From nobody Tue Feb 10 03:39:14 2026 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 A8022EB64DC for ; Wed, 14 Jun 2023 12:33:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244621AbjFNMd2 (ORCPT ); Wed, 14 Jun 2023 08:33:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38618 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244608AbjFNMdX (ORCPT ); Wed, 14 Jun 2023 08:33:23 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7E1AA211D for ; Wed, 14 Jun 2023 05:33:05 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1q9Pg8-00017H-2H; Wed, 14 Jun 2023 14:32:48 +0200 Received: from [2a0a:edc0:0:1101:1d::39] (helo=dude03.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1q9Pg6-007LpS-Qa; Wed, 14 Jun 2023 14:32:46 +0200 Received: from lgo by dude03.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1q9Pg5-00HUJu-Vn; Wed, 14 Jun 2023 14:32:46 +0200 From: =?UTF-8?q?Leonard=20G=C3=B6hrs?= To: Conor Dooley , Rob Herring , Alexandre TORGUE , Krzysztof Kozlowski , =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= , Neil Armstrong , Sam Ravnborg , David Airlie , Daniel Vetter Cc: kernel@pengutronix.de, =?UTF-8?q?Leonard=20G=C3=B6hrs?= , Conor Dooley , Rob Herring , Krzysztof Kozlowski , Conor Dooley , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 3/8] dt-bindings: display: panel: mipi-dbi-spi: add spi-3wire property Date: Wed, 14 Jun 2023 14:32:17 +0200 Message-Id: <20230614123222.4167460-4-l.goehrs@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230614123222.4167460-1-l.goehrs@pengutronix.de> References: <20230614123222.4167460-1-l.goehrs@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: lgo@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some MIPI DBI panels support a three wire mode (clock, chip select, bidirectional data) that can be used to ask the panel if it is already set up by e.g. the bootloader and can thus skip the initialization. This enables a flicker-free boot. Signed-off-by: Leonard G=C3=B6hrs Acked-by: Conor Dooley Reviewed-by: Rob Herring Reviewed-by: Noralf Tr=C3=B8nnes --- .../devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi= -spi.yaml b/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-= spi.yaml index c07da1a9e6288..2f0238b770eba 100644 --- a/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.ya= ml +++ b/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.ya= ml @@ -87,6 +87,8 @@ properties: Logic level supply for interface signals (Vddi). No need to set if this is the same as power-supply. =20 + spi-3wire: true + required: - compatible - reg --=20 2.39.2