On Sun, Aug 30, 2020 at 3:25 AM Sandeep Raghuraman <sandy.8...@gmail.com> wrote:
>
> This patch series adds support for reporting sclk and vddc values for Radeon
> GPUs, where supported.
This commit message should be specific to this particular patch rather
than the series. You could probably expose mclk as well.
Alex
>
> Signed-off-by: Sandeep Raghuraman <sandy.8...@gmail.com>
> ---
> drivers/gpu/drm/radeon/radeon_pm.c | 29 ++++++++++++++++++++++++++++-
> 1 file changed, 28 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_pm.c
> b/drivers/gpu/drm/radeon/radeon_pm.c
> index 8c5d6fda0d75..05c4196a8212 100644
> --- a/drivers/gpu/drm/radeon/radeon_pm.c
> +++ b/drivers/gpu/drm/radeon/radeon_pm.c
> @@ -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 */
> --
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