@@ -1121,6 +1121,29 @@ out_unlock:
EXPORT_SYMBOL(drm_encoder_init);
/**
+ * drm_encoder_index - find the index of a registered encoder
+ * @encoder: encoder to find index for
+ *
+ * Given a registered encoder, return the index of that encoder within a DRM
+ * device's list of encoders.
+ */
+unsigned int drm_encoder_index(struct drm_encoder *encoder)
+{
+ unsigned int index = 0;
+ struct drm_encoder *tmp;
+
+ drm_for_each_encoder(tmp, encoder->dev) {
+ if (tmp == encoder)
+ return index;
+
+ index++;
+ }
+
+ BUG();
+}
+EXPORT_SYMBOL(drm_encoder_index);
+
+/**
* drm_encoder_cleanup - cleans up an initialised encoder
* @encoder: encoder to cleanup
*
@@ -1241,6 +1241,7 @@ extern int drm_encoder_init(struct drm_device *dev,
struct drm_encoder *encoder,
const struct drm_encoder_funcs *funcs,
int encoder_type);
+extern unsigned int drm_encoder_index(struct drm_encoder *encoder);
/**
* drm_encoder_crtc_ok - can a given crtc drive a given encoder?
This is useful for adding encoder_mask in crtc_state. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> --- drivers/gpu/drm/drm_crtc.c | 23 +++++++++++++++++++++++ include/drm/drm_crtc.h | 1 + 2 files changed, 24 insertions(+)