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

On Sat, 2017-07-22 at 14:21 -0700, Steve Longerbeam wrote: > For the write channels with 4:2:0 subsampled YUV formats, avoid chroma > overdraw by only writing chroma for even lines. Reduces necessary write > memory bandwidth by at least 25% (more with rotation enabled). > > Signed-off-by: Steve

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

Hi Steve, On Sat, 2017-07-22 at 15:04 -0700, Steve Longerbeam wrote: > Hi Philipp, > > This is the same as your patch to CSI, applied to ic-prpencvf. > > I'm not really sure what this cpmem bit is doing. The U/V planes > in memory are already subsampled by 2 in both width and height. > This

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

Hi Philipp, This is the same as your patch to CSI, applied to ic-prpencvf. I'm not really sure what this cpmem bit is doing. The U/V planes in memory are already subsampled by 2 in both width and height. This must be referring to what the IDMAC is transferring on the bus, but why would it place

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

For the write channels with 4:2:0 subsampled YUV formats, avoid chroma overdraw by only writing chroma for even lines. Reduces necessary write memory bandwidth by at least 25% (more with rotation enabled). Signed-off-by: Steve Longerbeam ---