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[2620:137:e000::1:20]) by mx.google.com with ESMTP id k71-20020a63844a000000b00545072f800fsi560377pgd.320.2023.06.07.05.12.07; Wed, 07 Jun 2023 05:12:22 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233152AbjFGL45 (ORCPT + 99 others); Wed, 7 Jun 2023 07:56:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46930 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239529AbjFGL4y (ORCPT ); Wed, 7 Jun 2023 07:56:54 -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 918FF1BC7 for ; Wed, 7 Jun 2023 04:56:53 -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 1q6rmN-00006J-O9; Wed, 07 Jun 2023 13:56:43 +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 1q6rmN-005jFg-2L; Wed, 07 Jun 2023 13:56:43 +0200 Received: from lgo by dude03.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1q6rmM-00CSxV-4q; Wed, 07 Jun 2023 13:56:42 +0200 From: =?UTF-8?q?Leonard=20G=C3=B6hrs?= To: =?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?= , Rob Herring , Krzysztof Kozlowski , Conor Dooley , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 2/8] dt-bindings: display: panel: mipi-dbi-spi: add spi-3wire property Date: Wed, 7 Jun 2023 13:55:01 +0200 Message-Id: <20230607115508.2964574-2-l.goehrs@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230607115508.2964574-1-l.goehrs@pengutronix.de> References: <20230607115508.2964574-1-l.goehrs@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net 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 Göhrs --- .../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.yaml +++ b/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml @@ -87,6 +87,8 @@ properties: Logic level supply for interface signals (Vddi). No need to set if this is the same as power-supply. + spi-3wire: true + required: - compatible - reg -- 2.39.2