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// SPDX-License-Identifier: MIT
/*
* Copyright © 2022 Intel Corporation
*/
#include "i915_drv.h"
#include "intel_display_power_well.h"
struct i915_power_well *
lookup_power_well(struct drm_i915_private *i915,
enum i915_power_well_id power_well_id)
{
struct i915_power_well *power_well;
for_each_power_well(i915, power_well)
if (power_well->desc->id == power_well_id)
return power_well;
/*
* It's not feasible to add error checking code to the callers since
* this condition really shouldn't happen and it doesn't even make sense
* to abort things like display initialization sequences. Just return
* the first power well and hope the WARN gets reported so we can fix
* our driver.
*/
drm_WARN(&i915->drm, 1,
"Power well %d not defined for this platform\n",
power_well_id);
return &i915->power_domains.power_wells[0];
}
void intel_power_well_enable(struct drm_i915_private *i915,
struct i915_power_well *power_well)
{
drm_dbg_kms(&i915->drm, "enabling %s\n", power_well->desc->name);
power_well->desc->ops->enable(i915, power_well);
power_well->hw_enabled = true;
}
void intel_power_well_disable(struct drm_i915_private *i915,
struct i915_power_well *power_well)
{
drm_dbg_kms(&i915->drm, "disabling %s\n", power_well->desc->name);
power_well->hw_enabled = false;
power_well->desc->ops->disable(i915, power_well);
}
void intel_power_well_sync_hw(struct drm_i915_private *i915,
struct i915_power_well *power_well)
{
power_well->desc->ops->sync_hw(i915, power_well);
power_well->hw_enabled =
power_well->desc->ops->is_enabled(i915, power_well);
}
void intel_power_well_get(struct drm_i915_private *i915,
struct i915_power_well *power_well)
{
if (!power_well->count++)
intel_power_well_enable(i915, power_well);
}
void intel_power_well_put(struct drm_i915_private *i915,
struct i915_power_well *power_well)
{
drm_WARN(&i915->drm, !power_well->count,
"Use count on power well %s is already zero",
power_well->desc->name);
if (!--power_well->count)
intel_power_well_disable(i915, power_well);
}
bool intel_power_well_is_enabled(struct drm_i915_private *i915,
struct i915_power_well *power_well)
{
return power_well->desc->ops->is_enabled(i915, power_well);
}
bool intel_power_well_is_enabled_cached(struct i915_power_well *power_well)
{
return power_well->hw_enabled;
}
bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
enum i915_power_well_id power_well_id)
{
struct i915_power_well *power_well;
power_well = lookup_power_well(dev_priv, power_well_id);
return intel_power_well_is_enabled(dev_priv, power_well);
}
bool intel_power_well_is_always_on(struct i915_power_well *power_well)
{
return power_well->desc->always_on;
}
const char *intel_power_well_name(struct i915_power_well *power_well)
{
return power_well->desc->name;
}
u64 intel_power_well_domains(struct i915_power_well *power_well)
{
return power_well->desc->domains;
}
int intel_power_well_refcount(struct i915_power_well *power_well)
{
return power_well->count;
}
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