From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5C830606E45B for ; Tue, 10 Nov 2026 13:05:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=I88pSvG2; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Vuu3b3LC DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; 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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-Archived-By: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha384; protocol="application/pgp-signature"; boundary="klwijyhaeml73kht" Content-Disposition: inline In-Reply-To: X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-5.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 --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--