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 X-Spam-Level: X-Spam-Status: No, score=-11.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7BE32C11F65 for ; Wed, 30 Jun 2021 04:44:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4EEC761CFC for ; Wed, 30 Jun 2021 04:44:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232902AbhF3ErX (ORCPT ); Wed, 30 Jun 2021 00:47:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:52074 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230200AbhF3ErX (ORCPT ); Wed, 30 Jun 2021 00:47:23 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id C2D7D61CEF; Wed, 30 Jun 2021 04:44:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625028295; bh=MpUk3OYLLrhc3PgZfixiENrsTeYhLR3bRUUyRsso0j8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=GQDfAOsNHCezM3alLXe0ZqFsDgRY6UGSI+J7BWkGgnjlLO1zrzd0rbtebJKz0gzlL gGdYsCTGtlC4rlmnoJqT4lBXlJgMH7vzOPNHy/l7j/HnpvtaHWbMRwSe2lT9zRUGUI VQqAL20hHrrtIcnZ2MDUj+/mNLxgYCwsClKaMCKDIDRPi98BSYqQl4f8l77/wmrxvy UjNDQI5J5PAfbRlpBsF59fQ5ue/Pb3/nEvv+sxYqI1PgkGgVhBwPkSf7V1W6/gMCfM QDETXDmOD+diJkolR0ZMms7kYs9dTT6ADCmwIzIS40KWBL0IsG2qHSYZvhAKEjsNeV /2OJmdIFi0r3w== Date: Wed, 30 Jun 2021 06:44:52 +0200 From: Wolfram Sang To: Ulrich Hecht Cc: linux-renesas-soc@vger.kernel.org, linux-mmc@vger.kernel.org, ulf.hansson@linaro.org Subject: Re: [PATCH] mmc: renesas_sdhi: increase suspend/resume latency limit Message-ID: Mail-Followup-To: Wolfram Sang , Ulrich Hecht , linux-renesas-soc@vger.kernel.org, linux-mmc@vger.kernel.org, ulf.hansson@linaro.org References: <20210514155318.16812-1-uli+renesas@fpond.eu> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="fv3Q2RGIDfOHAIe9" Content-Disposition: inline In-Reply-To: <20210514155318.16812-1-uli+renesas@fpond.eu> Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org --fv3Q2RGIDfOHAIe9 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, May 14, 2021 at 05:53:18PM +0200, Ulrich Hecht wrote: > The TMIO core sets a very low latency limit (100 us), but when using R-Car > SDHI hosts with SD cards, I have observed typical latencies of around 20-= 30 > ms. This prevents runtime PM from working properly, and the devices remain > on continuously. >=20 > This patch sets the default latency limit to 100 ms to avoid that. >=20 > Signed-off-by: Ulrich Hecht Ulrich is right that the tuning error is just a cosmetic problem revealed by this patch and not really a regression. We are working on fixing this cosmetic problem. However, this patch is good as is and we finally have RPM working for SDHI with it. I tested RPM and suspend/resume and all worked nicely: Reviewed-by: Wolfram Sang Tested-by: Wolfram Sang --fv3Q2RGIDfOHAIe9 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmDb9sQACgkQFA3kzBSg Kbaj3BAAnjOXYn/J9vqJqpZPVhTrwY7DPwxiiahom9vtrI53r/SV6Y/yEkd82vru rFwRBZG6521xz919XOe6bAs0Zo6UtrkoQvGMKxxjrl3t2Qod9PRkAPmWJUDk8T4v 8Zgfya5prqzrDZ70Hg8sw6rXQV7E+JWmQd1Rx1AkhEBL75P0Ha2ElMnIB1qT/E00 hdDvVvbTWUsK4hbETRgc6yxpLgW3WuQ83JZQUpiQv1FYanyvoX2+mPbtNTHDczfP fBvHX5nCjg/3AF3U9RDirOEdAoNxUqKFaMHeD8Dde8+DWPSrESMAcjoj9Z0Ufima UAlHyQ6FByg8HFA3F5HExDkitxI99R6VOecKxf4HuNhmLxlCIrqz1uo3c4dS9WE9 kxn2yV8VIEtnPyfGlhdNs3rqzCJDogxguOvekMvNb8YuJ4ezOcP/xM85un+ZYaeQ a5UkzrcYj7Ns5hJgstDh4Kw+nmaGBo/1AF8lVl9hm/0g8mqMeBUaCwrN+xnhbsyS 5fw3Ni3lB6CSoPjyvQDH7qZn7iJN22L5tW6zM2dsL41PkaDtejE/Hv/LUYIRnkHC M2uI2llUmRJy5nOeQGfflEoySdc86PgBUCPjXgDJJqiaM4iL1JV4FNAffWUs3FC7 Eil6rrzhMXjD3RJ+8M/GH+T2lCCilUSQkZu0J8xTiCidmo4nZQc= =gPKX -----END PGP SIGNATURE----- --fv3Q2RGIDfOHAIe9--