tequilaOS/platform_hardware_libhardware
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

hardware: libhardware: Power HAL add power hints -- DO NOT MERGE

Browse source 
Change-Id: I8ab0376e4f5d8ef09d5b1062cbfbb30c30c5bb96
Signed-off-by: Todd Poynor <toddpoynor@google.com>
This commit is contained in:
Todd Poynor 2012-04-24 13:39:15 -07:00
parent f7781bc9dd
commit 2f143fba74
2 changed files with 41 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

34
include/hardware/power.h
View file

@ -30,6 +30,17 @@ __BEGIN_DECLS
*/
#define POWER_HARDWARE_MODULE_ID "power"
/*
* Power hint identifiers passed to (*powerHint)
*/
typedef enum {
/*
* VSYNC pulse request from SurfaceFlinger started or stopped.
*/
POWER_HINT_VSYNC = 0x00000001,
} power_hint_t;
/**
* Every hardware module must have a data structure named HAL_MODULE_INFO_SYM
* and the fields of this data structure must begin with hw_module_t
@ -40,7 +51,9 @@ typedef struct power_module {
/*
* (*init)() performs power management setup actions at runtime
* startup, such as to set default cpufreq parameters.
* startup, such as to set default cpufreq parameters. This is
* called only by the Power HAL instance loaded by
* PowerManagerService.
*/
void (*init)(struct power_module *module);
@ -71,6 +84,25 @@ typedef struct power_module {
* interactive state prior to turning on the screen.
*/
void (*setInteractive)(struct power_module *module, int on);
/*
* (*powerHint) is called to pass hints on power requirements, which
* may result in adjustment of power/performance parameters of the
* cpufreq governor and other controls. The possible hints are:
*
* POWER_HINT_VSYNC
*
* Foreground app has started or stopped requesting a VSYNC pulse
* from SurfaceFlinger. If the app has started requesting VSYNC
* then CPU and GPU load is expected soon, and it may be appropriate
* to raise speeds of CPU, memory bus, etc. The data parameter is
* non-zero to indicate VSYNC pulse is now requested, or zero for
* VSYNC pulse no longer requested.
*
* A particular platform may choose to ignore any hint.
*/
void (*powerHint)(struct power_module *module, power_hint_t hint,
void *data);
} power_module_t;

8
modules/power/power.c
View file

@ -59,6 +59,13 @@ static void power_set_interactive(struct power_module *module, int on)
}
}
static void power_hint(struct power_module *module, power_hint_t hint,
void *data) {
switch (hint) {
default:
break;
}
}
static struct hw_module_methods_t power_module_methods = {
.open = NULL,
@ -77,4 +84,5 @@ struct power_module HAL_MODULE_INFO_SYM = {
.init = power_init,
.setInteractive = power_set_interactive,
.powerHint = power_hint,
};