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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 01809F327AD for ; Tue, 21 Apr 2026 07:10:04 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D480710E819; Tue, 21 Apr 2026 07:09:49 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="DpZHCknN"; dkim-atps=neutral Received: from mail-oo1-f42.google.com (mail-oo1-f42.google.com [209.85.161.42]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1DA4910E0E0 for ; Tue, 21 Apr 2026 01:33:48 +0000 (UTC) Received: by mail-oo1-f42.google.com with SMTP id 006d021491bc7-6948e6bc30cso412123eaf.0 for ; Mon, 20 Apr 2026 18:33:48 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1776735227; cv=none; d=google.com; s=arc-20240605; b=O8VBNa2Jo8JbhK5ew60q6RvcmjLbUZ8KMwh6MgRPl/NYZvXxe3bvxVWH0so9+Ui+Oa kwI0YbaaKV9eUAa36lPtxdKJ4xGESVLRpuAfhYm0q5upx2onJsXfQd/bd/uEZShfhS/q ZLacERcJExBTKp4Yri0EaCJsku+ZaHR4xYDqdDc2xCTcIPTiv1mABvYqbRk2SZub9dzD q95b6nwrQM2hxkve2wMA+3jjsNWlzEdOh9lC5dmbyHCpHJeO8nbK6dHXFOhDKmIFNNGe xpknyGUt5u5PnO/iNvZdVsyd4p8n9i6ii/UbxdGPmkl2MVa0zOAj1qAXmt17W+A9kZWJ Nxdg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20240605; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:dkim-signature; bh=2ro4c5Yj9UOYed9OjkB0PmZ4Fty4O5ffP4GqAvAQb7k=; fh=gskco0se90RHIQxqTKt66j9oKDmTbXNzf4OTjGnARnQ=; b=D81w/wHkkCwF8Vs5pDg8oEni6lkJWeY4REnsNLccZNv/dnS7IGQFNDx8LaLgJctiE1 4KCgwpxrx2ZZSxW/7bSZ0JI6ONwt3iwPXNuD5VXGTDb7buDt6YHhcVTDHSWbdXGViVN0 f2UMtU/xZP3JAXMgzfUR0Cyy91lKFyuTkln9qa1JeDGMi6BN8tXDQDAxQPkDcQFMHHLV aZ51omyC3z0eoqg06JYJMXk/ll3bNDEk3FPcyXtIzAklkpEbufzFv/zIAKDUobM6A5CP 3rKzRczEUkA9qYurQT4Rpm1TzsE6JD0+6ler2pNX0JxgUnIgsh2dgxs2MBYZHEnzhN0K 4AWQ==; darn=lists.freedesktop.org ARC-Authentication-Results: i=1; mx.google.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1776735227; x=1777340027; darn=lists.freedesktop.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=2ro4c5Yj9UOYed9OjkB0PmZ4Fty4O5ffP4GqAvAQb7k=; b=DpZHCknNrcTKy3avvmBWR2pBvm9S2iBVDb2CrJ7fp1KHG68f1mQkipF/Iv+ID2vBUh RHgAzgv/EiHkEaz85fq5i9lZ+Su8//yjU5F87wTCFj9ztIdCeBGcLvMKeiGXw9aZH/Ze Ogevc1gK4bOPRk3/fQMARdlXDVKgBhq3kFJTsmgvchm8tDLNlGa5uKwDGcWcRNr+4Bfg GroCXHStvR2ke9Hv7yFJD+8HbxI5jH3fBokQ3xpzsbDqUic5wpvDYT2qPyGYwdVJiPA6 FTp4IS4syulVGOJ2m9TYvZVAOVixS9ftjabj8y2SCMou2g2N248uCd/9XmTQId56Umkz yazg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776735227; x=1777340027; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=2ro4c5Yj9UOYed9OjkB0PmZ4Fty4O5ffP4GqAvAQb7k=; b=AKcicDBVUXP9tQDTYGpIc3dJN1XkpX+3S4q78OR0x76bslcEsPqUbBBgpA3qcv41lK HonX5xgT97ePF1I4vKl7Vh8tyH03gWEtIIBNSTMtJrOIRV/XCgWai/2Tf2nwkGLgCMLr waLRG8VgGc0ZrYKICcxBrtcbcRQ2r7IBnDs2p1TavQ0qVH3JT24YBgm2gYykiUlfAN3F