From 092e321ab05459b1eb2147b3d01b05a8629f59e5 Mon Sep 17 00:00:00 2001 From: Niklas Söderlund Date: Wed, 22 Feb 2023 23:12:49 +0100 Subject: media: i2c: adv748x: Report correct DV timings for pattern generator MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Hans Verkuil --- drivers/media/i2c/adv748x/adv748x-hdmi.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'drivers/media/i2c/adv748x') 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; -- cgit