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/* Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*
*/
#ifndef __KGSL_PWRCTRL_H
#define __KGSL_PWRCTRL_H
/*****************************************************************************
** power flags
*****************************************************************************/
#define KGSL_PWRFLAGS_ON 1
#define KGSL_PWRFLAGS_OFF 0
#define KGSL_PWRLEVEL_TURBO 0
#define KGSL_PWRLEVEL_NOMINAL 1
#define KGSL_PWRLEVEL_LAST_OFFSET 2
#define KGSL_PWR_ON 0xFFFF
#define KGSL_MAX_CLKS 6
/* Only two supported levels, min & max */
#define KGSL_CONSTRAINT_PWR_MAXLEVELS 2
/* Symbolic table for the constraint type */
#define KGSL_CONSTRAINT_TYPES \
{ KGSL_CONSTRAINT_NONE, "None" }, \
{ KGSL_CONSTRAINT_PWRLEVEL, "Pwrlevel" }
/* Symbolic table for the constraint sub type */
#define KGSL_CONSTRAINT_PWRLEVEL_SUBTYPES \
{ KGSL_CONSTRAINT_PWR_MIN, "Min" }, \
{ KGSL_CONSTRAINT_PWR_MAX, "Max" }
struct platform_device;
struct kgsl_clk_stats {
unsigned int old_clock_time[KGSL_MAX_PWRLEVELS];
unsigned int clock_time[KGSL_MAX_PWRLEVELS];
unsigned int on_time_old;
ktime_t start;
ktime_t stop;
unsigned int no_nap_cnt;
unsigned int elapsed;
unsigned int elapsed_old;
};
struct kgsl_pwr_constraint {
unsigned int type;
unsigned int sub_type;
union {
struct {
unsigned int level;
} pwrlevel;
} hint;
unsigned long expires;
uint32_t owner_id;
};
/**
* struct kgsl_pwrctrl - Power control settings for a KGSL device
* @interrupt_num - The interrupt number for the device
* @ebi1_clk - Pointer to the EBI clock structure
* @grp_clks - Array of clocks structures that we control
* @power_flags - Control flags for power
* @pwrlevels - List of supported power levels
* @active_pwrlevel - The currently active power level
* @thermal_pwrlevel - maximum powerlevel constraint from thermal
* @default_pwrlevel - device wake up power level
* @init_pwrlevel - device inital power level
* @max_pwrlevel - maximum allowable powerlevel per the user
* @min_pwrlevel - minimum allowable powerlevel per the user
* @num_pwrlevels - number of available power levels
* @interval_timeout - timeout in jiffies to be idle before a power event
* @strtstp_sleepwake - true if the device supports low latency GPU start/stop
* @gpu_reg - pointer to the regulator structure for gpu_reg
* @gpu_cx - pointer to the regulator structure for gpu_cx
* @pcl - bus scale identifier
* @idle_needed - true if the device needs a idle before clock change
* @irq_name - resource name for the IRQ
* @clk_stats - structure of clock statistics
* @pm_qos_req_dma - the power management quality of service structure
* @pm_qos_latency - allowed CPU latency in microseconds
* @step_mul - multiplier for moving between power levels
* @constraint - currently active power constraint
*/
struct kgsl_pwrctrl {
int interrupt_num;
struct clk *ebi1_clk;
struct clk *grp_clks[KGSL_MAX_CLKS];
unsigned long power_flags;
unsigned long ctrl_flags;
struct kgsl_pwrlevel pwrlevels[KGSL_MAX_PWRLEVELS];
unsigned int active_pwrlevel;
int thermal_pwrlevel;
unsigned int default_pwrlevel;
unsigned int init_pwrlevel;
unsigned int max_pwrlevel;
unsigned int min_pwrlevel;
unsigned int num_pwrlevels;
unsigned int interval_timeout;
bool strtstp_sleepwake;
struct regulator *gpu_reg;
struct regulator *gpu_cx;
uint32_t pcl;
unsigned int idle_needed;
const char *irq_name;
s64 time;
struct kgsl_clk_stats clk_stats;
struct pm_qos_request pm_qos_req_dma;
unsigned int pm_qos_latency;
unsigned int step_mul;
unsigned int irq_last;
struct kgsl_pwr_constraint constraint;
};
void kgsl_pwrctrl_irq(struct kgsl_device *device, int state);
int kgsl_pwrctrl_init(struct kgsl_device *device);
void kgsl_pwrctrl_close(struct kgsl_device *device);
void kgsl_timer(unsigned long data);
void kgsl_idle_check(struct work_struct *work);
void kgsl_pre_hwaccess(struct kgsl_device *device);
int kgsl_pwrctrl_sleep(struct kgsl_device *device);
int kgsl_pwrctrl_wake(struct kgsl_device *device);
void kgsl_pwrctrl_pwrlevel_change(struct kgsl_device *device,
unsigned int level);
int kgsl_pwrctrl_init_sysfs(struct kgsl_device *device);
void kgsl_pwrctrl_uninit_sysfs(struct kgsl_device *device);
void kgsl_pwrctrl_enable(struct kgsl_device *device);
void kgsl_pwrctrl_disable(struct kgsl_device *device);
bool kgsl_pwrctrl_isenabled(struct kgsl_device *device);
static inline unsigned long kgsl_get_clkrate(struct clk *clk)
{
return (clk != NULL) ? clk_get_rate(clk) : 0;
}
void kgsl_pwrctrl_set_state(struct kgsl_device *device, unsigned int state);
void kgsl_pwrctrl_request_state(struct kgsl_device *device, unsigned int state);
int __must_check kgsl_active_count_get(struct kgsl_device *device);
int __must_check kgsl_active_count_get_light(struct kgsl_device *device);
void kgsl_active_count_put(struct kgsl_device *device);
int kgsl_active_count_wait(struct kgsl_device *device, int count);
#endif /* __KGSL_PWRCTRL_H */
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