67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/*
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* Copyright (c) 2014-2015, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* Tegra vpr routines */
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/tegra.h>
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#include <asm/arch/mc.h>
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#include <fdt_support.h>
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static bool _configured;
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void config_gpu(void)
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{
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struct mc_ctlr *mc = (struct mc_ctlr *)NV_PA_MC_BASE;
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/* Turn VPR off */
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writel(0, &mc->mc_video_protect_size_mb);
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writel(TEGRA_MC_VIDEO_PROTECT_REG_WRITE_ACCESS_DISABLED,
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&mc->mc_video_protect_reg_ctrl);
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/* read back to ensure the write went through */
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readl(&mc->mc_video_protect_reg_ctrl);
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debug("configured VPR\n");
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_configured = true;
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}
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bool vpr_configured(void)
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{
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return _configured;
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}
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#if defined(CONFIG_OF_LIBFDT)
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int gpu_enable_node(void *blob, const char *gpupath)
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{
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int offset;
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if (vpr_configured()) {
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offset = fdt_path_offset(blob, gpupath);
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if (offset > 0) {
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fdt_status_okay(blob, offset);
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debug("enabled GPU node %s\n", gpupath);
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}
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}
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return 0;
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}
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#endif
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