[media] ad9389b: no monitor if EDID is wrong

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@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Mats Randgaard 2013-08-14 09:23:48 -03:00 committed by Mauro Carvalho Chehab
parent 70028fe646
commit 7be4f88811
1 changed files with 3 additions and 0 deletions

View File

@ -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;