From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexandru-Cosmin.Gheorghe@arm.com (Alexandru-Cosmin Gheorghe) Date: Tue, 24 Jul 2018 09:11:21 +0100 Subject: [PATCH 09/10] drm/vc4: Use __drm_atomic_helper_plane_reset instead of copying the logic In-Reply-To: <20180724065720.5bhepamdo57it7nl@flea> References: <20180713161407.GQ20303@art_vandelay> <20180720211509.23605-1-alexandru-cosmin.gheorghe@arm.com> <20180720211509.23605-10-alexandru-cosmin.gheorghe@arm.com> <20180724065720.5bhepamdo57it7nl@flea> Message-ID: <20180724081121.GA22689@e114479-lin.cambridge.arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Maxime, On Tue, Jul 24, 2018 at 08:57:20AM +0200, Maxime Ripard wrote: > On Fri, Jul 20, 2018 at 10:15:08PM +0100, Alexandru Gheorghe wrote: > > Signed-off-by: Alexandru Gheorghe > > --- > > drivers/gpu/drm/vc4/vc4_plane.c | 4 +--- > > 1 file changed, 1 insertion(+), 3 deletions(-) > > > > diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c > > index 9d7a36f148cf..688ad9bb0f08 100644 > > --- a/drivers/gpu/drm/vc4/vc4_plane.c > > +++ b/drivers/gpu/drm/vc4/vc4_plane.c > > @@ -200,9 +200,7 @@ static void vc4_plane_reset(struct drm_plane *plane) > > if (!vc4_state) > > return; > > > > - plane->state = &vc4_state->base; > > - plane->state->alpha = DRM_BLEND_ALPHA_OPAQUE; > > - vc4_state->base.plane = plane; > > + __drm_atomic_helper_plane_reset(plane, &vc4_state->base); > > For vc4, rcar-du, atmel-hlcdc and sun4i, you're changing the reset > value of alpha from DRM_BLEND_ALPHA_OPAQUE to > plane->alpha_property->values[1]. plane->alpha_property->values[1] holds the max value for alpha, and it's initialized by the core to DRM_BLEND_ALPHA_OPAQUE. > > This might or might not be a good idea, but you should definitely > explain why. Would a commit message suffice? Or do you have other ideas? > > Maxime > > -- > Maxime Ripard, Bootlin (formerly Free Electrons) > Embedded Linux and Kernel engineering > https://bootlin.com -- Cheers, Alex G