From: Mats Randgaard <matrandg@xxxxxxxxx>
state->have_monitor is set to false if the EDID that is read from
the monitor has too many segments or wrong CRC.
Signed-off-by: Mats Randgaard <matrandg@xxxxxxxxx>
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/i2c/ad9389b.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/media/i2c/ad9389b.c b/drivers/media/i2c/ad9389b.c
index 7e68d8f..52384e8 100644
--- a/drivers/media/i2c/ad9389b.c
+++ b/drivers/media/i2c/ad9389b.c
@@ -1019,6 +1019,7 @@ static bool ad9389b_check_edid_status(struct v4l2_subdev *sd)
segment = ad9389b_rd(sd, 0xc4);
if (segment >= EDID_MAX_SEGM) {
v4l2_err(sd, "edid segment number too big\n");
+ state->have_monitor = false;
return false;
}
v4l2_dbg(1, debug, sd, "%s: got segment %d\n", __func__, segment);
@@ -1032,6 +1033,8 @@ static bool ad9389b_check_edid_status(struct v4l2_subdev *sd)
}
if (!edid_segment_verify_crc(sd, segment)) {
/* edid crc error, force reread of edid segment */
+ v4l2_err(sd, "%s: edid crc error\n", __func__);
+ state->have_monitor = false;
ad9389b_s_power(sd, false);
ad9389b_s_power(sd, true);
return false;
--
1.8.3.2
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