1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 55b8beb0a152..dba5147f4064 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1617,6 +1617,10 @@ static enum drm_connector_status intel_sdvo_detect(struct drm_connector *connect
 
         intel_sdvo_write_cmd(intel_output,
                              SDVO_CMD_GET_ATTACHED_DISPLAYS, NULL, 0);
+        if (sdvo_priv->is_tv) {
+                /* add 30ms delay when the output type is SDVO-TV */
+                mdelay(30);
+        }
         status = intel_sdvo_read_response(intel_output, &response, 2);
 
         DRM_DEBUG_KMS("SDVO response %d %d\n", response & 0xff, response >> 8);