[linux-2.6-block.git] / drivers / gpu / drm / meson / meson_drv.c

/*
 * Copyright (C) 2016 BayLibre, SAS
 * Author: Neil Armstrong <narmstrong@baylibre.com>
 * Copyright (C) 2014 Endless Mobile
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 * Written by:
 *     Jasper St. Pierre <jstpierre@mecheye.net>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/component.h>
#include <linux/of_graph.h>

#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_flip_work.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_plane_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_rect.h>
#include <drm/drm_fb_helper.h>

#include "meson_drv.h"
#include "meson_plane.h"
#include "meson_crtc.h"
#include "meson_venc_cvbs.h"

#include "meson_vpp.h"
#include "meson_viu.h"
#include "meson_venc.h"
#include "meson_canvas.h"
#include "meson_registers.h"

#define DRIVER_NAME "meson"
#define DRIVER_DESC "Amlogic Meson DRM driver"

/**
 * DOC: Video Processing Unit
 *
 * VPU Handles the Global Video Processing, it includes management of the
 * clocks gates, blocks reset lines and power domains.
 *
 * What is missing :
 *
 * - Full reset of entire video processing HW blocks
 * - Scaling and setup of the VPU clock
 * - Bus clock gates
 * - Powering up video processing HW blocks
 * - Powering Up HDMI controller and PHY
 */

static void meson_fb_output_poll_changed(struct drm_device *dev)
{
	struct meson_drm *priv = dev->dev_private;

	drm_fbdev_cma_hotplug_event(priv->fbdev);
}

static const struct drm_mode_config_funcs meson_mode_config_funcs = {
	.output_poll_changed = meson_fb_output_poll_changed,
	.atomic_check        = drm_atomic_helper_check,
	.atomic_commit       = drm_atomic_helper_commit,
	.fb_create           = drm_gem_fb_create,
};

static irqreturn_t meson_irq(int irq, void *arg)
{
	struct drm_device *dev = arg;
	struct meson_drm *priv = dev->dev_private;

	(void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));

	meson_crtc_irq(priv);

	return IRQ_HANDLED;
}

DEFINE_DRM_GEM_CMA_FOPS(fops);

static struct drm_driver meson_driver = {
	.driver_features	= DRIVER_HAVE_IRQ | DRIVER_GEM |
				  DRIVER_MODESET | DRIVER_PRIME |
				  DRIVER_ATOMIC,

	/* IRQ */
	.irq_handler		= meson_irq,

	/* PRIME Ops */
	.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,

	/* GEM Ops */
	.dumb_create		= drm_gem_cma_dumb_create,
	.gem_free_object_unlocked = drm_gem_cma_free_object,
	.gem_vm_ops		= &drm_gem_cma_vm_ops,

	/* Misc */
	.fops			= &fops,
	.name			= DRIVER_NAME,
	.desc			= DRIVER_DESC,
	.date			= "20161109",
	.major			= 1,
	.minor			= 0,
};

static bool meson_vpu_has_available_connectors(struct device *dev)
{
	struct device_node *ep, *remote;

	/* Parses each endpoint and check if remote exists */
	for_each_endpoint_of_node(dev->of_node, ep) {
		/* If the endpoint node exists, consider it enabled */
		remote = of_graph_get_remote_port(ep);
		if (remote)
			return true;
	}

	return false;
}

static struct regmap_config meson_regmap_config = {
	.reg_bits       = 32,
	.val_bits       = 32,
	.reg_stride     = 4,
	.max_register   = 0x1000,
};

static int meson_drv_bind_master(struct device *dev, bool has_components)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct meson_drm *priv;
	struct drm_device *drm;
	struct resource *res;
	void __iomem *regs;
	int ret;

	/* Checks if an output connector is available */
	if (!meson_vpu_has_available_connectors(dev)) {
		dev_err(dev, "No output connector available\n");
		return -ENODEV;
	}

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

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		ret = -ENOMEM;
		goto free_drm;
	}
	drm->dev_private = priv;
	priv->drm = drm;
	priv->dev = dev;

