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 phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 30F14C3DA7D for ; Wed, 4 Jan 2023 00:49:04 +0000 (UTC) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id B97AC85309; Wed, 4 Jan 2023 01:49:01 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Received: by phobos.denx.de (Postfix, from userid 109) id 0162C85548; Wed, 4 Jan 2023 01:48:59 +0100 (CET) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by phobos.denx.de (Postfix) with ESMTP id EE96181A10 for ; Wed, 4 Jan 2023 01:48:56 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=andre.przywara@arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E1D2E1063; Tue, 3 Jan 2023 16:49:37 -0800 (PST) Received: from slackpad.lan (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id AC5603F663; Tue, 3 Jan 2023 16:48:55 -0800 (PST) Date: Wed, 4 Jan 2023 00:47:16 +0000 From: Andre Przywara To: Jernej Skrabec Cc: jagan@amarulasolutions.com, u-boot@lists.denx.de Subject: Re: [PATCH 0/8] sunxi: Update H616 DRAM driver Message-ID: <20230104004716.5a07be57@slackpad.lan> In-Reply-To: <20221211163213.98540-1-jernej.skrabec@gmail.com> References: <20221211163213.98540-1-jernej.skrabec@gmail.com> Organization: Arm Ltd. X-Mailer: Claws Mail 4.1.0 (GTK 3.24.31; x86_64-slackware-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.6 at phobos.denx.de X-Virus-Status: Clean On Sun, 11 Dec 2022 17:32:05 +0100 Jernej Skrabec wrote: Hi Jernej, > Current H616 DRAM driver is completely customized to Orange Pi Zero2 > board, which is currently the only H616 board supported by U-Boot. > Needless to say, this is not ideal for adding new boards. With changes > in this series, all DDR3 boards are supported and all that is needed is > just vendor DRAM values extracted from Android image. New DRAM types > should also be easier to support, since a lot of constants used before > are not really DRAM type dependent. > > Changes were verified by decompiling driver and generated values were > compared to previous, hard coded ones. This was done without dram_para > structures, so compiler was able to heavily optimize code and produce > constants. so many thanks again for putting this together! I came to like (the idea of) this series very much lately, as this removes timing/delay values from the code, and easily allows putting the vendor provided values in the defconfig. I used that approach as well for the D1 driver, and am wondering if we should extend this to other SoCs, potentially unifying the Kconfig part? And you hinted at a v2, can you provide an estimate for this? If you send it still this week, I would like to put it into U-Boot's next branch, otherwise it goes straight into master, should the merge window open next week as planned. Btw., to verify the feasibility of drivers/ram/sunxi, I moved the H616 driver into there, together with the Kconfig parts, I wonder what you think about this? An example of how this looks is in the D1 driver patches. Cheers, Andre > > Please take a look. > > Best regards, > Jernej > > Jernej Skrabec (8): > sunxi: Fix write to H616 DRAM CR register > sunxi: cosmetic: Fix H616 DRAM driver code style > sunxi: parameterize H616 DRAM ODT values > sunxi: Convert H616 DRAM options to single setting > sunxi: Always configure ODT on H616 DRAM > sunxi: Make bit delay function in H616 DRAM code void > sunxi: Parameterize bit delay code in H616 DRAM driver > sunxi: Parameterize H616 DRAM code some more > > .../include/asm/arch-sunxi/dram_sun50i_h616.h | 18 + > arch/arm/mach-sunxi/Kconfig | 67 +-- > arch/arm/mach-sunxi/dram_sun50i_h616.c | 445 +++++++++++------- > configs/orangepi_zero2_defconfig | 8 +- > 4 files changed, 348 insertions(+), 190 deletions(-) >