Commit 052813d9 authored by Sandeep Raghuraman's avatar Sandeep Raghuraman Committed by Alex Deucher
Browse files

drm/radeon: Add sclk frequency as hwmon sensor 



This patch adds support for reporting sclk values for Radeon GPUs, where supported.

Signed-off-by: default avatarSandeep Raghuraman <sandy.8925@gmail.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 05f59762

drivers/gpu/drm/radeon/radeon_pm.c

+28 −1
Original line number Diff line number Diff line
@@ -712,6 +712,31 @@ static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, radeon_hwmon_get_pwm1_ 
static SENSOR_DEVICE_ATTR(pwm1_min, S_IRUGO, radeon_hwmon_get_pwm1_min, NULL, 0);

static SENSOR_DEVICE_ATTR(pwm1_max, S_IRUGO, radeon_hwmon_get_pwm1_max, NULL, 0);



static ssize_t radeon_hwmon_show_sclk(struct device *dev,

				      struct device_attribute *attr, char *buf)

{

	struct radeon_device *rdev = dev_get_drvdata(dev);

	struct drm_device *ddev = rdev->ddev;

	u32 sclk = 0;



	/* Can't get clock frequency when the card is off */

	if ((rdev->flags & RADEON_IS_PX) &&

	    (ddev->switch_power_state != DRM_SWITCH_POWER_ON))

		return -EINVAL;



	if (rdev->asic->dpm.get_current_sclk)

		sclk = radeon_dpm_get_current_sclk(rdev);



	/* Value returned by dpm is in 10 KHz units, need to convert it into Hz 

	   for hwmon */

	sclk *= 10000;



	return snprintf(buf, PAGE_SIZE, "%u\n", sclk);

}



static SENSOR_DEVICE_ATTR(freq1_input, S_IRUGO, radeon_hwmon_show_sclk, NULL,

			  0);





static struct attribute *hwmon_attributes[] = {

	&sensor_dev_attr_temp1_input.dev_attr.attr,
@@ -721,6 +746,7 @@ static struct attribute *hwmon_attributes[] = { 
	&sensor_dev_attr_pwm1_enable.dev_attr.attr,

	&sensor_dev_attr_pwm1_min.dev_attr.attr,

	&sensor_dev_attr_pwm1_max.dev_attr.attr,

	&sensor_dev_attr_freq1_input.dev_attr.attr,

	NULL

};
@@ -738,7 +764,8 @@ static umode_t hwmon_attributes_visible(struct kobject *kobj, 
	     attr == &sensor_dev_attr_pwm1.dev_attr.attr ||

	     attr == &sensor_dev_attr_pwm1_enable.dev_attr.attr ||

	     attr == &sensor_dev_attr_pwm1_max.dev_attr.attr ||

	     attr == &sensor_dev_attr_pwm1_min.dev_attr.attr))

	     attr == &sensor_dev_attr_pwm1_min.dev_attr.attr ||

	     attr == &sensor_dev_attr_freq1_input.dev_attr.attr))

		return 0;



	/* Skip fan attributes if fan is not present */