Commit 14330d7f authored by Philipp Zabel's avatar Philipp Zabel Committed by Mauro Carvalho Chehab
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media: imx: csi: enable double write reduction 



For 4:2:0 subsampled YUV formats, avoid chroma overdraw by only writing
chroma for even lines. Reduces necessary write memory bandwidth by 25%.

Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Acked-by: default avatarSteve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent 9e6b1dae

drivers/staging/media/imx/imx-media-csi.c

+2 −0
Original line number Diff line number Diff line
@@ -357,6 +357,8 @@ static int csi_idmac_setup_channel(struct csi_priv *priv) 
		passthrough = (sensor_ep->bus_type != V4L2_MBUS_CSI2 &&

			       sensor_ep->bus.parallel.bus_width >= 16);

		passthrough_bits = 16;

		/* Skip writing U and V components to odd rows */

		ipu_cpmem_skip_odd_chroma_rows(priv->idmac_ch);

		break;

	case V4L2_PIX_FMT_YUYV:

	case V4L2_PIX_FMT_UYVY: