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media: TDA1997x: report -ENOLINK after disconnecting HDMI source

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The TD1997x chip retains vper, hper and hsper register values when the
HDMI source is disconnected. Use a different means of checking if the
link is still valid.

Signed-off-by: Krzysztof Hałasa <khalasa@piap.pl>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Krzysztof Hałasa 2021-07-26 12:49:30 +02:00 committed by Mauro Carvalho Chehab
parent 7dee103087
commit 5cdd19bbad
1 changed files with 2 additions and 1 deletions
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3
drivers/media/i2c/tda1997x.c
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@ -1107,7 +1107,8 @@ tda1997x_detect_std(struct tda1997x_state *state,
hper = io_read16(sd, REG_H_PER) & MASK_HPER;
hsper = io_read16(sd, REG_HS_WIDTH) & MASK_HSWIDTH;
v4l2_dbg(1, debug, sd, "Signal Timings: %u/%u/%u\n", vper, hper, hsper);
if (!vper || !hper || !hsper)
if (!state->input_detect[0] && !state->input_detect[1])
return -ENOLINK;
for (i = 0; v4l2_dv_timings_presets[i].bt.width; i++) {