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video: tegra: automatic powergating for 3d and mpe

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Change-Id: I50784dec578c4c20b790ce25e53e849412c1443a
Signed-off-by: Erik Gilling <konkers@android.com>
This commit is contained in:
Antti Hatala
2010-08-26 04:15:12 -07:00
committed by Colin Cross
parent d6f7c9b3c7
commit c30aa47b8e
2 changed files with 32 additions and 8 deletions
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39
drivers/video/tegra/host/nvhost_acm.c
View File

@@ -25,6 +25,8 @@
#include <linux/sched.h>
#include <linux/err.h>
#include <linux/device.h>
#include <mach/powergate.h>
#include <mach/clk.h>
#define ACM_TIMEOUT 1*HZ
@@ -33,11 +35,17 @@ void nvhost_module_busy(struct nvhost_module *mod)
mutex_lock(&mod->lock);
cancel_delayed_work(&mod->powerdown);
if ((atomic_inc_return(&mod->refcount) == 1) && !mod->powered) {
int i;
if (mod->parent)
nvhost_module_busy(mod->parent);
for (i = 0; i < mod->num_clks; i++)
clk_enable(mod->clk[i]);
if (mod->powergate_id != -1) {
BUG_ON(mod->num_clks != 1);
tegra_powergate_sequence_power_up(
mod->powergate_id, mod->clk[0]);
} else {
int i;
for (i = 0; i < mod->num_clks; i++)
clk_enable(mod->clk[i]);
}
if (mod->func)
mod->func(mod, NVHOST_POWER_ACTION_ON);
mod->powered = true;
@@ -50,13 +58,17 @@ static void powerdown_handler(struct work_struct *work)
struct nvhost_module *mod;
mod = container_of(to_delayed_work(work), struct nvhost_module, powerdown);
mutex_lock(&mod->lock);
BUG_ON(!mod->powered);
if (atomic_read(&mod->refcount) == 0) {
if ((atomic_read(&mod->refcount) == 0) && mod->powered) {
int i;
if (mod->func)
mod->func(mod, NVHOST_POWER_ACTION_OFF);
for (i = 0; i < mod->num_clks; i++)
for (i = 0; i < mod->num_clks; i++) {
clk_disable(mod->clk[i]);
}
if (mod->powergate_id != -1) {
tegra_periph_reset_assert(mod->clk[0]);
tegra_powergate_power_off(mod->powergate_id);
}
mod->powered = false;
if (mod->parent)
nvhost_module_idle(mod->parent);
@@ -89,12 +101,20 @@ static const char *get_module_clk_id(const char *module, int index)
return NULL;
}
static int get_module_powergate_id(const char *module)
{
if (strcmp(module, "gr3d") == 0)
return TEGRA_POWERGATE_3D;
else if (strcmp(module, "mpe") == 0)
return TEGRA_POWERGATE_MPE;
return -1;
}
int nvhost_module_init(struct nvhost_module *mod, const char *name,
nvhost_modulef func, struct nvhost_module *parent,
struct device *dev)
{
int i = 0;
mod->name = name;
while (i < NVHOST_MODULE_MAX_CLOCKS) {
@@ -108,7 +128,9 @@ int nvhost_module_init(struct nvhost_module *mod, const char *name,
__func__, name);
break;
}
clk_set_rate(mod->clk[i], rate);
if (rate != clk_get_rate(mod->clk[i])) {
clk_set_rate(mod->clk[i], rate);
}
i++;
}
@@ -116,6 +138,7 @@ int nvhost_module_init(struct nvhost_module *mod, const char *name,
mod->func = func;
mod->parent = parent;
mod->powered = false;
mod->powergate_id = get_module_powergate_id(name);
mutex_init(&mod->lock);
init_waitqueue_head(&mod->idle);
INIT_DELAYED_WORK(&mod->powerdown, powerdown_handler);

1
drivers/video/tegra/host/nvhost_acm.h
View File

@@ -50,6 +50,7 @@ struct nvhost_module {
atomic_t refcount;
wait_queue_head_t idle;
struct nvhost_module *parent;
int powergate_id;
};
int nvhost_module_init(struct nvhost_module *mod, const char *name,