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| author | Philipp Zabel <p.zabel@pengutronix.de> | 2017-07-19 19:34:20 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-07-26 20:37:18 +0300 |
| commit | 14330d7f08bab92029f0c95c70fe200e8d76b31e (patch) | |
| tree | f1819b371d6beec4364f7c96c204dc506a9a0298 | |
| parent | 9e6b1dae37810bec45c80d478636b254db377eaa (diff) | |
| download | linux-14330d7f08bab92029f0c95c70fe200e8d76b31e.tar.xz | |
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: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
| -rw-r--r-- | drivers/staging/media/imx/imx-media-csi.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c index a2d26693912e..f2d64d1eeff8 100644 --- a/drivers/staging/media/imx/imx-media-csi.c +++ b/drivers/staging/media/imx/imx-media-csi.c @@ -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: |