linux-kernel - Re: [PATCH v3 06/11] drm/fourcc: Add DRM_FORMAT

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Message-ID: <naw67daoyb2lfmq4jovlwanz5niaolptwnug3c3kkrtlfoh6dd@trkctqyzvtb5>
Date: Tue, 18 Feb 2025 05:26:54 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Cc: Vishal Sagar <vishal.sagar@....com>, 
	Anatoliy Klymenko <anatoliy.klymenko@....com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
	Laurent Pinchart <laurent.pinchart@...asonboard.com>, Michal Simek <michal.simek@....com>, 
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: [PATCH v3 06/11] drm/fourcc: Add DRM_FORMAT_XVUY2101010

On Mon, Feb 17, 2025 at 10:27:56PM +0200, Tomi Valkeinen wrote:
> Hi,
> 
> On 17/02/2025 22:15, Dmitry Baryshkov wrote:
> > On Wed, Feb 12, 2025 at 04:56:10PM +0200, Tomi Valkeinen wrote:
> > > Add XVUY2101010, a 10 bits per component YCbCr format in a 32 bit
> > > container.
> > 
> > Is there a more common name for this format? Otherwise googling for it
> > reveals only your series.
> 
> In the cover letter I mention the gstreamer names where available (this
> particular format is not in gstreamer). AMD has these in their zynqmp
> documentation (https://docs.amd.com/r/en-US/ug1085-zynq-ultrascale-trm/Video-Packer-Format).
> 
> XVUY2101010 is YUV444_10BPC in AMD docs.
> 
> X403 is Y444_10LE32 in gstreamer, and YV24_10BPC in AMD docs.
> 
> I'm not sure you'll have much more luck googling with those names, though
> =).

I'm asking, because include/uapi/drm/drm_fourcc.h has a pretty explicit
waiver: GL, Vulkan or other open standards. Otherwise normal
requirements apply and it's required to have an open-source usespace
implementation, etc.

-- 
With best wishes
Dmitry