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authorNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>2023-02-23 01:12:49 +0300
committerHans Verkuil <hverkuil-cisco@xs4all.nl>2023-04-11 18:10:10 +0300
commit092e321ab05459b1eb2147b3d01b05a8629f59e5 (patch)
tree790af7f1149e080b183ccb642b5c39d953a6d06c
parent8a7bc891b9ebe4ba65154d38bbe1b8b43bbb6ef4 (diff)
downloadlinux-092e321ab05459b1eb2147b3d01b05a8629f59e5.tar.xz
media: i2c: adv748x: Report correct DV timings for pattern generator
If the pattern generator is enabled the device shall not be queried for timings. Instead the timings programmed shall be reported as they are the ones being used to generate the pattern. Before this change an external HDMI source needed to be connected for the pattern generator to work. The driver would query this external HDMI source for timings and program the pattern generator using those. With this change the user can control the timings and have the pattern generator work without the need of an external HDMI source being connected. Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
-rw-r--r--drivers/media/i2c/adv748x/adv748x-hdmi.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/media/i2c/adv748x/adv748x-hdmi.c b/drivers/media/i2c/adv748x/adv748x-hdmi.c
index 47688d1b6833..400d71c2745c 100644
--- a/drivers/media/i2c/adv748x/adv748x-hdmi.c
+++ b/drivers/media/i2c/adv748x/adv748x-hdmi.c
@@ -283,6 +283,16 @@ static int adv748x_hdmi_query_dv_timings(struct v4l2_subdev *sd,
memset(timings, 0, sizeof(struct v4l2_dv_timings));
+ /*
+ * If the pattern generator is enabled the device shall not be queried
+ * for timings. Instead the timings programmed shall be reported as they
+ * are the ones being used to generate the pattern.
+ */
+ if (cp_read(state, ADV748X_CP_PAT_GEN) & ADV748X_CP_PAT_GEN_EN) {
+ *timings = hdmi->timings;
+ return 0;
+ }
+
if (!adv748x_hdmi_has_signal(state))
return -ENOLINK;