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AOAM531yj33Yr7wvvHTyXSCZf5uidxmOG+Euc9F6Opm7iI3puCyHxwOL 4WaoCIuhJ+evpgqO8uHw35w= X-Google-Smtp-Source: ABdhPJxHIAsyopEvFjkiEn7R3Tg7emNd0D9NPe4cfJe5g0BeEa3RRPpayNfRzdiLK8nhhO8ESaXkvw== X-Received: by 2002:a7b:c5c4:: with SMTP id n4mr14071559wmk.67.1592840656210; Mon, 22 Jun 2020 08:44:16 -0700 (PDT) Received: from ziggy.stardust ([213.195.114.138]) by smtp.gmail.com with ESMTPSA id e25sm19510026wrc.69.2020.06.22.08.44.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 22 Jun 2020 08:44:15 -0700 (PDT) Subject: Re: [PATCH v3] drm/mediatek: check plane visibility in atomic_update To: Hsin-Yi Wang , linux-arm-kernel@lists.infradead.org, Chun-Kuang Hu Cc: Philipp Zabel , David Airlie , Daniel Vetter , dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, yongqiang.niu@mediatek.com, tfiga@chromium.org References: <20200622153106.112115-1-hsinyi@chromium.org> From: Matthias Brugger Autocrypt: addr=matthias.bgg@gmail.com; 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22/06/2020 17:31, Hsin-Yi Wang wrote: > Disable the plane if it's not visible. Otherwise mtk_ovl_layer_config() > would proceed with invalid plane and we may see vblank timeout. > > Fixes: 119f5173628a ("drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.") > Signed-off-by: Hsin-Yi Wang > Reviewed-by: Chun-Kuang Hu > Change-Id: Id5341d60ddfffc88a38d9db0caa089b2d6a1d29c Seems like the Change-Id slipped in now. Regards, Matthias > --- > v3: Address comment > v2: Add fixes tag > --- > drivers/gpu/drm/mediatek/mtk_drm_plane.c | 25 ++++++++++++++---------- > 1 file changed, 15 insertions(+), 10 deletions(-) > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c > index c2bd683a87c8..92141a19681b 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c > +++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c > @@ -164,6 +164,16 @@ static int mtk_plane_atomic_check(struct drm_plane *plane, > true, true); > } > > +static void mtk_plane_atomic_disable(struct drm_plane *plane, > + struct drm_plane_state *old_state) > +{ > + struct mtk_plane_state *state = to_mtk_plane_state(plane->state); > + > + state->pending.enable = false; > + wmb(); /* Make sure the above parameter is set before update */ > + state->pending.dirty = true; > +} > + > static void mtk_plane_atomic_update(struct drm_plane *plane, > struct drm_plane_state *old_state) > { > @@ -178,6 +188,11 @@ static void mtk_plane_atomic_update(struct drm_plane *plane, > if (!crtc || WARN_ON(!fb)) > return; > > + if (!plane->state->visible) { > + mtk_plane_atomic_disable(plane, old_state); > + return; > + } > + > gem = fb->obj[0]; > mtk_gem = to_mtk_gem_obj(gem); > addr = mtk_gem->dma_addr; > @@ -200,16 +215,6 @@ static void mtk_plane_atomic_update(struct drm_plane *plane, > state->pending.dirty = true; > } > > -static void mtk_plane_atomic_disable(struct drm_plane *plane, > - struct drm_plane_state *old_state) > -{ > - struct mtk_plane_state *state = to_mtk_plane_state(plane->state); > - > - state->pending.enable = false; > - wmb(); /* Make sure the above parameter is set before update */ > - state->pending.dirty = true; > -} > - > static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = { > .prepare_fb = drm_gem_fb_prepare_fb, > .atomic_check = mtk_plane_atomic_check, >