linux-kernel - [PATCH v2 07/13] media: verisilicon: Check AV1 bitstreams bit depth

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Date:   Tue,  3 Jan 2023 18:00:52 +0100
From:   Benjamin Gaignard <benjamin.gaignard@...labora.com>
To:     ezequiel@...guardiasur.com.ar, p.zabel@...gutronix.de,
        mchehab@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, heiko@...ech.de,
        daniel.almeida@...labora.com, nicolas.dufresne@...labora.co.uk
Cc:     linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, kernel@...labora.com,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>
Subject: [PATCH v2 07/13] media: verisilicon: Check AV1 bitstreams bit depth

The driver supports 8 and 10 bits bitstreams, make sure to discard
other cases.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
---
 drivers/media/platform/verisilicon/hantro_drv.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/verisilicon/hantro_drv.c b/drivers/media/platform/verisilicon/hantro_drv.c
index 8e93710dcfed..16539e89935c 100644
--- a/drivers/media/platform/verisilicon/hantro_drv.c
+++ b/drivers/media/platform/verisilicon/hantro_drv.c
@@ -282,7 +282,13 @@ static int hantro_try_ctrl(struct v4l2_ctrl *ctrl)
 		/* We only support profile 0 */
 		if (dec_params->profile != 0)
 			return -EINVAL;
+	} else if (ctrl->id == V4L2_CID_STATELESS_AV1_SEQUENCE) {
+		const struct v4l2_ctrl_av1_sequence *sequence = ctrl->p_new.p_av1_sequence;
+
+		if (sequence->bit_depth != 8 && sequence->bit_depth != 10)
+			return -EINVAL;
 	}
+
 	return 0;
 }
 
@@ -333,7 +339,13 @@ static int hantro_av1_s_ctrl(struct v4l2_ctrl *ctrl)
 
 	switch (ctrl->id) {
 	case V4L2_CID_STATELESS_AV1_SEQUENCE:
-		ctx->bit_depth = ctrl->p_new.p_av1_sequence->bit_depth;
+		int bit_depth = ctrl->p_new.p_av1_sequence->bit_depth;
+
+		if (vb2_is_streaming(v4l2_m2m_get_src_vq(ctx->fh.m2m_ctx)))
+			if (ctx->bit_depth != bit_depth)
+				return -EINVAL;
+
+		ctx->bit_depth = bit_depth;
 		break;
 	default:
 		return -EINVAL;
-- 
2.34.1