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
	regs = devm_ioremap_resource(dev, res);
	if (IS_ERR(regs))
		return PTR_ERR(regs);

	priv->io_base = regs;

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
	/* Simply ioremap since it may be a shared register zone */
	regs = devm_ioremap(dev, res->start, resource_size(res));
	if (!regs)
		return -EADDRNOTAVAIL;

	priv->hhi = devm_regmap_init_mmio(dev, regs,
					  &meson_regmap_config);
	if (IS_ERR(priv->hhi)) {
		dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
		return PTR_ERR(priv->hhi);
	}

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
	/* Simply ioremap since it may be a shared register zone */
	regs = devm_ioremap(dev, res->start, resource_size(res));
	if (!regs)
		return -EADDRNOTAVAIL;

	priv->dmc = devm_regmap_init_mmio(dev, regs,
					  &meson_regmap_config);
	if (IS_ERR(priv->dmc)) {
		dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
		return PTR_ERR(priv->dmc);
	}

	priv->vsync_irq = platform_get_irq(pdev, 0);

	drm_vblank_init(drm, 1);
	drm_mode_config_init(drm);
	drm->mode_config.max_width = 3840;
	drm->mode_config.max_height = 2160;
	drm->mode_config.funcs = &meson_mode_config_funcs;

	/* Hardware Initialization */

	meson_venc_init(priv);
	meson_vpp_init(priv);
	meson_viu_init(priv);

	/* Encoder Initialization */

	ret = meson_venc_cvbs_create(priv);
	if (ret)
		goto free_drm;

	if (has_components) {
		ret = component_bind_all(drm->dev, drm);
		if (ret) {
			dev_err(drm->dev, "Couldn't bind all components\n");
			goto free_drm;
		}
	}

	ret = meson_plane_create(priv);
	if (ret)
		goto free_drm;

	ret = meson_crtc_create(priv);
	if (ret)
		goto free_drm;

	ret = drm_irq_install(drm, priv->vsync_irq);
	if (ret)
		goto free_drm;

	drm_mode_config_reset(drm);

	priv->fbdev = drm_fbdev_cma_init(drm, 32,
					 drm->mode_config.num_connector);
	if (IS_ERR(priv->fbdev)) {
		ret = PTR_ERR(priv->fbdev);
		goto free_drm;
	}

	drm_kms_helper_poll_init(drm);

	platform_set_drvdata(pdev, priv);

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

	return 0;

free_drm:
	drm_dev_unref(drm);

	return ret;
}

static int meson_drv_bind(struct device *dev)
{
	return meson_drv_bind_master(dev, true);
}

static void meson_drv_unbind(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct meson_drm *priv = drm->dev_private;

	drm_dev_unregister(drm);
	drm_kms_helper_poll_fini(drm);
	drm_fbdev_cma_fini(priv->fbdev);
	drm_mode_config_cleanup(drm);
	drm_dev_unref(drm);

}

static const struct component_master_ops meson_drv_master_ops = {
	.bind	= meson_drv_bind,
	.unbind	= meson_drv_unbind,
};

static int compare_of(struct device *dev, void *data)
{
	DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
			 dev->of_node, data);

	return dev->of_node == data;
}

/* Possible connectors nodes to ignore */
static const struct of_device_id connectors_match[] = {
	{ .compatible = "composite-video-connector" },
	{ .compatible = "svideo-connector" },
	{ .compatible = "hdmi-connector" },
	{ .compatible = "dvi-connector" },
	{}
};

static int meson_probe_remote(struct platform_device *pdev,
			      struct component_match **match,
			      struct device_node *parent,
			      struct device_node *remote)
{
	struct device_node *ep, *remote_node;
	int count = 1;

