linux-kernel - Re: [PATCH v2 0/2] drm: vc4: Add support for additional 10/12/16bit YUV plane formats

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Message-ID: <CAPY8ntDJEyexsrQAWmzaunECxnT3F0zDzVhwe5gHmA_zAnW_8g@mail.gmail.com>
Date: Tue, 19 Aug 2025 12:28:24 +0100
From: Dave Stevenson <dave.stevenson@...pberrypi.com>
To: Robert Mader <robert.mader@...labora.com>
Cc: Maxime Ripard <mripard@...nel.org>, Maíra Canal <mcanal@...lia.com>, 
	Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>, 
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Thomas Zimmermann <tzimmermann@...e.de>, 
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, dri-devel@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/2] drm: vc4: Add support for additional 10/12/16bit
 YUV plane formats

Hi Robert

On Mon, 18 Aug 2025 at 11:46, Robert Mader <robert.mader@...labora.com> wrote:
>
> On 07.08.25 15:28, Dave Stevenson wrote:
> > We'd been asked if the S01x YUV formats could be supported on Pi5 as some
> > software codecs produce them.
> > The answer was yes, so this patch adds them and the P01x formats.
>
> I tested this with the Gstreamer MR from 1 and can confirm that the
> formats P010, P012, P016, S010 and S012 work as expected.
>
> Unfortunately S016 is not supported by Gstreamer yet - however chances
> seem high that it works as well.
>
> Thus the series is:
>
> Tested-by: Robert Mader <robert.mader@...labora.com>

Thanks for testing.

In combination with my MR to libdrm/modetest to support these
formats[1], I'm happy that S016 works.
Your testing through Gstreamer gives me confidence that I haven't
messed up both my kernel patch and modetest setup in the same way :-)

Thanks again
  Dave

[1] https://gitlab.freedesktop.org/mesa/libdrm/-/merge_requests/425

> 1: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8540
>
> >
> > Signed-off-by: Dave Stevenson <dave.stevenson@...pberrypi.com>
> > ---
> > Changes in v2:
> > - Swapped from adding an extra bool hvs6_only to having a min_gen for
> >    each format (suggested by Maíra)
> > - Link to v1: https://lore.kernel.org/r/20250724-drm-vc4-extra-formats-v1-1-67fa80597fad@raspberrypi.com
> >
> > ---
> > Dave Stevenson (2):
> >        drm/vc4: plane: Flag formats as having a minimum generation
> >        drm/vc4: plane: Add support for P01[026] and S01[026] formats
> >
> >   drivers/gpu/drm/vc4/vc4_plane.c | 56 +++++++++++++++++++++++++++++++++++------
> >   drivers/gpu/drm/vc4/vc4_regs.h  |  9 +++++++
> >   2 files changed, 58 insertions(+), 7 deletions(-)
> > ---
> > base-commit: d2b48f2b30f25997a1ae1ad0cefac68c25f8c330
> > change-id: 20250724-drm-vc4-extra-formats-1f53e6491cc1
> >
> > Best regards,
>
> --
> Robert Mader
> Consultant Software Developer
>
> Collabora Ltd.
> Platinum Building, St John's Innovation Park, Cambridge CB4 0DS, UK
> Registered in England & Wales, no. 5513718
>