---

yaml
---
r: 336057
b: refs/heads/master
c: cf9afb1
h: refs/heads/master
i:
  336055: e044e78
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ccbd5bc448ec782af7d1f3f68bd450c9c38015a0
+refs/heads/master: cf9afb1dafaf1ffeffbb4acdb5adf255e8a2aa76

trunk/drivers/media/i2c/adv7604.c

@@ -76,6 +76,7 @@ struct adv7604_state {
 	struct workqueue_struct *work_queues;
 	struct delayed_work delayed_work_enable_hotplug;
 	bool connector_hdmi;
+	bool restart_stdi_once;
 
 	/* i2c clients */
 	struct i2c_client *i2c_avlink;
@@ -1297,9 +1298,31 @@ static int adv7604_query_dv_timings(struct v4l2_subdev *sd,
 		stdi.lcvs -= 2;
 		v4l2_dbg(1, debug, sd, "%s: lcvs - 1 = %d\n", __func__, stdi.lcvs);
 		if (stdi2dv_timings(sd, &stdi, timings)) {
+			/*
+			 * The STDI block may measure wrong values, especially
+			 * for lcvs and lcf. If the driver can not find any
+			 * valid timing, the STDI block is restarted to measure
+			 * the video timings again. The function will return an
+			 * error, but the restart of STDI will generate a new
+			 * STDI interrupt and the format detection process will
+			 * restart.
+			 */
+			if (state->restart_stdi_once) {
+				v4l2_dbg(1, debug, sd, "%s: restart STDI\n", __func__);
+				/* TODO restart STDI for Sync Channel 2 */
+				/* enter one-shot mode */
+				cp_write_and_or(sd, 0x86, 0xf9, 0x00);
+				/* trigger STDI restart */
+				cp_write_and_or(sd, 0x86, 0xf9, 0x04);
+				/* reset to continuous mode */
+				cp_write_and_or(sd, 0x86, 0xf9, 0x02);
+				state->restart_stdi_once = false;
+				return -ENOLINK;
+			}
 			v4l2_dbg(1, debug, sd, "%s: format not supported\n", __func__);
 			return -ERANGE;
 		}
+		state->restart_stdi_once = true;
 	}
 found:
 
@@ -2026,6 +2049,7 @@ static int adv7604_probe(struct i2c_client *client,
 		v4l2_err(sd, "failed to create all i2c clients\n");
 		goto err_i2c;
 	}
+	state->restart_stdi_once = true;
 
 	/* work queues */
 	state->work_queues = create_singlethread_workqueue(client->name);