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 64F5039FCB1; Wed, 30 Sep 2026 08:48:22 +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=1790758103; cv=none; b=fCyq2A2M+utIGPvc0fqu5vuKgv9BeyxmMAwuvzzGk/G4G+tjX+xBlu136VMvaDwoiNLnMGG76YznL5zYj5u2wbBAjtz85FThv2m3s+41m2vgKP9bmRG6h0v7B8w1jmx9/csmHhSk7nkuE1h/vJXM/OQnbyrlCWjSRR/iQfa/b/M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790758103; c=relaxed/simple; bh=EHn7VT8wUCA4/M/RX+kxLjyHSv+sVWPdsu1VehQjMbo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=I1gWN4iWLQFnRG4YSu0yzTAyw/yoSRHIOI9YpyuXz+EsMQal4o1Z5YVjFEuDCqYDQwIsYyg/w1JPAeSj8NtUur2LljPQKm+BiUFRcqFDH0MhLSMNf+9V+CKgqCg7bwpAwjB0olzz7gj36Ddzw7YQpDiuT4L7Yf5SJVuZi8gQpqI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cXNGNwnJ; 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="cXNGNwnJ" 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> 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="sfxgfbu7erd5aek2" Content-Disposition: inline In-Reply-To: <20260930070535.47130-5-clamor95@gmail.com> --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. 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