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/*
* Copyright (c) 2014-2015, 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* Tegra vpr routines */
#include <common.h>
#include <asm/io.h>
#include <asm/arch/tegra.h>
#include <asm/arch/mc.h>
#include <fdt_support.h>
static bool _configured;
void config_gpu(void)
{
struct mc_ctlr *mc = (struct mc_ctlr *)NV_PA_MC_BASE;
/* Turn VPR off */
writel(0, &mc->mc_video_protect_size_mb);
writel(TEGRA_MC_VIDEO_PROTECT_REG_WRITE_ACCESS_DISABLED,
&mc->mc_video_protect_reg_ctrl);
/* read back to ensure the write went through */
readl(&mc->mc_video_protect_reg_ctrl);
debug("configured VPR\n");
_configured = true;
}
#if defined(CONFIG_OF_LIBFDT)
int gpu_enable_node(void *blob, const char *gpupath)
{
int offset;
if (_configured) {
offset = fdt_path_offset(blob, gpupath);
if (offset > 0) {
fdt_status_okay(blob, offset);
debug("enabled GPU node %s\n", gpupath);
}
}
return 0;
}
#endif
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