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 B18E1CA5FC1 for ; Wed, 30 Sep 2026 08:48:24 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 135E910F25C; Wed, 30 Sep 2026 08:48:24 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="cXNGNwnJ"; 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 58C1910F25C for ; Wed, 30 Sep 2026 08:48:23 +0000 (UTC) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 5F8E1600D4; Wed, 30 Sep 2026 08:48:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 847D11F000FF; Wed, 30 Sep 2026 08:48:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790758102; bh=Nc/aa8xu9LXaTHuQoPMpSRjwWnzlHbzUU58AxGBc5qE=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=cXNGNwnJ4MHkJ3gixunQ/me8qoYEvsG9yBcsn8Q6jiVcvNLnuV0cJi4ioqggBZ/dt KkSK5pZR691N2FhapUdpIMHqxIg754rAwM7CXxxTMqsV0vNb4y1Bb10eD+oqWWsk1G KPIxSv8epfvelTE5D8JpJqut0wLg+0BCNDk9IsY0kfLN6nlZETisev5YAr9adonG7R P17+yQrVBk1MPQvklceluBNqGoIS3qE/KQ0tBhL3me9B/027UXssN0oce0JwRX1MAz 3Xfn/e7Q0NRb+XSPQajFmLE04DQ4Q7LB75L4VSYhGIsyiHVqo2S8XMcBoTmTqb3EhA GvbZkIs9R53lg== Date: Wed, 30 Sep 2026 10:48:19 +0200 From: Thierry Reding To: Svyatoslav Ryhel Cc: Neil Armstrong , Jessica Zhang , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Hunter , Mikko Perttunen , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org Subject: Re: [PATCH v1 4/6] drm/tegra: Add support for 8-bit CPU interface Message-ID: References: <20260930070535.47130-1-clamor95@gmail.com> <20260930070535.47130-5-clamor95@gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="sfxgfbu7erd5aek2" Content-Disposition: inline In-Reply-To: <20260930070535.47130-5-clamor95@gmail.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" --sfxgfbu7erd5aek2 Content-Type: text/plain; protected-headers=v1; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH v1 4/6] drm/tegra: Add support for 8-bit CPU interface MIME-Version: 1.0 On Wed, Sep 30, 2026 at 10:05:33AM +0300, Svyatoslav Ryhel wrote: > The display controller in Tegra20/30 SoCs features an 8-bit SPI interface > that closely resembles the MIPI DBI Type B protocol and is referred to as > '8-bit CPU'. Each display controller provides two such interfaces, which > can be used to send MIPI DCS commands to initialize and control the panel > while image data is transmitted via 16/18/24-line RGB. >=20 > Signed-off-by: Svyatoslav Ryhel > --- > drivers/gpu/drm/tegra/Kconfig | 7 + > drivers/gpu/drm/tegra/Makefile | 1 + > drivers/gpu/drm/tegra/cpu-bridge.c | 427 +++++++++++++++++++++++++++++ > 3 files changed, 435 insertions(+) > create mode 100644 drivers/gpu/drm/tegra/cpu-bridge.c This doesn't need to be a separate driver. It should all live in dc.c. Or maybe even rgb.c, since it uses pretty much the same pins and is quite similar to it. Thierry --sfxgfbu7erd5aek2 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEiOrDCAFJzPfAjcif3SOs138+s6EFAmq8zNMACgkQ3SOs138+ s6HbVxAAsIqUHzRlTa+PVebDe1OL+9I7ADlIyY5pCPTGU6SfwmWSxZUN5KFu89ib ME3TcAl4GcovrXFa33iN1mBI25olvhIlTcJw3CuTjQvc8ecrARVFVRxrGWAgJ5Fj eYDiQ3IaFV2NJNxTCuvD+LEhptA3a7MmKi4JbTEJjDOmvv9dRKD4Hzfas0jFAYD1 2+ZdSaN4GE0bFQWiWvtkoE3D7cpKeF/bGO9JqQhln8Z4l1fx57dLlB/uOhlUd3Xf ANTvqGNJohRFNCt4A+f6AnXQfCy6Nh34cHS9FAjm+KW0S+Frgb7mPpYoHBLBrT5/ l/ZZsHihMppsTFAjG3lIctNN43TsaUjIbRmAR4rVp5qNO7uws3ymxDjdkz5VxorI ShvmHKhkWZtvYWLEmVezuumKIs2xTfMY0dPPFrXjL8avDsq+Digw1kvYA+iUJwiv CjAbcERB42YAEl0qomHHtoprHt1/iL2pIgnm3/HrsFNgillUgWkfLMLnPql8zYJd k1bGc1YFRMO81RVu9X02fBb3fcRsM8RBlOGsKKCGXPRwygk31mghrQLbMWUvvRa4 PY2+ckm7gjmQGTd66dexU3p14Jxa4eFufRMT0dG5LPuOLS9qkZS7FY/XpIYvwG0o vOqpeJLDU7lUqSm5s7dJsWJP0wDU9JLJCgN2jtQdEDIejgEITtc= =4+YO -----END PGP SIGNATURE----- --sfxgfbu7erd5aek2--