linux-kernel - [PATCH v1 4/6] media: rkisp1-isp: Propagate sink -> source format in YUV passthough

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Message-ID: <20260204112506.3706049-5-isaac.scott@ideasonboard.com>
Date: Wed,  4 Feb 2026 11:25:04 +0000
From: Isaac Scott <isaac.scott@...asonboard.com>
To: linux-media@...r.kernel.org
Cc: dafna@...tmail.com,
	laurent.pinchart@...asonboard.com,
	mchehab@...nel.org,
	heiko@...ech.de,
	linux-rockchip@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Isaac Scott <isaac.scott@...asonboard.com>
Subject: [PATCH v1 4/6] media: rkisp1-isp: Propagate sink -> source format in YUV passthough

If we are in bypass mode, we should propagate the sink format of the ISP
to the source format to ensure the pipeline is valid. Ensure the source
pad format of the ISP is configured to the same format as the sink pad.

Signed-off-by: Isaac Scott <isaac.scott@...asonboard.com>
---
 drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
index 716bd7f3c66d..c457593526c5 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
@@ -630,6 +630,11 @@ static void rkisp1_isp_set_src_fmt(struct rkisp1_isp *isp,
 	 */
 	sink_info = rkisp1_mbus_info_get_by_code(sink_fmt->code);
 
+	if (sink_info->pixel_enc == V4L2_PIXEL_ENC_YUV) {
+		format->code = sink_fmt->code;
+		dev_dbg(isp->rkisp1->dev, "ISP sink pad is YUV");
+	}
+
 	src_fmt->code = format->code;
 	src_info = rkisp1_mbus_info_get_by_code(src_fmt->code);
 	if (!src_info || !(src_info->direction & RKISP1_ISP_SD_SRC)) {
-- 
2.43.0