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drm/radeon: Expose vddc through hwmon

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Create hwmon attribute for vddc, that uses previously declared get_current_vddc() callback if there's an implementation available.

Also hides vddc, if there is no implementation for the current chipset (as per Alexander Deucher's suggestion).

Signed-off-by: Sandeep Raghuraman <sandy.8925@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Sandeep Raghuraman 2020-10-09 13:19:19 +05:30 committed by Alex Deucher
parent c57a8308e2
commit fddc611ca3
1 changed files with 28 additions and 1 deletions
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29
drivers/gpu/drm/radeon/radeon_pm.c
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@ -737,6 +737,26 @@ static ssize_t radeon_hwmon_show_sclk(struct device *dev,
static SENSOR_DEVICE_ATTR(freq1_input, S_IRUGO, radeon_hwmon_show_sclk, NULL,
0);
static ssize_t radeon_hwmon_show_vddc(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct radeon_device *rdev = dev_get_drvdata(dev);
struct drm_device *ddev = rdev->ddev;
u16 vddc = 0;
/* Can't get vddc 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_vddc)
vddc = rdev->asic->dpm.get_current_vddc(rdev);
return snprintf(buf, PAGE_SIZE, "%u\n", vddc);
}
static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, radeon_hwmon_show_vddc, NULL,
0);
static struct attribute *hwmon_attributes[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
@ -747,6 +767,7 @@ static struct attribute *hwmon_attributes[] = {
&sensor_dev_attr_pwm1_min.dev_attr.attr,
&sensor_dev_attr_pwm1_max.dev_attr.attr,
&sensor_dev_attr_freq1_input.dev_attr.attr,
&sensor_dev_attr_in0_input.dev_attr.attr,
NULL
};
@ -765,7 +786,13 @@ static umode_t hwmon_attributes_visible(struct kobject *kobj,
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_freq1_input.dev_attr.attr))
attr == &sensor_dev_attr_freq1_input.dev_attr.attr ||
attr == &sensor_dev_attr_in0_input.dev_attr.attr))
return 0;
/* Skip vddc attribute if get_current_vddc is not implemented */
if(attr == &sensor_dev_attr_in0_input.dev_attr.attr &&
!rdev->asic->dpm.get_current_vddc)
return 0;
/* Skip fan attributes if fan is not present */