From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794315916; b=op6iOVdzVKmfQ3MzmeRYnF/aY2fZ8p97wf4wsAlUwO/+Sym15FVEq1PVNdOGDtBs6Q2k 5E79k9dr8kqS6vwnpujjb53QL8ofeKJokPFVOOUZ2JJcRQyXmOwpDVOgQCNpRgBijzk5M X5O8vpKydUljTcNVKfTlJfOyxKnjB7c4n+V8ojl9ctPE+VKLIsz90oimSWIbsigJadbAS Y1vt1wOxdM3O9MD2CgYAgvp7Ye8/lSzk3DXON64EMhFRJohsWyVor55IjzG1EHaqj//0S gFPUjiPgfiOE/M8uiLo2eAjf1k7MkCv1DIEZggs+wSMAP00LqU7SRMI+IrZsa8DSuJg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794315916; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=MBoMybViYwhw6nSYk7WOZTfocy/4HWn5nwGt1dyl8yY=; b=rQZmGkiGDfIeCcLXfbO9gjWGwaQT54GdnNFquHTIJYSfQA6JkN49SxnP+Bf+BmPw86p8 kpsohK+awjsUDpyvyZGu+Czwvw8Y1EEHnyucJvx3kQzi7gRO0n1eSGBwSQX2tDF6IAGqM 93BJFkFxpNEJxjLZGMI+K8FF2PHBPvxhUOksqJufb1cQvqUGijQzdVtkzib8D8fDz+SKI EjuK+JppTdytm7QVL95JwNnAysILUKsuJ9piM4O0HzLiocGGoaV57/I3VGA8isXrarc3V /auc9OFNwttk4VH9KyVagtXGq6YxpXAl0TyQmYiqqRQHmeMWaiA5nKNuZprLJb3K4sw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Vuu3b3LC; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A0307606A336; Tue, 10 Nov 2026 13:05:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Vuu3b3LC Received: by smtp.kernel.org (Postfix) with ESMTPSA id 027DF1F0089F; Tue, 10 Nov 2026 13:05:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794315916; bh=MBoMybViYwhw6nSYk7WOZTfocy/4HWn5nwGt1dyl8yY=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=Vuu3b3LCWUv0/eF3lz7jUcEZVs9jqVhBsDLONVZGlavb/6XHlC5bjur5b5gMphmuf KEBt/T3I7FmSCjgryFiCneLA3aeYVdBQqaDTcSTgJZ+7lIqqSW732cn3+1jK7wZagT x/QC/ajdeZ7tQsAN9MVf3ZFvTcAIbk/+GKpCx2qeSZWJWAeCOr10meax0f7ucCrwih /C30xxGahUS1/4rq9SCtlIX1qXGSxgr6g08yb2SKm0pTDLYXKQ2ev+z5jnHcTVmjTU vFQm/jRWPHmKJDvxnWldoWZpmKNOu+hV8L9BzRzUm/DCoWmwKcUv+CdOyS2zGZK48d KCOTiaXJyioCw== Date: Tue, 10 Nov 2026 14:05:13 +0100 From: Maxime Ripard To: Javier Martinez Canillas Cc: Devarsh Thakkar , Maarten Lankhorst , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Nishanth Menon , Vignesh Raghavendra , Tero Kristo , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, LiangCheng Wang Subject: Re: [PATCH v3 00/14] Add DRM driver for Solomon SSD16xx e-paper display controllers Message-ID: References: <20261019213726.4145532-1-devarsht@ti.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha384; protocol="application/pgp-signature"; boundary="klwijyhaeml73kht" Content-Disposition: inline In-Reply-To: --klwijyhaeml73kht Content-Type: text/plain; protected-headers=v1; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH v3 00/14] Add DRM driver for Solomon SSD16xx e-paper display controllers MIME-Version: 1.0 On Tue, Nov 10, 2026 at 01:39:19PM +0100, Javier Martinez Canillas wrote: > Devarsh Thakkar writes: >=20 > Hello Devarsh, >=20 > > This series adds a DRM driver for the Solomon Systech SSD16xx family of > > e-paper display controllers (SSD1673, SSD1680, SSD1681, SSD1683), start= ing > > with support for the Gooddisplay GDEY042T81, a 4.2" 400=D7300 black-and= -white > > e-paper panel driven by the SSD1683 controller. > > > > The driver is designed and architected keeping the bi-stable nature > > and low-power requirements of epaper display based systems in mind > > along with having adequate flexibility to support varying use-case > > requirements for the e-paper display use-cases. > > >=20 > [...] >=20 > > drm/solomon: ssd16xx: Expose refresh mode as plane property > > drm/solomon: ssd16xx: Expose color mode as plane property > > drm/solomon: ssd16xx: Expose session management as plane properties >=20 > There is a fundmental issue with these 3 patches. They are adding custom > device-specific plane properties, but the KMS/DRM subsystem requires all > KMS properties to be generic and standardized: >=20 > https://docs.kernel.org/gpu/drm-kms.html#requirements And with an established open-source project using it. Maxime --klwijyhaeml73kht Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iJUEABMJAB0WIQTkHFbLp4ejekA/qfgnX84Zoj2+dgUCavMWiAAKCRAnX84Zoj2+ dkIwAYC0DtJkAVBm+J23hxDPYN3LOErIFEidODLDtg7h0aQi3Z2BFQwO+PCQIoXo gjP2Z0UBgJVG3tdXOtdyDLFW8PcuEpwqiWW8o07FpgWwqLlSGNUwqc4yhb5dSKLk /nOenbrRCg== =ZC+S -----END PGP SIGNATURE----- --klwijyhaeml73kht--