linux-kernel - [PATCH v2] media: pci: mgb4: Fix timings comparison in VIDIOC_S_DV

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Message-ID: <20250826162829.4434-1-tumic@gpxsee.org>
Date: Tue, 26 Aug 2025 18:28:29 +0200
From: tumic@...see.org
To: Mauro Carvalho Chehab <mchehab@...nel.org>,
	Hans Verkuil <hverkuil@...all.nl>
Cc: linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Martin Tůma <martin.tuma@...iteqautomotive.com>
Subject: [PATCH v2] media: pci: mgb4: Fix timings comparison in VIDIOC_S_DV_TIMINGS

From: Martin Tůma <martin.tuma@...iteqautomotive.com>

Compare the whole v4l2_bt_timings struct, not just the width/height when
setting new timings. Timings with the same resolution and different
pixelclock can now be properly set.

Signed-off-by: Martin Tůma <martin.tuma@...iteqautomotive.com>
---
 drivers/media/pci/mgb4/mgb4_vin.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/media/pci/mgb4/mgb4_vin.c b/drivers/media/pci/mgb4/mgb4_vin.c
index 989e93f67f75..42c327bc50e1 100644
--- a/drivers/media/pci/mgb4/mgb4_vin.c
+++ b/drivers/media/pci/mgb4/mgb4_vin.c
@@ -610,8 +610,7 @@ static int vidioc_s_dv_timings(struct file *file, void *fh,
 	    timings->bt.height < video_timings_cap.bt.min_height ||
 	    timings->bt.height > video_timings_cap.bt.max_height)
 		return -EINVAL;
-	if (timings->bt.width == vindev->timings.bt.width &&
-	    timings->bt.height == vindev->timings.bt.height)
+	if (v4l2_match_dv_timings(timings, &vindev->timings, 0, false))
 		return 0;
 	if (vb2_is_busy(&vindev->queue))
 		return -EBUSY;

base-commit: a75b8d198c55e9eb5feb6f6e155496305caba2dc
-- 
2.51.0