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gpu:nvgpu:sysfs node to enable/disable aelpg

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Added "aelpg_enable" sysfs node to enable/disable aelpg.

Bug 1464737

Change-Id: Ia0eadbea59e2f9373ab5f413fa6e28780aff3c3c
Signed-off-by: Mahantesh Kumbar <mkumbar@nvidia.com>
This commit is contained in:
Mahantesh Kumbar
2014-07-09 14:21:50 +05:30
committed by Dan Willemsen
parent b0759dc68d
commit f5422f80f2
1 changed files with 51 additions and 0 deletions
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51
drivers/gpu/nvgpu/gk20a/gk20a_sysfs.c
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@@ -389,6 +389,55 @@ static ssize_t aelpg_param_read(struct device *device,
static DEVICE_ATTR(aelpg_param, S_IRWXUGO,
aelpg_param_read, aelpg_param_store);
static ssize_t aelpg_enable_store(struct device *device,
struct device_attribute *attr, const char *buf, size_t count)
{
struct platform_device *ndev = to_platform_device(device);
struct gk20a *g = get_gk20a(ndev);
unsigned long val = 0;
int status = 0;
union pmu_ap_cmd ap_cmd;
int err;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
err = gk20a_busy(g->dev);
if (g->pmu.pmu_ready) {
if (val && !g->aelpg_enabled) {
g->aelpg_enabled = true;
/* Enable AELPG */
ap_cmd.init.cmd_id = PMU_AP_CMD_ID_ENABLE_CTRL;
status = gk20a_pmu_ap_send_command(g, &ap_cmd, false);
} else if (!val && g->aelpg_enabled) {
g->aelpg_enabled = false;
/* Disable AELPG */
ap_cmd.init.cmd_id = PMU_AP_CMD_ID_DISABLE_CTRL;
status = gk20a_pmu_ap_send_command(g, &ap_cmd, false);
}
} else {
dev_info(device, "PMU is not ready, AELPG request failed\n");
}
gk20a_idle(g->dev);
dev_info(device, "AELPG is %s.\n", g->aelpg_enabled ? "enabled" :
"disabled");
return count;
}
static ssize_t aelpg_enable_read(struct device *device,
struct device_attribute *attr, char *buf)
{
struct platform_device *ndev = to_platform_device(device);
struct gk20a *g = get_gk20a(ndev);
return sprintf(buf, "%d\n", g->aelpg_enabled ? 1 : 0);
}
static DEVICE_ATTR(aelpg_enable, ROOTRW,
aelpg_enable_read, aelpg_enable_store);
#ifdef CONFIG_PM_RUNTIME
static ssize_t force_idle_store(struct device *device,
struct device_attribute *attr, const char *buf, size_t count)
@@ -458,6 +507,7 @@ void gk20a_remove_sysfs(struct device *dev)
device_remove_file(dev, &dev_attr_force_idle);
#endif
device_remove_file(dev, &dev_attr_aelpg_param);
device_remove_file(dev, &dev_attr_aelpg_enable);
if (g->host1x_dev && (dev->parent != &g->host1x_dev->dev))
sysfs_remove_link(&dev->kobj, dev_name(dev));
@@ -482,6 +532,7 @@ void gk20a_create_sysfs(struct platform_device *dev)
error |= device_create_file(&dev->dev, &dev_attr_force_idle);
#endif
error |= device_create_file(&dev->dev, &dev_attr_aelpg_param);
error |= device_create_file(&dev->dev, &dev_attr_aelpg_enable);
if (g->host1x_dev && (dev->dev.parent != &g->host1x_dev->dev))
error |= sysfs_create_link(&g->host1x_dev->dev.kobj,