From: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
---
v2:
[Jacopo]
- Write register 0x63 and 0x64 directly as going through the function
breaks RDACM21 operations
---
drivers/media/i2c/max9286.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/media/i2c/max9286.c b/drivers/media/i2c/max9286.c
index 3ef74ba10074..e0c637d4a7de 100644
--- a/drivers/media/i2c/max9286.c
+++ b/drivers/media/i2c/max9286.c
@@ -966,6 +966,18 @@ static int max9286_setup(struct max9286_priv *priv)
max9286_write(priv, 0x0c, MAX9286_HVEN | MAX9286_INVVS |
MAX9286_HVSRC_D14);
+ /*
+ * The overlap window seems to provide additional validation by tracking
+ * the delay between vsync and frame sync, generating an error if the
+ * delay is bigger than the programmed window, though it's not yet clear
+ * what value should be set.
+ *
+ * As it's an optional value and can be disabled, we do so by setting
+ * a 0 overlap value.
+ */
+ max9286_write(priv, 0x63, 0);
+ max9286_write(priv, 0x64, 0);
+
/*
* Wait for 2ms to allow the link to resynchronize after the
* configuration change.
--
2.26.0
