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 90A87CA5FF1 for ; Wed, 7 Oct 2026 09:55:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C057A10E422; Wed, 7 Oct 2026 09:55:05 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="Ny1lOyzE"; dkim-atps=neutral Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by gabe.freedesktop.org (Postfix) with ESMTPS id 805BF10E422 for ; Wed, 7 Oct 2026 09:55:03 +0000 (UTC) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 70F3C60210; Wed, 7 Oct 2026 09:55:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A0E6E1F0089E; Wed, 7 Oct 2026 09:54:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1791366902; bh=8JDCl8OrL+mKV42Pt6NN+0hbgXtTIi+Z0eAqdjwBzyw=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=Ny1lOyzE2RwWpchdltjmSQrwfW0ie34h908cxxMrEkbATAaqzTa3i7wVAYW2cgzKJ GyWtZJ18tFh9CBXdU/QhZuNEn0eYnlS6I8Kh3TFBiPGJxJ4ubbVt6kQ91Y0sXRwTdT Hoy5BAemJEgRiBA34YSPb3BY78WM7r0xFFVsq+A+iAazU9Yx8bgS7y0I3g+yz1fdC3 Wt0g9X0yTkw2bT1MaDkX7Dce4S7zpUanapN8ZQJqKJaOOVDH2stEknH7dYTh4wncno cOSNd/CKKuGfFP3m94LO+QbIwaLCm5cs9ExdOdseUA6lIJ7w8vtv8VVZSc1Y3hLcIT dy5JYSAu1tmBA== Date: Wed, 7 Oct 2026 10:54:56 +0100 From: Conor Dooley To: David Lechner Cc: Neil Armstrong , Jessica Zhang , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , AngeloGioacchino Del Regno , Matthias Brugger , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: Re: [PATCH 1/4] dt-bindings: display: panel: himax,hx8279: add vddp-supply Message-ID: References: <20261006-panel-himax-hx8279-vddp-v1-0-50d884b42aae@baylibre.com> <20261006-panel-himax-hx8279-vddp-v1-1-50d884b42aae@baylibre.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="MMrK/lZdGg9SD1J/" Content-Disposition: inline In-Reply-To: <20261006-panel-himax-hx8279-vddp-v1-1-50d884b42aae@baylibre.com> 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" --MMrK/lZdGg9SD1J/ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Oct 06, 2026 at 03:25:01PM -0500, David Lechner wrote: > Add a vddp-supply property and make it required for the Startek > KD070FHFID078 panel. >=20 > The Startek KD070FHFID078 panel has a separate VDDP power input, which > feeds its DC-DC converter, in addition to VDD and IOVCC. On the MediaTek > Genio 520 and 720 EVKs, VDDP is switched by its own GPIO-controlled > regulator, and on the Genio 1200 EVK it comes from its own PMIC LDO. > In both cases it is separate from the other two supplies, so it needs to > be described to power the panel. >=20 > Making it required means existing device trees with this panel without > it no longer validate. This is ok since the Linux driver will still work > with them because the regulator core uses a dummy regulator for any > missing supply. And anyone who sees the warning about the missing > supply should add it to their device tree. >=20 > It stays optional for the Aoly SL101PM1794FOG-V15 panel, as it is not > known whether that panel has a VDDP input. Acked-by: Conor Dooley pw-bot: not-applicable --MMrK/lZdGg9SD1J/ Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iHUEARYKAB0WIQRh246EGq/8RLhDjO14tDGHoIJi0gUCasYW8AAKCRB4tDGHoIJi 0vXbAP9Pa+6o9Kvfp8rFOQt+MoySArv1ZxQQvEAhhO5aRzql7wEAsA3Sa8wW8ZfX tpdF/lVwu2hYNt2s6KZ1TfaX77j5rgw= =Mwgg -----END PGP SIGNATURE----- --MMrK/lZdGg9SD1J/--