From mboxrd@z Thu Jan 1 00:00:00 1970 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 27D1BEB64DC for ; Thu, 15 Jun 2023 10:36:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343709AbjFOKgY (ORCPT ); Thu, 15 Jun 2023 06:36:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45556 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343514AbjFOKgT (ORCPT ); Thu, 15 Jun 2023 06:36:19 -0400 Received: from smtp.domeneshop.no (smtp.domeneshop.no [IPv6:2a01:5b40:0:3006::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1314D2735; Thu, 15 Jun 2023 03:35:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=tronnes.org ; s=ds202212; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:From: References:Cc:To:Subject:MIME-Version:Date:Message-ID:Sender:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=tG5feDrl2Mw6hEmR2hb46eHTTsEGlzKg28JrQ4NlezE=; b=WJWgjqmxVqTfDmbHE1yLpH20s5 Tmnb0LR3PAcKmq0Kp++HDR5UnXFXFeS27wcsqYUnzE/xMUnvVE+se6Q+AAR/HzLUgppANR1oI2CQU +KvYjAz/eetICRUuoIAKbqzPviYLRjbrKlVOewOSf1YiNgyX0O8LUMqyRkznrPluEUU0oZc584RPZ JZUo1ow4WRtl11LY7OR/ee+MRb+uZDkazT9ISJV/OHmL9mocjaQF9m4LV/xXxhsDdXYe/t0dZKFXO +joVo25gB+GwQMke3qd89L10xraKkAQB11RiniQHHmS4/1xX8WuF/7j97Z3R0CY9rGgXq+dI4eXiK nmEA3Lnw==; Received: from [2a01:799:961:2c00:5fc6:a9a5:c042:d1cd] (port=49824) by smtp.domeneshop.no with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1q9kKW-0071lE-JM; Thu, 15 Jun 2023 12:35:52 +0200 Message-ID: <0ece62a0-2e77-190d-942e-e4fb69ef8d62@tronnes.org> Date: Thu, 15 Jun 2023 12:35:52 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.10.0 Subject: Re: [PATCH v2 3/8] dt-bindings: display: panel: mipi-dbi-spi: add spi-3wire property Content-Language: en-US To: =?UTF-8?Q?Leonard_G=c3=b6hrs?= , Conor Dooley , Rob Herring , Alexandre TORGUE , Krzysztof Kozlowski , Neil Armstrong , Sam Ravnborg , David Airlie , Daniel Vetter Cc: kernel@pengutronix.de, Conor Dooley , Rob Herring , Krzysztof Kozlowski , Conor Dooley , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, noralf@tronnes.org References: <20230614123222.4167460-1-l.goehrs@pengutronix.de> <20230614123222.4167460-4-l.goehrs@pengutronix.de> From: =?UTF-8?Q?Noralf_Tr=c3=b8nnes?= In-Reply-To: <20230614123222.4167460-4-l.goehrs@pengutronix.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6/14/23 14:32, Leonard Göhrs wrote: > 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 > Acked-by: Conor Dooley > Reviewed-by: Rob Herring > --- Reviewed-by: Noralf Trønnes > .../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