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 B920912B93; Fri, 29 Nov 2024 08:21:20 +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=1732868480; cv=none; b=P+J3yrvBfZRqsgFusHuqaiVMrbjL/OiYf/NcDjZdPCcOrjyt7Zfug77CuM1HSjkNNGMcfrzPBcLw+uQkkleHiVyjradfGxybW38FLPMtqLfvuY/9mfrZKDsb3uR297rNY6PS7Yuu69mWenmZnDONUjNeXUb8PC6/18AaJIyvp2E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732868480; c=relaxed/simple; bh=KZ7ntoFjiRE4qae6dkopyRJLmQ10JWGG6InjMJTRkT4=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ntt6Rpv4G+1+FCZtVbN275QhvvZ94Y2FgeHKt6AGCxOLXoGjAYYKOjJestCI+zQQ+dhNcAy7NQ82EE5z42bD9O/MxIWNEPCpAaPui9GDVrJSV+tJccrhLJoT7w7Kw1OErSPXB7PX8DyGhzjVR6pamnldjGuSN9HKTnu/DqS/7H0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=B7hJyQr2; 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="B7hJyQr2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 856B5C4CECF; Fri, 29 Nov 2024 08:21:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1732868480; bh=KZ7ntoFjiRE4qae6dkopyRJLmQ10JWGG6InjMJTRkT4=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=B7hJyQr2adnxbl6WkkiCsz6QtzYu1jwp6HCl2VfCsV6WebVjB7BjLa3xkpSjWoB2z Jiyt9WU94BvPBNU7fK6mPQodt+BjouxOEpilzk9cXeESLUMNK6QgyN1/W3kC2fr/Lx L+2fEDVTfpBvV3ng9HGequHoLsgDw/GHhBUEz/CsGW2g55c1N+Bx66IBPriSXAtFoV a2Sqp4Hd4mza32JS7i9MgEWCQMza7IRw1Blv1LzQ/XYvJQChz4Cc3V6uqlc1grFou0 akHoETfTE+Cf3sv2pA27SNWevNtAWBPa4bYn8Pa0mS5TCKmQTDtZTABkLz+4p+aINE Xpp7sVNNj6epw== Message-ID: Date: Fri, 29 Nov 2024 09:21:08 +0100 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 8/8] drm/msm/dp: Support external GPIO HPD with 3rd pinctrl chip To: Xiangxu Yin , Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , Marijn Suijten , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kuogee Hsieh , Vinod Koul , Kishon Vijay Abraham I , Linus Walleij , Bartosz Golaszewski , quic_lliu6@quicinc.com, quic_fangez@quicinc.com Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org, linux-gpio@vger.kernel.org References: <20241129-add-displayport-support-for-qcs615-platform-v1-0-09a4338d93ef@quicinc.com> <20241129-add-displayport-support-for-qcs615-platform-v1-8-09a4338d93ef@quicinc.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 29/11/2024 08:57, Xiangxu Yin wrote: > > + if (of_find_property(pdev->dev.of_node, "dp-hpd-gpio", NULL)) { > + dp->ext_gpio = true; > + dp->gpio_num = of_get_named_gpio(pdev->dev.of_node, "dp-hpd-gpio", 0); > + if (dp->gpio_num < 0) { > + dev_err(&pdev->dev, "Failed to get gpio:%d\n", dp->gpio_num); > + return dp->gpio_num; > + } > + > + if (!gpio_is_valid(dp->gpio_num)) { > + DRM_ERROR("gpio(%d) invalid\n", dp->gpio_num); > + return -EINVAL; > + } > + > + rc = gpio_request(dp->gpio_num, "dp-hpd-gpio"); This is not how you request GPIOs. All this code is just wrong. See Gpiolib API description/document. Or any other driver using GPIOs. Best regards, Krzysztof