diff --git a/software/videomixer/edid.c b/software/videomixer/edid.c
index 4734189c5..10f9931ee 100644
--- a/software/videomixer/edid.c
+++ b/software/videomixer/edid.c
@@ -232,8 +232,8 @@ void generate_edid(void *out,
 	e->cc_wx_h = 0;
 	e->cc_wy_h = 0;
 
-	e->est_timings_1 = 0;
-	e->est_timings_2 = 0;
+	e->est_timings_1 = timing->established_timing >> 8;
+	e->est_timings_2 = timing->established_timing & 0xff;
 	e->rsv_timings = 0;
 	memset(e->timings_std, 0x01, 16);
 
diff --git a/software/videomixer/edid.h b/software/videomixer/edid.h
index 34b1d6241..975d9c0ad 100644
--- a/software/videomixer/edid.h
+++ b/software/videomixer/edid.h
@@ -15,6 +15,8 @@ struct video_timing {
 	unsigned int v_blanking;
 	unsigned int v_sync_offset;
 	unsigned int v_sync_width;
+
+	unsigned int established_timing;
 };
 
 int validate_edid(const void *buf);
diff --git a/software/videomixer/processor.c b/software/videomixer/processor.c
index bb8c6f4da..faf6b8cc3 100644
--- a/software/videomixer/processor.c
+++ b/software/videomixer/processor.c
@@ -20,7 +20,9 @@ static const struct video_timing video_modes[PROCESSOR_MODE_COUNT] = {
 		.v_active = 768,
 		.v_blanking = 38,
 		.v_sync_offset = 3,
-		.v_sync_width = 6
+		.v_sync_width = 6,
+
+		.established_timing = 0x0008
 	}, {
 		.pixel_clock = 7425,