diff options
Diffstat (limited to 'drivers/video/tegra/host/nvhost_scale.h')
| -rw-r--r-- | drivers/video/tegra/host/nvhost_scale.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/drivers/video/tegra/host/nvhost_scale.h b/drivers/video/tegra/host/nvhost_scale.h new file mode 100644 index 000000000000..591a5fc04ed9 --- /dev/null +++ b/drivers/video/tegra/host/nvhost_scale.h @@ -0,0 +1,73 @@ +/* + * drivers/video/tegra/host/nvhost_scale.h + * + * Tegra Graphics Host 3D clock scaling + * + * Copyright (c) 2011, NVIDIA Corporation. + * + * 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, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef __NVHOST_SCALE_H +#define __NVHOST_SCALE_H + +#include <mach/clk.h> +#include <linux/hrtimer.h> +#include <linux/spinlock.h> +#include <linux/mutex.h> + +/* + * debugfs parameters to control 3d clock scaling test + * + * period - time period for clock rate evaluation + * fast_response - time period for evaluation of 'busy' spikes + * idle_min - if less than [idle_min] percent idle over [fast_response] + * microseconds, clock up. + * idle_max - if over [idle_max] percent idle over [period] microseconds, + * clock down. + * max_scale - limits rate changes to no less than (100 - max_scale)% or + * (100 + 2 * max_scale)% of current clock rate + * verbosity - set above 5 for debug printouts + */ + +struct scale3d_info_rec { + spinlock_t lock; /* lock for timestamps etc */ + struct mutex set_lock; /* lock for clock setting */ + int enable; + int init; + ktime_t idle_frame; + ktime_t fast_frame; + ktime_t last_idle; + ktime_t last_busy; + int is_idle; + unsigned long idle_total; + struct work_struct work; + unsigned int scale; + unsigned int p_period; + unsigned int p_idle_min; + unsigned int p_idle_max; + unsigned int p_fast_response; + unsigned int p_verbosity; + struct clk *clk_3d; + struct clk *clk_3d2; +}; + +/* reset 3d module load counters, called on resume */ +void scale3d_reset(void); + +int scale3d_is_enabled(void); +void scale3d_enable(int enable); + +#endif /* __NVHOST_SCALE_H */ |