Re: [PATCH 1/2] drm/verisilicon: set blend mode for the primary plane

[Thomas Zimmermann]

Hi

Am 10.09.26 um 09:09 schrieb Icenowy Zheng:
> 在 2026-09-02三的 01:17 +0800，Icenowy Zheng写道：
> > Blend modes are now required to expose pixel formats w/ alpha.
> >
> > As it's the primary plane and blending is explicitly disabled, just
> > expose PIXEL_NONE blend mode.
> Gently ping for reviews.

What do these alpha formats do?  Are they a hardware feature?  It looks 
like they are programmable, but don't differ from XRGB at all.

Best regards
Thomas

> Thanks,
> Icenowy
>
> > Signed-off-by: Icenowy Zheng <zhengxingda@xxxxxxxxxxx>
> > ---
> >   drivers/gpu/drm/verisilicon/vs_primary_plane.c | 3 +++
> >   1 file changed, 3 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/verisilicon/vs_primary_plane.c
> > b/drivers/gpu/drm/verisilicon/vs_primary_plane.c
> > index 1f2be41ae496c..8d58682d88ef8 100644
> > --- a/drivers/gpu/drm/verisilicon/vs_primary_plane.c
> > +++ b/drivers/gpu/drm/verisilicon/vs_primary_plane.c
> > @@ -7,6 +7,7 @@
> >   
> >   #include <drm/drm_atomic.h>
> >   #include <drm/drm_atomic_helper.h>
> > +#include <drm/drm_blend.h>
> >   #include <drm/drm_crtc.h>
> >   #include <drm/drm_fourcc.h>
> >   #include <drm/drm_framebuffer.h>
> > @@ -179,5 +180,7 @@ struct drm_plane *vs_primary_plane_init(struct
> > drm_device *drm_dev, struct vs_dc
> >   
> >   	drm_plane_helper_add(plane, &vs_primary_plane_helper_funcs);
> >   
> > +	drm_plane_create_blend_mode_property(plane,
> > +					
> > BIT(DRM_MODE_BLEND_PIXEL_NONE));
> >   	return plane;
> >   }

--
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com
GF: Jochen Jaser, Andrew McDonald, (HRB 36809, AG Nürnberg)