	/* If node is a connector, return and do not add to match table */
	if (of_match_node(connectors_match, remote))
		return 1;

	component_match_add(&pdev->dev, match, compare_of, remote);

	for_each_endpoint_of_node(remote, ep) {
		remote_node = of_graph_get_remote_port_parent(ep);
		if (!remote_node ||
		    remote_node == parent || /* Ignore parent endpoint */
		    !of_device_is_available(remote_node))
			continue;

		count += meson_probe_remote(pdev, match, remote, remote_node);

		of_node_put(remote_node);
	}

	return count;
}

static int meson_drv_probe(struct platform_device *pdev)
{
	struct component_match *match = NULL;
	struct device_node *np = pdev->dev.of_node;
	struct device_node *ep, *remote;
	int count = 0;

	for_each_endpoint_of_node(np, ep) {
		remote = of_graph_get_remote_port_parent(ep);
		if (!remote || !of_device_is_available(remote))
			continue;

		count += meson_probe_remote(pdev, &match, np, remote);
	}

	if (count && !match)
		return meson_drv_bind_master(&pdev->dev, false);

	/* If some endpoints were found, initialize the nodes */
	if (count) {
		dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);

		return component_master_add_with_match(&pdev->dev,
						       &meson_drv_master_ops,
						       match);
	}

	/* If no output endpoints were available, simply bail out */
	return 0;
};

static const struct of_device_id dt_match[] = {
	{ .compatible = "amlogic,meson-gxbb-vpu" },
	{ .compatible = "amlogic,meson-gxl-vpu" },
	{ .compatible = "amlogic,meson-gxm-vpu" },
	{}
};
MODULE_DEVICE_TABLE(of, dt_match);

static struct platform_driver meson_drm_platform_driver = {
	.probe      = meson_drv_probe,
	.driver     = {
		.name	= "meson-drm",
		.of_match_table = dt_match,
	},
};

module_platform_driver(meson_drm_platform_driver);

MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
Commit	Line	Data
bbbe775e NA	1	/*
	2	* Copyright (C) 2016 BayLibre, SAS
	3	* Author: Neil Armstrong <narmstrong@baylibre.com>
	4	* Copyright (C) 2014 Endless Mobile
	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 as
	8	* published by the Free Software Foundation; either version 2 of the
	9	* License, or (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, see <http://www.gnu.org/licenses/>.
	18	*
	19	* Written by:
	20	* Jasper St. Pierre <jstpierre@mecheye.net>
	21	*/
	22
	23	#include <linux/kernel.h>
	24	#include <linux/module.h>
	25	#include <linux/mutex.h>
	26	#include <linux/platform_device.h>
a41e82e6	27	#include <linux/component.h>
bbbe775e NA	28	#include <linux/of_graph.h>
	29
	30	#include <drm/drmP.h>
	31	#include <drm/drm_atomic.h>
	32	#include <drm/drm_atomic_helper.h>
	33	#include <drm/drm_flip_work.h>
	34	#include <drm/drm_crtc_helper.h>
	35	#include <drm/drm_plane_helper.h>
	36	#include <drm/drm_gem_cma_helper.h>
24ef8157	37	#include <drm/drm_gem_framebuffer_helper.h>
bbbe775e NA	38	#include <drm/drm_fb_cma_helper.h>
	39	#include <drm/drm_rect.h>
	40	#include <drm/drm_fb_helper.h>
	41
	42	#include "meson_drv.h"
	43	#include "meson_plane.h"
	44	#include "meson_crtc.h"
	45	#include "meson_venc_cvbs.h"
	46
	47	#include "meson_vpp.h"
	48	#include "meson_viu.h"
	49	#include "meson_venc.h"
	50	#include "meson_canvas.h"
	51	#include "meson_registers.h"
	52
	53	#define DRIVER_NAME "meson"
	54	#define DRIVER_DESC "Amlogic Meson DRM driver"
	55
2021d5b7 NA	56	/**
2021d5b7 NA	57	* DOC: Video Processing Unit
bbbe775e NA	58	*
	59	* VPU Handles the Global Video Processing, it includes management of the
	60	* clocks gates, blocks reset lines and power domains.
	61	*
	62	* What is missing :
2021d5b7	63	*
bbbe775e NA	64	* - Full reset of entire video processing HW blocks
	65	* - Scaling and setup of the VPU clock
	66	* - Bus clock gates
	67	* - Powering up video processing HW blocks
	68	* - Powering Up HDMI controller and PHY
	69	*/
	70
	71	static void meson_fb_output_poll_changed(struct drm_device *dev)
	72	{
	73	struct meson_drm *priv = dev->dev_private;
	74
	75	drm_fbdev_cma_hotplug_event(priv->fbdev);
	76	}
	77
	78	static const struct drm_mode_config_funcs meson_mode_config_funcs = {
	79	.output_poll_changed = meson_fb_output_poll_changed,
	80	.atomic_check = drm_atomic_helper_check,
	81	.atomic_commit = drm_atomic_helper_commit,
24ef8157	82	.fb_create = drm_gem_fb_create,
bbbe775e NA	83	};
bbbe775e NA	84
bbbe775e NA	85	static irqreturn_t meson_irq(int irq, void *arg)
	86	{
	87	struct drm_device *dev = arg;
	88	struct meson_drm *priv = dev->dev_private;
	89
	90	(void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
	91
	92	meson_crtc_irq(priv);
	93
	94	return IRQ_HANDLED;
	95	}
	96
d55f7e5d	97	DEFINE_DRM_GEM_CMA_FOPS(fops);
bbbe775e NA	98
	99	static struct drm_driver meson_driver = {
	100	.driver_features = DRIVER_HAVE_IRQ \| DRIVER_GEM \|
	101	DRIVER_MODESET \| DRIVER_PRIME \|
	102	DRIVER_ATOMIC,
	103
bbbe775e NA	104	/* IRQ */
	105	.irq_handler = meson_irq,
	106
	107	/* PRIME Ops */
	108	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	109	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	110	.gem_prime_import = drm_gem_prime_import,
	111	.gem_prime_export = drm_gem_prime_export,
	112	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
	113	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	114	.gem_prime_vmap = drm_gem_cma_prime_vmap,
	115	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
	116	.gem_prime_mmap = drm_gem_cma_prime_mmap,
	117
	118	/* GEM Ops */
	119	.dumb_create = drm_gem_cma_dumb_create,
bbbe775e NA	120	.gem_free_object_unlocked = drm_gem_cma_free_object,
	121	.gem_vm_ops = &drm_gem_cma_vm_ops,
	122
	123	/* Misc */
	124	.fops = &fops,
	125	.name = DRIVER_NAME,
	126	.desc = DRIVER_DESC,
	127	.date = "20161109",
