Add an interface to obtain hwmon energy values. This is used
by selftest to verify power consumption
v2 : use i915_hwmon prefix (Anshuman)
v3 : re-use is_visible function of energy to remove
redundant code (Anshuman)
Signed-off-by: Riana Tauro <riana.tauro@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_hwmon.c | 17 +++++++++++++++++
drivers/gpu/drm/i915/i915_hwmon.h | 1 +
2 files changed, 18 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c
index c588a17f97e9..d45d1cbce886 100644
--- a/drivers/gpu/drm/i915/i915_hwmon.c
+++ b/drivers/gpu/drm/i915/i915_hwmon.c
@@ -442,6 +442,23 @@ hwm_energy_read(struct hwm_drvdata *ddat, u32 attr, long *val)
}
}
+/*
+ * i915_hwmon_get_energy - obtains energy value
+ * Returns: 0 on success or a negative error code
+ */
+int
+i915_hwmon_get_energy(struct drm_i915_private *i915, long *energy)
+{
+ struct i915_hwmon *hwmon = i915->hwmon;
+ struct hwm_drvdata *ddat = &hwmon->ddat;
+
+ if (!hwm_energy_is_visible(ddat, hwmon_energy_input))
+ return -EOPNOTSUPP;
+
+ hwm_energy(ddat, energy);
+ return 0;
+}
+
static umode_t
hwm_curr_is_visible(const struct hwm_drvdata *ddat, u32 attr)
{
diff --git a/drivers/gpu/drm/i915/i915_hwmon.h b/drivers/gpu/drm/i915/i915_hwmon.h
index 7ca9cf2c34c9..a6c8efeb868d 100644
--- a/drivers/gpu/drm/i915/i915_hwmon.h
+++ b/drivers/gpu/drm/i915/i915_hwmon.h
@@ -12,6 +12,7 @@ struct drm_i915_private;
#if IS_REACHABLE(CONFIG_HWMON)
void i915_hwmon_register(struct drm_i915_private *i915);
void i915_hwmon_unregister(struct drm_i915_private *i915);
+int i915_hwmon_get_energy(struct drm_i915_private *i915, long *energy);
#else
static inline void i915_hwmon_register(struct drm_i915_private *i915) { };
static inline void i915_hwmon_unregister(struct drm_i915_private *i915) { };
--
2.25.1
