linux-kernel - [PATCH v1 5/6] media: rkisp1: Give buffers back instead of dropping in bypass mode

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Message-ID: <20260204112506.3706049-6-isaac.scott@ideasonboard.com>
Date: Wed,  4 Feb 2026 11:25:05 +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 5/6] media: rkisp1: Give buffers back instead of dropping in bypass mode

In the data mode used for YUV passthrough, falling VSYNC events are used
to determine when a buffer is complete. This means there is no 'Frame
End' signal.

Previously, all buffers would be dropped when bypass mode was active.
Instead of dropping every frame, we should return the buffer to user
space if it is marked as complete by a falling VSYNC signal.

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

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
index 867cdddf9f89..2753be39ab33 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
@@ -832,6 +832,11 @@ irqreturn_t rkisp1_capture_isr(int irq, void *ctx)
 	for (i = 0; i < dev_count; ++i) {
 		struct rkisp1_capture *cap = &rkisp1->capture_devs[i];
 
+		if (rkisp1->in_bypass) {
+			rkisp1_handle_buffer(cap);
+			continue;
+		}
+
 		if (!(status & RKISP1_CIF_MI_FRAME(cap)))
 			continue;
 		if (!cap->is_stopping) {
-- 
2.43.0