drivers/gpu/drm/meson/meson_drv.c - linux-imx - Git at Google

 /*
  * 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_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_fb_cma_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)) {
 		ret = PTR_ERR(regs);
 		goto free_drm;
 	}

 	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) {
 		ret = -EADDRNOTAVAIL;
 		goto free_drm;
 	}

 	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");
 		ret = PTR_ERR(priv->hhi);
 		goto free_drm;
 	}

 	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) {
 		ret = -EADDRNOTAVAIL;
 		goto free_drm;
 	}

 	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");
 		ret = PTR_ERR(priv->dmc);
 		goto free_drm;
 	}

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

 	ret = drm_vblank_init(drm, 1);
 	if (ret)
 		goto free_drm;

 	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");
	/*
	* 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_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_fb_cma_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)) {
	ret = PTR_ERR(regs);
	goto free_drm;
	}

	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) {
	ret = -EADDRNOTAVAIL;
	goto free_drm;
	}

	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");
	ret = PTR_ERR(priv->hhi);
	goto free_drm;
	}

	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) {
	ret = -EADDRNOTAVAIL;
	goto free_drm;
	}

	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");
	ret = PTR_ERR(priv->dmc);
	goto free_drm;
	}

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

	ret = drm_vblank_init(drm, 1);
	if (ret)
	goto free_drm;

	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");