[PATCH 5/5] media: mtk-vcodec: Don't try to decode 422/444 VP9

[Sebastian Fricke]

From: Nicolas Dufresne <nicolas.dufresne@xxxxxxxxxxxxx>

This is not supported by the hardware and trying to decode
these leads to LAT timeout errors.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@xxxxxxxxxxxxx>
---
 .../platform/mediatek/vcodec/decoder/mtk_vcodec_dec_stateless.c     | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_stateless.c b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_stateless.c
index 9187d7bcfc8aea17f3fc98d94419777d8026db51..3dbd251034b85e521c3c93538d9ecf9078ef3820 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_stateless.c
+++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_stateless.c
@@ -496,6 +496,12 @@ static int mtk_vdec_s_ctrl(struct v4l2_ctrl *ctrl)
 			mtk_v4l2_vdec_err(ctx, "VP9: bit_depth:%d", frame->bit_depth);
 			return -EINVAL;
 		}
+
+		if (!(frame->flags & V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING) ||
+		    !(frame->flags & V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING)) {
+			mtk_v4l2_vdec_err(ctx, "VP9: only 420 subsampling is supported");
+			return -EINVAL;
+		}
 		break;
 	case V4L2_CID_STATELESS_AV1_SEQUENCE:
 		seq = (struct v4l2_ctrl_av1_sequence *)hdr_ctrl->p_new.p;

-- 
2.34.1