Re: [PATCH v2 31/43] drm/sun4i: Add a dedicated ioctl call for allocating tiled buffers

From: Maxime Ripard
Date: Tue Nov 27 2018 - 04:03:59 EST

On Fri, Nov 23, 2018 at 11:30:20AM +0000, Brian Starkey wrote:
> Hi Paul,
> On Fri, Nov 23, 2018 at 10:25:03AM +0100, Paul Kocialkowski wrote:
> >This introduces a dedicated ioctl for allocating buffers for the VPU
> >tiling mode. It allows setting up buffers that comply to the hardware
> >alignment requirements, by aligning the stride and height to 32 bytes.
> >
> >Only YUV semiplanar and planar formats are allowed by the ioctl, as the
> >hardware does not support the tiling mode for other formats.
> What's the general feeling about a more generic version of this ioctl?
> There doesn't seem to be anything Allwinner-specific in the ioctl
> arguments.

I'm definitely in favor of having such an ioctl.


Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering

Attachment: signature.asc
Description: PGP signature