CBRt4IKdfpx5VGMymKSkt2XClohi9bT/KbNboR+7MlU0JPkZ0XVR/KGudmbSgO88no3u hLYdzZ98c30a1vBFRoA80RvgZM7gQvge1uM83r2fmKaPU0lDk5ekcLOwvelkQ9uFxK5c De0w== X-Forwarded-Encrypted: i=1; AFNElJ/hRVlHJCtZ5a9Rq+axr4wRVjS017SMzK4uUGeWjiEx3xNMdOGBhkPucaMNwrYcLnl2B+9oJCWA00w=@lists.freedesktop.org X-Gm-Message-State: AOJu0YwReS20uwdbvdK0nKmVXkoNFRWrNVmGWB1nHWTD8IVnZM0KmzOV NZgC1ezwGcEDZFXawO0ZoQ1YxB1h8ZW5K5JWJFe989UuMvxrfC1G3j0Tfx1zl8kSvWYqwyR2RYJ XrTkpK1hvB3dzjMupjxIFmGnhRDAdsOw= X-Gm-Gg: AeBDiesaytQGfvdjvPzFgGF9yu6DJh7vz8E9lU7MUK2PHAbT+goyVgEoef8yGMsiRhC p3BlqesmVEbagN24gi684A4ZtuboMmrKv3qIYH/bUg2OKkCPeJg4wB5R68954hFTq3NY73qH3kY LLD7FkwjNDMp+wZdl87rJnZJjKZHJuPtg7lGCMDFFt6VDKaROPVaBmI0RaNNRie5KWrlpDL20Pq uZAB6QAOTl7zWWMT4Dd8YiXS4KTbxaIcGP/wZ1ImJwGz7ZFKiySA2Kit6gudBpjOePZyEolo80I UE+oJWyZNBJYuBh1 X-Received: by 2002:a05:6820:8c3:b0:67e:447e:d1a with SMTP id 006d021491bc7-69462e21352mr8979705eaf.6.1776735227190; Mon, 20 Apr 2026 18:33:47 -0700 (PDT) MIME-Version: 1.0 References: <20260420023354.1192642-1-syyang@lontium.com> <20260420023354.1192642-2-syyang@lontium.com> In-Reply-To: From: =?UTF-8?B?5p2o5a2Z6L+Q?= Date: Tue, 21 Apr 2026 09:33:34 +0800 X-Gm-Features: AQROBzBN_QwHqnaPP8ZW4aL0Yv-pDE7geB_VDmJoG9ke-1GZvesdJrXvLgHpc-c Message-ID: Subject: Re: [PATCH 1/2] dt-bindings:bridge Add LT7911EXC binding To: Dmitry Baryshkov Cc: syyang@lontium.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andrzej.hajda@intel.com, neil.armstrong@linaro.org, maarten.lankhorst@linux.intel.com, rfoss@kernel.org, mripard@kernel.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, xmzhu@lontium.corp-partner.google.com, tzimmermann@suse.de, rlyu@lontium.com, xbpeng@lontium.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Mailman-Approved-At: Tue, 21 Apr 2026 07:09:47 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Dmitry Baryshkov =E4=BA=8E2026=E5=B9=B4= 4=E6=9C=8820=E6=97=A5=E5=91=A8=E4=B8=80 11:12=E5=86=99=E9=81=93=EF=BC=9A > > ote, your message didn't reach dri-devel. Please check why. You might > need to switch to B4 Web relay submission, if there are any issues > with the SMTP on your side. > > On Mon, 20 Apr 2026 at 05:34, wrote: > > > > From: Sunyun Yang > > > > -binding for lt7911exc. > > Less is more, but here please settle for slightly more information > about the chip. > It will be modified in the next version. > > > > Signed-off-by: Sunyun Yang > > --- > > .../display/bridge/lontium,lt7911exc.yaml | 91 +++++++++++++++++++ > > 1 file changed, 91 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/display/bridge/lo= ntium,lt7911exc.yaml > > > > diff --git a/Documentation/devicetree/bindings/display/bridge/lontium,l= t7911exc.yaml b/Documentation/devicetree/bindings/display/bridge/lontium,lt= 7911exc.yaml > > new file mode 100644 > > index 000000000000..54a73d41635a > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/display/bridge/lontium,lt7911ex= c.yaml > > @@ -0,0 +1,91 @@ > > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause > > +%YAML 1.2 > > +--- > > +$id: http://devicetree.org/schemas/display/bridge/lontium,lt7911exc.ya= ml# > > +$schema: http://devicetree.org/meta-schemas/core.yaml# > > + > > +title: Lontium LT7911EXC eDP to MIPI Bridge > > + > > +maintainers: > > + - Sunyun Yang > > + > > +properties: > > + compatible: > > + enum: > > + - lontium,lt7911exc > > + > > + reg: > > + maxItems: 1 > > + > > + reset-gpios: > > + maxItems: 1 > > + description: GPIO connected to RST_ pin. > > + > > + vdd-supply: > > + description: Regulator for 1.2V MIPI phy power. > > + > > + vcc-supply: > > + description: Regulator for 3.3V IO power. > > + > > + ports: > > + $ref: /schemas/graph.yaml#/properties/ports > > + > > + properties: > > + port@0: > > + $ref: /schemas/graph.yaml#/properties/port > > + description: Video port for mipi dsi output. > > MIPI, DSI > It will be use MIPI DSI, in the next version. > > + > > + port@1: > > + $ref: /schemas/graph.yaml#/properties/port > > + description: Video port for eDP input. > > + > > + required: > > + - port@0 > > + - port@1 > > + > > +required: > > + - compatible > > + - reg > > + - reset-gpios > > + - vdd-supply > > + - vcc-supply > > + - ports > > + > > +additionalProperties: false > > + > > +examples: > > + - | > > + #include > > + i2c { > > + #address-cells =3D <1>; > > + #size-cells =3D <0>; > > + > > + mipi-bridge@41 { > > + compatible =3D "lontium,lt7911exc"; > > + reg =3D <0x41>; > > + reset-gpios =3D <&gpy8 8 GPIO_ACTIVE_HIGH>; > > Reset pins are usually active low. > if reset pins use active low, lt7911exc_reset function needs to be modified= to: static void lt7911exc_reset(struct lt7911exc *lt7911exc) { gpiod_set_value_cansleep(lt7911exc->reset_gpio, 0); msleep(20); gpiod_set_value_cansleep(lt7911exc->reset_gpio, 1); msleep(20); gpiod_set_value_cansleep(lt7911exc->reset_gpio, 0); msleep(400); dev_dbg(lt7911exc->dev, "lt7911exc reset"); } I think the two are essentially the same. Please confirm whether I need to make the change? > > + vdd-supply =3D <<7911exc_1v2>; > > + vcc-supply =3D <<7911exc_3v3>; > > + > > + ports { > > + #address-cells =3D <1>; > > + #size-cells =3D <0>; > > + > > + port@0 { > > + reg =3D <0>; > > + > > + bridge_out: endpoint { > > + remote-endpoint =3D <&panel_in>; > > + }; > > + }; > > + > > + port@1 { > > + reg =3D <1>; > > + > > + bridge_in: endpoint { > > + remote-endpoint =3D <&edp_out>; > > + }; > > + }; > > + }; > > + }; > > + }; > > -- > With best wishes > Dmitry