Re: [PATCH v2] modetest: initialize handles/pitches in set_plane()

Hello Ilia,

On 2015-04-21 21:15, Ilia Mirkin wrote:

I know it was immensely useful to me when I was adding YUV plane support to nouveau. Seemed to work as advertised at the time (1.5y ago) for YUYV, UYVY, and NV12.

-ilia

maybe you can help me with that question.

Let's consider a user of the DRM interface that wants to feed NV12 data to it. NV12 is bi-planar, so the user should provide two handles/pitches/offsets describing chroma and luma plane respectively. But most of the time chroma and luma is contiguous in memory, with nothing in between.

I was wondering if it is an allowed setup to request NV12 as pixelformat, but only to provide _one_ handle/pitch/offset? (implying that we are in the contiguous setting)

With best wishes, Tobias