1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/evergreen_hdmi.c b/drivers/gpu/drm/radeon/evergreen_hdmi.c
index fe1de855775e..57fcc4b16a52 100644
--- a/drivers/gpu/drm/radeon/evergreen_hdmi.c
+++ b/drivers/gpu/drm/radeon/evergreen_hdmi.c
@@ -291,6 +291,7 @@ void evergreen_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode
         /* fglrx clears sth in AFMT_AUDIO_PACKET_CONTROL2 here */
 
         WREG32(HDMI_ACR_PACKET_CONTROL + offset,
+               HDMI_ACR_SOURCE | /* select SW CTS value */
                HDMI_ACR_AUTO_SEND); /* allow hw to sent ACR packets when required */
 
         evergreen_hdmi_update_ACR(encoder, mode->clock);