linux-kernel - [PATCH AUTOSEL 6.3 06/18] media: rcar-vin: Gen3 can not scale NV12

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Message-Id: <20230520181750.823365-6-sashal@kernel.org>
Date:   Sat, 20 May 2023 14:17:38 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Niklas Söderlund 
        <niklas.soderlund+renesas@...natech.se>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Sasha Levin <sashal@...nel.org>, niklas.soderlund@...natech.se,
        mchehab@...nel.org, linux-media@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org
Subject: [PATCH AUTOSEL 6.3 06/18] media: rcar-vin: Gen3 can not scale NV12

From: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>

[ Upstream commit 879c5a458e532b95783ce27f704d1b21573066f7 ]

The VIN modules on Gen3 can not scale NV12, fail format validation if
the user tries. Currently no frames are produced if this is attempted.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/media/platform/renesas/rcar-vin/rcar-dma.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/platform/renesas/rcar-vin/rcar-dma.c b/drivers/media/platform/renesas/rcar-vin/rcar-dma.c
index 98bfd445a649b..cc6b59e5621ae 100644
--- a/drivers/media/platform/renesas/rcar-vin/rcar-dma.c
+++ b/drivers/media/platform/renesas/rcar-vin/rcar-dma.c
@@ -1312,6 +1312,11 @@ static int rvin_mc_validate_format(struct rvin_dev *vin, struct v4l2_subdev *sd,
 	}
 
 	if (rvin_scaler_needed(vin)) {
+		/* Gen3 can't scale NV12 */
+		if (vin->info->model == RCAR_GEN3 &&
+		    vin->format.pixelformat == V4L2_PIX_FMT_NV12)
+			return -EPIPE;
+
 		if (!vin->scaler)
 			return -EPIPE;
 	} else {
-- 
2.39.2