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 0FE141DFE8; Thu, 20 Jun 2024 14:05:24 +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=1718892326; cv=none; b=CXuipTozxua/KmvaRK2WpSeDEbc5bWuubbzBT4puVRzvCzgEsjfEuNgapIq54kwQyd3KT/io5XsfimnP0PaMZ+MfONorXY/aXxj7gKGnMUImCgdzYgKSl88hkAh8jBgPVjqYN1DY9MTNwoTk8iHLQZfm/IukiY+3EKcNteFopKk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718892326; c=relaxed/simple; bh=OoXfGaWkhDj/PfM8zobnCd3uhBuc4ysc1vSHDDRSRWE=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=oE0uhrOqF99sVO/nLAMYIhdwj6eDBnTl5nsl7YTUZhLmV2Ov2tyBBiy+JpNX/GsCxHVHX4zhHKZKL6PG4fpob6eMfmXkopLaq7Rp0rtFEUqq51uFJV6xprebc7z3ICJOZ3/d1/YsObgVQRYKhQh7Cu1Dz1qpbbIN2s9FLobYY60= 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=4vVGhp9a; 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="4vVGhp9a" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1718892323; bh=OoXfGaWkhDj/PfM8zobnCd3uhBuc4ysc1vSHDDRSRWE=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=4vVGhp9a2oNFy7fmpMTTu/k33zi8F84kKFY3HJV27PQRq9NJHNW5YYykuVIRw8DaB MzXl2462a3Bd9C4YMrmj70hoYzXGYXtXMWfntkeWBY3CiUZjy1N1gJU0rebGp/EzxV smJm7fRp4EGkKjAdemAwQofPwBcPsAaYwBolf9hOL4eUsWtQfga4U5eJ0zNS4Lqfvi iQ6fmIWl953g5jCUK+1dBDm/7y2rtOBbC840EBOMPO1mRaN0AXJ5id+97OVvokKJyf NnIj3N61U8JyyA0k6Q7VG9q7MPaO1xFvaVrXjoKyzs6F0TLs1BWWU8XE4bYWjBz7Wz SXixM31jAdt3Q== Received: from nicolas-tpx395.localdomain (cola.collaboradmins.com [195.201.22.229]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) (Authenticated sender: nicolas) by madrid.collaboradmins.com (Postfix) with ESMTPSA id 3D3F637821B9; Thu, 20 Jun 2024 14:05:21 +0000 (UTC) Message-ID: Subject: Re: [RESEND PATCH v6 2/4] media: chips-media: wave5: Support runtime suspend/resume From: Nicolas Dufresne To: Devarsh Thakkar , "jackson.lee" , "mchehab@kernel.org" , "sebastian.fricke@collabora.com" Cc: "linux-media@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "hverkuil@xs4all.nl" , Nas Chung , "lafley.kim" , "b-brnich@ti.com" , "Luthra, Jai" , Vibhore , Dhruva Gole , Aradhya , "Raghavendra, Vignesh" Date: Thu, 20 Jun 2024 10:05:18 -0400 In-Reply-To: <881dcea1-a592-4506-083a-9d5f3c6a8781@ti.com> References: <20240617104818.221-1-jackson.lee@chipsnmedia.com> <20240617104818.221-3-jackson.lee@chipsnmedia.com> <6e6f767c-85e9-87f6-394f-440efcc0fd21@ti.com> <881dcea1-a592-4506-083a-9d5f3c6a8781@ti.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.52.2 (3.52.2-1.fc40) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hi Devarsh, Le jeudi 20 juin 2024 =C3=A0 15:05 +0530, Devarsh Thakkar a =C3=A9crit=C2= =A0: > In my view the delayed suspend functionality is generally helpful for dev= ices > where resume latencies are higher for e.g. this light sensor driver [2] u= ses > it because it takes 250ms to stabilize after resumption and I don't see t= his > being used in codec drivers generally since there is no such large resume > latency. Please let me know if I am missing something or there is a stron= g > reason to have delayed suspend for wave5. It sounds like you did proper scientific testing of the suspend results cal= ls, mind sharing the actual data ? Nicolas