On Thu, 1 Dec 2022 at 11:07, Daniel Vetter <daniel@xxxxxxxx> wrote: > > On Wed, Nov 23, 2022 at 08:24:37PM +0100, Daniel Vetter wrote: > > It's a bit a FAQ, and we really can't claim to be the authoritative > > source for allocating these numbers used in many standard extensions > > if we tell closed source or vendor stacks in general to go away. > > > > Iirc this was already clarified in some vulkan discussions, but I > > can't find that anywhere anymore. At least not in a public link. > > > > Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> > > Cc: Maxime Ripard <mripard@xxxxxxxxxx> > > Cc: Thomas Zimmermann <tzimmermann@xxxxxxx> > > Cc: David Airlie <airlied@xxxxxxxxx> > > Cc: Daniel Vetter <daniel@xxxxxxxx> > > Cc: Alex Deucher <alexdeucher@xxxxxxxxx> > > Cc: Daniel Stone <daniel@xxxxxxxxxxxxx> > > Cc: Bas Nieuwenhuizen <bas@xxxxxxxxxxxxxxxxxxx> > > Cc: Jason Ekstrand <jason@xxxxxxxxxxxxxx> > > Cc: Neil Trevett <ntrevett@xxxxxxxxxx> > > Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx> > > From irc: > > <airlied> danvet: ack from me Also from irc: <mareko> danvet: Acked -Daniel > > --- > > include/uapi/drm/drm_fourcc.h | 12 ++++++++++++ > > 1 file changed, 12 insertions(+) > > > > diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h > > index bc056f2d537d..de703c6be969 100644 > > --- a/include/uapi/drm/drm_fourcc.h > > +++ b/include/uapi/drm/drm_fourcc.h > > @@ -88,6 +88,18 @@ extern "C" { > > * > > * The authoritative list of format modifier codes is found in > > * `include/uapi/drm/drm_fourcc.h` > > + * > > + * Open Source User Waiver > > + * ----------------------- > > + * > > + * Because this is the authoritative source for pixel formats and modifiers > > + * referenced by GL, Vulkan extensions and other standards and hence used both > > + * by open source and closed source driver stacks, the usual requirement for an > > + * upstream in-kernel or open source userspace user does not apply. > > + * > > + * To ensure, as much as feasible, compatibility across stacks and avoid > > + * confusion with incompatible enumerations stakeholders for all relevant driver > > + * stacks should approve additions. > > */ > > > > #define fourcc_code(a, b, c, d) ((__u32)(a) | ((__u32)(b) << 8) | \ > > -- > > 2.37.2 > > > > -- > Daniel Vetter > Software Engineer, Intel Corporation > http://blog.ffwll.ch -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch