drm/object: Add drm_object_property_get_default_value() function
Some functions to create properties (drm_plane_create_zpos_property or drm_plane_create_color_properties for example) will ask for a range of acceptable value and an initial one. This initial value is then stored in the values array for that property. Let's provide an helper to access this property. Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Link: https://patchwork.freedesktop.org/patch/msgid/20220221095918.18763-7-maxime@cerno.tech
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@ -297,12 +297,27 @@ int drm_object_property_set_value(struct drm_mode_object *obj,
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}
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}
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EXPORT_SYMBOL(drm_object_property_set_value);
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EXPORT_SYMBOL(drm_object_property_set_value);
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static int __drm_object_property_get_value(struct drm_mode_object *obj,
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static int __drm_object_property_get_prop_value(struct drm_mode_object *obj,
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struct drm_property *property,
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struct drm_property *property,
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uint64_t *val)
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uint64_t *val)
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{
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{
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int i;
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int i;
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for (i = 0; i < obj->properties->count; i++) {
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if (obj->properties->properties[i] == property) {
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*val = obj->properties->values[i];
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return 0;
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}
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}
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return -EINVAL;
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}
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static int __drm_object_property_get_value(struct drm_mode_object *obj,
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struct drm_property *property,
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uint64_t *val)
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{
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/* read-only properties bypass atomic mechanism and still store
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/* read-only properties bypass atomic mechanism and still store
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* their value in obj->properties->values[].. mostly to avoid
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* their value in obj->properties->values[].. mostly to avoid
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* having to deal w/ EDID and similar props in atomic paths:
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* having to deal w/ EDID and similar props in atomic paths:
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@ -311,15 +326,7 @@ static int __drm_object_property_get_value(struct drm_mode_object *obj,
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!(property->flags & DRM_MODE_PROP_IMMUTABLE))
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!(property->flags & DRM_MODE_PROP_IMMUTABLE))
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return drm_atomic_get_property(obj, property, val);
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return drm_atomic_get_property(obj, property, val);
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for (i = 0; i < obj->properties->count; i++) {
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return __drm_object_property_get_prop_value(obj, property, val);
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if (obj->properties->properties[i] == property) {
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*val = obj->properties->values[i];
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return 0;
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}
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}
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return -EINVAL;
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}
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}
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/**
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/**
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@ -348,6 +355,32 @@ int drm_object_property_get_value(struct drm_mode_object *obj,
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}
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}
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EXPORT_SYMBOL(drm_object_property_get_value);
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EXPORT_SYMBOL(drm_object_property_get_value);
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/**
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* drm_object_property_get_default_value - retrieve the default value of a
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* property when in atomic mode.
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* @obj: drm mode object to get property value from
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* @property: property to retrieve
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* @val: storage for the property value
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*
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* This function retrieves the default state of the given property as passed in
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* to drm_object_attach_property
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*
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* Only atomic drivers should call this function directly, as for non-atomic
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* drivers it will return the current value.
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*
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* Returns:
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* Zero on success, error code on failure.
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*/
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int drm_object_property_get_default_value(struct drm_mode_object *obj,
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struct drm_property *property,
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uint64_t *val)
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{
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WARN_ON(!drm_drv_uses_atomic_modeset(property->dev));
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return __drm_object_property_get_prop_value(obj, property, val);
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}
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EXPORT_SYMBOL(drm_object_property_get_default_value);
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/* helper for getconnector and getproperties ioctls */
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/* helper for getconnector and getproperties ioctls */
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int drm_mode_object_get_properties(struct drm_mode_object *obj, bool atomic,
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int drm_mode_object_get_properties(struct drm_mode_object *obj, bool atomic,
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uint32_t __user *prop_ptr,
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uint32_t __user *prop_ptr,
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@ -98,6 +98,10 @@ struct drm_object_properties {
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* Hence atomic drivers should not use drm_object_property_set_value()
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* Hence atomic drivers should not use drm_object_property_set_value()
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* and drm_object_property_get_value() on mutable objects, i.e. those
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* and drm_object_property_get_value() on mutable objects, i.e. those
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* without the DRM_MODE_PROP_IMMUTABLE flag set.
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* without the DRM_MODE_PROP_IMMUTABLE flag set.
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*
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* For atomic drivers the default value of properties is stored in this
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* array, so drm_object_property_get_default_value can be used to
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* retrieve it.
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*/
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*/
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uint64_t values[DRM_OBJECT_MAX_PROPERTY];
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uint64_t values[DRM_OBJECT_MAX_PROPERTY];
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};
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};
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@ -126,6 +130,9 @@ int drm_object_property_set_value(struct drm_mode_object *obj,
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int drm_object_property_get_value(struct drm_mode_object *obj,
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int drm_object_property_get_value(struct drm_mode_object *obj,
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struct drm_property *property,
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struct drm_property *property,
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uint64_t *value);
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uint64_t *value);
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int drm_object_property_get_default_value(struct drm_mode_object *obj,
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struct drm_property *property,
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uint64_t *val);
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void drm_object_attach_property(struct drm_mode_object *obj,
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void drm_object_attach_property(struct drm_mode_object *obj,
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struct drm_property *property,
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struct drm_property *property,
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