From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4FF98C433EF for ; Wed, 22 Dec 2021 13:01:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: In-Reply-To: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-Owner; bh=ecuazMNAayLUjGy48cm/MXy51EC61z60qB74907Fp/o=; b=yOpKq5RTX3YhVxaJaFl7O+AHOU SdSGOCysSSFjJSUla5rMpijQ4sho1+YXxqp9zifcgDqcO4Y0q0dNwnrQGx4JtibwLafVncUch1Z0m x/l3zEliYZwb+1q9lYn5h1QsapMLEAkYKzLaJ7QTBYoZM7aBJpuESiLOKWjHA7YDvE9/ZJEB5evjv oOEdxdePWWS5iJcM8BskwDdiyh9ADuF9T9+7bXh9VIZudwYu1edCkcnpiqzif/zZ5CQuVhoziIgVL +azh0pfHjXhb9pMyvCETrAO7rAQ9PSkSZtz6gs8y5b0aohfcwyi/SWmjM2Pw+V5zzbz0eUk05AY9T mfS+dYbw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1n01EU-00ANEt-8V; Wed, 22 Dec 2021 13:00:38 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1n01EQ-00ANE4-HA; Wed, 22 Dec 2021 13:00:35 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 47EAEB81C15; Wed, 22 Dec 2021 13:00:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 736CDC36AE8; Wed, 22 Dec 2021 13:00:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1640178032; bh=kEOEigIq41/1QX4kSiudwGKYHYU6CkFSbG6FTLQpIQM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ne1CMMyAHxstvfr/V8j/AFNByX++LxVo0xkNPS8ODCs/h4HtwCa/4yOYR9+p/MWOz 92reUdJcLs0QNPqSTIm9iRtCkE1wtmhLINw6lzdmDACwkL8dudc8uvZEgB6NzdilaQ JPnfdWE5FWm7Ume3XRvVp+Wm3G0fum+Mxk1uE22vcKrA+96muECeg7qHjrylGaIDi9 XO9gdPo8yw7SMM5UxM0u98MQukxPai/zmkqtmVx2Sn412+ljZdNWbNrilSgSqO+cRv sDWtkCFwZxEPThXg3wehmag+ACzL5eLTN5HUDvvPsGcrN6FU3ld8brMZ1F15MP7BNW FFxpNXQ8BG1kQ== Date: Wed, 22 Dec 2021 13:00:27 +0000 From: Mark Brown To: Robin Murphy Cc: Sascha Hauer , linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Heiko Stuebner , Michael Riesch , kernel@pengutronix.de Subject: Re: [PATCH 3/4] soc: rockchip: power-domain: Add regulator support Message-ID: References: <20211217130919.3035788-1-s.hauer@pengutronix.de> <20211217130919.3035788-4-s.hauer@pengutronix.de> <20211220094435.GU6003@pengutronix.de> <20211222104036.GY6003@pengutronix.de> MIME-Version: 1.0 In-Reply-To: X-Cookie: Weekend, where are you? X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211222_050034_736955_57638D2A X-CRM114-Status: GOOD ( 14.12 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============5364880042509202012==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============5364880042509202012== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="DGTpK7jlZKAG0XlA" Content-Disposition: inline --DGTpK7jlZKAG0XlA Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Dec 22, 2021 at 12:54:06PM +0000, Robin Murphy wrote: > Certainly RK3399 (and I guess RK3288 too) suffers from the same > priority-inversion issue of being unaware that VD_GPU needs power before > PD_GPU can be successfully turned on to probe the GPU to claim and enable > the regulator (via "mali-supply" for DVFS purposes) that needed to be on in > the first place. Currently all the boards are bodging around this with > "regulator-always-on" (e.g. commit 06b2818678d9). Does the SoC actually support the supply being completely off in operation? A lot of devices want everything powered even if idle during full operation since keeping voltage differentials smaller makes it a lot easier to design to avoid leakage current type issues at the points where the different power domains connect. --DGTpK7jlZKAG0XlA Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmHDIWoACgkQJNaLcl1U h9A/JQf/fcUe2QZ62Y4+EjMNfndER1TUPDdtE0POgYNbuZZlGy4GIDi2zW8A8mwk Ng67EZKHZS4S2FlNbx8JY/jAlKmod0A1m7pm3RdifiI5pxtVhZJ/AfwMJqVbYwxM Upds1v0mA5kqxbGSqTy1u/v1UgLNXQonXV9A4GPX6RnZTSFizAbsoob87FMEwczq R6DkIXXbAcZa2eqEe5rebvM3hgloyZEMD3DLk5Bcvi89JIqEZXPlyOM0itZXv8cD ZlbYQNHlz51ms+UG/GPRavymqa8sR2lfxFsKd82qyKHfYD1uvJHbaGoCyOp2habF ucQwCWa+naTJUCXW1hxdg9G0bM0Lpg== =SprL -----END PGP SIGNATURE----- --DGTpK7jlZKAG0XlA-- --===============5364880042509202012== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============5364880042509202012==--