Revert "media: renesas: vsp1: brx: Fix format propagation"

This reverts commit 937f3e6.

The change to format propagation in the BRx broke configuration of the
DRM pipeline. Revert it to fix the regression.

The original commit was meant to fix a v4l2-compliance failure, with no
known userspace applications being affected beside test tools. Reverting
is the simplest option, a more comprehensive fix can be developed (and
tested more thoroughly) later.

Reported-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Closes: https://lore.kernel.org/linux-media/CA+V-a8t481xuwava0nb7uY9CUPqFWZ_8EP0xrK3BgumP7HDcLg@mail.gmail.com
Fixes: 937f3e6 ("media: renesas: vsp1: brx: Fix format propagation")
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> # On RZ/T2H
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/20260506215650.1897177-3-laurent.pinchart+renesas@ideasonboard.com
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

Author: Laurent Pinchart

drivers/media/platform/renesas/vsp1/vsp1_brx.c

@@ -156,20 +156,14 @@ static int brx_set_format(struct v4l2_subdev *subdev,
 		compose->height = format->height;
 	}
 
-	/*
-	 * Propagate the format code to all pads, and the whole format to the
-	 * source pad.
-	 */
+	/* Propagate the format code to all pads. */
 	if (fmt->pad == BRX_PAD_SINK(0)) {
 		unsigned int i;
 
-		for (i = 0; i < brx->entity.source_pad; ++i) {
+		for (i = 0; i <= brx->entity.source_pad; ++i) {
 			format = v4l2_subdev_state_get_format(state, i);
 			format->code = fmt->format.code;
 		}
-
-		format = v4l2_subdev_state_get_format(state, i);
-		*format = fmt->format;
 	}
 
 done: