From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from madrid.collaboradmins.com (madrid.collaboradmins.com [46.235.227.194]) (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 41BCE44374 for ; Wed, 22 May 2024 07:13:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=46.235.227.194 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716362021; cv=none; b=pjIeGHC5UGgA+VWhqqByHRoWfMlpg3Qsyrmhm/tPA6dFkbVGVzhEnh7C/B6/8sP+z5urgqIsng+TeoFEemyxbI7s2ZnvbbduMlzwWKaSataQKhsl/urGKcqCnX4S/PLbbU365weKnrz5fpdIvVSHNSr7qh2MT/CJz2y6KIQsKYA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716362021; c=relaxed/simple; bh=ovjsPfFfFox4+imrFSPnYzf2/8RO117uDA2zkRXNfwA=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=LqNeXja+iGwdm4vKs8LENKF3y6mHZPgnwziJdYC+90OdpqHRzaxn7Xw3QCZFLioe6YQXp98wTZYFrWHMhFC0oj4L4SGlgjtwJx2jaSIBzQI8aDEYa5fP6LYeljIARDdOkq5teF0u3dRUB4/BdNyfK8Urx0Gwp5wE2hbEBGx04DU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=KkFRQKz0; arc=none smtp.client-ip=46.235.227.194 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="KkFRQKz0" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1716362017; bh=ovjsPfFfFox4+imrFSPnYzf2/8RO117uDA2zkRXNfwA=; h=Date:Subject:To:References:From:In-Reply-To:From; b=KkFRQKz0MxzG22OOPEO8j67lNYRPlqtfyMac+UsYjN4SRbp3Xa5KiRCexxYiKyLAy EUAwRR4/QxCU+H6QkD/HrDOcMBU31d58wVIIIWz4ls5Z4Mg3qk2b1MSfDnFmd9ZH/K P9LhoXe0Ne5BsbYtzAw5nfHIAhwEwIjOko8f49go1pG0pvYY8T14A9QBamezgl7eNN 299ya3lanlzRA3SyuskG0aQmnWVkspFZ26QN2IGCD4dnvfV/PJ+xGUDIuoevhnDM4d U0beMYKzKSE/zBLjcMX3Xj4xiVHieKNofMi9rQYYWOWKJxjwKwnAmGz9WPZshe16dh 6kOBl4NFY8yQw== Received: from [100.113.186.2] (cola.collaboradmins.com [195.201.22.229]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madrid.collaboradmins.com (Postfix) with ESMTPSA id 1B2B23782157; Wed, 22 May 2024 07:13:36 +0000 (UTC) Message-ID: <36052284-6b17-4b3f-ab99-a01beed4c601@collabora.com> Date: Wed, 22 May 2024 09:13:35 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v13] drm/bridge: it6505: fix hibernate to resume no display issue To: kuro , Pin-yen Lin , Kenneth Haung , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Hermes Wu , Allen Chen , "open list:DRM DRIVERS" , open list References: <20240522065528.1053439-1-kuro.chung@ite.com.tw> From: AngeloGioacchino Del Regno Content-Language: en-US In-Reply-To: <20240522065528.1053439-1-kuro.chung@ite.com.tw> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Il 22/05/24 08:55, kuro ha scritto: > From: Kuro Chung > > When the system power resumes, the TTL input of IT6505 may experience > some noise before the video signal stabilizes, necessitating a video > reset. This patch is implemented to prevent a loop of video error > interrupts, which can occur when a video reset in the video FIFO error > interrupt triggers another such interrupt. The patch processes the SCDT > and FIFO error interrupts simultaneously and ignores any video FIFO > error interrupts caused by a video reset. > > Fixes: b5c84a9edcd4 ("drm/bridge: add it6505 driver") > Signed-off-by: Kuro Chung > Signed-off-by: Hermes Wu Reviewed-by: AngeloGioacchino Del Regno