diff options
Diffstat (limited to 'arch/arm/mach-tegra/gpu.c')
| -rw-r--r-- | arch/arm/mach-tegra/gpu.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/gpu.c b/arch/arm/mach-tegra/gpu.c new file mode 100644 index 0000000000..4ea046d3e5 --- /dev/null +++ b/arch/arm/mach-tegra/gpu.c @@ -0,0 +1,66 @@ +/* + * 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; +} + +bool vpr_configured(void) +{ + return _configured; +} + +#if defined(CONFIG_OF_LIBFDT) + +int gpu_enable_node(void *blob, const char *gpupath) +{ + int offset; + + if (vpr_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 |