Re: [PATCH] drm: Use horizontal and vertical chroma subsampling factor while calculating offsets in the physical address of framebuffer

On Mon, Aug 20, 2018 at 01:38:59PM +0100, Ayan Halder wrote: > On Mon, Aug 20, 2018 at 12:03:19PM +0100, Liviu Dudau wrote: > > On Fri, Aug 17, 2018 at 06:33:04PM +0100, Ayan Kumar Halder wrote: > > > For multi-planar formats, while calculating offsets in planes with index > > > greater than 0 >

Re: [PATCH] drm: Use horizontal and vertical chroma subsampling factor while calculating offsets in the physical address of framebuffer

On Mon, Aug 20, 2018 at 12:03:19PM +0100, Liviu Dudau wrote: > On Fri, Aug 17, 2018 at 06:33:04PM +0100, Ayan Kumar Halder wrote: > > For multi-planar formats, while calculating offsets in planes with index > > greater than 0 > > (ie second plane, third plane, etc), one needs to divide (src_x *

Re: [PATCH] drm: Use horizontal and vertical chroma subsampling factor while calculating offsets in the physical address of framebuffer

On Fri, Aug 17, 2018 at 06:33:04PM +0100, Ayan Kumar Halder wrote: > For multi-planar formats, while calculating offsets in planes with index > greater than 0 > (ie second plane, third plane, etc), one needs to divide (src_x * cpp) with > horizontal > chroma subsampling factor and (src_y *

[PATCH] drm: Use horizontal and vertical chroma subsampling factor while calculating offsets in the physical address of framebuffer

For multi-planar formats, while calculating offsets in planes with index greater than 0 (ie second plane, third plane, etc), one needs to divide (src_x * cpp) with horizontal chroma subsampling factor and (src_y * pitch) with vertical chroma subsampling factor. The reason being that the planes