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drm/i915: Add new helper to return current attached encoder for connector

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For introducing splitted encoder/connector structure, this helper will return
connector's attached encoder when needed.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zhenyu Wang 2010-03-30 14:39:29 +08:00 committed by Eric Anholt
parent 5daa55eba7
commit f1c79df3aa
2 changed files with 26 additions and 0 deletions
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25
drivers/gpu/drm/i915/intel_display.c
View File

@ -4982,6 +4982,31 @@ struct drm_encoder *intel_best_encoder(struct drm_connector *connector)
return &intel_encoder->enc;
}
/*
* Return which encoder is currently attached for connector.
*/
struct drm_encoder *intel_attached_encoder (struct drm_connector *connector)
{
struct drm_mode_object *obj;
struct drm_encoder *encoder;
int i;
for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
if (connector->encoder_ids[i] == 0)
break;
obj = drm_mode_object_find(connector->dev,
connector->encoder_ids[i],
DRM_MODE_OBJECT_ENCODER);
if (!obj)
continue;
encoder = obj_to_encoder(obj);
return encoder;
}
return NULL;
}
/*
* set vga decode state - true == enable VGA decode
*/

1
drivers/gpu/drm/i915/intel_drv.h
View File

@ -190,6 +190,7 @@ extern void intel_encoder_prepare (struct drm_encoder *encoder);
extern void intel_encoder_commit (struct drm_encoder *encoder);
extern struct drm_encoder *intel_best_encoder(struct drm_connector *connector);
extern struct drm_encoder *intel_attached_encoder(struct drm_connector *connector);
extern struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
struct drm_crtc *crtc);