static void radeon_legacy_encoder_disable(struct drm_encoder *encoder)
{
struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
- struct drm_encoder_helper_funcs *encoder_funcs;
+ const struct drm_encoder_helper_funcs *encoder_funcs;
encoder_funcs = encoder->helper_private;
encoder_funcs->dpms(encoder, DRM_MODE_DPMS_OFF);