[PATCH 25/25] drm/armada: add iturbt_709 plane property to control YUV colorspace

[Ilia Mirkin]

On Wed, Dec 13, 2017 at 10:41 AM, Daniel Stone <daniel at fooishbar.org> wrote:
> Hi Russell,
>
> On 8 December 2017 at 12:31, Russell King <rmk+kernel at armlinux.org.uk> wrote:
>> Add the defacto-standard "iturbt_709" property to the overlay plane to
>> control the YUV to RGB colorspace conversion.  This is mutually
>> exclusive with the CSC_YUV CRTC property - the last property to be set
>> determines the resulting colorspace conversion.
>
> I haven't seen this in other drivers - is it a 'defacto standard'? I

xf86-video-nv supported it, and I added it to nouveau as well when I
ported YUV plane support. Some video players use the Xv property when
available.

https://cgit.freedesktop.org/xorg/driver/xf86-video-nv/tree/src/nv_video.c#n128
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/nouveau/dispnv04/overlay.c?h=v4.15-rc3#n316

Cheers,

  -ilia