linux-kernel - [PATCH v4 11/15] media: mt9m114: Update source pad selection and format when sink pad format changes

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Message-Id: <20251224-mt9m114-atomisp-v4-11-60b25da7a1bc@oss.qualcomm.com>
Date: Wed, 24 Dec 2025 13:31:20 +0100
From: Hans de Goede <johannes.goede@....qualcomm.com>
To: Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Hans de Goede <johannes.goede@....qualcomm.com>
Subject: [PATCH v4 11/15] media: mt9m114: Update source pad selection and
 format when sink pad format changes

Call mt9m114_ifp_update_sel_and_src_fmt() on sink pad format changes to
propagate these downstream.

This is necessary in 2 different scenarios:

1. When passing through RAW10 bypassing the scaler then any sink pad format
changes must be propagated to the crop/compose selections and to the source
pad format.

2. When the scaler is active, then the crop-rectangle cannot be bigger then
the sink pad format minus a 4 pixel border all around. If the sink format
change reduces the size then things also needs to be propagated downstream.

Rather then adding extra code to check for these conditions, simply always
propagate sink pad format changes downstream.

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Signed-off-by: Hans de Goede <johannes.goede@....qualcomm.com>
---
Changes in v4:
- Address comments from Laurent about commit message and comment wording
---
 drivers/media/i2c/mt9m114.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/media/i2c/mt9m114.c b/drivers/media/i2c/mt9m114.c
index a9162457bf649404ac2057328799f1be61558481..8e0b5bf6db621d12b36f578b6374377c69503976 100644
--- a/drivers/media/i2c/mt9m114.c
+++ b/drivers/media/i2c/mt9m114.c
@@ -1892,6 +1892,9 @@ static int mt9m114_ifp_set_fmt(struct v4l2_subdev *sd,
 		format->height = clamp(ALIGN(fmt->format.height, 8),
 				       MT9M114_PIXEL_ARRAY_MIN_OUTPUT_HEIGHT,
 				       MT9M114_PIXEL_ARRAY_HEIGHT);
+
+		/* Propagate changes downstream. */
+		mt9m114_ifp_update_sel_and_src_fmt(state);
 	} else {
 		const struct mt9m114_format_info *info;
 

-- 
2.52.0