	128	.major = 1,
	129	.minor = 0,
	130	};
	131
	132	static bool meson_vpu_has_available_connectors(struct device *dev)
	133	{
	134	struct device_node ep, remote;
	135
	136	/* Parses each endpoint and check if remote exists */
	137	for_each_endpoint_of_node(dev->of_node, ep) {
	138	/* If the endpoint node exists, consider it enabled */
	139	remote = of_graph_get_remote_port(ep);
	140	if (remote)
	141	return true;
	142	}
	143
	144	return false;
	145	}
	146
	147	static struct regmap_config meson_regmap_config = {
	148	.reg_bits = 32,
	149	.val_bits = 32,
	150	.reg_stride = 4,
	151	.max_register = 0x1000,
	152	};
	153
8604889f	154	static int meson_drv_bind_master(struct device *dev, bool has_components)
bbbe775e	155	{
a41e82e6	156	struct platform_device *pdev = to_platform_device(dev);
bbbe775e NA	157	struct meson_drm *priv;
	158	struct drm_device *drm;
	159	struct resource *res;
	160	void __iomem *regs;
	161	int ret;
	162
	163	/* Checks if an output connector is available */
	164	if (!meson_vpu_has_available_connectors(dev)) {
	165	dev_err(dev, "No output connector available\n");
	166	return -ENODEV;
	167	}
	168
	169	drm = drm_dev_alloc(&meson_driver, dev);
	170	if (IS_ERR(drm))
	171	return PTR_ERR(drm);
	172
	173	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	174	if (!priv) {
	175	ret = -ENOMEM;
	176	goto free_drm;
	177	}
	178	drm->dev_private = priv;
	179	priv->drm = drm;
	180	priv->dev = dev;
	181
	182	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
	183	regs = devm_ioremap_resource(dev, res);
	184	if (IS_ERR(regs))
	185	return PTR_ERR(regs);
	186
	187	priv->io_base = regs;
	188
	189	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
	190	/* Simply ioremap since it may be a shared register zone */
	191	regs = devm_ioremap(dev, res->start, resource_size(res));
	192	if (!regs)
	193	return -EADDRNOTAVAIL;
	194
	195	priv->hhi = devm_regmap_init_mmio(dev, regs,
	196	&meson_regmap_config);
	197	if (IS_ERR(priv->hhi)) {
	198	dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
	199	return PTR_ERR(priv->hhi);
	200	}
	201
	202	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
	203	/* Simply ioremap since it may be a shared register zone */
	204	regs = devm_ioremap(dev, res->start, resource_size(res));
	205	if (!regs)
	206	return -EADDRNOTAVAIL;
	207
	208	priv->dmc = devm_regmap_init_mmio(dev, regs,
	209	&meson_regmap_config);
	210	if (IS_ERR(priv->dmc)) {
	211	dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
	212	return PTR_ERR(priv->dmc);
	213	}
	214
	215	priv->vsync_irq = platform_get_irq(pdev, 0);
	216
	217	drm_vblank_init(drm, 1);
	218	drm_mode_config_init(drm);
a41e82e6 NA	219	drm->mode_config.max_width = 3840;
	220	drm->mode_config.max_height = 2160;
	221	drm->mode_config.funcs = &meson_mode_config_funcs;
	222
	223	/* Hardware Initialization */
	224
	225	meson_venc_init(priv);
	226	meson_vpp_init(priv);
	227	meson_viu_init(priv);
bbbe775e NA	228
	229	/* Encoder Initialization */
	230
	231	ret = meson_venc_cvbs_create(priv);
	232	if (ret)
	233	goto free_drm;
	234
8604889f NA	235	if (has_components) {
	236	ret = component_bind_all(drm->dev, drm);
	237	if (ret) {
	238	dev_err(drm->dev, "Couldn't bind all components\n");
	239	goto free_drm;
	240	}
a41e82e6	241	}
bbbe775e NA	242
	243	ret = meson_plane_create(priv);
	244	if (ret)
	245	goto free_drm;
	246
	247	ret = meson_crtc_create(priv);
	248	if (ret)
	249	goto free_drm;
	250
	251	ret = drm_irq_install(drm, priv->vsync_irq);
	252	if (ret)
	253	goto free_drm;
	254
	255	drm_mode_config_reset(drm);
bbbe775e NA	256
bbbe775e NA	257	priv->fbdev = drm_fbdev_cma_init(drm, 32,
bbbe775e NA	258	drm->mode_config.num_connector);
	259	if (IS_ERR(priv->fbdev)) {
	260	ret = PTR_ERR(priv->fbdev);
	261	goto free_drm;
	262	}
	263
	264	drm_kms_helper_poll_init(drm);
	265
	266	platform_set_drvdata(pdev, priv);
	267
	268	ret = drm_dev_register(drm, 0);
