From: Krzysztof Hałasa <khalasa@piap.pl>
Date: Mon, 26 Jul 2021 10:49:30 +0000 (+0200)
Subject: media: TDA1997x: report -ENOLINK after disconnecting HDMI source
X-Git-Tag: accepted/tizen/unified/20230118.172025~6519^2~10
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5cdd19bbad75f6cf1c44ac494b92a3b8d8826001;p=platform%2Fkernel%2Flinux-rpi.git

media: TDA1997x: report -ENOLINK after disconnecting HDMI source

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>
---

diff --git a/drivers/media/i2c/tda1997x.c b/drivers/media/i2c/tda1997x.c
index 98b7c39..6070aaf 100644
--- a/drivers/media/i2c/tda1997x.c
+++ b/drivers/media/i2c/tda1997x.c
@@ -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++) {