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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 2414CC433E0 for ; Tue, 16 Jun 2020 19:07:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0425620B1F for ; Tue, 16 Jun 2020 19:07:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730080AbgFPTHM (ORCPT ); Tue, 16 Jun 2020 15:07:12 -0400 Received: from mail.baikalelectronics.com ([87.245.175.226]:50650 "EHLO mail.baikalelectronics.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729841AbgFPTHM (ORCPT ); Tue, 16 Jun 2020 15:07:12 -0400 Received: from localhost (unknown [127.0.0.1]) by mail.baikalelectronics.ru (Postfix) with ESMTP id AD5668030879; Tue, 16 Jun 2020 19:07:04 +0000 (UTC) X-Virus-Scanned: amavisd-new at baikalelectronics.ru Received: from mail.baikalelectronics.ru ([127.0.0.1]) by localhost (mail.baikalelectronics.ru [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3Lnds3tUV9R1; Tue, 16 Jun 2020 22:07:04 +0300 (MSK) Date: Tue, 16 Jun 2020 22:07:02 +0300 From: Serge Semin To: Vinod Koul CC: Serge Semin , Viresh Kumar , Alexey Malahov , Maxim Kaurkin , Pavel Parkhomenko , Ramil Zaripov , Ekaterina Skachko , Vadim Vlasov , Alexey Kolotnikov , Thomas Bogendoerfer , Arnd Bergmann , Andy Shevchenko , Rob Herring , , , , Subject: Re: [PATCH v5 00/11] dmaengine: dw: Take Baikal-T1 SoC DW DMAC peculiarities into account Message-ID: <20200616190702.lf3wq4izevup26q7@mobilestation> References: <20200529144054.4251-1-Sergey.Semin@baikalelectronics.ru> <20200602092734.6oekfmilbpx54y64@mobilestation> <20200616163242.GO2324254@vkoul-mobl> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20200616163242.GO2324254@vkoul-mobl> X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Tue, Jun 16, 2020 at 10:02:42PM +0530, Vinod Koul wrote: > Hi Serge, > > On 02-06-20, 12:27, Serge Semin wrote: > > Vinod, Viresh > > > > Andy's finished his review. So all the patches of the series (except one rather > > decorative, which we have different opinion of) are tagged by him. Since merge > > window is about to be opened please consider to merge the series in. I'll really > > need it to be in the kernel to provide the noLLP-problem fix for the Dw APB SSI > > in 5.8. > > Sorry it was too late for 5.8.. merge window is closed now, i will > review it shortly Yeah, alas It's too late now. On the other hand this is probably for better since I've discovered that the noLLP-related problem is more complicated than I thought in the first place. Yes, the interrupt handling latency will cause the problem with Rx FIFO overflow, but the overflow might still happen due to several other reasons (mostly due to our APB bus being too slow, but it can still be partly fixed, and I am looking for a convenient solution at the moment). So could you please merge the series in without the next patches: [PATCH v5 04/11] dmaengine: Introduce max SG list entries capability [PATCH v5 11/11] dmaengine: dw: Initialize max_sg_nents capability If I manage to fix the problem in general then I'll send another series with those two patches being part of it. Otherwise they won't be much useful for my platform. Sorry for inconvenience and thanks for understanding. -Sergey > > -- > ~Vinod