From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 69295606A326 for ; Mon, 2 Nov 2026 23:42:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=sGFD8DRK; dkim=pass (1024-bit key, unprotected) header.d=ideasonboard.com header.i=@ideasonboard.com header.a=rsa-sha256 header.s=mail header.b=gWUj0o1K DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=ozF3h4aUekaFNOe7DRyg0a3bh7Yt4mQLO1saPU6M4xE=; b=sGFD8DRKkBy574LEmYYSAKU5fh 9Wbk03wcECzYaKihoPq7dLa70CCVekdqKve1itXiJeYHLbIP8puTQidJ2uQbtahK7GrP2bcMSsS7D clBmu9kkkTfQLurP3jkJBQjG26CELf2/ypaK8UNuOZquHtKiRVvUL9N1exhj76rswJ/ocrkpraC9O gtTbOXd40/TyT2kv+YHGX7rZwj8m0UwgUp1lj0j7v3AOXtC93rSKRBC+Q4Q89CE3Ab0syGk6T1q2S NAtAYxMKTHvyoPKFy91RoaAtp49n7s7cD7MKz6ygGlqhdPqvfwtDrVpd0DJDmQV7XJqHprf/yHjaI XV8CUrXQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xO1fp-00000000fS0-0RMm; Mon, 02 Nov 2026 23:42:45 +0000 Received: from perceval.ideasonboard.com ([213.167.242.64]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xO1fm-00000000fQv-3tUF; Mon, 02 Nov 2026 23:42:44 +0000 Received: from killaraus.ideasonboard.com (2001-14ba-70f3-e800--a06.rev.dnainternet.fi [IPv6:2001:14ba:70f3:e800::a06]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 3690BB1A; Tue, 3 Nov 2026 00:40:23 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1793662823; bh=wAQ2GsgCD/YQbE45EYrTMRsnhVSS61FPzdNJs1TgxY4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=gWUj0o1Kms6l1VLKnhTo6f94CoPkynqMsMINex1oVsbdXynf0+v1F0br2jDDty1aE xqjTIiVcZmsIirZnG7OlMKxcxxNTLaTgUIpgrhpH2lUXFDHoV/CXIEYtL+g2dAnKU8 GWEebUM2t1mKqXLfiWaY1IMeF5eY7em2SfYV2bKE= Date: Tue, 3 Nov 2026 01:42:38 +0200 From: Laurent Pinchart To: Igor Velkov Cc: Dafna Hirschfeld , Mauro Carvalho Chehab , Nicolas Dufresne , Hans Verkuil , Heiko Stuebner , linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] media: rkisp1: Depend on PM Message-ID: <20261102234238.GD3559911@killaraus.ideasonboard.com> References: <20261102-rkisp1-depends-on-pm-v1-1-35a26cb2bbce@iav.lv> <20261102223316.GB3548113@killaraus.ideasonboard.com> <20261103005500.rkisp1-pm-reply-1@iav.lv> <20261102231206.GA3559911@killaraus.ideasonboard.com> <20261103-rkisp1-pm-reply-2@iav.lv> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20261103-rkisp1-pm-reply-2@iav.lv> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261102_154243_118531_1CF6F2B4 X-CRM114-Status: GOOD ( 13.58 ) X-Spam-Score: -2.1 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-5.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Tue, Nov 03, 2026 at 01:25:45AM +0200, Igor Velkov wrote: > On Tue, Nov 03, 2026, Laurent Pinchart wrote: > > What does the driver bind to when running on a system that has PM=n ? On > > which platform can that happen ? > > None that I can name: the nodes exist only on Rockchip and i.MX8 boards, > and those select PM. The patch came out of the rkvdec thread, where Nicolas > pointed out that with PM=n the first MMIO access can hang and asked to > check similar drivers [1]; rkisp1 and rga had the same pattern. If that > case is not worth guarding, I'll drop it. Given that it can't happen on any platform, I don't think the patch is needed. > [1] https://lore.kernel.org/r/8aafdbbf04a0d939c6b4d7d5577d97bb58d1c439.camel@collabora.com -- Regards, Laurent Pinchart