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 A2C471CB306; Tue, 18 Jun 2024 09:20:31 +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=1718702432; cv=none; b=n+FFfJYHeNeeYjABN4q1h47NKHVE7lvIAPxNCh/xc6QBXmzwkafQZkyBVddBtzNHcc8X8B3YEyOCVSjlG7rIHGgZvcrpTXnB15OYiSdtOs5GOaSdJQbeiqpySQMXktTXcun18s3yRzftQ2u/gpA/4Kq5nF4kmpBbga6mcaUZMUU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718702432; c=relaxed/simple; bh=vIFhwnIZEubFvJ3kvhDrto/wuAS+Z3gu3O4MQYZKIQc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=R3CtiMvUzlW7YgdnhDrBFre9ZBpVNGmssvYRARXULb2cI1M7gfk/50hF8TmSPweI4vOZYRguab759S8B54rBS9m0Z6S4Qm4FchyctxUx2oAYq8Mkf5/3NPXTgLWDSv/JtA4BDqQj4gDKVrluejyDt7aBI/mVq+cPfSdM2cnzlq4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=N3eSqpzq; 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="N3eSqpzq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7F0C1C4AF1D; Tue, 18 Jun 2024 09:20:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1718702431; bh=vIFhwnIZEubFvJ3kvhDrto/wuAS+Z3gu3O4MQYZKIQc=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=N3eSqpzqiFFqPbcjoYUG3B9g+XOosfCcKg2etM8aYGmdwNYom5sivOfdGIGD+/+jd dnaoovGGr08ikrUY/ZFwlftN7N/fdtX1XjPeP4Qx5KUe3Qxnc3qcTVehcLz9VXdAZN BqgYJ1Ad/zj2zsJSxO8pet3mGgPDjo9mDjjtyylSzsmKZM7/bDzFt3SZHSoTjdbniJ u+cQ4nMhgj6KKkv6xBQ62unhTE/9z42/9scgIrLJpKdwPlRVArRpfLYeqElU7ZU6Vz r2GtxN8WZjGoJGjh+3yk7kT4EyBuy30F3d3uHGLCWVbankGL9yZTi8twwssvWWikWr lbKTu1hT3UzwA== Message-ID: <7abe0097-8a19-47a5-85d2-b7cedcb31b75@kernel.org> Date: Tue, 18 Jun 2024 11:20:20 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 2/3] drm/panel: st7701: Add support for SPI for configuration To: Hironori KIKUCHI , linux-kernel@vger.kernel.org Cc: Jagan Teki , Neil Armstrong , Jessica Zhang , Sam Ravnborg , David Airlie , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org References: <20240618081515.1215552-1-kikuchan98@gmail.com> <20240618081515.1215552-3-kikuchan98@gmail.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 18/06/2024 10:15, Hironori KIKUCHI wrote: > The ST7701 supports not only MIPI DSI, but also SPI as an interface > for configuration. To support a panel connected via RGB parallel > interface, add support for SPI using MIPI DBI helpers. > > Signed-off-by: Hironori KIKUCHI ... > + > +static int st7701_spi_probe(struct spi_device *spi) > +{ > + struct st7701 *st7701; > + struct gpio_desc *dc; > + int err; > + > + err = st7701_probe(&spi->dev, DRM_MODE_CONNECTOR_DPI); > + if (err) > + return err; > + > + st7701 = dev_get_drvdata(&spi->dev); > + st7701->write_command = st7701_dbi_write; > + > + dc = devm_gpiod_get_optional(&spi->dev, "dc", GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE); Nope, you cannot use GPIOD_FLAGS_BIT_NONEXCLUSIVE outside of regulators. I don't see any code for ensuring proper simultaneus access. Best regards, Krzysztof