From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Subject: Re: [PATCH 1/2] drm/atomic: Initialise planes with opaque alpha values Date: Wed, 19 Sep 2018 19:15:45 +0300 Message-ID: <20180919161545.GH5565@intel.com> References: <20180919155700.10342-1-kieran.bingham+renesas@ideasonboard.com> <20180919155700.10342-2-kieran.bingham+renesas@ideasonboard.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Return-path: Content-Disposition: inline In-Reply-To: <20180919155700.10342-2-kieran.bingham+renesas@ideasonboard.com> Sender: linux-kernel-owner@vger.kernel.org To: Kieran Bingham Cc: Laurent Pinchart , linux-renesas-soc@vger.kernel.org, dri-devel@lists.freedesktop.org, David Airlie , Alexandru-Cosmin Gheorghe , open list , Sean Paul List-Id: dri-devel@lists.freedesktop.org On Wed, Sep 19, 2018 at 04:56:58PM +0100, Kieran Bingham wrote: > Planes without an alpha property, using __drm_atomic_helper_plane_reset > will have their plane state alpha initialised as zero, which represents > a transparent alpha. > > If this value is then used for the plane, it may not be visible by > default, and thus doesn't represent a good initialisation state. > > Update the default state->alpha value to DRM_BLEND_ALPHA_OPAQUE > unconditionally when the plane is reset. > > Signed-off-by: Kieran Bingham > --- > drivers/gpu/drm/drm_atomic_helper.c | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c > index 3cf1aa132778..e49b22381048 100644 > --- a/drivers/gpu/drm/drm_atomic_helper.c > +++ b/drivers/gpu/drm/drm_atomic_helper.c > @@ -3569,9 +3569,7 @@ void __drm_atomic_helper_plane_reset(struct drm_plane *plane, > state->plane = plane; > state->rotation = DRM_MODE_ROTATE_0; > > - /* Reset the alpha value to fully opaque if it matters */ > - if (plane->alpha_property) > - state->alpha = plane->alpha_property->values[1]; > + state->alpha = DRM_BLEND_ALPHA_OPAQUE; I can't come up with a solid excuse for not initializing it always. Reviewed-by: Ville Syrjälä > state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI; > > plane->state = state; > -- > 2.17.1 > > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- Ville Syrjälä Intel