	269	if (ret)
	270	goto free_drm;
	271
	272	return 0;
	273
	274	free_drm:
	275	drm_dev_unref(drm);
	276
	277	return ret;
	278	}
	279
8604889f NA	280	static int meson_drv_bind(struct device *dev)
	281	{
	282	return meson_drv_bind_master(dev, true);
	283	}
	284
a41e82e6	285	static void meson_drv_unbind(struct device *dev)
bbbe775e	286	{
a41e82e6	287	struct drm_device *drm = dev_get_drvdata(dev);
bbbe775e NA	288	struct meson_drm *priv = drm->dev_private;
	289
	290	drm_dev_unregister(drm);
	291	drm_kms_helper_poll_fini(drm);
	292	drm_fbdev_cma_fini(priv->fbdev);
	293	drm_mode_config_cleanup(drm);
bbbe775e NA	294	drm_dev_unref(drm);
bbbe775e NA	295
bbbe775e NA	296	}
bbbe775e NA	297
a41e82e6 NA	298	static const struct component_master_ops meson_drv_master_ops = {
	299	.bind = meson_drv_bind,
	300	.unbind = meson_drv_unbind,
	301	};
	302
	303	static int compare_of(struct device dev, void data)
	304	{
4bf99144 RH	305	DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
4bf99144 RH	306	dev->of_node, data);
a41e82e6 NA	307
	308	return dev->of_node == data;
	309	}
	310
	311	/* Possible connectors nodes to ignore */
	312	static const struct of_device_id connectors_match[] = {
	313	{ .compatible = "composite-video-connector" },
	314	{ .compatible = "svideo-connector" },
	315	{ .compatible = "hdmi-connector" },
	316	{ .compatible = "dvi-connector" },
	317	{}
	318	};
	319
	320	static int meson_probe_remote(struct platform_device *pdev,
	321	struct component_match **match,
	322	struct device_node *parent,
	323	struct device_node *remote)
	324	{
	325	struct device_node ep, remote_node;
	326	int count = 1;
	327
	328	/* If node is a connector, return and do not add to match table */
	329	if (of_match_node(connectors_match, remote))
	330	return 1;
	331
	332	component_match_add(&pdev->dev, match, compare_of, remote);
	333
	334	for_each_endpoint_of_node(remote, ep) {
	335	remote_node = of_graph_get_remote_port_parent(ep);
	336	if (!remote_node \|\|
	337	remote_node == parent \|\| /* Ignore parent endpoint */
	338	!of_device_is_available(remote_node))
	339	continue;
	340
	341	count += meson_probe_remote(pdev, match, remote, remote_node);
	342
	343	of_node_put(remote_node);
	344	}
	345
	346	return count;
	347	}
	348
	349	static int meson_drv_probe(struct platform_device *pdev)
	350	{
	351	struct component_match *match = NULL;
	352	struct device_node *np = pdev->dev.of_node;
	353	struct device_node ep, remote;
	354	int count = 0;
	355
	356	for_each_endpoint_of_node(np, ep) {
	357	remote = of_graph_get_remote_port_parent(ep);
	358	if (!remote \|\| !of_device_is_available(remote))
	359	continue;
	360
	361	count += meson_probe_remote(pdev, &match, np, remote);
	362	}
	363
8604889f NA	364	if (count && !match)
	365	return meson_drv_bind_master(&pdev->dev, false);
	366
a41e82e6 NA	367	/* If some endpoints were found, initialize the nodes */
	368	if (count) {
	369	dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
	370
	371	return component_master_add_with_match(&pdev->dev,
	372	&meson_drv_master_ops,
	373	match);
	374	}
	375
	376	/* If no output endpoints were available, simply bail out */
	377	return 0;
	378	};
	379
bbbe775e NA	380	static const struct of_device_id dt_match[] = {
	381	{ .compatible = "amlogic,meson-gxbb-vpu" },
	382	{ .compatible = "amlogic,meson-gxl-vpu" },
	383	{ .compatible = "amlogic,meson-gxm-vpu" },
	384	{}
	385	};
	386	MODULE_DEVICE_TABLE(of, dt_match);
	387
	388	static struct platform_driver meson_drm_platform_driver = {
	389	.probe = meson_drv_probe,
bbbe775e	390	.driver = {
8aaacbc0	391	.name = "meson-drm",
bbbe775e NA	392	.of_match_table = dt_match,
	393	},
	394	};
	395
	396	module_platform_driver(meson_drm_platform_driver);
	397
	398	MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
	399	MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
	400	MODULE_DESCRIPTION(DRIVER_DESC);
	401	MODULE_LICENSE("GPL");