> -----Original Message----- > From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf > Of Rex Zhu > Sent: Friday, June 09, 2017 4:20 AM > To: amd-gfx at lists.freedesktop.org > Cc: Zhu, Rex > Subject: [PATCH 2/2] drm/amdgpu: add sysfs for current gpu voltage. Do we want to expose this via sysfs? Why not just include it in the debugfs amdgpu_pm_info file along with all the other power info? This seems inconsistent. Alex > > Change-Id: I348f9307c8e03e193df481e6c9faf234039d97b5 > Signed-off-by: Rex Zhu <Rex.Zhu at amd.com> > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h | 4 +++ > drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 50 > +++++++++++++++++++++++++++++++++ > 2 files changed, 54 insertions(+) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h > b/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h > index f187680..3b77966 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h > @@ -414,6 +414,10 @@ struct amdgpu_dpm_funcs { > ((adev)->powerplay.pp_funcs->switch_power_profile(\ > (adev)->powerplay.pp_handle, type)) > > +#define amdgpu_get_voltage(adev, type, vol) \ > + ((adev)->powerplay.pp_funcs->get_gpu_voltage(\ > + (adev)->powerplay.pp_handle, type, vol)) > + > struct amdgpu_dpm { > struct amdgpu_ps *ps; > /* number of valid power states */ > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c > b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c > index f435275..20dcf06 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c > @@ -958,6 +958,52 @@ static ssize_t > amdgpu_hwmon_get_fan1_input(struct device *dev, > return sprintf(buf, "%i\n", speed); > } > > + > +static ssize_t amdgpu_hwmon_show_vddc(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct amdgpu_device *adev = dev_get_drvdata(dev); > + u32 vol = 0; > + > + if (adev->pp_enabled) > + amdgpu_get_voltage(adev, PP_VDDC, &vol); > + > + return sprintf(buf, "%i\n", vol >> 15); /* voltage in unit of mv */ > + > +} > + > + > +static ssize_t amdgpu_hwmon_set_vddc(struct device *dev, > + struct device_attribute *attr, > + const char *buf, size_t count) > +{ > + /* to do */ > + return count; > +} > + > +static ssize_t amdgpu_hwmon_show_vddci(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct amdgpu_device *adev = dev_get_drvdata(dev); > + u32 vol = 0; > + > + if (adev->pp_enabled) > + amdgpu_get_voltage(adev, PP_VDDCI, &vol); > + > + return sprintf(buf, "%i\n", vol >> 15); /* voltage in unit of mv */ > +} > + > + > +static ssize_t amdgpu_hwmon_set_vddci(struct device *dev, > + struct device_attribute *attr, > + const char *buf, size_t count) > +{ > + /* to do */ > + return count; > +} > + > static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, > amdgpu_hwmon_show_temp, NULL, 0); > static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, > amdgpu_hwmon_show_temp_thresh, NULL, 0); > static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, > amdgpu_hwmon_show_temp_thresh, NULL, 1); > @@ -966,6 +1012,8 @@ static ssize_t > amdgpu_hwmon_get_fan1_input(struct device *dev, > static SENSOR_DEVICE_ATTR(pwm1_min, S_IRUGO, > amdgpu_hwmon_get_pwm1_min, NULL, 0); > static SENSOR_DEVICE_ATTR(pwm1_max, S_IRUGO, > amdgpu_hwmon_get_pwm1_max, NULL, 0); > static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, > amdgpu_hwmon_get_fan1_input, NULL, 0); > +static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO | S_IWUSR, > amdgpu_hwmon_show_vddc, amdgpu_hwmon_set_vddc, 0); > +static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO | S_IWUSR, > amdgpu_hwmon_show_vddci, amdgpu_hwmon_set_vddci, 0); > > static struct attribute *hwmon_attributes[] = { > &sensor_dev_attr_temp1_input.dev_attr.attr, > @@ -976,6 +1024,8 @@ static ssize_t > amdgpu_hwmon_get_fan1_input(struct device *dev, > &sensor_dev_attr_pwm1_min.dev_attr.attr, > &sensor_dev_attr_pwm1_max.dev_attr.attr, > &sensor_dev_attr_fan1_input.dev_attr.attr, > + &sensor_dev_attr_in0_input.dev_attr.attr, > + &sensor_dev_attr_in1_input.dev_attr.attr, > NULL > }; > > -- > 1.9.1 > > _______________________________________________ > amd-gfx mailing list > amd-gfx at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/amd-gfx
