[PATCH] [media] imx: csi: enable double write reduction

2017-07-19 Thread Philipp Zabel
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 --- drivers/staging/media/imx/imx-media-csi.c | 6 ++ 1 file changed, 6 insertions(+) diff --git a/drivers/staging/med

Re: [PATCH] [media] imx: csi: enable double write reduction

2017-07-19 Thread Steve Longerbeam
Hi Philipp, On 07/19/2017 05:22 AM, Philipp Zabel wrote: 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 --- drivers/staging/media/imx/imx-media-csi.c | 6 ++ 1 f

Re: [PATCH] [media] imx: csi: enable double write reduction

2017-07-19 Thread Philipp Zabel
Hi Steve, On Wed, 2017-07-19 at 09:18 -0700, Steve Longerbeam wrote: > Hi Philipp, > > On 07/19/2017 05:22 AM, Philipp Zabel wrote: > > For 4:2:0 subsampled YUV formats, avoid chroma overdraw by only writing > > chroma for even lines. Reduces necessary write memory bandwidth by 25%. > > > > Sign