From nobody Fri Dec 19 19:19:24 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A49ABC04A6A for ; Tue, 18 Jul 2023 16:55:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233367AbjGRQzR (ORCPT ); Tue, 18 Jul 2023 12:55:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58034 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232030AbjGRQy6 (ORCPT ); Tue, 18 Jul 2023 12:54:58 -0400 Received: from albert.telenet-ops.be (albert.telenet-ops.be [IPv6:2a02:1800:110:4::f00:1a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0526D199D for ; Tue, 18 Jul 2023 09:54:54 -0700 (PDT) Received: from ramsan.of.borg ([IPv6:2a02:1810:ac12:ed40:5803:2d6d:5bbc:e252]) by albert.telenet-ops.be with bizsmtp id Ngur2A0080ucMBo06gurSX; Tue, 18 Jul 2023 18:54:52 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtp (Exim 4.95) (envelope-from ) id 1qLnyD-001nXe-30; Tue, 18 Jul 2023 18:54:51 +0200 Received: from geert by rox.of.borg with local (Exim 4.95) (envelope-from ) id 1qLnyN-000gbQ-4A; Tue, 18 Jul 2023 18:54:51 +0200 From: Geert Uytterhoeven To: Laurent Pinchart , Kieran Bingham , David Airlie , Daniel Vetter , Thomas Zimmermann , Magnus Damm Cc: linux-renesas-soc@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven , Laurent Pinchart Subject: [PATCH v2 04/41] drm: renesas: shmobile: Fix overlay plane disable Date: Tue, 18 Jul 2023 18:54:09 +0200 Message-Id: X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Merely writing zero to the CHn Source Image Format Register is not sufficient to disable a plane, as the programmed register value is not propagated immediately to the current side. This can be seen when using the -P option of modetest: the extra plane is displayed correctly, but does not disappear after exit. Fix this by doing the full update dance using the Blend Control Register, like is done when enabling the plane. Signed-off-by: Geert Uytterhoeven Reviewed-by: Laurent Pinchart --- v2: - Add Reviewed-by. --- drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.c b/drivers/g= pu/drm/renesas/shmobile/shmob_drm_plane.c index 850986cee848226a..0e34573c3cb3d032 100644 --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.c +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.c @@ -215,7 +215,10 @@ static int shmob_drm_plane_disable(struct drm_plane *p= lane, =20 splane->format =3D NULL; =20 + lcdc_write(sdev, LDBCR, LDBCR_UPC(splane->index)); lcdc_write(sdev, LDBnBSIFR(splane->index), 0); + lcdc_write(sdev, LDBCR, + LDBCR_UPF(splane->index) | LDBCR_UPD(splane->index)); return 0; } =20 --=20 2.34.1