From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 090281D54FB; Tue, 6 Aug 2024 15:03:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722956595; cv=none; b=s0DIAN3GjMe20Q9rdo9cQxMox7V/W2SYa/9kGKvYOmqFIUNBlBqF6cp0X6/wxGfeffdSLUDeCxfuTPqdwtgPgAW7GTHg0JrSjdJjmy8OTS4p79SLJh71oH+ybis0gygPGH28TNortaMzbBiSLDIr86K4lLEbsEMtCli3YVg4Xg8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722956595; c=relaxed/simple; bh=ENTNJkyPlX89nL5MNOvYxxCBQ8yDP7ZF+BIfObGAZJM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Wnipkc2V41A769xbRGNRrW+Xb4sXOwVRBUZ85xWfED/X3kZrqu/9FW0FgtDQ85u8+HQzmk4EV4L+JivoZfMjjnLlsQCUeZKYetOnGHjh18omTM8eGWSvTBh46HQR79vbE+G64wJAFpKsePZ91THy+EDbEeuFyozVaSqzsXKTmDA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OZ7nkTR/; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="OZ7nkTR/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 57FF1C32786; Tue, 6 Aug 2024 15:03:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722956594; bh=ENTNJkyPlX89nL5MNOvYxxCBQ8yDP7ZF+BIfObGAZJM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=OZ7nkTR/4S5vElHLQ4hagaQV5113Lj3/gxJf2sgfoCRIhDuvpx2sW4XfwocCTU028 3pS3UkXr2phokFRO6KYCDzqkbG8qUxNNTNnbKtvNOEmEVG5F6WIariMFCqd1WLgrll 6yCTmndIVGf7YK29VqmU9DmfEpTGJmVO8vpjIxqKFoLtPNM4UV/kLOpuv8xChNrPcV poYnq9PVgo5GOhCc/UyglRYlVtps1SHEdEadmfVcmXDWyeCgVH4zyyyNgcb06U/Iiu YVaN1EOhJDQMTIjYTGibWNU31fLvkX5SrYmf+2YIZS/N48+yhm1d3u6QQJcxplti2r l5uaqrKXrnqbw== Date: Tue, 6 Aug 2024 09:03:13 -0600 From: Rob Herring To: Marc Gonzalez Cc: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Liam Girdwood , Mark Brown , Krzysztof Kozlowski , Conor Dooley , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, Arnaud Vrac , Pierre-Hugues Husson , Dmitry Baryshkov , Konrad Dybcio Subject: Re: [PATCH v4 1/2] dt-bindings: display: bridge: add TI TDP158 Message-ID: <20240806150313.GA1516901-robh@kernel.org> References: <20240730-tdp158-v4-0-da69001bdea2@freebox.fr> <20240730-tdp158-v4-1-da69001bdea2@freebox.fr> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240730-tdp158-v4-1-da69001bdea2@freebox.fr> On Tue, Jul 30, 2024 at 05:01:31PM +0200, Marc Gonzalez wrote: > TDP158 is an AC-coupled DVI / HDMI to TMDS level shifting Redriver. > It supports DVI 1.0, HDMI 1.4b and 2.0b. > It supports 4 TMDS channels, HPD, and a DDC interface. > It supports dual power supply rails (1.1V on VDD, 3.3V on VCC) > for power reduction. Several methods of power management are > implemented to reduce overall power consumption. > It supports fixed receiver EQ gain using I2C or pin strap to > compensate for different lengths input cable or board traces. > > Features > > - AC-coupled TMDS or DisplayPort dual-mode physical layer input > to HDMI 2.0b TMDS physical layer output supporting up to 6Gbps > data rate, compatible with HDMI 2.0b electrical parameters > - DisplayPort dual-mode standard version 1.1 > - Programmable fixed receiver equalizer up to 15.5dB > - Global or independent high speed lane control, pre-emphasis > and transmit swing, and slew rate control > - I2C or pin strap programmable > - Configurable as a DisplayPort redriver through I2C > - Full lane swap on main lanes > - Low power consumption (200 mW at 6Gbps, 8 mW in shutdown) > > https://www.ti.com/lit/ds/symlink/tdp158.pdf > > Like the TFP410, the TDP158 can be set up in 2 different ways: > 1) hard-coding its configuration settings using pin-strapping resistors > 2) placing it on an I2C bus, and defer set-up until run-time > > The mode is selected via pin 8 = I2C_EN > I2C_EN high = I2C Control Mode > I2C_EN low = Pin Strap Mode > > On our board, I2C_EN is pulled high. > > Signed-off-by: Marc Gonzalez > --- > .../bindings/display/bridge/ti,tdp158.yaml | 57 ++++++++++++++++++++++ > 1 file changed, 57 insertions(+) > > diff --git a/Documentation/devicetree/bindings/display/bridge/ti,tdp158.yaml b/Documentation/devicetree/bindings/display/bridge/ti,tdp158.yaml > new file mode 100644 > index 0000000000000..fe3de1534efc1 > --- /dev/null > +++ b/Documentation/devicetree/bindings/display/bridge/ti,tdp158.yaml > @@ -0,0 +1,57 @@ > +# SPDX-License-Identifier: GPL-2.0-only For new bindings: GPL-2.0-only OR BSD-2-Clause With that, Reviewed-by: Rob Herring (Arm)