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/*
* Tegra Virtualized GPU Platform Interface
*
* Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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/of_platform.h>
#include "gk20a.h"
#include "hal_gk20a.h"
#include "platform_gk20a.h"
static int gk20a_tegra_probe(struct platform_device *dev)
{
struct gk20a_platform *platform = gk20a_get_platform(dev);
struct device_node *np = dev->dev.of_node;
const __be32 *host1x_ptr;
struct platform_device *host1x_pdev = NULL;
host1x_ptr = of_get_property(np, "nvidia,host1x", NULL);
if (host1x_ptr) {
struct device_node *host1x_node =
of_find_node_by_phandle(be32_to_cpup(host1x_ptr));
host1x_pdev = of_find_device_by_node(host1x_node);
if (!host1x_pdev) {
dev_warn(&dev->dev, "host1x device not available");
return -EPROBE_DEFER;
}
} else {
host1x_pdev = to_platform_device(dev->dev.parent);
dev_warn(&dev->dev, "host1x reference not found. assuming host1x to be parent");
}
platform->g->host1x_dev = host1x_pdev;
return 0;
}
struct gk20a_platform vgpu_tegra_platform = {
.has_syncpoints = true,
/* power management configuration */
.can_railgate = false,
.enable_slcg = false,
.enable_blcg = false,
.enable_elcg = false,
.enable_elpg = false,
.enable_aelpg = false,
.probe = gk20a_tegra_probe,
.virtual_dev = true,
};
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