From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9D4ED47534E; Wed, 7 Oct 2026 09:55:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791366911; cv=none; b=G4RSo6X3//xK6R6sVq0HqnXLPFFq7ULuE3k/PebURAGhqns8oHc1iW42LEI/5idtS899J0NRcRN2yGLbGdID0/amx1qJfB+4e8WxTWpKcQPSQeomqygi80T1JNmvlNvGkGb2M6z1lAK6z65e8as8QbjFdH0+hEerNH8Mgk5BeU4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791366911; c=relaxed/simple; bh=8JDCl8OrL+mKV42Pt6NN+0hbgXtTIi+Z0eAqdjwBzyw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=oQxVnDlRq7KMXE3pSWnnzrLxEUHd8agvKrRhii9/SJVV8r+h5GIqeApEqxYiW5YMSCvXo6AmV3epYVeMZJNwgqvE5r3dvICiRSleFT/rUt9WYinunjwJ9+QYC1BxOOS3Cf//ol3CKm3ckdhcsFYGmH6ODgwAjiEPPkKAX9t3vsw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Ny1lOyzE; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Ny1lOyzE" 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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> --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/--