linux-kernel - Re: [PATCH RFC v6 01/10] drm: Introduce pixel

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Date:   Thu, 19 Oct 2023 12:45:26 +0200
From:   Sebastian Wick <sebastian.wick@...hat.com>
To:     Pekka Paalanen <ppaalanen@...il.com>
Cc:     Jessica Zhang <quic_jesszhan@...cinc.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Clark <robdclark@...il.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        quic_abhinavk@...cinc.com, contact@...rsion.fr,
        laurent.pinchart@...asonboard.com, ville.syrjala@...ux.intel.com,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
        wayland-devel@...ts.freedesktop.org
Subject: Re: [PATCH RFC v6 01/10] drm: Introduce pixel_source DRM plane
 property

On Tue, Aug 29, 2023 at 10:48:16AM +0300, Pekka Paalanen wrote:
> On Mon, 28 Aug 2023 17:05:07 -0700
> Jessica Zhang <quic_jesszhan@...cinc.com> wrote:
> 
> > Add support for pixel_source property to drm_plane and related
> > documentation. In addition, force pixel_source to
> > DRM_PLANE_PIXEL_SOURCE_FB in DRM_IOCTL_MODE_SETPLANE as to not break
> > legacy userspace.
> > 
> > This enum property will allow user to specify a pixel source for the
> > plane. Possible pixel sources will be defined in the
> > drm_plane_pixel_source enum.
> > 
> > Currently, the only pixel sources are DRM_PLANE_PIXEL_SOURCE_FB (the
> > default value) and DRM_PLANE_PIXEL_SOURCE_NONE.
> > 
> > Signed-off-by: Jessica Zhang <quic_jesszhan@...cinc.com>
> > ---
> >  drivers/gpu/drm/drm_atomic_state_helper.c |  1 +
> >  drivers/gpu/drm/drm_atomic_uapi.c         |  4 ++
> >  drivers/gpu/drm/drm_blend.c               | 90 +++++++++++++++++++++++++++++++
> >  drivers/gpu/drm/drm_plane.c               | 19 +++++--
> >  include/drm/drm_blend.h                   |  2 +
> >  include/drm/drm_plane.h                   | 21 ++++++++
> >  6 files changed, 133 insertions(+), 4 deletions(-)
> 
> ...
> 
> > diff --git a/drivers/gpu/drm/drm_blend.c b/drivers/gpu/drm/drm_blend.c
> > index 6e74de833466..c3c57bae06b7 100644
> > --- a/drivers/gpu/drm/drm_blend.c
> > +++ b/drivers/gpu/drm/drm_blend.c
> > @@ -185,6 +185,21 @@
> >   *		 plane does not expose the "alpha" property, then this is
> >   *		 assumed to be 1.0
> >   *
> > + * pixel_source:
> > + *	pixel_source is set up with drm_plane_create_pixel_source_property().
> > + *	It is used to toggle the active source of pixel data for the plane.
> > + *	The plane will only display data from the set pixel_source -- any
> > + *	data from other sources will be ignored.
> > + *
> > + *	Possible values:
> > + *
> > + *	"NONE":
> > + *		No active pixel source.
> > + *		Committing with a NONE pixel source will disable the plane.
> > + *
> > + *	"FB":
> > + *		Framebuffer source set by the "FB_ID" property.
> > + *
> >   * Note that all the property extensions described here apply either to the
> >   * plane or the CRTC (e.g. for the background color, which currently is not
> >   * exposed and assumed to be black).
> 
> This UAPI:
> Acked-by: Pekka Paalanen <pekka.paalanen@...labora.com>

Thanks Jessica, same for me

Acked-by: Sebastian Wick <sebastian@...astianwick.net>

> 
> 
> Thanks,
> pq