = dev_get_drvdata(dev);
5f2f9115	399	struct imx_drm_device *imx_drm;
bfe945c8 SG	400
	401	if (drm_dev == NULL)
	402	return 0;
	403
5f2f9115 LY	404	imx_drm = drm_dev->dev_private;
5f2f9115 LY	405	drm_atomic_helper_resume(drm_dev, imx_drm->state);
bfe945c8 SG	406	drm_kms_helper_poll_enable(drm_dev);
	407
	408	return 0;
	409	}
	410	#endif
	411
	412	static SIMPLE_DEV_PM_OPS(imx_drm_pm_ops, imx_drm_suspend, imx_drm_resume);
	413
17b5001b	414	static const struct of_device_id imx_drm_dt_ids[] = {
655b43cc	415	{ .compatible = "fsl,imx-display-subsystem", },
17b5001b RK	416	{ /* sentinel */ },
	417	};
	418	MODULE_DEVICE_TABLE(of, imx_drm_dt_ids);
	419
e692da4d SH	420	static struct platform_driver imx_drm_pdrv = {
e692da4d SH	421	.probe = imx_drm_platform_probe,
99c28f10	422	.remove = imx_drm_platform_remove,
e692da4d	423	.driver = {
e692da4d	424	.name = "imx-drm",
bfe945c8	425	.pm = &imx_drm_pm_ops,
17b5001b	426	.of_match_table = imx_drm_dt_ids,
e692da4d SH	427	},
e692da4d SH	428	};
3d1df96a LS	429
	430	static struct platform_driver * const drivers[] = {
	431	&imx_drm_pdrv,
	432	&ipu_drm_driver,
	433	};
	434
	435	static int __init imx_drm_init(void)
	436	{
	437	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
	438	}
	439	module_init(imx_drm_init);
	440
	441	static void __exit imx_drm_exit(void)
	442	{
	443	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
	444	}
	445	module_exit(imx_drm_exit);
e692da4d SH	446
	447	MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
	448	MODULE_DESCRIPTION("i.MX drm driver core");
	449	MODULE_LICENSE("GPL");