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[media] ad9389b: trigger edid re-read by power-cycle chip 

Signed-off-by: Martin Bugge <marbugge@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:
Martin Bugge 2013-08-14 09:24:33 -03:00 committed by Mauro Carvalho Chehab
parent 7be4f88811
commit 15edc1ccdb
1 changed files with 4 additions and 3 deletions
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7
drivers/media/i2c/ad9389b.c
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@ -855,8 +855,10 @@ static void ad9389b_edid_handler(struct work_struct *work)
* (DVI connectors are particularly prone to this problem). */ * (DVI connectors are particularly prone to this problem). */
if (state->edid.read_retries) { if (state->edid.read_retries) {
state->edid.read_retries--; state->edid.read_retries--;
/* EDID read failed, trigger a retry */ v4l2_dbg(1, debug, sd, "%s: edid read failed\n", __func__);
ad9389b_wr(sd, 0xc9, 0xf); state->have_monitor = false;
ad9389b_s_power(sd, false);
ad9389b_s_power(sd, true);
queue_delayed_work(state->work_queue, queue_delayed_work(state->work_queue,
&state->edid_handler, EDID_DELAY); &state->edid_handler, EDID_DELAY);
return; return;
@ -1019,7 +1021,6 @@ static bool ad9389b_check_edid_status(struct v4l2_subdev *sd)
segment = ad9389b_rd(sd, 0xc4); segment = ad9389b_rd(sd, 0xc4);
if (segment >= EDID_MAX_SEGM) { if (segment >= EDID_MAX_SEGM) {
v4l2_err(sd, "edid segment number too big\n"); v4l2_err(sd, "edid segment number too big\n");
state->have_monitor = false;
return false; return false;
} }
v4l2_dbg(1, debug, sd, "%s: got segment %d\n", __func__, segment); v4l2_dbg(1, debug, sd, "%s: got segment %d\n", __func__, segment);